ID: 2164

AQSQID: 460290002

Site Name: Watertown

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

Updated: May 29, 2020, 6:32 p.m.

Location: Watertown (3rd Ave Swest), SD

Reporting: True, Located: True

Current AQI: 20.0

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
May 22, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 24.0 μg/m3 (22) 13.4 μg/m3 (53) 53.0
 
May 22, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 21.0 μg/m3 (19) 5.9 μg/m3 (25) 25.0
 
May 22, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A 23.0 μg/m3 (21) 9.7 μg/m3 (40) 40.0
 
May 22, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 17.0 μg/m3 (15) 6.8 μg/m3 (28) 28.0
 
May 22, 2020, noon N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 16.0 μg/m3 (15) 3.2 μg/m3 (13) 15.0
 
May 22, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A 10.0 μg/m3 (9) 2.0 μg/m3 (8) 10.0
 
May 22, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A 10.0 μg/m3 (9) 3.9 μg/m3 (16) 16.0
 
May 22, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A 9.0 μg/m3 (8) 1.8 μg/m3 (8) 13.0
 
May 22, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 10.0 μg/m3 (9) 1.8 μg/m3 (8) 15.0
 
May 22, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 12.0 μg/m3 (11) 3.2 μg/m3 (13) 16.0
 
May 22, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 10.0 μg/m3 (9) 4.9 μg/m3 (20) 20.0
 
May 22, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 12.0 μg/m3 (11) 5.4 μg/m3 (23) 23.0
 
May 22, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 14.0 μg/m3 (13) 4.9 μg/m3 (20) 20.0
 
May 22, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 7.0 μg/m3 (6) 5.6 μg/m3 (23) 23.0
 
May 22, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 9.0 μg/m3 (8) 3.9 μg/m3 (16) 19.0
 
May 22, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 11.0 μg/m3 (10) 4.9 μg/m3 (20) 20.0
 
May 22, 2020, midnight N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 14.0 μg/m3 (13) 6.1 μg/m3 (25) 25.0
 
May 21, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 70.0 μg/m3 (58) 6.9 μg/m3 (29) 58.0
 
May 21, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 85.0 μg/m3 (65) 12.3 μg/m3 (51) 65.0
 
May 21, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 77.0 μg/m3 (61) 11.5 μg/m3 (48) 61.0
 
May 21, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 99.0 μg/m3 (72) 9.1 μg/m3 (38) 72.0
 
May 21, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 70.0 μg/m3 (58) 6.9 μg/m3 (29) 58.0
 
May 21, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 108.0 μg/m3 (76) 6.6 μg/m3 (28) 76.0
 
May 21, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 84.0 μg/m3 (64) 7.6 μg/m3 (32) 64.0
 
May 21, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 66.0 μg/m3 (56) 2.7 μg/m3 (11) 56.0
 
May 21, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 55.0 μg/m3 (50) 5.1 μg/m3 (21) 50.0
 
May 21, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 71.0 μg/m3 (58) 7.8 μg/m3 (32) 58.0
 
May 21, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 52.0 μg/m3 (47) 5.3 μg/m3 (22) 47.0
 
May 21, 2020, noon N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 43.0 μg/m3 (39) 6.6 μg/m3 (28) 39.0
 
May 21, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 29.0 μg/m3 (26) 8.7 μg/m3 (36) 36.0
 
May 21, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A 12.0 μg/m3 (11) 5.3 μg/m3 (22) 22.0
 
May 21, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A 9.0 μg/m3 (8) 4.6 μg/m3 (19) 19.0
 
May 21, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 2.0 μg/m3 (2) 4.4 μg/m3 (18) 20.0
 
May 21, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 4.0 μg/m3 (4) 5.8 μg/m3 (24) 24.0
 
May 21, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 5.0 μg/m3 (5) 3.9 μg/m3 (16) 22.0
 
May 21, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 17.0 μg/m3 (15) 4.4 μg/m3 (18) 23.0
 
May 21, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 23.0 μg/m3 (21) 7.3 μg/m3 (30) 30.0
 
May 21, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 31.0 μg/m3 (28) 4.2 μg/m3 (18) 28.0
 
May 21, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 30.0 μg/m3 (27) 3.9 μg/m3 (16) 27.0
 
May 21, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 25.0 μg/m3 (23) 3.3 μg/m3 (14) 24.0
 
May 21, 2020, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 40.0 μg/m3 (36) 2.1 μg/m3 (9) 36.0
 
May 20, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 38.0 μg/m3 (35) 3.1 μg/m3 (13) 35.0
 
May 20, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 104.0 μg/m3 (74) 5.7 μg/m3 (24) 74.0
 
May 20, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 99.0 μg/m3 (72) 7.3 μg/m3 (30) 72.0
 
May 20, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 102.0 μg/m3 (74) 8.3 μg/m3 (35) 74.0
 
May 20, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 112.0 μg/m3 (78) 9.7 μg/m3 (40) 78.0
 
May 20, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 58.0 μg/m3 (52) 11.2 μg/m3 (47) 52.0
 
May 20, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 65.0 μg/m3 (55) 5.8 μg/m3 (24) 55.0
 
May 20, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 38.0 μg/m3 (35) 6.8 μg/m3 (28) 35.0
 
May 20, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 41.0 μg/m3 (37) 6.3 μg/m3 (26) 37.0
 
May 20, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 29.0 μg/m3 (26) 5.8 μg/m3 (24) 26.0
 
May 20, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 25.0 μg/m3 (23) 7.3 μg/m3 (30) 30.0
 
May 20, 2020, noon N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 31.0 μg/m3 (28) 7.8 μg/m3 (32) 32.0
 
May 20, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 11.0 μg/m3 (10) 3.9 μg/m3 (16) 19.0
 
May 20, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 10.0 μg/m3 (9) 3.9 μg/m3 (16) 23.0
 
May 20, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 6.0 μg/m3 (5) 3.4 μg/m3 (14) 25.0
 
May 20, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 4.0 μg/m3 (4) 5.1 μg/m3 (21) 25.0
 
May 20, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 6.0 μg/m3 (5) 5.6 μg/m3 (23) 25.0
 
May 20, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 8.0 μg/m3 (7) 5.9 μg/m3 (25) 25.0
 
May 20, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 11.0 μg/m3 (10) 6.6 μg/m3 (28) 28.0
 
May 20, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 10.0 μg/m3 (9) 6.6 μg/m3 (28) 28.0
 
May 20, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 24.0 μg/m3 (22) 4.7 μg/m3 (20) 23.0
 
May 20, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 19.0 μg/m3 (17) 5.7 μg/m3 (24) 24.0
 
May 20, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 31.0 μg/m3 (28) 7.4 μg/m3 (31) 31.0
 
May 20, 2020, midnight N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 51.0 μg/m3 (46) 7.6 μg/m3 (32) 46.0
 
May 19, 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) 6.0 μg/m3 (25) 33.0
 
May 19, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 54.0 μg/m3 (49) 6.0 μg/m3 (25) 49.0
 
May 19, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 57.0 μg/m3 (51) 5.5 μg/m3 (23) 51.0
 
May 19, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 41.0 μg/m3 (37) 6.5 μg/m3 (27) 37.0
 
May 19, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 51.0 μg/m3 (46) 4.7 μg/m3 (20) 46.0
 
May 19, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 29.0 μg/m3 (26) 4.5 μg/m3 (19) 28.0
 
May 19, 2020, 5 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) 6.2 μg/m3 (26) 34.0
 
May 19, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 27.0 μg/m3 (25) 7.8 μg/m3 (32) 32.0
 
May 19, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 49.0 μg/m3 (45) 7.3 μg/m3 (30) 45.0
 
May 19, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 41.0 μg/m3 (37) 7.3 μg/m3 (30) 37.0
 
May 19, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 32.0 μg/m3 (29) 12.4 μg/m3 (51) 51.0
 
May 19, 2020, noon N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A 20.0 μg/m3 (18) 7.3 μg/m3 (30) 30.0
 
May 19, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 14.0 μg/m3 (13) 6.3 μg/m3 (26) 26.0
 
May 19, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 11.0 μg/m3 (10) 4.9 μg/m3 (20) 20.0
 
May 19, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 8.0 μg/m3 (7) 4.1 μg/m3 (17) 17.0
 
May 19, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A 8.0 μg/m3 (7) 6.8 μg/m3 (28) 28.0
 
May 19, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 11.0 μg/m3 (10) 4.9 μg/m3 (20) 20.0
 
May 19, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 10.0 μg/m3 (9) 3.2 μg/m3 (13) 21.0
 
May 19, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 12.0 μg/m3 (11) 2.2 μg/m3 (9) 23.0
 
May 19, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 10.0 μg/m3 (9) 2.5 μg/m3 (10) 25.0
 
May 19, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 14.0 μg/m3 (13) 4.2 μg/m3 (18) 27.0
 
May 19, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A 20.0 μg/m3 (18) 6.4 μg/m3 (27) 28.0
 
May 19, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 19.0 μg/m3 (17) 2.6 μg/m3 (11) 34.0
 
May 19, 2020, midnight N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 10.0 μg/m3 (9) 2.1 μg/m3 (9) 39.0
 
May 18, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 18.0 μg/m3 (16) 0.7 μg/m3 (3) 42.0
 
May 18, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A 13.0 μg/m3 (12) 1.4 μg/m3 (6) 43.0
 
May 18, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A 9.0 μg/m3 (8) 4.2 μg/m3 (18) 42.0
 
May 18, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A 10.0 μg/m3 (9) 4.4 μg/m3 (18) 41.0
 
May 18, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 13.0 μg/m3 (12) 3.3 μg/m3 (14) 38.0
 
May 18, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 11.0 μg/m3 (10) 7.1 μg/m3 (30) 38.0
 
May 18, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 11.0 μg/m3 (10) 8.0 μg/m3 (33) 35.0
 
May 18, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 8.0 μg/m3 (7) 4.4 μg/m3 (18) 32.0
 
May 18, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 13.0 μg/m3 (12) 3.2 μg/m3 (13) 31.0
 
May 18, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 9.0 μg/m3 (8) 5.1 μg/m3 (21) 28.0
 
May 18, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 5.0 μg/m3 (5) 7.8 μg/m3 (32) 32.0
 
May 18, 2020, noon N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A 6.0 μg/m3 (5) 5.3 μg/m3 (22) 22.0
 
May 18, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A 6.0 μg/m3 (5) 4.4 μg/m3 (18) 18.0
 
May 18, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 8.0 μg/m3 (7) 2.9 μg/m3 (12) 19.0
 
May 18, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 6.0 μg/m3 (5) 3.9 μg/m3 (16) 21.0
 
May 18, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 7.0 μg/m3 (6) 5.3 μg/m3 (22) 26.0
 
May 18, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 6.0 μg/m3 (5) 0.3 μg/m3 (1) 28.0
 
May 18, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 4.0 μg/m3 (4) 2.0 μg/m3 (8) 30.0
 
May 18, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 5.0 μg/m3 (5) 2.7 μg/m3 (11) 31.0
 
May 18, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 7.0 μg/m3 (6) 2.2 μg/m3 (9) 30.0
 
May 18, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 6.0 μg/m3 (5) 1.5 μg/m3 (6) 30.0
 
May 18, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 8.0 μg/m3 (7) 2.0 μg/m3 (8) 31.0
 
May 18, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A 8.0 μg/m3 (7) 5.4 μg/m3 (23) 32.0
 
May 18, 2020, midnight N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 8.0 μg/m3 (7) 7.1 μg/m3 (30) 35.0
 
May 17, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 6.0 μg/m3 (5) 1.1 μg/m3 (5) 38.0
 
May 17, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 8.0 μg/m3 (7) 3.4 μg/m3 (14) 35.0
 
May 17, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 6.0 μg/m3 (5) 6.6 μg/m3 (28) 34.0
 
May 17, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 4.0 μg/m3 (4) 5.1 μg/m3 (21) 35.0
 
May 17, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 2.0 μg/m3 (2) 0.1 μg/m3 (0) 36.0
 
May 17, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A 7.0 μg/m3 (6) 2.5 μg/m3 (10) 36.0
 
May 17, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 12.0 μg/m3 (11) 3.4 μg/m3 (14) 34.0
 
May 17, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A 8.0 μg/m3 (7) 1.1 μg/m3 (5) 31.0
 
May 17, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 5.0 μg/m3 (5) 3.4 μg/m3 (14) 27.0
 
May 17, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 3.0 μg/m3 (3) 6.3 μg/m3 (26) 26.0
 
May 17, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 4.0 μg/m3 (4) 5.1 μg/m3 (21) 24.0
 
May 17, 2020, noon N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 7.0 μg/m3 (6) 1.1 μg/m3 (5) 24.0
 
May 17, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 6.0 μg/m3 (5) -0.1 μg/m3 (0) 23.0
 
May 17, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A 6.0 μg/m3 (5) 3.9 μg/m3 (16) 22.0
 
May 17, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 9.0 μg/m3 (8) 8.0 μg/m3 (33) 33.0
 
May 17, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A 10.0 μg/m3 (9) 5.3 μg/m3 (22) 22.0
 
May 17, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A 7.0 μg/m3 (6) 2.9 μg/m3 (12) 21.0
 
May 17, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A 8.0 μg/m3 (7) 5.8 μg/m3 (24) 24.0
 
May 17, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 7.0 μg/m3 (6) 7.8 μg/m3 (32) 32.0
 
May 17, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A 6.0 μg/m3 (5) 6.8 μg/m3 (28) 28.0
 
May 17, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 8.0 μg/m3 (7) 7.8 μg/m3 (32) 32.0
 
May 17, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 5.0 μg/m3 (5) 8.0 μg/m3 (33) 33.0
 
May 17, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 7.0 μg/m3 (6) 5.3 μg/m3 (22) 33.0
 
May 17, 2020, midnight N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 7.0 μg/m3 (6) 4.6 μg/m3 (19) 34.0
 
May 16, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 8.0 μg/m3 (7) 3.9 μg/m3 (16) 34.0
 
May 16, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 8.0 μg/m3 (7) 4.6 μg/m3 (19) 35.0
 
May 16, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 5.0 μg/m3 (5) 5.6 μg/m3 (23) 35.0
 
May 16, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 8.0 μg/m3 (7) 6.1 μg/m3 (25) 35.0
 
May 16, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 7.0 μg/m3 (6) 4.8 μg/m3 (20) 35.0
 
May 16, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 6.0 μg/m3 (5) 6.1 μg/m3 (25) 35.0
 
May 16, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 8.0 μg/m3 (7) 6.1 μg/m3 (25) 35.0
 
May 16, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A 7.0 μg/m3 (6) 3.4 μg/m3 (14) 35.0
 
May 16, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 8.0 μg/m3 (7) 4.6 μg/m3 (19) 33.0
 
May 16, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 12.0 μg/m3 (11) 7.5 μg/m3 (31) 32.0
 
May 16, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 14.0 μg/m3 (13) 10.0 μg/m3 (42) 42.0
 
May 16, 2020, noon N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 19.0 μg/m3 (17) 7.5 μg/m3 (31) 31.0
 
May 16, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A 15.0 μg/m3 (14) 3.9 μg/m3 (16) 25.0
 
May 16, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A 17.0 μg/m3 (15) 5.8 μg/m3 (24) 24.0
 
May 16, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A 23.0 μg/m3 (21) 8.4 μg/m3 (35) 35.0
 
May 16, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 28.0 μg/m3 (25) 9.5 μg/m3 (40) 40.0
 
May 16, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 32.0 μg/m3 (29) 11.4 μg/m3 (48) 48.0
 
May 16, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 40.0 μg/m3 (36) 12.6 μg/m3 (51) 51.0
 
May 16, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A 51.0 μg/m3 (46) 8.0 μg/m3 (33) 46.0
 
May 16, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A 63.0 μg/m3 (54) 9.2 μg/m3 (38) 54.0
 
May 16, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 44.0 μg/m3 (40) 7.7 μg/m3 (32) 40.0
 
May 16, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 41.0 μg/m3 (37) 5.6 μg/m3 (23) 37.0
 
May 16, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A 33.0 μg/m3 (30) 3.7 μg/m3 (15) 34.0
 
May 16, 2020, midnight N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 20.0 μg/m3 (18) 5.2 μg/m3 (22) 37.0
 
May 15, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 16.0 μg/m3 (15) 8.3 μg/m3 (35) 38.0
 
May 15, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A 25.0 μg/m3 (23) 6.4 μg/m3 (27) 39.0
 
May 15, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A 33.0 μg/m3 (30) 7.6 μg/m3 (32) 38.0
 
May 15, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A 28.0 μg/m3 (25) 4.5 μg/m3 (19) 38.0
 
May 15, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A 30.0 μg/m3 (27) 3.5 μg/m3 (15) 37.0
 
May 15, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 51.0 μg/m3 (46) 5.7 μg/m3 (24) 46.0
 
May 15, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A 21.0 μg/m3 (19) 9.3 μg/m3 (39) 39.0