ID: 2504

AQSQID: 110010051

Site Name: Dcnearroad

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

Updated: Sept. 26, 2020, 6:39 p.m.

Location: Washington (Riv Terrace), DC

Reporting: True, Located: True

Current AQI: 21.0

Washington (Riv Terrace) DC, US: 38.894749, -76.953427

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 26, 2020, 5 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.24 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 26, 2020, 4 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.2 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 26, 2020, 3 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 26, 2020, 2 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.19 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 26, 2020, 1 p.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 26, 2020, noon N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.23 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 26, 2020, 11 a.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.15 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
Sept. 26, 2020, 10 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.14 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 26, 2020, 9 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.13 ppb (1) N/A -2.0 μg/m3 (0) 4.0
 
Sept. 26, 2020, 8 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.06 ppb (1) N/A 1.0 μg/m3 (4) 4.0
 
Sept. 26, 2020, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 0.06 ppb (1) N/A 2.0 μg/m3 (8) 8.0
 
Sept. 26, 2020, 6 a.m. N/A N/A N/A 0.0 ppb (0) N/A N/A N/A 0.06 ppb (1) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 26, 2020, 5 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.15 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 26, 2020, 4 a.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 26, 2020, 3 a.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.37 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 26, 2020, 2 a.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.44 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 26, 2020, 1 a.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.59 ppb (7) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 26, 2020, midnight N/A N/A N/A 20.0 ppb (19) N/A N/A N/A 0.56 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 25, 2020, 11 p.m. N/A N/A N/A 21.0 ppb (19) N/A N/A N/A 0.72 ppb (8) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 25, 2020, 10 p.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.57 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 25, 2020, 9 p.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.47 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 25, 2020, 8 p.m. N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 25, 2020, 7 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 25, 2020, 6 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.09 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 25, 2020, 5 p.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.24 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 25, 2020, 4 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.25 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 25, 2020, 3 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 25, 2020, 2 p.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.26 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 25, 2020, 1 p.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.34 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 25, 2020, noon N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.61 ppb (7) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 25, 2020, 11 a.m. N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.49 ppb (5) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 25, 2020, 10 a.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.39 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 25, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A N/A 0.36 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 25, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A N/A 0.3 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 25, 2020, 7 a.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.37 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 25, 2020, 6 a.m. N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.29 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 25, 2020, 5 a.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.42 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 25, 2020, 4 a.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.35 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 25, 2020, 3 a.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.6 ppb (7) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 25, 2020, 2 a.m. N/A N/A N/A 22.0 ppb (20) N/A N/A N/A 0.68 ppb (8) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 25, 2020, 1 a.m. N/A N/A N/A 24.0 ppb (22) N/A N/A N/A 1.32 ppb (15) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 25, 2020, midnight N/A N/A N/A 25.0 ppb (23) N/A N/A N/A 0.67 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 24, 2020, 11 p.m. N/A N/A N/A 23.0 ppb (21) N/A N/A N/A 0.73 ppb (8) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 24, 2020, 10 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.59 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 24, 2020, 9 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A N/A 0.49 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 24, 2020, 8 p.m. N/A N/A N/A 24.0 ppb (22) N/A N/A N/A 0.63 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 24, 2020, 7 p.m. N/A N/A N/A 22.0 ppb (20) N/A N/A N/A 0.45 ppb (5) N/A 16.0 μg/m3 (59) 59.0
 
Sept. 24, 2020, 6 p.m. N/A N/A N/A 27.0 ppb (25) N/A N/A N/A 0.5 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 24, 2020, 5 p.m. N/A N/A N/A 20.0 ppb (19) N/A N/A N/A 0.4 ppb (4) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 24, 2020, 4 p.m. N/A N/A N/A 22.0 ppb (20) N/A N/A N/A 0.37 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 24, 2020, 3 p.m. N/A N/A N/A 23.0 ppb (21) N/A N/A N/A 0.34 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 24, 2020, 2 p.m. N/A N/A N/A 32.0 ppb (30) N/A N/A N/A 0.44 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 24, 2020, 1 p.m. N/A N/A N/A 34.0 ppb (31) N/A N/A N/A 0.57 ppb (6) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 24, 2020, noon N/A N/A N/A 34.0 ppb (31) N/A N/A N/A 0.54 ppb (6) N/A 16.0 μg/m3 (59) 59.0
 
Sept. 24, 2020, 11 a.m. N/A N/A N/A 36.0 ppb (33) N/A N/A N/A 0.56 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 24, 2020, 10 a.m. N/A N/A N/A 34.0 ppb (31) N/A N/A N/A 0.65 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 24, 2020, 9 a.m. N/A N/A N/A 28.0 ppb (26) N/A N/A N/A 0.56 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 24, 2020, 8 a.m. N/A N/A N/A 28.0 ppb (26) N/A N/A N/A 0.57 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 24, 2020, 7 a.m. N/A N/A N/A 27.0 ppb (25) N/A N/A N/A 0.47 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 24, 2020, 6 a.m. N/A N/A N/A 24.0 ppb (22) N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 24, 2020, 5 a.m. N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.45 ppb (5) N/A 2.0 μg/m3 (8) 18.0
 
Sept. 24, 2020, 4 a.m. N/A N/A N/A 22.0 ppb (20) N/A N/A N/A 0.61 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 24, 2020, 3 a.m. N/A N/A N/A 27.0 ppb (25) N/A N/A N/A 0.76 ppb (8) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 24, 2020, 2 a.m. N/A N/A N/A 26.0 ppb (24) N/A N/A N/A 0.78 ppb (9) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 24, 2020, 1 a.m. N/A N/A N/A 27.0 ppb (25) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 24, 2020, midnight N/A N/A N/A 29.0 ppb (27) N/A N/A N/A 0.66 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 23, 2020, 11 p.m. N/A N/A N/A 32.0 ppb (30) N/A N/A N/A 0.77 ppb (9) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 23, 2020, 10 p.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.42 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 23, 2020, 9 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.2 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 23, 2020, 8 p.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.18 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 23, 2020, 7 p.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 23, 2020, 6 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.18 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 23, 2020, 5 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.18 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 23, 2020, 4 p.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.22 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 23, 2020, 3 p.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.19 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 23, 2020, 2 p.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.2 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 23, 2020, 1 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.2 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 23, 2020, noon N/A N/A N/A 30.0 ppb (28) N/A N/A N/A 0.43 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 23, 2020, 11 a.m. N/A N/A N/A 38.0 ppb (35) N/A N/A N/A 0.79 ppb (9) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 23, 2020, 10 a.m. N/A N/A N/A 37.0 ppb (34) N/A N/A N/A 0.9 ppb (10) N/A 16.0 μg/m3 (59) 59.0
 
Sept. 23, 2020, 9 a.m. N/A N/A N/A 33.0 ppb (31) N/A N/A N/A 0.67 ppb (7) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 23, 2020, 8 a.m. N/A N/A N/A 29.0 ppb (27) N/A N/A N/A 0.37 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 23, 2020, 7 a.m. N/A N/A N/A 25.0 ppb (23) N/A N/A N/A 0.37 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 23, 2020, 6 a.m. N/A N/A N/A 26.0 ppb (24) N/A N/A N/A 0.49 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 23, 2020, 5 a.m. N/A N/A N/A 20.0 ppb (19) N/A N/A N/A 0.44 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 23, 2020, 4 a.m. N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 0.26 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 23, 2020, 3 a.m. N/A N/A N/A 20.0 ppb (19) N/A N/A N/A 0.45 ppb (5) N/A 4.0 μg/m3 (17) 19.0
 
Sept. 23, 2020, 2 a.m. N/A N/A N/A 32.0 ppb (30) N/A N/A N/A 0.91 ppb (10) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 23, 2020, 1 a.m. N/A N/A N/A 35.0 ppb (32) N/A N/A N/A 0.85 ppb (9) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 23, 2020, midnight N/A N/A N/A 34.0 ppb (31) N/A N/A N/A 0.97 ppb (11) N/A 4.0 μg/m3 (17) 31.0
 
Sept. 22, 2020, 11 p.m. N/A N/A N/A 24.0 ppb (22) N/A N/A N/A 0.66 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 22, 2020, 10 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.19 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 22, 2020, 9 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.16 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 22, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A N/A 0.13 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 22, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 22, 2020, 6 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.11 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 22, 2020, 5 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.14 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 22, 2020, 4 p.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.17 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 22, 2020, 3 p.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.2 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 22, 2020, 2 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.34 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 22, 2020, 1 p.m. N/A N/A N/A 21.0 ppb (19) N/A N/A N/A 0.44 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 22, 2020, noon N/A N/A N/A 23.0 ppb (21) N/A N/A N/A 0.54 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 22, 2020, 11 a.m. N/A N/A N/A 25.0 ppb (23) N/A N/A N/A 0.9 ppb (10) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 22, 2020, 10 a.m. N/A N/A N/A 18.0 ppb (17) N/A N/A N/A 0.84 ppb (9) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 22, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A N/A 0.83 ppb (9) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 22, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A N/A 0.71 ppb (8) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 22, 2020, 7 a.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.7 ppb (8) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 22, 2020, 6 a.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.72 ppb (8) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 22, 2020, 5 a.m. N/A N/A N/A 18.0 ppb (17) N/A N/A N/A 1.08 ppb (12) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 22, 2020, 4 a.m. N/A N/A N/A 20.0 ppb (19) N/A N/A N/A 0.99 ppb (11) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 22, 2020, 3 a.m. N/A N/A N/A 24.0 ppb (22) N/A N/A N/A 1.04 ppb (12) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 22, 2020, 2 a.m. N/A N/A N/A 25.0 ppb (23) N/A N/A N/A 0.99 ppb (11) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 22, 2020, 1 a.m. N/A N/A N/A 28.0 ppb (26) N/A N/A N/A 1.01 ppb (11) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 22, 2020, midnight N/A N/A N/A 28.0 ppb (26) N/A N/A N/A 1.0 ppb (11) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 21, 2020, 11 p.m. N/A N/A N/A 24.0 ppb (22) N/A N/A N/A 0.61 ppb (7) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 21, 2020, 10 p.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.44 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 21, 2020, 9 p.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.37 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 21, 2020, 8 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 21, 2020, 7 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.27 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 21, 2020, 6 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.21 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 21, 2020, 5 p.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.22 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 21, 2020, 4 p.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 21, 2020, 3 p.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.23 ppb (3) N/A N/A 8.0
 
Sept. 21, 2020, 2 p.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 21, 2020, 1 p.m. N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 0.3 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 21, 2020, noon N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.3 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 21, 2020, 11 a.m. N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.31 ppb (3) N/A 3.0 μg/m3 (12) 18.0
 
Sept. 21, 2020, 10 a.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 21, 2020, 9 a.m. N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 21, 2020, 8 a.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.41 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 21, 2020, 7 a.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 21, 2020, 6 a.m. N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 0.39 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 21, 2020, 5 a.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.28 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 21, 2020, 4 a.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.3 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 21, 2020, 3 a.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.45 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 21, 2020, 2 a.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.5 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 21, 2020, 1 a.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.41 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 21, 2020, midnight N/A N/A N/A N/A N/A N/A N/A 0.56 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A N/A 0.49 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2020, 10 p.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.36 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 20, 2020, 9 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 20, 2020, 8 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 20, 2020, 7 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.29 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 20, 2020, 6 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.24 ppb (3) N/A 2.0 μg/m3 (8) 8.0
 
Sept. 20, 2020, 5 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 20, 2020, 4 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.22 ppb (2) N/A 1.0 μg/m3 (4) 6.0
 
Sept. 20, 2020, 3 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.23 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 20, 2020, 2 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2020, 1 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 20, 2020, noon N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.22 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 20, 2020, 11 a.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.31 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 20, 2020, 10 a.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.39 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 20, 2020, 9 a.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.45 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 20, 2020, 8 a.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.52 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 20, 2020, 7 a.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.69 ppb (8) N/A 18.0 μg/m3 (63) 63.0
 
Sept. 20, 2020, 6 a.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.78 ppb (9) N/A 20.0 μg/m3 (67) 67.0
 
Sept. 20, 2020, 5 a.m. N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 0.84 ppb (9) N/A 25.0 μg/m3 (78) 78.0
 
Sept. 20, 2020, 4 a.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.99 ppb (11) N/A 26.0 μg/m3 (80) 80.0
 
Sept. 20, 2020, 3 a.m. N/A N/A N/A 20.0 ppb (19) N/A N/A N/A 0.71 ppb (8) N/A 30.0 μg/m3 (88) 88.0
 
Sept. 20, 2020, 2 a.m. N/A N/A N/A 21.0 ppb (19) N/A N/A N/A 0.68 ppb (8) N/A 22.0 μg/m3 (71) 71.0
 
Sept. 20, 2020, 1 a.m. N/A N/A N/A 22.0 ppb (20) N/A N/A N/A 0.88 ppb (10) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 20, 2020, midnight N/A N/A N/A 23.0 ppb (21) N/A N/A N/A 0.81 ppb (9) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2020, 11 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A N/A 0.68 ppb (8) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 19, 2020, 10 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.31 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 19, 2020, 9 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 19, 2020, 8 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.2 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2020, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.18 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2020, 6 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.22 ppb (2) N/A 3.0 μg/m3 (12) 12.0