AQSQID: 240330030

Site Name: Hu-Beltsville

Location: Prince George's Co, MD

Reporting: True, Located: True

Current AQI: 27.0

Prince George's Co MD, US: 39.055302, -76.878304

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 21, 2019, 10 p.m. 4.5 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 35.0 ppb (27) 0.08 ppb (1) N/A 6.0 μg/m3 (25) 27.0
 
Jan. 21, 2019, 9 p.m. 4.4 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 36.0 ppb (28) 0.08 ppb (1) N/A 5.0 μg/m3 (21) 28.0
 
Jan. 21, 2019, 8 p.m. 3.9 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 37.0 ppb (28) 0.09 ppb (1) N/A 3.0 μg/m3 (12) 28.0
 
Jan. 21, 2019, 7 p.m. 3.7 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 38.0 ppb (29) 0.08 ppb (1) N/A 3.0 μg/m3 (12) 29.0
 
Jan. 21, 2019, 6 p.m. 3.0 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 38.0 ppb (29) 0.08 ppb (1) N/A 4.0 μg/m3 (17) 29.0
 
Jan. 21, 2019, 5 p.m. 3.3 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 37.0 ppb (28) 0.08 ppb (1) N/A 3.0 μg/m3 (12) 28.0
 
Jan. 21, 2019, 4 p.m. 3.5 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 37.0 ppb (28) 0.08 ppb (1) N/A 3.0 μg/m3 (12) 28.0
 
Jan. 21, 2019, 3 p.m. 3.6 ppb (3) 1.1 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 36.0 ppb (28) 0.09 ppb (1) N/A 3.0 μg/m3 (12) 28.0
 
Jan. 21, 2019, 2 p.m. 4.2 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 35.0 ppb (27) 0.09 ppb (1) N/A 4.0 μg/m3 (17) 27.0
 
Jan. 21, 2019, 1 p.m. 3.4 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 35.0 ppb (27) 0.08 ppb (1) N/A 4.0 μg/m3 (17) 27.0
 
Jan. 21, 2019, noon 3.5 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 34.0 ppb (26) 0.08 ppb (1) N/A 2.0 μg/m3 (8) 26.0
 
Jan. 21, 2019, 11 a.m. 3.6 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 34.0 ppb (26) 0.08 ppb (1) N/A 3.0 μg/m3 (12) 26.0
 
Jan. 21, 2019, 10 a.m. 3.4 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (27) 0.07 ppb (1) N/A 3.0 μg/m3 (12) 27.0
 
Jan. 21, 2019, 9 a.m. 2.6 ppb (2) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 35.0 ppb (27) 0.07 ppb (1) N/A 4.0 μg/m3 (17) 27.0
 
Jan. 21, 2019, 8 a.m. 2.4 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) 0.07 ppb (1) N/A 4.0 μg/m3 (17) 28.0
 
Jan. 21, 2019, 7 a.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 38.0 ppb (29) 0.07 ppb (1) N/A 2.0 μg/m3 (8) 29.0
 
Jan. 21, 2019, 6 a.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) 0.07 ppb (1) N/A 0.0 μg/m3 (0) 29.0
 
Jan. 21, 2019, 5 a.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) 0.07 ppb (1) N/A 1.0 μg/m3 (4) 30.0
 
Jan. 21, 2019, 4 a.m. 1.8 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) 0.06 ppb (1) N/A 4.0 μg/m3 (17) 30.0
 
Jan. 21, 2019, 3 a.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) 0.08 ppb (1) N/A 3.0 μg/m3 (12) 30.0
 
Jan. 21, 2019, 2 a.m. 2.2 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (30) 0.09 ppb (1) N/A 1.0 μg/m3 (4) 30.0
 
Jan. 21, 2019, 1 a.m. 2.3 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) 0.08 ppb (1) N/A 5.0 μg/m3 (21) 30.0
 
Jan. 21, 2019, midnight 2.3 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 40.0 ppb (31) 0.07 ppb (1) N/A 7.0 μg/m3 (29) 31.0
 
Jan. 20, 2019, 11 p.m. 2.5 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) 0.08 ppb (1) N/A 3.0 μg/m3 (12) 30.0
 
Jan. 20, 2019, 10 p.m. 2.8 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 38.0 ppb (29) 0.08 ppb (1) N/A 5.0 μg/m3 (21) 29.0
 
Jan. 20, 2019, 9 p.m. 2.6 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) 0.09 ppb (1) N/A 5.0 μg/m3 (21) 28.0
 
Jan. 20, 2019, 8 p.m. 2.8 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 33.0 ppb (25) 0.12 ppb (1) N/A 5.0 μg/m3 (21) 25.0
 
Jan. 20, 2019, 7 p.m. 2.5 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) 0.13 ppb (1) N/A 4.0 μg/m3 (17) 25.0
 
Jan. 20, 2019, 6 p.m. 3.4 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, 5 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 25.0 ppb (19) 0.15 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 20, 2019, 4 p.m. 4.4 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 23.0 ppb (18) 0.14 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, 3 p.m. 5.2 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 18.0 ppb (14) 0.17 ppb (2) N/A 3.0 μg/m3 (12) 14.0
 
Jan. 20, 2019, 2 p.m. 6.1 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 18.0 ppb (14) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 20, 2019, 1 p.m. 7.4 ppb (7) 0.5 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 16.0 ppb (12) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2019, noon 8.4 ppb (8) 0.1 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 15.0 ppb (12) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 20, 2019, 11 a.m. 9.5 ppb (9) 0.1 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 12.0 ppb (9) 0.15 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 20, 2019, 10 a.m. 7.7 ppb (7) 0.1 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 19.0 ppb (15) 0.13 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2019, 9 a.m. 3.6 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (22) 0.1 ppb (1) N/A 3.0 μg/m3 (12) 22.0
 
Jan. 20, 2019, 8 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (22) 0.1 ppb (1) N/A -1.0 μg/m3 (0) 22.0
 
Jan. 20, 2019, 7 a.m. 7.4 ppb (7) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (15) 0.14 ppb (2) N/A 0.0 μg/m3 (0) 15.0
 
Jan. 20, 2019, 6 a.m. 12.4 ppb (11) 0.1 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 14.0 ppb (11) 0.18 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
Jan. 20, 2019, 5 a.m. 13.9 ppb (13) 0.1 ppb (0) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 12.0 ppb (9) 0.19 ppb (2) N/A 2.0 μg/m3 (8) 13.0
 
Jan. 20, 2019, 4 a.m. 13.9 ppb (13) 0.1 ppb (0) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 12.0 ppb (9) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 20, 2019, 3 a.m. 13.4 ppb (12) 0.1 ppb (0) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 12.0 ppb (9) 0.05 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, 2 a.m. 11.7 ppb (11) 0.1 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 14.0 ppb (11) 0.04 ppb (0) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 20, 2019, 1 a.m. 7.6 ppb (7) 0.1 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 19.0 ppb (15) 0.03 ppb (0) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 20, 2019, midnight 7.1 ppb (7) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (15) 0.03 ppb (0) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 19, 2019, 11 p.m. 7.4 ppb (7) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 21.0 ppb (16) 0.02 ppb (0) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 19, 2019, 10 p.m. 8.7 ppb (8) 0.1 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 20.0 ppb (15) 0.04 ppb (0) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 19, 2019, 9 p.m. 8.6 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 20.0 ppb (15) 0.04 ppb (0) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 8 p.m. 9.6 ppb (9) 0.5 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 18.0 ppb (14) 0.06 ppb (1) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 19, 2019, 7 p.m. 11.4 ppb (11) 1.5 ppb (1) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 14.0 ppb (11) 0.09 ppb (1) N/A 20.0 μg/m3 (67) 67.0
 
Jan. 19, 2019, 6 p.m. 11.6 ppb (11) 2.4 ppb (2) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 13.0 ppb (10) 0.09 ppb (1) N/A 19.0 μg/m3 (65) 65.0
 
Jan. 19, 2019, 5 p.m. 11.4 ppb (11) 2.7 ppb (3) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 13.0 ppb (10) 0.08 ppb (1) N/A 23.0 μg/m3 (73) 73.0
 
Jan. 19, 2019, 4 p.m. 11.7 ppb (11) 2.2 ppb (2) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 12.0 ppb (9) 0.07 ppb (1) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 19, 2019, 3 p.m. 15.9 ppb (15) 3.9 ppb (4) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 9.0 ppb (7) 0.11 ppb (1) N/A 17.0 μg/m3 (61) 61.0
 
Jan. 19, 2019, 2 p.m. 25.9 ppb (24) 9.7 ppb (9) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 4.0 ppb (3) 0.18 ppb (2) N/A 22.0 μg/m3 (71) 71.0
 
Jan. 19, 2019, 1 p.m. 33.1 ppb (31) 14.9 ppb (14) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 1.0 ppb (1) 0.24 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
Jan. 19, 2019, noon 39.8 ppb (37) 19.4 ppb (18) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 0.0 ppb (0) 0.29 ppb (3) N/A 19.0 μg/m3 (65) 65.0
 
Jan. 19, 2019, 11 a.m. 40.1 ppb (37) 23.4 ppb (22) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 0.0 ppb (0) 0.31 ppb (3) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 19, 2019, 10 a.m. 35.9 ppb (33) 19.3 ppb (18) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 0.0 ppb (0) 0.26 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 9 a.m. 18.4 ppb (17) 4.4 ppb (4) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 0.0 ppb (0) 0.17 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 19, 2019, 8 a.m. 14.7 ppb (14) 1.2 ppb (1) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 1.0 ppb (1) 0.13 ppb (1) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 19, 2019, 7 a.m. 13.9 ppb (13) 1.0 ppb (1) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 1.0 ppb (1) 0.12 ppb (1) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 19, 2019, 6 a.m. 10.9 ppb (10) 0.4 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 3.0 ppb (2) 0.11 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 19, 2019, 5 a.m. 15.3 ppb (14) 1.4 ppb (1) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 3.0 ppb (2) 0.13 ppb (1) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 19, 2019, 4 a.m. 37.1 ppb (34) 18.4 ppb (17) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 2.0 ppb (2) 0.25 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 19, 2019, 3 a.m. 69.0 ppb (66) 46.8 ppb (43) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 0.0 ppb (0) 0.66 ppb (7) N/A 17.0 μg/m3 (61) 66.0
 
Jan. 19, 2019, 2 a.m. 60.2 ppb (57) 38.2 ppb (35) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 0.0 ppb (0) 0.57 ppb (6) N/A 20.0 μg/m3 (67) 67.0
 
Jan. 19, 2019, 1 a.m. 55.7 ppb (52) 31.4 ppb (29) N/A 24.0 ppb (22) N/A 0.0 ppb (0) 0.0 ppb (0) 0.5 ppb (6) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 19, 2019, midnight 44.9 ppb (42) 19.4 ppb (18) N/A 25.0 ppb (23) N/A 0.0 ppb (0) 0.0 ppb (0) 0.4 ppb (4) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 18, 2019, 11 p.m. 39.1 ppb (36) 12.3 ppb (11) N/A 27.0 ppb (25) N/A 0.0 ppb (0) 0.0 ppb (0) 0.37 ppb (4) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 18, 2019, 10 p.m. 29.8 ppb (28) 5.2 ppb (5) N/A 25.0 ppb (23) N/A 0.0 ppb (0) 1.0 ppb (1) 0.31 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 18, 2019, 9 p.m. 20.0 ppb (19) 3.8 ppb (4) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 11.0 ppb (8) 0.25 ppb (3) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 18, 2019, 8 p.m. 15.4 ppb (14) 4.4 ppb (4) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 18.0 ppb (14) 0.22 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2019, 7 p.m. 15.2 ppb (14) 5.7 ppb (5) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 20.0 ppb (15) 0.19 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 18, 2019, 6 p.m. 15.6 ppb (14) 5.9 ppb (5) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 19.0 ppb (15) 0.19 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 18, 2019, 5 p.m. 14.9 ppb (14) 5.3 ppb (5) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 19.0 ppb (15) 0.18 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 18, 2019, 4 p.m. 17.3 ppb (16) 6.0 ppb (6) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 17.0 ppb (13) 0.2 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 13.0 ppb (10) 0.21 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 18, 2019, 2 p.m. 21.5 ppb (20) 6.3 ppb (6) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 13.0 ppb (10) 0.19 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 18, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 10.0 ppb (8) N/A N/A 14.0 μg/m3 (54) 54.0
 
Jan. 18, 2019, noon 9.7 ppb (9) 0.2 ppb (0) N/A 9.0 ppb (8) N/A N/A 15.0 ppb (12) 0.12 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 11 a.m. 8.4 ppb (8) 0.1 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 18.0 ppb (14) 0.1 ppb (1) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 18, 2019, 10 a.m. 6.5 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (15) 0.1 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 18, 2019, 9 a.m. 6.2 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 23.0 ppb (18) 0.09 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 18, 2019, 8 a.m. 6.1 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 23.0 ppb (18) 0.11 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 7 a.m. 6.6 ppb (6) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (17) 0.11 ppb (1) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 18, 2019, 6 a.m. 7.7 ppb (7) 0.1 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 21.0 ppb (16) 0.11 ppb (1) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 18, 2019, 5 a.m. 8.8 ppb (8) 0.1 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 18.0 ppb (14) 0.12 ppb (1) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 18, 2019, 4 a.m. 8.6 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 19.0 ppb (15) 0.15 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 18, 2019, 3 a.m. 8.7 ppb (8) 0.1 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 20.0 ppb (15) 0.15 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2019, 2 a.m. 9.6 ppb (9) 0.1 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 19.0 ppb (15) 0.15 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 18, 2019, 1 a.m. 10.4 ppb (10) 0.1 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 19.0 ppb (15) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2019, midnight 10.6 ppb (10) 0.1 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 20.0 ppb (15) 0.19 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 17, 2019, 11 p.m. 10.2 ppb (9) 0.1 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 21.0 ppb (16) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 10 p.m. 8.6 ppb (8) 0.1 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 23.0 ppb (18) 0.15 ppb (2) N/A 3.0 μg/m3 (12) 18.0
 
Jan. 17, 2019, 9 p.m. 6.6 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 27.0 ppb (21) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2019, 8 p.m. 5.6 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 28.0 ppb (22) 0.14 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 7 p.m. 5.5 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 29.0 ppb (22) 0.13 ppb (1) N/A 3.0 μg/m3 (12) 22.0
 
Jan. 17, 2019, 6 p.m. 5.9 ppb (5) 1.1 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 29.0 ppb (22) 0.13 ppb (1) N/A 3.0 μg/m3 (12) 22.0
 
Jan. 17, 2019, 5 p.m. 5.8 ppb (5) 1.1 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 28.0 ppb (22) 0.13 ppb (1) N/A 4.0 μg/m3 (17) 22.0
 
Jan. 17, 2019, 4 p.m. 5.1 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 29.0 ppb (22) 0.13 ppb (1) N/A 3.0 μg/m3 (12) 22.0
 
Jan. 17, 2019, 3 p.m. 11.0 ppb (10) 2.7 ppb (3) N/A 8.0 ppb (7) N/A 1.0 ppb (1) 25.0 ppb (19) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2019, 2 p.m. 19.8 ppb (18) 4.9 ppb (5) N/A 15.0 ppb (14) N/A 1.0 ppb (1) 18.0 ppb (14) 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 1 p.m. 31.5 ppb (29) 10.0 ppb (9) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 8.0 ppb (6) 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, noon 31.0 ppb (29) 5.2 ppb (5) N/A 26.0 ppb (24) N/A 0.0 ppb (0) 2.0 ppb (2) 0.24 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 17, 2019, 11 a.m. 20.2 ppb (19) 0.6 ppb (1) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 4.0 ppb (3) 0.18 ppb (2) N/A 4.0 μg/m3 (17) 19.0
 
Jan. 17, 2019, 10 a.m. 14.8 ppb (14) 0.2 ppb (0) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 8.0 ppb (6) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 17, 2019, 9 a.m. 12.0 ppb (11) 0.2 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 10.0 ppb (8) 0.16 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2019, 8 a.m. 9.2 ppb (9) 0.1 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 12.0 ppb (9) 0.16 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 17, 2019, 7 a.m. 8.3 ppb (8) 0.1 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 14.0 ppb (11) 0.15 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, 6 a.m. 7.7 ppb (7) 0.1 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 15.0 ppb (12) 0.14 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 17, 2019, 5 a.m. 7.9 ppb (7) 0.1 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 17.0 ppb (13) 0.14 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 4 a.m. 6.3 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (17) 0.14 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2019, 3 a.m. 4.6 ppb (4) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 26.0 ppb (20) 0.0 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 17, 2019, 2 a.m. 6.8 ppb (6) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 22.0 ppb (17) 0.04 ppb (0) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 17, 2019, 1 a.m. 11.9 ppb (11) 0.2 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 13.0 ppb (10) 0.07 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 17, 2019, midnight 11.6 ppb (11) 0.1 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 12.0 ppb (9) 0.06 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Jan. 16, 2019, 11 p.m. 11.3 ppb (10) 0.1 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 15.0 ppb (12) 0.07 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 16, 2019, 10 p.m. 11.0 ppb (10) 0.1 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 19.0 ppb (15) 0.06 ppb (1) N/A 3.0 μg/m3 (12) 15.0
 
Jan. 16, 2019, 9 p.m. 8.5 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 22.0 ppb (17) 0.04 ppb (0) N/A 2.0 μg/m3 (8) 17.0
 
Jan. 16, 2019, 8 p.m. 8.0 ppb (7) 1.1 ppb (1) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 25.0 ppb (19) 0.04 ppb (0) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 16, 2019, 7 p.m. 7.8 ppb (7) 1.5 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 27.0 ppb (21) 0.05 ppb (1) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 16, 2019, 6 p.m. 9.2 ppb (9) 2.3 ppb (2) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 27.0 ppb (21) 0.06 ppb (1) N/A N/A 21.0
 
Jan. 16, 2019, 5 p.m. 14.2 ppb (13) 4.3 ppb (4) N/A 10.0 ppb (9) N/A 1.0 ppb (1) 26.0 ppb (20) 0.12 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 16, 2019, 4 p.m. 57.0 ppb (53) 30.7 ppb (28) N/A 26.0 ppb (24) N/A 1.0 ppb (1) 10.0 ppb (8) 0.42 ppb (5) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 16, 2019, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 2.0 ppb (2) 0.82 ppb (9) N/A 23.0 μg/m3 (73) 73.0
 
Jan. 16, 2019, 2 p.m. 107.0 ppb (101) 70.0 ppb (67) N/A 37.0 ppb (34) N/A 1.0 ppb (1) 2.0 ppb (2) 0.61 ppb (7) N/A 24.0 μg/m3 (76) 101.0
 
Jan. 16, 2019, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 2.0 ppb (2) 0.46 ppb (5) N/A 23.0 μg/m3 (73) 73.0
 
Jan. 16, 2019, noon 93.9 ppb (92) 57.5 ppb (54) N/A 36.0 ppb (33) N/A 1.0 ppb (1) 0.0 ppb (0) 0.59 ppb (7) N/A 18.0 μg/m3 (63) 92.0
 
Jan. 16, 2019, 11 a.m. 136.7 ppb (107) 97.0 ppb (96) N/A 40.0 ppb (37) N/A 1.0 ppb (1) 0.0 ppb (0) 0.82 ppb (9) N/A 27.0 μg/m3 (82) 107.0
 
Jan. 16, 2019, 10 a.m. 101.5 ppb (100) 63.2 ppb (60) N/A 38.0 ppb (35) N/A 1.0 ppb (1) 0.0 ppb (0) N/A N/A 18.0 μg/m3 (63) 100.0
 
Jan. 16, 2019, 9 a.m. 138.8 ppb (107) 101.2 ppb (100) N/A 38.0 ppb (35) N/A 1.0 ppb (1) 0.0 ppb (0) 0.9 ppb (10) N/A 27.0 μg/m3 (82) 107.0
 
Jan. 16, 2019, 8 a.m. 132.8 ppb (106) 95.0 ppb (94) N/A 38.0 ppb (35) N/A 1.0 ppb (1) 0.0 ppb (0) 0.92 ppb (10) N/A 24.0 μg/m3 (76) 106.0
 
Jan. 16, 2019, 7 a.m. 129.7 ppb (106) 92.5 ppb (91) N/A 37.0 ppb (34) N/A 1.0 ppb (1) 0.0 ppb (0) 0.89 ppb (10) N/A 24.0 μg/m3 (76) 106.0
 
Jan. 16, 2019, 6 a.m. 121.8 ppb (104) 85.0 ppb (83) N/A 37.0 ppb (34) N/A 1.0 ppb (1) 0.0 ppb (0) 0.85 ppb (9) N/A 25.0 μg/m3 (78) 104.0
 
Jan. 16, 2019, 5 a.m. 113.1 ppb (102) 76.6 ppb (74) N/A 37.0 ppb (34) N/A 1.0 ppb (1) 0.0 ppb (0) 0.77 ppb (9) N/A 23.0 μg/m3 (73) 102.0
 
Jan. 16, 2019, 4 a.m. 79.9 ppb (78) 43.9 ppb (41) N/A 36.0 ppb (33) N/A 0.0 ppb (0) 0.0 ppb (0) 0.6 ppb (7) N/A 23.0 μg/m3 (73) 78.0
 
Jan. 16, 2019, 3 a.m. 58.3 ppb (55) 21.5 ppb (20) N/A 37.0 ppb (34) N/A 0.0 ppb (0) 0.0 ppb (0) 0.53 ppb (6) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 16, 2019, 2 a.m. 43.5 ppb (40) 8.3 ppb (8) N/A 35.0 ppb (32) N/A 0.0 ppb (0) 0.0 ppb (0) 0.37 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 16, 2019, 1 a.m. 40.9 ppb (38) 7.0 ppb (6) N/A 34.0 ppb (31) N/A 0.0 ppb (0) 2.0 ppb (2) 0.36 ppb (4) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 16, 2019, midnight 27.0 ppb (25) 0.5 ppb (0) N/A 27.0 ppb (25) N/A 0.0 ppb (0) 7.0 ppb (5) 0.31 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 15, 2019, 11 p.m. 18.6 ppb (17) 0.6 ppb (1) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 17.0 ppb (13) 0.22 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 15, 2019, 10 p.m. 9.9 ppb (9) 0.1 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 27.0 ppb (21) 0.17 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 15, 2019, 9 p.m. 7.5 ppb (7) 0.5 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (25) 0.14 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 15, 2019, 8 p.m. 5.8 ppb (5) 0.9 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 36.0 ppb (28) 0.14 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Jan. 15, 2019, 7 p.m. 5.3 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (28) 0.14 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 15, 2019, 6 p.m. 6.2 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 37.0 ppb (28) 0.15 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 15, 2019, 5 p.m. 9.4 ppb (9) 2.8 ppb (3) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 34.0 ppb (26) 0.17 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Jan. 15, 2019, 4 p.m. 8.4 ppb (8) 2.6 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 32.0 ppb (25) N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 15, 2019, 3 p.m. 10.3 ppb (10) 3.2 ppb (3) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 29.0 ppb (22) N/A N/A 13.0 μg/m3 (52) 52.0
 
Jan. 15, 2019, 2 p.m. 19.0 ppb (18) 6.2 ppb (6) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 21.0 ppb (16) 0.13 ppb (1) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 15, 2019, 1 p.m. 19.6 ppb (18) 4.4 ppb (4) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 15.0 ppb (12) 0.17 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 15, 2019, noon 17.9 ppb (17) 0.9 ppb (1) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 12.0 ppb (9) 0.15 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 15, 2019, 11 a.m. 16.4 ppb (15) 0.2 ppb (0) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 12.0 ppb (9) 0.15 ppb (2) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 15, 2019, 10 a.m. 12.8 ppb (12) 0.1 ppb (0) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 13.0 ppb (10) 0.14 ppb (2) N/A 16.0 μg/m3 (59) 59.0
 
Jan. 15, 2019, 9 a.m. 13.0 ppb (12) 0.2 ppb (0) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 15.0 ppb (12) 0.13 ppb (1) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 15, 2019, 8 a.m. 13.4 ppb (12) 0.2 ppb (0) N/A 13.0 ppb (12) N/A N/A 15.0 ppb (12) 0.13 ppb (1) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 15, 2019, 7 a.m. 19.2 ppb (18) 0.4 ppb (0) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 12.0 ppb (9) N/A N/A 13.0 μg/m3 (52) 52.0
 
Jan. 15, 2019, 6 a.m. 28.8 ppb (27) 1.2 ppb (1) N/A 28.0 ppb (26) N/A 0.0 ppb (0) 4.0 ppb (3) 0.2 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
Jan. 15, 2019, 5 a.m. 24.5 ppb (23) 1.1 ppb (1) N/A 23.0 ppb (21) N/A 0.0 ppb (0) 9.0 ppb (7) 0.21 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
Jan. 15, 2019, 4 a.m. 27.8 ppb (26) 0.4 ppb (0) N/A 27.0 ppb (25) N/A 0.0 ppb (0) 9.0 ppb (7) 0.25 ppb (3) N/A 21.0 μg/m3 (69) 69.0
 
Jan. 15, 2019, 3 a.m. 44.0 ppb (41) 6.3 ppb (6) N/A 38.0 ppb (35) N/A 0.0 ppb (0) 2.0 ppb (2) 0.4 ppb (4) N/A 18.0 μg/m3 (63) 63.0
 
Jan. 15, 2019, 2 a.m. 45.5 ppb (42) 6.0 ppb (6) N/A 39.0 ppb (36) N/A 0.0 ppb (0) 0.0 ppb (0) 0.38 ppb (4) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 15, 2019, 1 a.m. 40.3 ppb (37) 2.0 ppb (2) N/A 38.0 ppb (35) N/A 0.0 ppb (0) 1.0 ppb (1) 0.35 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 15, 2019, midnight 31.9 ppb (30) 0.5 ppb (0) N/A 31.0 ppb (29) N/A 0.0 ppb (0) 7.0 ppb (5) 0.24 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 14, 2019, 11 p.m. 21.7 ppb (20) 0.1 ppb (0) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 16.0 ppb (12) 0.2 ppb (2) N/A 3.0 μg/m3 (12) 20.0