ID: 2164

AQSQID: 460290002

Site Name: Watertown

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

Updated: Dec. 2, 2020, 1:42 a.m.

Location: Watertown (3rd Ave Swest), SD

Reporting: True, Located: True

Current AQI: 121.0

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
Dec. 1, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 194.4 μg/m3 (121) 20.0 μg/m3 (68) 121.0
 
Dec. 1, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 115.4 μg/m3 (81) 12.9 μg/m3 (53) 81.0
 
Dec. 1, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 113.5 μg/m3 (80) 8.7 μg/m3 (37) 80.0
 
Dec. 1, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 76.8 μg/m3 (62) 8.0 μg/m3 (34) 62.0
 
Dec. 1, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 48.7 μg/m3 (46) 8.9 μg/m3 (38) 46.0
 
Dec. 1, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 52.7 μg/m3 (49) 6.8 μg/m3 (29) 49.0
 
Dec. 1, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 64.2 μg/m3 (56) 5.6 μg/m3 (24) 56.0
 
Dec. 1, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 50.2 μg/m3 (47) 4.8 μg/m3 (20) 47.0
 
Dec. 1, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 59.9 μg/m3 (54) 4.6 μg/m3 (20) 54.0
 
Dec. 1, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 56.2 μg/m3 (52) 7.0 μg/m3 (30) 52.0
 
Dec. 1, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 42.1 μg/m3 (39) 8.0 μg/m3 (34) 39.0
 
Dec. 1, 2020, noon N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 16.3 μg/m3 (16) 7.5 μg/m3 (32) 32.0
 
Dec. 1, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 14.1 μg/m3 (14) 3.6 μg/m3 (16) 16.0
 
Dec. 1, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 21.9 μg/m3 (21) 4.8 μg/m3 (20) 21.0
 
Dec. 1, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 22.2 μg/m3 (21) 6.3 μg/m3 (27) 27.0
 
Dec. 1, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 27.4 μg/m3 (26) 4.8 μg/m3 (20) 26.0
 
Dec. 1, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 22.2 μg/m3 (21) 4.9 μg/m3 (21) 21.0
 
Dec. 1, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 30.3 μg/m3 (29) 6.8 μg/m3 (29) 29.0
 
Dec. 1, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 30.3 μg/m3 (29) 6.6 μg/m3 (28) 29.0
 
Dec. 1, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 34.4 μg/m3 (32) 8.0 μg/m3 (34) 34.0
 
Dec. 1, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 30.3 μg/m3 (29) 8.4 μg/m3 (36) 36.0
 
Dec. 1, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (12) N/A 39.4 μg/m3 (37) 10.2 μg/m3 (43) 43.0
 
Dec. 1, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 34.6 μg/m3 (33) 5.8 μg/m3 (25) 33.0
 
Dec. 1, 2020, midnight N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 42.8 μg/m3 (40) 8.2 μg/m3 (35) 40.0
 
Nov. 30, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 84.1 μg/m3 (66) 9.2 μg/m3 (39) 66.0
 
Nov. 30, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 103.1 μg/m3 (75) 10.4 μg/m3 (44) 75.0
 
Nov. 30, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 64.1 μg/m3 (56) 6.3 μg/m3 (27) 56.0
 
Nov. 30, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 50.9 μg/m3 (48) 5.1 μg/m3 (22) 48.0
 
Nov. 30, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 67.9 μg/m3 (58) 4.6 μg/m3 (20) 58.0
 
Nov. 30, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 59.6 μg/m3 (54) 6.5 μg/m3 (28) 54.0
 
Nov. 30, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 65.5 μg/m3 (57) 10.7 μg/m3 (45) 57.0
 
Nov. 30, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 93.9 μg/m3 (71) 15.1 μg/m3 (58) 71.0
 
Nov. 30, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (11) N/A 51.4 μg/m3 (48) 7.5 μg/m3 (32) 48.0
 
Nov. 30, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A 37.5 μg/m3 (35) 8.4 μg/m3 (36) 36.0
 
Nov. 30, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 23.9 μg/m3 (23) 4.6 μg/m3 (20) 23.0
 
Nov. 30, 2020, noon N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 10.7 μg/m3 (10) 5.8 μg/m3 (25) 25.0
 
Nov. 30, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 23.9 μg/m3 (23) 6.3 μg/m3 (27) 27.0
 
Nov. 30, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 9.1 μg/m3 (9) 4.1 μg/m3 (18) 18.0
 
Nov. 30, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 7.6 μg/m3 (8) 3.1 μg/m3 (13) 13.0
 
Nov. 30, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A -1.0 ppb (0) N/A 9.8 μg/m3 (10) 2.9 μg/m3 (13) 13.0
 
Nov. 30, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A 12.7 μg/m3 (12) 3.6 μg/m3 (16) 16.0
 
Nov. 30, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (9) N/A 7.6 μg/m3 (8) 5.8 μg/m3 (25) 25.0
 
Nov. 30, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 8.1 μg/m3 (8) 4.6 μg/m3 (20) 20.0
 
Nov. 30, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 5.9 μg/m3 (6) 3.4 μg/m3 (15) 20.0
 
Nov. 30, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 8.1 μg/m3 (8) 3.1 μg/m3 (13) 22.0
 
Nov. 30, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 12.0 μg/m3 (12) 3.1 μg/m3 (13) 25.0
 
Nov. 30, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 5.9 μg/m3 (6) 3.9 μg/m3 (17) 25.0
 
Nov. 30, 2020, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 8.4 μg/m3 (8) 2.0 μg/m3 (9) 25.0
 
Nov. 29, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 6.4 μg/m3 (6) 4.1 μg/m3 (18) 26.0
 
Nov. 29, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 7.9 μg/m3 (8) 3.9 μg/m3 (17) 29.0
 
Nov. 29, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 10.3 μg/m3 (10) 1.0 μg/m3 (5) 30.0
 
Nov. 29, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 9.3 μg/m3 (9) 0.6 μg/m3 (3) 30.0
 
Nov. 29, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (29) N/A 12.4 μg/m3 (12) 3.9 μg/m3 (17) 29.0
 
Nov. 29, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (28) N/A 7.9 μg/m3 (8) 5.8 μg/m3 (25) 28.0
 
Nov. 29, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 8.1 μg/m3 (8) 2.2 μg/m3 (10) 26.0
 
Nov. 29, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 8.6 μg/m3 (8) 4.6 μg/m3 (20) 25.0
 
Nov. 29, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 9.3 μg/m3 (9) 4.8 μg/m3 (20) 26.0
 
Nov. 29, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 11.7 μg/m3 (11) 3.1 μg/m3 (13) 26.0
 
Nov. 29, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 4.0 μg/m3 (4) 4.8 μg/m3 (20) 26.0
 
Nov. 29, 2020, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 23.9 μg/m3 (23) 6.8 μg/m3 (29) 29.0
 
Nov. 29, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 39.7 μg/m3 (37) 4.8 μg/m3 (20) 37.0
 
Nov. 29, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 10.1 μg/m3 (10) 6.5 μg/m3 (28) 28.0
 
Nov. 29, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 38.0 μg/m3 (36) 11.6 μg/m3 (49) 49.0
 
Nov. 29, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (25) N/A 38.5 μg/m3 (36) 7.5 μg/m3 (32) 36.0
 
Nov. 29, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 44.1 μg/m3 (41) 6.8 μg/m3 (29) 41.0
 
Nov. 29, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (27) N/A 15.9 μg/m3 (15) 3.1 μg/m3 (13) 27.0
 
Nov. 29, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (26) N/A 11.0 μg/m3 (11) 1.3 μg/m3 (6) 26.0
 
Nov. 29, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (21) N/A 19.3 μg/m3 (18) 3.2 μg/m3 (14) 21.0
 
Nov. 29, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 33.0 μg/m3 (31) 6.8 μg/m3 (29) 31.0
 
Nov. 29, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 38.7 μg/m3 (36) 8.9 μg/m3 (38) 38.0
 
Nov. 29, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 40.9 μg/m3 (38) 8.7 μg/m3 (37) 38.0
 
Nov. 29, 2020, midnight N/A N/A N/A N/A N/A N/A 13.0 ppb (13) N/A 51.4 μg/m3 (48) 10.9 μg/m3 (46) 48.0
 
Nov. 28, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (13) N/A 60.2 μg/m3 (54) 3.2 μg/m3 (14) 54.0
 
Nov. 28, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 34.7 μg/m3 (33) 3.6 μg/m3 (16) 33.0
 
Nov. 28, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 19.8 μg/m3 (19) 5.1 μg/m3 (22) 24.0
 
Nov. 28, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (25) N/A 20.4 μg/m3 (19) 3.2 μg/m3 (14) 25.0
 
Nov. 28, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (24) N/A 18.7 μg/m3 (18) 4.9 μg/m3 (21) 24.0
 
Nov. 28, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (22) N/A 21.8 μg/m3 (21) 7.0 μg/m3 (30) 30.0
 
Nov. 28, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 13.5 μg/m3 (13) 2.9 μg/m3 (13) 20.0
 
Nov. 28, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 14.2 μg/m3 (14) 3.4 μg/m3 (15) 18.0
 
Nov. 28, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 15.9 μg/m3 (15) 3.1 μg/m3 (13) 15.0
 
Nov. 28, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (10) N/A 26.9 μg/m3 (25) 1.5 μg/m3 (7) 25.0
 
Nov. 28, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A 10.5 μg/m3 (10) 1.7 μg/m3 (8) 10.0
 
Nov. 28, 2020, noon N/A N/A N/A N/A N/A N/A 8.0 ppb (8) N/A 11.9 μg/m3 (12) 3.4 μg/m3 (15) 15.0
 
Nov. 28, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 23.2 μg/m3 (22) 5.3 μg/m3 (23) 23.0
 
Nov. 28, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 8.4 μg/m3 (8) 3.4 μg/m3 (15) 16.0
 
Nov. 28, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 8.6 μg/m3 (8) 4.8 μg/m3 (20) 20.0
 
Nov. 28, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (18) N/A 7.4 μg/m3 (7) 3.4 μg/m3 (15) 18.0
 
Nov. 28, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 6.2 μg/m3 (6) 2.2 μg/m3 (10) 20.0
 
Nov. 28, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 10.3 μg/m3 (10) 2.0 μg/m3 (9) 19.0
 
Nov. 28, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (20) N/A 15.1 μg/m3 (14) 4.8 μg/m3 (20) 20.0
 
Nov. 28, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 39.2 μg/m3 (37) 5.6 μg/m3 (24) 37.0
 
Nov. 28, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 14.7 μg/m3 (14) 2.4 μg/m3 (10) 15.0
 
Nov. 28, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (16) N/A 27.6 μg/m3 (26) 1.3 μg/m3 (6) 26.0
 
Nov. 28, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 22.4 μg/m3 (21) 1.3 μg/m3 (6) 21.0
 
Nov. 28, 2020, midnight N/A N/A N/A N/A N/A N/A 15.0 ppb (14) N/A 28.9 μg/m3 (27) 1.7 μg/m3 (8) 27.0
 
Nov. 27, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (15) N/A 32.0 μg/m3 (30) 2.0 μg/m3 (9) 30.0
 
Nov. 27, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (19) N/A 30.3 μg/m3 (29) 2.2 μg/m3 (10) 29.0
 
Nov. 27, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (6) N/A 15.2 μg/m3 (15) 3.9 μg/m3 (17) 17.0
 
Nov. 27, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A 9.9 μg/m3 (10) 2.7 μg/m3 (12) 12.0
 
Nov. 27, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (7) N/A 9.6 μg/m3 (9) 4.1 μg/m3 (18) 18.0
 
Nov. 27, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) N/A 12.5 μg/m3 (12) 4.8 μg/m3 (20) 20.0
 
Nov. 27, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 12.0 μg/m3 (12) 6.1 μg/m3 (26) 26.0
 
Nov. 27, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 10.1 μg/m3 (10) 9.9 μg/m3 (42) 42.0
 
Nov. 27, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 16.6 μg/m3 (16) 6.5 μg/m3 (28) 28.0
 
Nov. 27, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 32.0 μg/m3 (30) 6.3 μg/m3 (27) 30.0
 
Nov. 27, 2020, noon N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 10.5 μg/m3 (10) 3.8 μg/m3 (16) 16.0
 
Nov. 27, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 7.6 μg/m3 (8) 5.1 μg/m3 (22) 22.0
 
Nov. 27, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 8.1 μg/m3 (8) 3.6 μg/m3 (16) 16.0
 
Nov. 27, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 6.9 μg/m3 (7) 5.1 μg/m3 (22) 22.0
 
Nov. 27, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 5.5 μg/m3 (6) 6.5 μg/m3 (28) 28.0
 
Nov. 27, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 3.8 μg/m3 (4) 1.0 μg/m3 (5) 5.0
 
Nov. 27, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 6.0 μg/m3 (6) -0.1 μg/m3 (0) 6.0
 
Nov. 27, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 7.4 μg/m3 (7) 4.3 μg/m3 (18) 18.0
 
Nov. 27, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 7.9 μg/m3 (8) 7.5 μg/m3 (32) 32.0
 
Nov. 27, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 9.6 μg/m3 (9) 4.4 μg/m3 (19) 19.0
 
Nov. 27, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 8.9 μg/m3 (9) 5.6 μg/m3 (24) 24.0
 
Nov. 27, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 14.4 μg/m3 (14) 7.8 μg/m3 (33) 33.0
 
Nov. 27, 2020, midnight N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 10.5 μg/m3 (10) 4.6 μg/m3 (20) 20.0
 
Nov. 26, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 9.6 μg/m3 (9) 6.8 μg/m3 (29) 29.0
 
Nov. 26, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 11.0 μg/m3 (11) 9.5 μg/m3 (40) 40.0
 
Nov. 26, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A 13.2 μg/m3 (13) 10.0 μg/m3 (42) 42.0
 
Nov. 26, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) N/A 8.1 μg/m3 (8) 3.4 μg/m3 (15) 15.0
 
Nov. 26, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (5) N/A 6.7 μg/m3 (7) 5.8 μg/m3 (25) 25.0
 
Nov. 26, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A 6.9 μg/m3 (7) 7.5 μg/m3 (32) 32.0
 
Nov. 26, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A 9.6 μg/m3 (9) 8.0 μg/m3 (34) 34.0
 
Nov. 26, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 11.7 μg/m3 (11) 11.9 μg/m3 (50) 50.0
 
Nov. 26, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 9.6 μg/m3 (9) 7.5 μg/m3 (32) 32.0
 
Nov. 26, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 11.0 μg/m3 (11) 8.5 μg/m3 (36) 36.0
 
Nov. 26, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 11.7 μg/m3 (11) 7.5 μg/m3 (32) 32.0
 
Nov. 26, 2020, noon N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 10.0 μg/m3 (10) 9.2 μg/m3 (39) 39.0
 
Nov. 26, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 10.3 μg/m3 (10) 6.8 μg/m3 (29) 29.0
 
Nov. 26, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 14.4 μg/m3 (14) 8.9 μg/m3 (38) 38.0
 
Nov. 26, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 11.2 μg/m3 (11) 8.5 μg/m3 (36) 36.0
 
Nov. 26, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 8.1 μg/m3 (8) 9.9 μg/m3 (42) 42.0
 
Nov. 26, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 7.9 μg/m3 (8) 8.9 μg/m3 (38) 38.0
 
Nov. 26, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 9.6 μg/m3 (9) 8.4 μg/m3 (36) 36.0
 
Nov. 26, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 44.5 μg/m3 (42) 9.4 μg/m3 (40) 42.0
 
Nov. 26, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A 6.7 μg/m3 (7) 3.1 μg/m3 (13) 13.0
 
Nov. 26, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A 6.6 μg/m3 (7) 3.6 μg/m3 (16) 16.0
 
Nov. 26, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A 40.7 μg/m3 (38) 4.1 μg/m3 (18) 38.0
 
Nov. 26, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A 11.7 μg/m3 (11) 5.3 μg/m3 (23) 23.0
 
Nov. 26, 2020, midnight N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A 13.7 μg/m3 (13) 8.2 μg/m3 (35) 35.0
 
Nov. 25, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 18.6 μg/m3 (18) 6.5 μg/m3 (28) 28.0
 
Nov. 25, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 62.6 μg/m3 (55) 9.4 μg/m3 (40) 55.0
 
Nov. 25, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A 52.6 μg/m3 (49) 10.9 μg/m3 (46) 49.0
 
Nov. 25, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (4) N/A 52.4 μg/m3 (49) 14.4 μg/m3 (56) 56.0
 
Nov. 25, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (3) N/A 50.2 μg/m3 (47) 9.9 μg/m3 (42) 47.0
 
Nov. 25, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 61.6 μg/m3 (55) 4.4 μg/m3 (19) 55.0
 
Nov. 25, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 25.6 μg/m3 (24) 7.0 μg/m3 (30) 30.0
 
Nov. 25, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 21.1 μg/m3 (20) 10.4 μg/m3 (44) 44.0
 
Nov. 25, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 18.4 μg/m3 (18) 8.2 μg/m3 (35) 35.0
 
Nov. 25, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 23.2 μg/m3 (22) 6.5 μg/m3 (28) 28.0
 
Nov. 25, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 12.0 μg/m3 (12) 9.2 μg/m3 (39) 39.0
 
Nov. 25, 2020, noon N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 14.4 μg/m3 (14) 8.7 μg/m3 (37) 37.0
 
Nov. 25, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 9.1 μg/m3 (9) 8.0 μg/m3 (34) 34.0
 
Nov. 25, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 8.4 μg/m3 (8) 9.2 μg/m3 (39) 39.0
 
Nov. 25, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 9.6 μg/m3 (9) 7.3 μg/m3 (31) 31.0
 
Nov. 25, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 12.0 μg/m3 (12) 8.7 μg/m3 (37) 37.0
 
Nov. 25, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 13.0 μg/m3 (13) 9.9 μg/m3 (42) 42.0
 
Nov. 25, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 9.6 μg/m3 (9) 8.9 μg/m3 (38) 38.0
 
Nov. 25, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 9.9 μg/m3 (10) 12.4 μg/m3 (52) 52.0
 
Nov. 25, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 12.7 μg/m3 (12) 7.0 μg/m3 (30) 30.0
 
Nov. 25, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 11.7 μg/m3 (11) 8.7 μg/m3 (37) 37.0
 
Nov. 25, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 15.4 μg/m3 (15) 11.9 μg/m3 (50) 50.0
 
Nov. 25, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 19.8 μg/m3 (19) 11.4 μg/m3 (48) 48.0
 
Nov. 25, 2020, midnight N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 13.9 μg/m3 (13) 13.6 μg/m3 (55) 55.0
 
Nov. 24, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 11.5 μg/m3 (11) 8.9 μg/m3 (38) 38.0