ID: 2164

AQSQID: 460290002

Site Name: Watertown

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

Updated: Oct. 25, 2021, 9 a.m.

Location: Watertown (3rd Ave Swest), SD

Reporting: False, Located: True

Current AQI: None

Watertown (3rd Ave Swest) SD, US: 44.89965, -97.128802

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Oct. 22, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 11.0 μg/m3 (11) 3.9 μg/m3 (17) 17.0
 
Oct. 22, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 11.0 μg/m3 (11) 5.6 μg/m3 (24) 24.0
 
Oct. 22, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A 7.0 μg/m3 (7) 4.4 μg/m3 (19) 19.0
 
Oct. 22, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 5.0 μg/m3 (5) 0.0 μg/m3 (0) 10.0
 
Oct. 22, 2021, 7 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) 0.8 μg/m3 (4) 13.0
 
Oct. 22, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 9.0 μg/m3 (9) 1.3 μg/m3 (6) 13.0
 
Oct. 22, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 8.0 μg/m3 (8) 1.5 μg/m3 (7) 11.0
 
Oct. 22, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 7.0 μg/m3 (7) 3.4 μg/m3 (15) 15.0
 
Oct. 22, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 7.0 μg/m3 (7) 6.3 μg/m3 (27) 27.0
 
Oct. 22, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 10.0 μg/m3 (10) 5.4 μg/m3 (23) 23.0
 
Oct. 22, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 9.0 μg/m3 (9) 1.3 μg/m3 (6) 16.0
 
Oct. 22, 2021, midnight N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 9.0 μg/m3 (9) 2.7 μg/m3 (12) 17.0
 
Oct. 21, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 4.0 μg/m3 (4) 4.4 μg/m3 (19) 21.0
 
Oct. 21, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 5.0 μg/m3 (5) 4.6 μg/m3 (20) 23.0
 
Oct. 21, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 8.0 μg/m3 (8) 3.9 μg/m3 (17) 25.0
 
Oct. 21, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 13.0 μg/m3 (13) 1.8 μg/m3 (8) 24.0
 
Oct. 21, 2021, 7 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) 1.3 μg/m3 (6) 24.0
 
Oct. 21, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 28.0 μg/m3 (26) N/A 26.0
 
Oct. 21, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 9.0 μg/m3 (9) 6.4 μg/m3 (27) 27.0
 
Oct. 21, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 9.0 μg/m3 (9) 4.9 μg/m3 (21) 21.0
 
Oct. 21, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 8.0 μg/m3 (8) 4.9 μg/m3 (21) 21.0
 
Oct. 21, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 8.0 μg/m3 (8) 7.1 μg/m3 (30) 30.0
 
Oct. 21, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 7.0 μg/m3 (7) 3.7 μg/m3 (16) 16.0
 
Oct. 21, 2021, noon N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 6.0 μg/m3 (6) 1.1 μg/m3 (5) 14.0
 
Oct. 21, 2021, 11 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) 0.4 μg/m3 (2) 13.0
 
Oct. 21, 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) 0.8 μg/m3 (4) 15.0
 
Oct. 21, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 8.0 μg/m3 (8) 3.2 μg/m3 (14) 14.0
 
Oct. 21, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 8.0 μg/m3 (8) 4.7 μg/m3 (20) 20.0
 
Oct. 21, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 6.0 μg/m3 (6) 2.5 μg/m3 (11) 17.0
 
Oct. 21, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 6.0 μg/m3 (6) 3.9 μg/m3 (17) 17.0
 
Oct. 21, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 7.0 μg/m3 (7) 5.6 μg/m3 (24) 24.0
 
Oct. 21, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 7.0 μg/m3 (7) 2.2 μg/m3 (10) 17.0
 
Oct. 21, 2021, 3 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) 1.8 μg/m3 (8) 18.0
 
Oct. 21, 2021, 2 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) 2.9 μg/m3 (13) 17.0
 
Oct. 21, 2021, 1 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) 3.4 μg/m3 (15) 16.0
 
Oct. 21, 2021, midnight N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 3.0 μg/m3 (3) 1.8 μg/m3 (8) 14.0
 
Oct. 20, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 1.0 μg/m3 (1) 1.3 μg/m3 (6) 13.0
 
Oct. 20, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 1.0 μg/m3 (1) 2.7 μg/m3 (12) 13.0
 
Oct. 20, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 3.0 μg/m3 (3) 3.7 μg/m3 (16) 16.0
 
Oct. 20, 2021, 8 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) 2.5 μg/m3 (11) 12.0
 
Oct. 20, 2021, 7 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) 3.2 μg/m3 (14) 14.0
 
Oct. 20, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 1.0 μg/m3 (1) 2.0 μg/m3 (9) 12.0
 
Oct. 20, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 2.0 μg/m3 (2) 1.8 μg/m3 (8) 11.0
 
Oct. 20, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 5.0 μg/m3 (5) 3.4 μg/m3 (15) 15.0
 
Oct. 20, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 6.0 μg/m3 (6) 1.5 μg/m3 (7) 13.0
 
Oct. 20, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 5.0 μg/m3 (5) 3.7 μg/m3 (16) 16.0
 
Oct. 20, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 4.0 μg/m3 (4) 4.6 μg/m3 (20) 20.0
 
Oct. 20, 2021, noon N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 4.0 μg/m3 (4) 3.7 μg/m3 (16) 16.0
 
Oct. 20, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 5.0 μg/m3 (5) 5.4 μg/m3 (23) 23.0
 
Oct. 20, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 9.0 μg/m3 (9) 2.7 μg/m3 (12) 12.0
 
Oct. 20, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 10.0 μg/m3 (10) 3.2 μg/m3 (14) 14.0
 
Oct. 20, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 10.0 μg/m3 (10) 3.9 μg/m3 (17) 17.0
 
Oct. 20, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 13.0 μg/m3 (13) 2.5 μg/m3 (11) 13.0
 
Oct. 20, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 11.0 μg/m3 (11) 4.9 μg/m3 (21) 21.0
 
Oct. 20, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 14.0 μg/m3 (13) 6.6 μg/m3 (28) 28.0
 
Oct. 20, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 14.0 μg/m3 (13) 5.9 μg/m3 (25) 25.0
 
Oct. 20, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 13.0 μg/m3 (13) 7.8 μg/m3 (33) 33.0
 
Oct. 20, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 15.0 μg/m3 (14) 8.5 μg/m3 (36) 36.0
 
Oct. 20, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 18.0 μg/m3 (17) 10.5 μg/m3 (44) 44.0
 
Oct. 20, 2021, midnight N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 17.0 μg/m3 (16) 6.8 μg/m3 (29) 29.0
 
Oct. 19, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 22.0 μg/m3 (21) 7.1 μg/m3 (30) 30.0
 
Oct. 19, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 31.0 μg/m3 (29) 11.0 μg/m3 (46) 46.0
 
Oct. 19, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 42.0 μg/m3 (39) 11.4 μg/m3 (48) 48.0
 
Oct. 19, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 62.0 μg/m3 (55) 10.0 μg/m3 (42) 55.0
 
Oct. 19, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 59.0 μg/m3 (53) 6.6 μg/m3 (28) 53.0
 
Oct. 19, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 51.0 μg/m3 (48) 7.3 μg/m3 (31) 48.0
 
Oct. 19, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A 41.0 μg/m3 (38) 8.6 μg/m3 (36) 38.0
 
Oct. 19, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 66.0 μg/m3 (57) 9.5 μg/m3 (40) 57.0
 
Oct. 19, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 72.0 μg/m3 (60) 12.7 μg/m3 (53) 60.0
 
Oct. 19, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 112.0 μg/m3 (80) 10.9 μg/m3 (46) 80.0
 
Oct. 19, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 123.0 μg/m3 (85) 11.4 μg/m3 (48) 85.0
 
Oct. 19, 2021, noon N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 60.0 μg/m3 (54) 11.2 μg/m3 (47) 54.0
 
Oct. 19, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 39.0 μg/m3 (37) 4.9 μg/m3 (21) 37.0
 
Oct. 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 36.0 μg/m3 (34) 4.1 μg/m3 (18) 34.0
 
Oct. 19, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 46.0 μg/m3 (43) 7.3 μg/m3 (31) 43.0
 
Oct. 19, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 42.0 μg/m3 (39) 7.3 μg/m3 (31) 39.0
 
Oct. 19, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 51.0 μg/m3 (48) 5.6 μg/m3 (24) 48.0
 
Oct. 19, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 54.0 μg/m3 (50) 5.1 μg/m3 (22) 50.0
 
Oct. 19, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 55.0 μg/m3 (51) 4.4 μg/m3 (19) 51.0
 
Oct. 19, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 93.0 μg/m3 (70) 7.8 μg/m3 (33) 70.0
 
Oct. 19, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 65.0 μg/m3 (56) 9.0 μg/m3 (38) 56.0
 
Oct. 19, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 72.0 μg/m3 (60) 8.3 μg/m3 (35) 60.0
 
Oct. 19, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A 86.0 μg/m3 (67) 7.8 μg/m3 (33) 67.0
 
Oct. 19, 2021, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 118.0 μg/m3 (83) 7.3 μg/m3 (31) 83.0
 
Oct. 18, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 143.0 μg/m3 (95) 9.2 μg/m3 (39) 95.0
 
Oct. 18, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 169.0 μg/m3 (108) 7.6 μg/m3 (32) 108.0
 
Oct. 18, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A 132.0 μg/m3 (90) 8.3 μg/m3 (35) 90.0
 
Oct. 18, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A 137.0 μg/m3 (92) 10.5 μg/m3 (44) 92.0
 
Oct. 18, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A 159.0 μg/m3 (103) 10.5 μg/m3 (44) 103.0
 
Oct. 18, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 179.0 μg/m3 (113) 5.4 μg/m3 (23) 113.0
 
Oct. 18, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A 173.0 μg/m3 (110) 7.8 μg/m3 (33) 110.0
 
Oct. 18, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 72.0 μg/m3 (60) 8.3 μg/m3 (35) 60.0
 
Oct. 18, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 67.0 μg/m3 (57) 5.6 μg/m3 (24) 57.0
 
Oct. 18, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 67.0 μg/m3 (57) 6.1 μg/m3 (26) 57.0
 
Oct. 18, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 42.0 μg/m3 (39) 6.8 μg/m3 (29) 39.0
 
Oct. 18, 2021, noon N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 44.0 μg/m3 (41) 8.3 μg/m3 (35) 41.0
 
Oct. 18, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 24.0 μg/m3 (23) 4.4 μg/m3 (19) 23.0
 
Oct. 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 25.0 μg/m3 (24) 3.2 μg/m3 (14) 24.0
 
Oct. 18, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 23.0 μg/m3 (22) 1.8 μg/m3 (8) 22.0
 
Oct. 18, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 24.0 μg/m3 (23) 3.7 μg/m3 (16) 23.0
 
Oct. 18, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 34.0 μg/m3 (32) 4.9 μg/m3 (21) 32.0
 
Oct. 18, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 32.0 μg/m3 (30) 4.2 μg/m3 (18) 30.0
 
Oct. 18, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 28.0 μg/m3 (26) 3.9 μg/m3 (17) 26.0
 
Oct. 18, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 33.0 μg/m3 (31) 5.1 μg/m3 (22) 31.0
 
Oct. 18, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 33.0 μg/m3 (31) 7.6 μg/m3 (32) 32.0
 
Oct. 18, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 42.0 μg/m3 (39) 7.5 μg/m3 (32) 39.0
 
Oct. 18, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 50.0 μg/m3 (47) 11.4 μg/m3 (48) 48.0
 
Oct. 18, 2021, midnight N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 48.0 μg/m3 (45) 13.7 μg/m3 (55) 55.0
 
Oct. 17, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 90.0 μg/m3 (69) 4.9 μg/m3 (21) 69.0
 
Oct. 17, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 51.0 μg/m3 (48) 1.5 μg/m3 (7) 48.0
 
Oct. 17, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 11.0 μg/m3 (11) 0.6 μg/m3 (3) 35.0
 
Oct. 17, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 10.0 μg/m3 (10) 2.0 μg/m3 (9) 34.0
 
Oct. 17, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (35) N/A 14.0 μg/m3 (13) 3.7 μg/m3 (16) 35.0
 
Oct. 17, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A 11.0 μg/m3 (11) 4.4 μg/m3 (19) 34.0
 
Oct. 17, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 19.0 μg/m3 (18) 8.1 μg/m3 (34) 34.0
 
Oct. 17, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (23) N/A 44.0 μg/m3 (41) 11.9 μg/m3 (50) 50.0
 
Oct. 17, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 19.0 μg/m3 (18) 4.1 μg/m3 (18) 18.0
 
Oct. 17, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 22.0 μg/m3 (21) 4.9 μg/m3 (21) 21.0
 
Oct. 17, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A 16.0 μg/m3 (15) 4.4 μg/m3 (19) 19.0
 
Oct. 17, 2021, noon N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A 22.0 μg/m3 (21) 3.9 μg/m3 (17) 21.0
 
Oct. 17, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A 13.0 μg/m3 (13) 3.6 μg/m3 (16) 16.0
 
Oct. 17, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 16.0 μg/m3 (15) 5.6 μg/m3 (24) 24.0
 
Oct. 17, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) N/A 15.0 μg/m3 (14) 4.1 μg/m3 (18) 18.0
 
Oct. 17, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) N/A 20.0 μg/m3 (19) 0.8 μg/m3 (4) 19.0
 
Oct. 17, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A 25.0 μg/m3 (24) 6.1 μg/m3 (26) 26.0
 
Oct. 17, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 26.0 μg/m3 (25) 9.0 μg/m3 (38) 38.0
 
Oct. 17, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 33.0 μg/m3 (31) 6.3 μg/m3 (27) 31.0
 
Oct. 17, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 32.0 μg/m3 (30) 4.8 μg/m3 (20) 30.0
 
Oct. 17, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A 38.0 μg/m3 (36) 5.6 μg/m3 (24) 36.0
 
Oct. 17, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 38.0 μg/m3 (36) 2.9 μg/m3 (13) 36.0
 
Oct. 17, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 24.0 μg/m3 (23) 2.7 μg/m3 (12) 23.0
 
Oct. 17, 2021, midnight N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 29.0 μg/m3 (27) 3.0 μg/m3 (13) 27.0
 
Oct. 16, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 17.0 μg/m3 (16) 4.6 μg/m3 (20) 26.0
 
Oct. 16, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 21.0 μg/m3 (20) 5.4 μg/m3 (23) 29.0
 
Oct. 16, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 15.0 μg/m3 (14) 4.2 μg/m3 (18) 29.0
 
Oct. 16, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 11.0 μg/m3 (11) 7.1 μg/m3 (30) 30.0
 
Oct. 16, 2021, 7 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) 7.3 μg/m3 (31) 31.0
 
Oct. 16, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 15.0 μg/m3 (14) 4.9 μg/m3 (21) 25.0
 
Oct. 16, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 12.0 μg/m3 (12) 5.4 μg/m3 (23) 25.0
 
Oct. 16, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 9.0 μg/m3 (9) 3.9 μg/m3 (17) 25.0
 
Oct. 16, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 8.0 μg/m3 (8) 5.6 μg/m3 (24) 24.0
 
Oct. 16, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 13.0 μg/m3 (13) 5.6 μg/m3 (24) 24.0
 
Oct. 16, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 8.0 μg/m3 (8) 2.7 μg/m3 (12) 13.0
 
Oct. 16, 2021, noon N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 8.0 μg/m3 (8) 1.1 μg/m3 (5) 13.0
 
Oct. 16, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 8.0 μg/m3 (8) 3.4 μg/m3 (15) 15.0
 
Oct. 16, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 50.0 μg/m3 (47) 4.9 μg/m3 (21) 47.0
 
Oct. 16, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 8.0 μg/m3 (8) 3.7 μg/m3 (16) 18.0
 
Oct. 16, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 10.0 μg/m3 (10) 1.5 μg/m3 (7) 19.0
 
Oct. 16, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 11.0 μg/m3 (11) 2.9 μg/m3 (13) 19.0
 
Oct. 16, 2021, 6 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) 5.8 μg/m3 (25) 25.0
 
Oct. 16, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 9.0 μg/m3 (9) 8.8 μg/m3 (37) 37.0
 
Oct. 16, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 19.0 μg/m3 (18) 8.3 μg/m3 (35) 35.0
 
Oct. 16, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 19.0 μg/m3 (18) 6.1 μg/m3 (26) 26.0
 
Oct. 16, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 16.0 μg/m3 (15) 5.4 μg/m3 (23) 23.0
 
Oct. 16, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 10.0 μg/m3 (10) 4.9 μg/m3 (21) 25.0
 
Oct. 16, 2021, midnight N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 16.0 μg/m3 (15) 3.7 μg/m3 (16) 28.0
 
Oct. 15, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 12.0 μg/m3 (12) 5.4 μg/m3 (23) 29.0
 
Oct. 15, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 14.0 μg/m3 (13) 7.8 μg/m3 (33) 33.0
 
Oct. 15, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 19.0 μg/m3 (18) 6.3 μg/m3 (27) 27.0
 
Oct. 15, 2021, 7 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) 8.0 μg/m3 (34) 34.0
 
Oct. 15, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 12.0 μg/m3 (12) 4.1 μg/m3 (18) 25.0
 
Oct. 15, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 15.0 μg/m3 (14) 4.9 μg/m3 (21) 25.0
 
Oct. 15, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 11.0 μg/m3 (11) 2.0 μg/m3 (9) 25.0
 
Oct. 15, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 11.0 μg/m3 (11) 3.7 μg/m3 (16) 24.0
 
Oct. 15, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 10.0 μg/m3 (10) 6.6 μg/m3 (28) 28.0
 
Oct. 15, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 11.0 μg/m3 (11) 6.1 μg/m3 (26) 26.0
 
Oct. 15, 2021, noon N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 5.0 μg/m3 (5) 3.4 μg/m3 (15) 15.0
 
Oct. 15, 2021, 11 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) 3.2 μg/m3 (14) 14.0