ID: 2164

AQSQID: 460290002

Site Name: Watertown

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

Updated: Sept. 21, 2020, 2:38 p.m.

Location: Watertown (3rd Ave Swest), SD

Reporting: True, Located: True

Current AQI: 74.0

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
Sept. 21, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 102.0 μg/m3 (74) 18.8 μg/m3 (64) 74.0
 
Sept. 21, 2020, noon N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 80.0 μg/m3 (62) 23.4 μg/m3 (74) 74.0
 
Sept. 21, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 41.0 μg/m3 (37) 19.9 μg/m3 (67) 67.0
 
Sept. 21, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 47.0 μg/m3 (43) 21.0 μg/m3 (69) 69.0
 
Sept. 21, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 51.0 μg/m3 (46) 22.2 μg/m3 (72) 72.0
 
Sept. 21, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 48.0 μg/m3 (44) 24.7 μg/m3 (77) 77.0
 
Sept. 21, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 47.0 μg/m3 (43) 25.2 μg/m3 (78) 78.0
 
Sept. 21, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 56.0 μg/m3 (50) 20.6 μg/m3 (68) 68.0
 
Sept. 21, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 57.0 μg/m3 (51) 27.7 μg/m3 (83) 83.0
 
Sept. 21, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 54.0 μg/m3 (49) 27.2 μg/m3 (82) 82.0
 
Sept. 21, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 52.0 μg/m3 (47) 23.5 μg/m3 (74) 74.0
 
Sept. 21, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 50.0 μg/m3 (45) 24.5 μg/m3 (77) 77.0
 
Sept. 21, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 76.0 μg/m3 (60) 27.7 μg/m3 (83) 83.0
 
Sept. 21, 2020, midnight N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 53.0 μg/m3 (48) 21.8 μg/m3 (71) 71.0
 
Sept. 20, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 53.0 μg/m3 (48) 25.7 μg/m3 (79) 79.0
 
Sept. 20, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 73.0 μg/m3 (59) 22.5 μg/m3 (72) 72.0
 
Sept. 20, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 76.0 μg/m3 (60) 24.2 μg/m3 (76) 76.0
 
Sept. 20, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 61.0 μg/m3 (53) 20.1 μg/m3 (67) 67.0
 
Sept. 20, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 69.0 μg/m3 (57) 23.7 μg/m3 (75) 75.0
 
Sept. 20, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 74.0 μg/m3 (60) 19.9 μg/m3 (67) 67.0
 
Sept. 20, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 80.0 μg/m3 (62) 24.2 μg/m3 (76) 76.0
 
Sept. 20, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 107.0 μg/m3 (76) 23.0 μg/m3 (73) 76.0
 
Sept. 20, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 107.0 μg/m3 (76) 16.6 μg/m3 (60) 76.0
 
Sept. 20, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 89.0 μg/m3 (67) 17.4 μg/m3 (61) 67.0
 
Sept. 20, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 54.0 μg/m3 (49) 13.4 μg/m3 (53) 53.0
 
Sept. 20, 2020, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 28.0 μg/m3 (25) 13.4 μg/m3 (53) 53.0
 
Sept. 20, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 34.0 μg/m3 (31) 11.2 μg/m3 (47) 47.0
 
Sept. 20, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 27.0 μg/m3 (25) 10.0 μg/m3 (42) 42.0
 
Sept. 20, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 31.0 μg/m3 (28) 14.4 μg/m3 (55) 55.0
 
Sept. 20, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 38.0 μg/m3 (35) 14.9 μg/m3 (56) 56.0
 
Sept. 20, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 34.0 μg/m3 (31) 11.7 μg/m3 (49) 49.0
 
Sept. 20, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 40.0 μg/m3 (36) 11.9 μg/m3 (50) 50.0
 
Sept. 20, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 62.0 μg/m3 (54) 13.7 μg/m3 (54) 54.0
 
Sept. 20, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 54.0 μg/m3 (49) 11.5 μg/m3 (48) 49.0
 
Sept. 20, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 69.0 μg/m3 (57) 14.9 μg/m3 (56) 57.0
 
Sept. 20, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 80.0 μg/m3 (62) 13.4 μg/m3 (53) 62.0
 
Sept. 20, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 74.0 μg/m3 (60) 16.4 μg/m3 (59) 60.0
 
Sept. 20, 2020, midnight N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 115.0 μg/m3 (80) 18.1 μg/m3 (63) 80.0
 
Sept. 19, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 95.0 μg/m3 (70) 17.9 μg/m3 (63) 70.0
 
Sept. 19, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 100.0 μg/m3 (72) 16.6 μg/m3 (60) 72.0
 
Sept. 19, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 108.0 μg/m3 (76) 13.4 μg/m3 (53) 76.0
 
Sept. 19, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 178.0 μg/m3 (112) 15.3 μg/m3 (57) 112.0
 
Sept. 19, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 143.0 μg/m3 (94) 16.9 μg/m3 (60) 94.0
 
Sept. 19, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 189.0 μg/m3 (117) 13.9 μg/m3 (54) 117.0
 
Sept. 19, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 191.0 μg/m3 (118) 11.0 μg/m3 (46) 118.0
 
Sept. 19, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 110.0 μg/m3 (78) 13.9 μg/m3 (54) 78.0
 
Sept. 19, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 99.0 μg/m3 (72) 11.9 μg/m3 (50) 72.0
 
Sept. 19, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 68.0 μg/m3 (56) 8.8 μg/m3 (37) 56.0
 
Sept. 19, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 66.0 μg/m3 (56) 10.2 μg/m3 (42) 56.0
 
Sept. 19, 2020, noon N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 42.0 μg/m3 (38) 7.8 μg/m3 (32) 38.0
 
Sept. 19, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 46.0 μg/m3 (42) 6.8 μg/m3 (28) 42.0
 
Sept. 19, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 38.0 μg/m3 (35) 8.0 μg/m3 (33) 35.0
 
Sept. 19, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 32.0 μg/m3 (29) 9.2 μg/m3 (38) 38.0
 
Sept. 19, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 32.0 μg/m3 (29) 9.0 μg/m3 (38) 38.0
 
Sept. 19, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 37.0 μg/m3 (34) 12.1 μg/m3 (50) 50.0
 
Sept. 19, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 32.0 μg/m3 (29) 7.8 μg/m3 (32) 32.0
 
Sept. 19, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 53.0 μg/m3 (48) 7.6 μg/m3 (32) 48.0
 
Sept. 19, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 61.0 μg/m3 (53) 8.5 μg/m3 (35) 53.0
 
Sept. 19, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 52.0 μg/m3 (47) 9.0 μg/m3 (38) 47.0
 
Sept. 19, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 75.0 μg/m3 (60) 8.6 μg/m3 (36) 60.0
 
Sept. 19, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 50.0 μg/m3 (45) 9.8 μg/m3 (41) 45.0
 
Sept. 19, 2020, midnight N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 58.0 μg/m3 (52) 7.6 μg/m3 (32) 52.0
 
Sept. 18, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 63.0 μg/m3 (54) 7.3 μg/m3 (30) 54.0
 
Sept. 18, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 191.0 μg/m3 (118) 10.5 μg/m3 (44) 118.0
 
Sept. 18, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 127.0 μg/m3 (86) 10.7 μg/m3 (45) 86.0
 
Sept. 18, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 149.0 μg/m3 (97) 10.7 μg/m3 (45) 97.0
 
Sept. 18, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 163.0 μg/m3 (104) 8.3 μg/m3 (35) 104.0
 
Sept. 18, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 108.0 μg/m3 (76) 10.3 μg/m3 (43) 76.0
 
Sept. 18, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 99.0 μg/m3 (72) 8.1 μg/m3 (34) 72.0
 
Sept. 18, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 72.0 μg/m3 (58) 8.3 μg/m3 (35) 58.0
 
Sept. 18, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 71.0 μg/m3 (58) 3.2 μg/m3 (13) 58.0
 
Sept. 18, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 69.0 μg/m3 (57) 5.1 μg/m3 (21) 57.0
 
Sept. 18, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A 73.0 μg/m3 (59) 7.1 μg/m3 (30) 59.0
 
Sept. 18, 2020, noon N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A 63.0 μg/m3 (54) 7.8 μg/m3 (32) 54.0
 
Sept. 18, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A 24.0 μg/m3 (22) 5.4 μg/m3 (23) 23.0
 
Sept. 18, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 40.0 μg/m3 (36) 5.8 μg/m3 (24) 36.0
 
Sept. 18, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 17.0 μg/m3 (15) 7.1 μg/m3 (30) 30.0
 
Sept. 18, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 19.0 μg/m3 (17) 5.1 μg/m3 (21) 21.0
 
Sept. 18, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A 21.0 μg/m3 (19) 6.3 μg/m3 (26) 26.0
 
Sept. 18, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 55.0 μg/m3 (50) 9.7 μg/m3 (40) 50.0
 
Sept. 18, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 28.0 μg/m3 (25) 6.6 μg/m3 (28) 28.0
 
Sept. 18, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 32.0 μg/m3 (29) 7.3 μg/m3 (30) 30.0
 
Sept. 18, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 28.0 μg/m3 (25) 6.8 μg/m3 (28) 28.0
 
Sept. 18, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 25.0 μg/m3 (23) 11.4 μg/m3 (48) 48.0
 
Sept. 18, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 26.0 μg/m3 (24) 6.6 μg/m3 (28) 28.0
 
Sept. 18, 2020, midnight N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 27.0 μg/m3 (25) 5.1 μg/m3 (21) 25.0
 
Sept. 17, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 23.0 μg/m3 (21) 5.4 μg/m3 (23) 23.0
 
Sept. 17, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 32.0 μg/m3 (29) 1.8 μg/m3 (8) 29.0
 
Sept. 17, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 33.0 μg/m3 (30) 2.3 μg/m3 (10) 30.0
 
Sept. 17, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 22.0 μg/m3 (20) 3.7 μg/m3 (15) 22.0
 
Sept. 17, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 30.0 μg/m3 (27) 3.7 μg/m3 (15) 27.0
 
Sept. 17, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 51.0 μg/m3 (46) 4.4 μg/m3 (18) 46.0
 
Sept. 17, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 66.0 μg/m3 (56) 7.3 μg/m3 (30) 56.0
 
Sept. 17, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 62.0 μg/m3 (54) 4.2 μg/m3 (18) 54.0
 
Sept. 17, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 47.0 μg/m3 (43) 4.4 μg/m3 (18) 43.0
 
Sept. 17, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 76.0 μg/m3 (60) 4.9 μg/m3 (20) 60.0
 
Sept. 17, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A 126.0 μg/m3 (86) 15.9 μg/m3 (58) 86.0
 
Sept. 17, 2020, noon N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A 70.0 μg/m3 (58) 7.1 μg/m3 (30) 58.0
 
Sept. 17, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A 22.0 μg/m3 (20) 6.1 μg/m3 (25) 25.0
 
Sept. 17, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A 15.0 μg/m3 (14) 3.7 μg/m3 (15) 15.0
 
Sept. 17, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A 14.0 μg/m3 (13) 5.6 μg/m3 (23) 23.0
 
Sept. 17, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A 11.0 μg/m3 (10) 8.0 μg/m3 (33) 33.0
 
Sept. 17, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A 22.0 μg/m3 (20) 9.0 μg/m3 (38) 38.0
 
Sept. 17, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) N/A 22.0 μg/m3 (20) 5.1 μg/m3 (21) 21.0
 
Sept. 17, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A 18.0 μg/m3 (16) 3.9 μg/m3 (16) 16.0
 
Sept. 17, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A 29.0 μg/m3 (26) 3.2 μg/m3 (13) 26.0
 
Sept. 17, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A 39.0 μg/m3 (35) 6.3 μg/m3 (26) 35.0
 
Sept. 17, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 24.0 μg/m3 (22) 8.8 μg/m3 (37) 37.0
 
Sept. 17, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 22.0 μg/m3 (20) 5.4 μg/m3 (23) 23.0
 
Sept. 17, 2020, midnight N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 18.0 μg/m3 (16) 5.4 μg/m3 (23) 23.0
 
Sept. 16, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 14.0 μg/m3 (13) 4.6 μg/m3 (19) 19.0
 
Sept. 16, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 19.0 μg/m3 (17) 5.4 μg/m3 (23) 23.0
 
Sept. 16, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 42.0 μg/m3 (38) 4.4 μg/m3 (18) 38.0
 
Sept. 16, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 45.0 μg/m3 (41) 6.9 μg/m3 (29) 41.0
 
Sept. 16, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 33.0 μg/m3 (30) 7.4 μg/m3 (31) 31.0
 
Sept. 16, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 43.0 μg/m3 (39) 7.6 μg/m3 (32) 39.0
 
Sept. 16, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 42.0 μg/m3 (38) 7.8 μg/m3 (32) 38.0
 
Sept. 16, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A 39.0 μg/m3 (35) 5.1 μg/m3 (21) 35.0
 
Sept. 16, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 27.0 μg/m3 (25) 5.4 μg/m3 (23) 25.0
 
Sept. 16, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A 24.0 μg/m3 (22) 6.8 μg/m3 (28) 28.0
 
Sept. 16, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A 33.0 μg/m3 (30) 7.6 μg/m3 (32) 32.0
 
Sept. 16, 2020, noon N/A N/A N/A N/A N/A N/A 6.0 ppb (5) N/A 26.0 μg/m3 (24) 5.1 μg/m3 (21) 24.0
 
Sept. 16, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A 29.0 μg/m3 (26) 4.1 μg/m3 (17) 26.0
 
Sept. 16, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A 22.0 μg/m3 (20) 4.4 μg/m3 (18) 20.0
 
Sept. 16, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A 19.0 μg/m3 (17) 4.6 μg/m3 (19) 19.0
 
Sept. 16, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) N/A 15.0 μg/m3 (14) 4.2 μg/m3 (18) 18.0
 
Sept. 16, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A 18.0 μg/m3 (16) 3.0 μg/m3 (12) 16.0
 
Sept. 16, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A 17.0 μg/m3 (15) 3.5 μg/m3 (15) 15.0
 
Sept. 16, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) N/A 22.0 μg/m3 (20) 3.7 μg/m3 (15) 20.0
 
Sept. 16, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) N/A 22.0 μg/m3 (20) 6.9 μg/m3 (29) 29.0
 
Sept. 16, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 28.0 μg/m3 (25) 8.3 μg/m3 (35) 35.0
 
Sept. 16, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 38.0 μg/m3 (35) 7.4 μg/m3 (31) 35.0
 
Sept. 16, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 44.0 μg/m3 (40) 8.1 μg/m3 (34) 40.0
 
Sept. 16, 2020, midnight N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 33.0 μg/m3 (30) 8.1 μg/m3 (34) 34.0
 
Sept. 15, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 29.0 μg/m3 (26) 6.4 μg/m3 (27) 27.0
 
Sept. 15, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 37.0 μg/m3 (34) 5.4 μg/m3 (23) 34.0
 
Sept. 15, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 34.0 μg/m3 (31) 5.7 μg/m3 (24) 31.0
 
Sept. 15, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 31.0 μg/m3 (28) 8.3 μg/m3 (35) 35.0
 
Sept. 15, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 31.0 μg/m3 (28) 7.9 μg/m3 (33) 33.0
 
Sept. 15, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 30.0 μg/m3 (27) 7.1 μg/m3 (30) 30.0
 
Sept. 15, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 24.0 μg/m3 (22) 5.9 μg/m3 (25) 25.0
 
Sept. 15, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 25.0 μg/m3 (23) 5.7 μg/m3 (24) 24.0
 
Sept. 15, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 26.0 μg/m3 (24) 6.4 μg/m3 (27) 27.0
 
Sept. 15, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 49.0 μg/m3 (45) 5.6 μg/m3 (23) 45.0
 
Sept. 15, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 43.0 μg/m3 (39) 5.4 μg/m3 (23) 39.0
 
Sept. 15, 2020, noon N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 18.0 μg/m3 (16) 4.4 μg/m3 (18) 23.0
 
Sept. 15, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 21.0 μg/m3 (19) 4.9 μg/m3 (20) 25.0
 
Sept. 15, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 19.0 μg/m3 (17) 3.7 μg/m3 (15) 26.0
 
Sept. 15, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 17.0 μg/m3 (15) 4.9 μg/m3 (20) 27.0
 
Sept. 15, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 18.0 μg/m3 (16) 6.1 μg/m3 (25) 27.0
 
Sept. 15, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 23.0 μg/m3 (21) 4.2 μg/m3 (18) 27.0
 
Sept. 15, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 19.0 μg/m3 (17) 4.4 μg/m3 (18) 28.0
 
Sept. 15, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 21.0 μg/m3 (19) 8.8 μg/m3 (37) 37.0
 
Sept. 15, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 22.0 μg/m3 (20) 8.8 μg/m3 (37) 37.0
 
Sept. 15, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 25.0 μg/m3 (23) 6.1 μg/m3 (25) 28.0
 
Sept. 15, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 21.0 μg/m3 (19) 5.4 μg/m3 (23) 26.0
 
Sept. 15, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 31.0 μg/m3 (28) 6.4 μg/m3 (27) 29.0
 
Sept. 15, 2020, midnight N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 32.0 μg/m3 (29) 4.2 μg/m3 (18) 30.0
 
Sept. 14, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 36.0 μg/m3 (33) 2.7 μg/m3 (11) 33.0
 
Sept. 14, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 46.0 μg/m3 (42) 5.4 μg/m3 (23) 42.0
 
Sept. 14, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 69.0 μg/m3 (57) 5.7 μg/m3 (24) 57.0
 
Sept. 14, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 52.0 μg/m3 (47) 7.1 μg/m3 (30) 47.0
 
Sept. 14, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 34.0 μg/m3 (31) 8.3 μg/m3 (35) 35.0
 
Sept. 14, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 42.0 μg/m3 (38) 7.4 μg/m3 (31) 38.0
 
Sept. 14, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 41.0 μg/m3 (37) 7.6 μg/m3 (32) 37.0
 
Sept. 14, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 34.0 μg/m3 (31) 7.3 μg/m3 (30) 31.0
 
Sept. 14, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 19.0 μg/m3 (17) 5.6 μg/m3 (23) 23.0
 
Sept. 14, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A 11.0 μg/m3 (10) 5.4 μg/m3 (23) 23.0