ID: 1439

AQSQID: 240330030

Site Name: Hu-Beltsville

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

Updated: Jan. 25, 2021, 3:31 a.m.

Location: Beltsville (Montpelier), MD

Reporting: True, Located: True

Current AQI: 34.0

Beltsville (Montpelier) MD, US: 39.055302, -76.878304

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 25, 2021, 2 a.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 18.0 ppb (17) 0.19 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 25, 2021, 1 a.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 21.0 ppb (20) 0.14 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 25, 2021, midnight N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 23.0 ppb (22) 0.14 ppb (2) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 24, 2021, 11 p.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (26) 0.13 ppb (2) N/A 6.0 μg/m3 (25) 26.0
 
Jan. 24, 2021, 10 p.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 29.0 ppb (27) 0.13 ppb (2) N/A 6.0 μg/m3 (25) 27.0
 
Jan. 24, 2021, 9 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (31) 0.11 ppb (2) N/A 6.0 μg/m3 (25) 31.0
 
Jan. 24, 2021, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (32) 0.11 ppb (2) N/A 6.0 μg/m3 (25) 32.0
 
Jan. 24, 2021, 7 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (33) 0.1 ppb (2) N/A 3.0 μg/m3 (13) 33.0
 
Jan. 24, 2021, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) 0.1 ppb (2) N/A 3.0 μg/m3 (13) 34.0
 
Jan. 24, 2021, 5 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (33) 0.09 ppb (2) N/A 5.0 μg/m3 (21) 33.0
 
Jan. 24, 2021, 4 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (33) 0.08 ppb (2) N/A 6.0 μg/m3 (25) 33.0
 
Jan. 24, 2021, 3 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) 0.09 ppb (2) N/A 5.0 μg/m3 (21) 32.0
 
Jan. 24, 2021, 2 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) 0.09 ppb (2) N/A 5.0 μg/m3 (21) 31.0
 
Jan. 24, 2021, 1 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (28) 0.1 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 24, 2021, noon N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 29.0 ppb (27) 0.11 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 24, 2021, 11 a.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (28) 0.1 ppb (2) N/A 5.0 μg/m3 (21) 28.0
 
Jan. 24, 2021, 10 a.m. N/A N/A N/A 3.0 ppb (3) N/A 1.0 ppb (2) 31.0 ppb (29) 0.1 ppb (2) N/A 5.0 μg/m3 (21) 29.0
 
Jan. 24, 2021, 9 a.m. N/A N/A N/A 3.0 ppb (3) N/A 1.0 ppb (2) 30.0 ppb (28) 0.1 ppb (2) N/A 6.0 μg/m3 (25) 28.0
 
Jan. 24, 2021, 8 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (28) 0.1 ppb (2) N/A 6.0 μg/m3 (25) 28.0
 
Jan. 24, 2021, 7 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (28) 0.1 ppb (2) N/A 3.0 μg/m3 (13) 28.0
 
Jan. 24, 2021, 6 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (28) 0.1 ppb (2) N/A 3.0 μg/m3 (13) 28.0
 
Jan. 24, 2021, 5 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (29) 0.11 ppb (2) N/A 6.0 μg/m3 (25) 29.0
 
Jan. 24, 2021, 4 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (28) 0.12 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 24, 2021, 3 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (28) 0.11 ppb (2) N/A 4.0 μg/m3 (17) 28.0
 
Jan. 24, 2021, 2 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (30) 0.1 ppb (2) N/A 0.0 μg/m3 (0) 30.0
 
Jan. 24, 2021, 1 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (30) 0.1 ppb (2) N/A 4.0 μg/m3 (17) 30.0
 
Jan. 24, 2021, midnight N/A N/A N/A 3.0 ppb (3) N/A 1.0 ppb (2) 30.0 ppb (28) 0.11 ppb (2) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 23, 2021, 11 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (29) 0.11 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 23, 2021, 10 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (29) 0.11 ppb (2) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 23, 2021, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (31) 0.11 ppb (2) N/A 3.0 μg/m3 (13) 31.0
 
Jan. 23, 2021, 8 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (33) 0.11 ppb (2) N/A 2.0 μg/m3 (9) 33.0
 
Jan. 23, 2021, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) 0.11 ppb (2) N/A 2.0 μg/m3 (9) 34.0
 
Jan. 23, 2021, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) 0.1 ppb (2) N/A 2.0 μg/m3 (9) 34.0
 
Jan. 23, 2021, 5 p.m. N/A N/A N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) 0.1 ppb (2) N/A 4.0 μg/m3 (17) 34.0
 
Jan. 23, 2021, 4 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (33) 0.11 ppb (2) N/A 4.0 μg/m3 (17) 33.0
 
Jan. 23, 2021, 3 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (33) 0.1 ppb (2) N/A 2.0 μg/m3 (9) 33.0
 
Jan. 23, 2021, 2 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) 0.11 ppb (2) N/A 5.0 μg/m3 (21) 31.0
 
Jan. 23, 2021, 1 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) 0.11 ppb (2) N/A 5.0 μg/m3 (21) 26.0
 
Jan. 23, 2021, noon N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) 0.11 ppb (2) N/A 4.0 μg/m3 (17) 26.0
 
Jan. 23, 2021, 11 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (28) 0.11 ppb (2) N/A 5.0 μg/m3 (21) 28.0
 
Jan. 23, 2021, 10 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (28) 0.11 ppb (2) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 23, 2021, 9 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (28) 0.11 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 23, 2021, 8 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (27) 0.11 ppb (2) N/A 6.0 μg/m3 (25) 27.0
 
Jan. 23, 2021, 7 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) 0.12 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 23, 2021, 6 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) 0.1 ppb (2) N/A 6.0 μg/m3 (25) 26.0
 
Jan. 23, 2021, 5 a.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (26) 0.1 ppb (2) N/A 6.0 μg/m3 (25) 26.0
 
Jan. 23, 2021, 4 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (28) 0.12 ppb (2) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 23, 2021, 3 a.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 29.0 ppb (27) 0.1 ppb (2) N/A 6.0 μg/m3 (25) 27.0
 
Jan. 23, 2021, 2 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 26.0 ppb (25) 0.12 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 23, 2021, 1 a.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 23.0 ppb (22) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 22.0
 
Jan. 23, 2021, midnight N/A N/A N/A 10.0 ppb (10) N/A 0.0 ppb (0) 24.0 ppb (23) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 23.0
 
Jan. 22, 2021, 11 p.m. N/A N/A N/A 8.0 ppb (8) N/A 0.0 ppb (0) 27.0 ppb (25) 0.13 ppb (2) N/A 5.0 μg/m3 (21) 25.0
 
Jan. 22, 2021, 10 p.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 31.0 ppb (29) 0.12 ppb (2) N/A 5.0 μg/m3 (21) 29.0
 
Jan. 22, 2021, 9 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (30) 0.1 ppb (2) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 22, 2021, 8 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (32) 0.1 ppb (2) N/A 7.0 μg/m3 (30) 32.0
 
Jan. 22, 2021, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (32) 0.1 ppb (2) N/A 1.0 μg/m3 (5) 32.0
 
Jan. 22, 2021, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) 0.11 ppb (2) N/A 1.0 μg/m3 (5) 32.0
 
Jan. 22, 2021, 5 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (29) 0.1 ppb (2) N/A 1.0 μg/m3 (5) 29.0
 
Jan. 22, 2021, 4 p.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 27.0 ppb (25) 0.11 ppb (2) N/A 4.0 μg/m3 (17) 25.0
 
Jan. 22, 2021, 3 p.m. N/A N/A N/A 26.0 ppb (25) N/A 0.0 ppb (0) 7.0 ppb (7) 0.33 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 22, 2021, 2 p.m. N/A N/A N/A 30.0 ppb (29) N/A 0.0 ppb (0) 2.0 ppb (2) 0.38 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 22, 2021, 1 p.m. N/A N/A N/A 27.0 ppb (26) N/A 0.0 ppb (0) 2.0 ppb (2) 0.33 ppb (4) N/A 6.0 μg/m3 (25) 26.0
 
Jan. 22, 2021, noon N/A N/A N/A 30.0 ppb (29) N/A 0.0 ppb (0) 1.0 ppb (1) 0.27 ppb (4) N/A 5.0 μg/m3 (21) 29.0
 
Jan. 22, 2021, 11 a.m. N/A N/A N/A 20.0 ppb (19) N/A 0.0 ppb (0) 8.0 ppb (8) 0.18 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 22, 2021, 10 a.m. N/A N/A N/A 14.0 ppb (14) N/A 0.0 ppb (0) 11.0 ppb (11) 0.16 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 22, 2021, 9 a.m. N/A N/A N/A 17.0 ppb (17) N/A 0.0 ppb (0) 11.0 ppb (11) 0.18 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 22, 2021, 8 a.m. N/A N/A N/A 19.0 ppb (18) N/A 0.0 ppb (0) 8.0 ppb (8) 0.23 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 22, 2021, 7 a.m. N/A N/A N/A 20.0 ppb (19) N/A 0.0 ppb (0) 8.0 ppb (8) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 22, 2021, 6 a.m. N/A N/A N/A 12.0 ppb (12) N/A 0.0 ppb (0) 15.0 ppb (14) 0.17 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 22, 2021, 5 a.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 20.0 ppb (19) 0.14 ppb (2) N/A 4.0 μg/m3 (17) 19.0
 
Jan. 22, 2021, 4 a.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 20.0 ppb (19) 0.13 ppb (2) N/A 2.0 μg/m3 (9) 19.0
 
Jan. 22, 2021, 3 a.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 21.0 ppb (20) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 22, 2021, 2 a.m. N/A N/A N/A 10.0 ppb (10) N/A 0.0 ppb (0) 19.0 ppb (18) 0.15 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 22, 2021, 1 a.m. N/A N/A N/A 11.0 ppb (11) N/A 0.0 ppb (0) 18.0 ppb (17) 0.17 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 22, 2021, midnight N/A N/A N/A 13.0 ppb (13) N/A 0.0 ppb (0) 19.0 ppb (18) 0.19 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 21, 2021, 11 p.m. N/A N/A N/A 10.0 ppb (10) N/A 0.0 ppb (0) 22.0 ppb (21) 0.16 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 21, 2021, 10 p.m. N/A N/A N/A 8.0 ppb (8) N/A 0.0 ppb (0) 26.0 ppb (25) 0.14 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 21, 2021, 9 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (30) 0.1 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 21, 2021, 8 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (32) 0.1 ppb (2) N/A 7.0 μg/m3 (30) 32.0
 
Jan. 21, 2021, 7 p.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (31) 0.09 ppb (2) N/A N/A 31.0
 
Jan. 21, 2021, 6 p.m. N/A N/A N/A 8.0 ppb (8) N/A 0.0 ppb (0) 28.0 ppb (26) 0.12 ppb (2) N/A 3.0 μg/m3 (13) 26.0
 
Jan. 21, 2021, 5 p.m. N/A N/A N/A 10.0 ppb (10) N/A 0.0 ppb (0) 24.0 ppb (23) 0.14 ppb (2) N/A 3.0 μg/m3 (13) 23.0
 
Jan. 21, 2021, 4 p.m. N/A N/A N/A 11.0 ppb (11) N/A 0.0 ppb (0) 21.0 ppb (20) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 20.0
 
Jan. 21, 2021, 3 p.m. N/A N/A N/A 10.0 ppb (10) N/A 0.0 ppb (0) 21.0 ppb (20) 0.17 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 21, 2021, 2 p.m. N/A N/A N/A 19.0 ppb (18) N/A 0.0 ppb (0) 12.0 ppb (12) 0.28 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 21, 2021, 1 p.m. N/A N/A N/A 24.0 ppb (23) N/A 0.0 ppb (0) 3.0 ppb (3) 0.36 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2021, noon N/A N/A N/A 26.0 ppb (25) N/A 0.0 ppb (0) 0.0 ppb (0) 0.36 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 21, 2021, 11 a.m. N/A N/A N/A 26.0 ppb (25) N/A 0.0 ppb (0) 0.0 ppb (0) 0.48 ppb (6) N/A 13.0 μg/m3 (53) 53.0
 
Jan. 21, 2021, 10 a.m. N/A N/A N/A 24.0 ppb (23) N/A 0.0 ppb (0) 0.0 ppb (0) 0.51 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 21, 2021, 9 a.m. N/A N/A N/A 25.0 ppb (24) N/A 0.0 ppb (0) 0.0 ppb (0) 0.51 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 21, 2021, 8 a.m. N/A N/A N/A 26.0 ppb (25) N/A 0.0 ppb (0) 0.0 ppb (0) 0.42 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 21, 2021, 7 a.m. N/A N/A N/A 26.0 ppb (25) N/A 0.0 ppb (0) 0.0 ppb (0) 0.48 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 21, 2021, 6 a.m. N/A N/A N/A 24.0 ppb (23) N/A 0.0 ppb (0) 0.0 ppb (0) 0.34 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 21, 2021, 5 a.m. N/A N/A N/A 19.0 ppb (18) N/A 0.0 ppb (0) 3.0 ppb (3) 0.23 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 21, 2021, 4 a.m. N/A N/A N/A 13.0 ppb (13) N/A 0.0 ppb (0) 8.0 ppb (8) 0.2 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Jan. 21, 2021, 3 a.m. N/A N/A N/A 15.0 ppb (15) N/A 0.0 ppb (0) 9.0 ppb (9) 0.21 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 21, 2021, 2 a.m. N/A N/A N/A 11.0 ppb (11) N/A 0.0 ppb (0) 13.0 ppb (13) 0.17 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2021, 1 a.m. N/A N/A N/A 10.0 ppb (10) N/A 0.0 ppb (0) 17.0 ppb (16) 0.17 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 21, 2021, midnight N/A N/A N/A 8.0 ppb (8) N/A 0.0 ppb (0) 20.0 ppb (19) 0.16 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2021, 11 p.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 27.0 ppb (25) 0.13 ppb (2) N/A 4.0 μg/m3 (17) 25.0
 
Jan. 20, 2021, 10 p.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (26) 0.12 ppb (2) N/A 5.0 μg/m3 (21) 26.0
 
Jan. 20, 2021, 9 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 29.0 ppb (27) 0.13 ppb (2) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 20, 2021, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (29) 0.12 ppb (2) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 20, 2021, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (27) 0.11 ppb (2) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 20, 2021, 6 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) 0.11 ppb (2) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 20, 2021, 5 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (25) 0.1 ppb (2) N/A N/A 25.0
 
Jan. 20, 2021, 4 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 26.0 ppb (25) 0.09 ppb (2) N/A 4.0 μg/m3 (17) 25.0
 
Jan. 20, 2021, 3 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (25) 0.09 ppb (2) N/A 1.0 μg/m3 (5) 25.0
 
Jan. 20, 2021, 2 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) 0.09 ppb (2) N/A 3.0 μg/m3 (13) 26.0
 
Jan. 20, 2021, 1 p.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 25.0 ppb (24) 0.1 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 20, 2021, noon N/A N/A N/A 12.0 ppb (12) N/A 0.0 ppb (0) 19.0 ppb (18) 0.11 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2021, 11 a.m. N/A N/A N/A 14.0 ppb (14) N/A 0.0 ppb (0) 16.0 ppb (15) 0.14 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2021, 10 a.m. N/A N/A N/A 11.0 ppb (11) N/A 0.0 ppb (0) 19.0 ppb (18) 0.13 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2021, 9 a.m. N/A N/A N/A 25.0 ppb (24) N/A 0.0 ppb (0) 9.0 ppb (9) 0.29 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 20, 2021, 8 a.m. N/A N/A N/A 26.0 ppb (25) N/A 0.0 ppb (0) 0.0 ppb (0) 0.57 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2021, 7 a.m. N/A N/A N/A 29.0 ppb (28) N/A 0.0 ppb (0) 0.0 ppb (0) 0.57 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 20, 2021, 6 a.m. N/A N/A N/A 30.0 ppb (29) N/A 0.0 ppb (0) 0.0 ppb (0) 0.51 ppb (6) N/A 5.0 μg/m3 (21) 29.0
 
Jan. 20, 2021, 5 a.m. N/A N/A N/A 33.0 ppb (32) N/A 0.0 ppb (0) 0.0 ppb (0) 0.38 ppb (5) N/A 4.0 μg/m3 (17) 32.0
 
Jan. 20, 2021, 4 a.m. N/A N/A N/A 33.0 ppb (32) N/A 0.0 ppb (0) 0.0 ppb (0) 0.37 ppb (5) N/A 6.0 μg/m3 (25) 32.0
 
Jan. 20, 2021, 3 a.m. N/A N/A N/A 27.0 ppb (26) N/A 0.0 ppb (0) 4.0 ppb (4) 0.38 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 20, 2021, 2 a.m. N/A N/A N/A 16.0 ppb (16) N/A 0.0 ppb (0) 15.0 ppb (14) 0.21 ppb (3) N/A 3.0 μg/m3 (13) 16.0
 
Jan. 20, 2021, 1 a.m. N/A N/A N/A 16.0 ppb (16) N/A 0.0 ppb (0) 14.0 ppb (13) 0.22 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2021, midnight N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 23.0 ppb (22) 0.18 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 19, 2021, 11 p.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 26.0 ppb (25) 0.13 ppb (2) N/A 3.0 μg/m3 (13) 25.0
 
Jan. 19, 2021, 10 p.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 33.0 ppb (31) 0.12 ppb (2) N/A 2.0 μg/m3 (9) 31.0
 
Jan. 19, 2021, 9 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (35) 0.1 ppb (2) N/A 3.0 μg/m3 (13) 35.0
 
Jan. 19, 2021, 8 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (36) 0.1 ppb (2) N/A 0.0 μg/m3 (0) 36.0
 
Jan. 19, 2021, 7 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) 0.09 ppb (2) N/A 1.0 μg/m3 (5) 34.0
 
Jan. 19, 2021, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) 0.1 ppb (2) N/A 2.0 μg/m3 (9) 32.0
 
Jan. 19, 2021, 5 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 4.0 μg/m3 (17) 30.0
 
Jan. 19, 2021, 4 p.m. N/A N/A N/A 10.0 ppb (10) N/A 0.0 ppb (0) 25.0 ppb (24) 0.17 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 19, 2021, 3 p.m. N/A N/A N/A 17.0 ppb (17) N/A 0.0 ppb (0) 17.0 ppb (16) 0.21 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 19, 2021, 2 p.m. N/A N/A N/A 19.0 ppb (18) N/A 0.0 ppb (0) 13.0 ppb (13) 0.22 ppb (3) N/A 4.0 μg/m3 (17) 18.0
 
Jan. 19, 2021, 1 p.m. N/A N/A N/A 23.0 ppb (22) N/A 0.0 ppb (0) 9.0 ppb (9) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 19, 2021, noon N/A N/A N/A 17.0 ppb (17) N/A 0.0 ppb (0) 9.0 ppb (9) 0.2 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 19, 2021, 11 a.m. N/A N/A N/A 11.0 ppb (11) N/A 0.0 ppb (0) 12.0 ppb (12) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 19, 2021, 10 a.m. N/A N/A N/A 12.0 ppb (12) N/A 0.0 ppb (0) 14.0 ppb (13) 0.19 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 19, 2021, 9 a.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 13.0 ppb (13) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 19, 2021, 8 a.m. N/A N/A N/A 9.0 ppb (9) N/A N/A 13.0 ppb (13) 0.17 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Jan. 19, 2021, 7 a.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 13.0 ppb (13) N/A N/A 4.0 μg/m3 (17) 17.0
 
Jan. 19, 2021, 6 a.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 13.0 ppb (13) 0.17 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 19, 2021, 5 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 17.0 ppb (16) 0.16 ppb (3) N/A 3.0 μg/m3 (13) 16.0
 
Jan. 19, 2021, 4 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 20.0 ppb (19) 0.16 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 19, 2021, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 22.0 ppb (21) 0.16 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 19, 2021, 2 a.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 21.0 ppb (20) 0.16 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 19, 2021, 1 a.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 21.0 ppb (20) 0.16 ppb (3) N/A 4.0 μg/m3 (17) 20.0
 
Jan. 19, 2021, midnight N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 23.0 ppb (22) 0.16 ppb (3) N/A 4.0 μg/m3 (17) 22.0
 
Jan. 18, 2021, 11 p.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 26.0 ppb (25) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 25.0
 
Jan. 18, 2021, 10 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 27.0 ppb (25) 0.14 ppb (2) N/A 2.0 μg/m3 (9) 25.0
 
Jan. 18, 2021, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 26.0 ppb (25) 0.14 ppb (2) N/A 2.0 μg/m3 (9) 25.0
 
Jan. 18, 2021, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (24) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 24.0
 
Jan. 18, 2021, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 24.0 ppb (23) 0.14 ppb (2) N/A 2.0 μg/m3 (9) 23.0
 
Jan. 18, 2021, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (25) 0.14 ppb (2) N/A -1.0 μg/m3 (0) 25.0
 
Jan. 18, 2021, 5 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (25) 0.14 ppb (2) N/A 0.0 μg/m3 (0) 25.0
 
Jan. 18, 2021, 4 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (25) 0.14 ppb (2) N/A 0.0 μg/m3 (0) 25.0
 
Jan. 18, 2021, 3 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (27) 0.14 ppb (2) N/A 2.0 μg/m3 (9) 27.0
 
Jan. 18, 2021, 2 p.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 24.0 ppb (23) 0.16 ppb (3) N/A 4.0 μg/m3 (17) 23.0
 
Jan. 18, 2021, 1 p.m. N/A N/A N/A 14.0 ppb (14) N/A 0.0 ppb (0) 10.0 ppb (10) 0.2 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2021, noon N/A N/A N/A 19.0 ppb (18) N/A 0.0 ppb (0) 1.0 ppb (1) 0.26 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2021, 11 a.m. N/A N/A N/A 12.0 ppb (12) N/A 0.0 ppb (0) 7.0 ppb (7) 0.2 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2021, 10 a.m. N/A N/A N/A 10.0 ppb (10) N/A 0.0 ppb (0) 6.0 ppb (6) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 18, 2021, 9 a.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 8.0 ppb (8) 0.18 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2021, 8 a.m. N/A N/A N/A 8.0 ppb (8) N/A 0.0 ppb (0) 11.0 ppb (11) 0.17 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2021, 7 a.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 12.0 ppb (12) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 18, 2021, 6 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 15.0 ppb (14) 0.17 ppb (3) N/A 3.0 μg/m3 (13) 14.0
 
Jan. 18, 2021, 5 a.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 14.0 ppb (13) 0.18 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Jan. 18, 2021, 4 a.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 11.0 ppb (11) 0.2 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 18, 2021, 3 a.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 13.0 ppb (13) 0.21 ppb (3) N/A 3.0 μg/m3 (13) 13.0