AQSQID: 240330030

Site Name: Hu-Beltsville

Location: Prince George's Co, MD

Reporting: True, Located: True

Current AQI: 17.0

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
Sept. 15, 2019, 10 a.m. 4.7 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 12.0 ppb (9) 0.14 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 15, 2019, 9 a.m. 6.2 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 8.0 ppb (6) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 15, 2019, 8 a.m. 4.2 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 12.0 ppb (9) 0.14 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 15, 2019, 7 a.m. 4.5 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 12.0 ppb (9) 0.15 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 15, 2019, 6 a.m. 4.9 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 14.0 ppb (11) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 15, 2019, 5 a.m. 5.0 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 15.0 ppb (12) 0.15 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 15, 2019, 4 a.m. 4.7 ppb (4) 0.2 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 19.0 ppb (15) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 15, 2019, 3 a.m. 4.3 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 21.0 ppb (16) 0.15 ppb (2) N/A 3.0 μg/m3 (12) 16.0
 
Sept. 15, 2019, 2 a.m. 3.9 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 20.0 ppb (15) 0.13 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 15, 2019, 1 a.m. 4.3 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 29.0 ppb (22) 0.14 ppb (2) N/A 5.0 μg/m3 (21) 22.0
 
Sept. 15, 2019, midnight 3.2 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) 0.11 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 14, 2019, 11 p.m. 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (22) 0.1 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 14, 2019, 10 p.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (26) 0.09 ppb (1) N/A 5.0 μg/m3 (21) 26.0
 
Sept. 14, 2019, 9 p.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (28) 0.09 ppb (1) N/A 6.0 μg/m3 (25) 28.0
 
Sept. 14, 2019, 8 p.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) 0.09 ppb (1) N/A 4.0 μg/m3 (17) 28.0
 
Sept. 14, 2019, 7 p.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) 0.09 ppb (1) N/A 6.0 μg/m3 (25) 28.0
 
Sept. 14, 2019, 6 p.m. 1.8 ppb (2) 0.3 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
 
Sept. 14, 2019, 5 p.m. 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) 0.09 ppb (1) N/A 2.0 μg/m3 (8) 31.0
 
Sept. 14, 2019, 4 p.m. 3.1 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (28) 0.1 ppb (1) N/A 6.0 μg/m3 (25) 28.0
 
Sept. 14, 2019, 3 p.m. 3.5 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) 0.1 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 14, 2019, 2 p.m. 2.5 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 26.0 ppb (20) 0.09 ppb (1) N/A 2.0 μg/m3 (8) 20.0
 
Sept. 14, 2019, 1 p.m. 2.9 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 19.0 ppb (15) 0.1 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 14, 2019, noon 4.0 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 12.0 ppb (9) 0.11 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 14, 2019, 11 a.m. 2.6 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 4.0 ppb (3) 0.09 ppb (1) N/A 1.0 μg/m3 (4) 4.0
 
Sept. 14, 2019, 10 a.m. 2.6 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 6.0 ppb (5) 0.08 ppb (1) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 14, 2019, 9 a.m. 2.4 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 5.0 ppb (4) 0.08 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 14, 2019, 8 a.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 6.0 ppb (5) 0.09 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 14, 2019, 7 a.m. 2.3 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 7.0 ppb (5) 0.09 ppb (1) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 14, 2019, 6 a.m. 2.6 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 12.0 ppb (9) 0.1 ppb (1) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 14, 2019, 5 a.m. 2.3 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 14.0 ppb (11) 0.09 ppb (1) N/A 2.0 μg/m3 (8) 11.0
 
Sept. 14, 2019, 4 a.m. 2.1 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 19.0 ppb (15) 0.09 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 14, 2019, 3 a.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (22) 0.07 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 14, 2019, 2 a.m. 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (22) 0.08 ppb (1) N/A 5.0 μg/m3 (21) 22.0
 
Sept. 14, 2019, 1 a.m. 2.3 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (21) 0.09 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 14, 2019, midnight 2.4 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) 0.1 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 13, 2019, 11 p.m. 2.1 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) 0.09 ppb (1) N/A 3.0 μg/m3 (12) 22.0
 
Sept. 13, 2019, 10 p.m. 2.1 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (22) 0.09 ppb (1) N/A 4.0 μg/m3 (17) 22.0
 
Sept. 13, 2019, 9 p.m. 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) 0.09 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 13, 2019, 8 p.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (24) 0.08 ppb (1) N/A 4.0 μg/m3 (17) 24.0
 
Sept. 13, 2019, 7 p.m. 1.6 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (23) 0.08 ppb (1) N/A 2.0 μg/m3 (8) 23.0
 
Sept. 13, 2019, 6 p.m. 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (22) 0.08 ppb (1) N/A 3.0 μg/m3 (12) 22.0
 
Sept. 13, 2019, 5 p.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 25.0 ppb (19) 0.09 ppb (1) N/A 2.0 μg/m3 (8) 19.0
 
Sept. 13, 2019, 4 p.m. 1.8 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 24.0 ppb (18) 0.09 ppb (1) N/A 2.0 μg/m3 (8) 18.0
 
Sept. 13, 2019, 3 p.m. 1.9 ppb (2) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 23.0 ppb (18) 0.09 ppb (1) N/A 3.0 μg/m3 (12) 18.0
 
Sept. 13, 2019, 2 p.m. 2.2 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (17) 0.09 ppb (1) N/A 3.0 μg/m3 (12) 17.0
 
Sept. 13, 2019, 1 p.m. 2.5 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 20.0 ppb (15) 0.09 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 13, 2019, noon 2.6 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 18.0 ppb (14) 0.07 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 13, 2019, 11 a.m. 2.8 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 15.0 ppb (12) 0.08 ppb (1) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 13, 2019, 10 a.m. 2.3 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 16.0 ppb (12) 0.07 ppb (1) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 13, 2019, 9 a.m. 1.2 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 18.0 ppb (14) 0.06 ppb (1) N/A 3.0 μg/m3 (12) 14.0
 
Sept. 13, 2019, 8 a.m. 1.0 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 20.0 ppb (15) 0.05 ppb (1) N/A 2.0 μg/m3 (8) 15.0
 
Sept. 13, 2019, 7 a.m. 1.1 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 22.0 ppb (17) 0.05 ppb (1) N/A 2.0 μg/m3 (8) 17.0
 
Sept. 13, 2019, 6 a.m. 1.2 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (22) 0.06 ppb (1) N/A 3.0 μg/m3 (12) 22.0
 
Sept. 13, 2019, 5 a.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) 0.07 ppb (1) N/A 1.0 μg/m3 (4) 26.0
 
Sept. 13, 2019, 4 a.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (28) 0.07 ppb (1) N/A 2.0 μg/m3 (8) 28.0
 
Sept. 13, 2019, 3 a.m. 3.5 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) 0.07 ppb (1) N/A 4.0 μg/m3 (17) 28.0
 
Sept. 13, 2019, 2 a.m. 4.3 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) 0.07 ppb (1) N/A 5.0 μg/m3 (21) 27.0
 
Sept. 13, 2019, 1 a.m. 4.7 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) 0.06 ppb (1) N/A 6.0 μg/m3 (25) 27.0
 
Sept. 13, 2019, midnight 8.6 ppb (8) 0.5 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 8.0 ppb (6) 0.16 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 12, 2019, 11 p.m. 7.8 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 6.0 ppb (5) 0.14 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 12, 2019, 10 p.m. 2.9 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 18.0 ppb (14) 0.04 ppb (0) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 12, 2019, 9 p.m. 2.2 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) 0.02 ppb (0) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 12, 2019, 8 p.m. 2.8 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 59.0 ppb (45) 0.03 ppb (0) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 12, 2019, 7 p.m. 2.1 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 61.0 ppb (47) 0.02 ppb (0) N/A 11.0 μg/m3 (46) 47.0
 
Sept. 12, 2019, 6 p.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 61.0 ppb (47) 0.02 ppb (0) N/A 11.0 μg/m3 (46) 47.0
 
Sept. 12, 2019, 5 p.m. 2.1 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 59.0 ppb (45) N/A N/A 13.0 μg/m3 (52) 52.0
 
Sept. 12, 2019, 4 p.m. 2.4 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 55.0 ppb (42) N/A N/A 10.0 μg/m3 (42) 42.0
 
Sept. 12, 2019, 3 p.m. 3.3 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 56.0 ppb (43) N/A N/A 12.0 μg/m3 (50) 50.0
 
Sept. 12, 2019, 2 p.m. 5.2 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 53.0 ppb (41) 0.14 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 12, 2019, 1 p.m. 13.1 ppb (12) 2.5 ppb (2) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 29.0 ppb (22) 0.21 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 12, 2019, noon 18.1 ppb (17) 6.2 ppb (6) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 7.0 ppb (5) 0.25 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 12, 2019, 11 a.m. 7.3 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 7.0 ppb (5) 0.17 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 12, 2019, 10 a.m. 9.2 ppb (9) 0.3 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 9.0 ppb (7) 0.16 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 12, 2019, 9 a.m. 10.4 ppb (10) 0.3 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 12.0 ppb (9) 0.16 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 12, 2019, 8 a.m. 8.5 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 14.0 ppb (11) 0.16 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 12, 2019, 7 a.m. 9.4 ppb (9) 0.3 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 15.0 ppb (12) 0.19 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 12, 2019, 6 a.m. 10.5 ppb (10) 0.3 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 13.0 ppb (10) 0.2 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 12, 2019, 5 a.m. 10.1 ppb (9) 0.3 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 13.0 ppb (10) 0.21 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 12, 2019, 4 a.m. 9.0 ppb (8) 0.2 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 18.0 ppb (14) 0.21 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 12, 2019, 3 a.m. 7.8 ppb (7) 0.3 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 24.0 ppb (18) 0.2 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 12, 2019, 2 a.m. 8.2 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 29.0 ppb (22) 0.19 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 12, 2019, 1 a.m. 9.6 ppb (9) 0.3 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 32.0 ppb (25) 0.21 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 12, 2019, midnight 8.3 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 40.0 ppb (31) 0.2 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 11, 2019, 11 p.m. 6.9 ppb (6) 0.3 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 43.0 ppb (33) 0.19 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 11, 2019, 10 p.m. 6.0 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 54.0 ppb (42) 0.18 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 11, 2019, 9 p.m. 4.4 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 58.0 ppb (45) 0.18 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 11, 2019, 8 p.m. 3.4 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 75.0 ppb (58) 0.18 ppb (2) N/A 10.0 μg/m3 (42) 58.0
 
Sept. 11, 2019, 7 p.m. 3.7 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 80.0 ppb (62) 0.15 ppb (2) N/A 9.0 μg/m3 (38) 62.0
 
Sept. 11, 2019, 6 p.m. 4.5 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 80.0 ppb (62) 0.23 ppb (3) N/A 15.0 μg/m3 (56) 62.0
 
Sept. 11, 2019, 5 p.m. 4.4 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 73.0 ppb (57) 0.18 ppb (2) N/A N/A 57.0
 
Sept. 11, 2019, 4 p.m. 5.0 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 63.0 ppb (48) 0.16 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 11, 2019, 3 p.m. 7.2 ppb (7) 1.2 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 47.0 ppb (36) 0.17 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 11, 2019, 2 p.m. 9.8 ppb (9) 2.4 ppb (2) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 31.0 ppb (24) 0.17 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 11, 2019, 1 p.m. 10.0 ppb (9) 2.4 ppb (2) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 23.0 ppb (18) 0.16 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 11, 2019, noon 9.2 ppb (9) 1.3 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 19.0 ppb (15) 0.13 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 11, 2019, 11 a.m. 6.7 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (15) 0.12 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 11, 2019, 10 a.m. 4.3 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 22.0 ppb (17) 0.09 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 11, 2019, 9 a.m. 2.9 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 26.0 ppb (20) 0.07 ppb (1) N/A 3.0 μg/m3 (12) 20.0
 
Sept. 11, 2019, 8 a.m. 2.7 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 26.0 ppb (20) 0.06 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 11, 2019, 7 a.m. 2.5 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 25.0 ppb (19) 0.06 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 11, 2019, 6 a.m. 2.2 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (17) 0.07 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 11, 2019, 5 a.m. 2.7 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 26.0 ppb (20) 0.07 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 11, 2019, 4 a.m. 2.8 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) 0.06 ppb (1) N/A 5.0 μg/m3 (21) 23.0
 
Sept. 11, 2019, 3 a.m. 3.6 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) 0.07 ppb (1) N/A 5.0 μg/m3 (21) 22.0
 
Sept. 11, 2019, 2 a.m. 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (25) 0.06 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 11, 2019, 1 a.m. 2.2 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (27) 0.06 ppb (1) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 11, 2019, midnight 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (30) 0.06 ppb (1) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 10, 2019, 11 p.m. 1.9 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (32) 0.05 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 10, 2019, 10 p.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) 0.06 ppb (1) N/A 8.0 μg/m3 (33) 35.0
 
Sept. 10, 2019, 9 p.m. 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) 0.04 ppb (0) N/A 7.0 μg/m3 (29) 38.0
 
Sept. 10, 2019, 8 p.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (38) 0.02 ppb (0) N/A 8.0 μg/m3 (33) 38.0
 
Sept. 10, 2019, 7 p.m. 1.6 ppb (1) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 54.0 ppb (42) 0.01 ppb (0) N/A 5.0 μg/m3 (21) 42.0
 
Sept. 10, 2019, 6 p.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 56.0 ppb (43) N/A N/A 4.0 μg/m3 (17) 43.0
 
Sept. 10, 2019, 5 p.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 54.0 ppb (42) N/A N/A 5.0 μg/m3 (21) 42.0
 
Sept. 10, 2019, 4 p.m. 2.0 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 51.0 ppb (39) N/A N/A 6.0 μg/m3 (25) 39.0
 
Sept. 10, 2019, 3 p.m. 3.4 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) N/A N/A 5.0 μg/m3 (21) 35.0
 
Sept. 10, 2019, 2 p.m. 4.3 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A 5.0 μg/m3 (21) 28.0
 
Sept. 10, 2019, 1 p.m. 5.5 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 27.0 ppb (21) N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 10, 2019, noon 9.6 ppb (9) 3.1 ppb (3) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 13.0 ppb (10) N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 10, 2019, 11 a.m. 10.6 ppb (10) 3.5 ppb (3) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 10.0 μg/m3 (42) 42.0
 
Sept. 10, 2019, 10 a.m. 8.3 ppb (8) 0.6 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 3.0 ppb (2) N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 10, 2019, 9 a.m. 5.3 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 4.0 ppb (3) N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 10, 2019, 8 a.m. 3.0 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 7.0 ppb (5) N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 10, 2019, 7 a.m. 3.0 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 7.0 ppb (5) N/A N/A 6.0 μg/m3 (25) 25.0
 
Sept. 10, 2019, 6 a.m. 3.7 ppb (3) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 9.0 ppb (7) N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 10, 2019, 5 a.m. 4.0 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 14.0 ppb (11) N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 10, 2019, 4 a.m. 4.5 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 19.0 ppb (15) N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 10, 2019, 3 a.m. 4.9 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 19.0 ppb (15) N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 10, 2019, 2 a.m. 6.3 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (15) N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 10, 2019, 1 a.m. 5.9 ppb (5) 0.2 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 10, 2019, midnight 5.5 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 9, 2019, 11 p.m. 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 9, 2019, 10 p.m. 1.8 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 8.0 μg/m3 (33) 35.0
 
Sept. 9, 2019, 9 p.m. 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (37) N/A N/A 5.0 μg/m3 (21) 37.0
 
Sept. 9, 2019, 8 p.m. 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (37) N/A N/A 6.0 μg/m3 (25) 37.0
 
Sept. 9, 2019, 7 p.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 54.0 ppb (42) N/A N/A 6.0 μg/m3 (25) 42.0
 
Sept. 9, 2019, 6 p.m. 1.8 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 57.0 ppb (44) N/A N/A 6.0 μg/m3 (25) 44.0
 
Sept. 9, 2019, 5 p.m. 2.2 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 58.0 ppb (45) N/A N/A 8.0 μg/m3 (33) 45.0
 
Sept. 9, 2019, 4 p.m. 2.5 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 52.0 ppb (40) N/A N/A 8.0 μg/m3 (33) 40.0
 
Sept. 9, 2019, 3 p.m. 3.2 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 6.0 μg/m3 (25) 36.0
 
Sept. 9, 2019, 2 p.m. 5.3 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A 6.0 μg/m3 (25) 29.0
 
Sept. 9, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 20.0 ppb (15) N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 9, 2019, noon 19.0 ppb (18) 5.8 ppb (5) N/A 13.0 ppb (12) N/A N/A 9.0 ppb (7) N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 9, 2019, 11 a.m. 7.2 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 8.0 ppb (6) N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 9, 2019, 10 a.m. 6.9 ppb (6) 0.3 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 8.0 ppb (6) N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 9, 2019, 9 a.m. 7.4 ppb (7) 0.2 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 8.0 ppb (6) N/A N/A 10.0 μg/m3 (42) 42.0
 
Sept. 9, 2019, 8 a.m. 6.5 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 9.0 ppb (7) N/A N/A 7.0 μg/m3 (29) 29.0
 
Sept. 9, 2019, 7 a.m. 7.0 ppb (6) 0.2 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 10.0 ppb (8) N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 9, 2019, 6 a.m. 6.9 ppb (6) 0.2 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 13.0 ppb (10) N/A N/A 11.0 μg/m3 (46) 46.0
 
Sept. 9, 2019, 5 a.m. 7.2 ppb (7) 0.2 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 16.0 ppb (12) N/A N/A 11.0 μg/m3 (46) 46.0
 
Sept. 9, 2019, 4 a.m. 7.1 ppb (7) 0.3 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 18.0 ppb (14) N/A N/A 10.0 μg/m3 (42) 42.0
 
Sept. 9, 2019, 3 a.m. 6.0 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 21.0 ppb (16) N/A N/A 12.0 μg/m3 (50) 50.0
 
Sept. 9, 2019, 2 a.m. 4.9 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 27.0 ppb (21) N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 9, 2019, 1 a.m. 3.9 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 9, 2019, midnight 2.7 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) N/A N/A 7.0 μg/m3 (29) 33.0
 
Sept. 8, 2019, 11 p.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 8, 2019, 10 p.m. 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 8, 2019, 9 p.m. 1.3 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) N/A N/A 6.0 μg/m3 (25) 37.0
 
Sept. 8, 2019, 8 p.m. 1.5 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 5.0 μg/m3 (21) 35.0
 
Sept. 8, 2019, 7 p.m. 1.4 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) N/A N/A 4.0 μg/m3 (17) 37.0
 
Sept. 8, 2019, 6 p.m. 1.3 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) N/A N/A 5.0 μg/m3 (21) 37.0
 
Sept. 8, 2019, 5 p.m. 1.3 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 7.0 μg/m3 (29) 36.0
 
Sept. 8, 2019, 4 p.m. 1.4 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) N/A N/A 7.0 μg/m3 (29) 36.0
 
Sept. 8, 2019, 3 p.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A 6.0 μg/m3 (25) 35.0
 
Sept. 8, 2019, 2 p.m. 2.3 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 8, 2019, 1 p.m. 4.9 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 29.0 ppb (22) N/A N/A 11.0 μg/m3 (46) 46.0
 
Sept. 8, 2019, noon 7.3 ppb (7) 2.4 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 9.0 ppb (7) N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 8, 2019, 11 a.m. 6.6 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 4.0 ppb (3) N/A N/A 6.0 μg/m3 (25) 25.0