AQSQID: 410510080

Site Name: Portland - Se Lafayette

Location: Portland, OR

Reporting: True, Located: True

Current AQI: 24.0

Portland OR, US: 45.496641, -122.602877

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 23, 2019, 2 a.m. 8.5 ppb (8) 1.2 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 25.0 ppb (19) 0.2 ppb (2) N/A 5.8 μg/m3 (24) 24.0
 
March 23, 2019, 1 a.m. 9.5 ppb (9) 1.4 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 25.0 ppb (19) 0.2 ppb (2) N/A 6.7 μg/m3 (28) 28.0
 
March 23, 2019, midnight 9.0 ppb (8) 1.8 ppb (2) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (23) 0.2 ppb (2) N/A 7.3 μg/m3 (30) 30.0
 
March 22, 2019, 11 p.m. 12.2 ppb (11) 2.7 ppb (3) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 26.0 ppb (20) 0.2 ppb (2) N/A 13.2 μg/m3 (53) 53.0
 
March 22, 2019, 10 p.m. 16.2 ppb (15) 3.4 ppb (3) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 20.0 ppb (15) 0.2 ppb (2) N/A 15.5 μg/m3 (57) 57.0
 
March 22, 2019, 9 p.m. 16.0 ppb (15) 3.8 ppb (4) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 18.0 ppb (14) 0.2 ppb (2) N/A 10.4 μg/m3 (43) 43.0
 
March 22, 2019, 8 p.m. 14.4 ppb (13) 4.3 ppb (4) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 17.0 ppb (13) 0.2 ppb (2) N/A 8.4 μg/m3 (35) 35.0
 
March 22, 2019, 7 p.m. 15.2 ppb (14) 5.5 ppb (5) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 13.0 ppb (10) 0.2 ppb (2) N/A 7.1 μg/m3 (30) 30.0
 
March 22, 2019, 6 p.m. 21.7 ppb (20) 7.8 ppb (7) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 11.0 ppb (8) 0.2 ppb (2) N/A 5.6 μg/m3 (23) 23.0
 
March 22, 2019, 5 p.m. 21.7 ppb (20) 10.2 ppb (9) N/A 11.0 ppb (10) N/A N/A 15.0 ppb (12) 0.2 ppb (2) N/A 5.2 μg/m3 (22) 22.0
 
March 22, 2019, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 6.0 ppb (5) 0.4 ppb (4) N/A 7.9 μg/m3 (33) 33.0
 
March 22, 2019, 3 p.m. 74.9 ppb (72) 56.0 ppb (52) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 2.0 ppb (2) 0.6 ppb (7) N/A 10.2 μg/m3 (42) 72.0
 
March 22, 2019, 2 p.m. 94.6 ppb (93) 79.0 ppb (77) N/A 16.0 ppb (15) N/A 2.0 ppb (3) 2.0 ppb (2) 0.9 ppb (10) N/A 14.7 μg/m3 (56) 93.0
 
March 22, 2019, 1 p.m. 71.4 ppb (69) 56.0 ppb (52) N/A 15.0 ppb (14) N/A 1.0 ppb (1) 1.0 ppb (1) 0.6 ppb (7) N/A 11.3 μg/m3 (47) 69.0
 
March 22, 2019, noon 58.0 ppb (54) 42.5 ppb (39) N/A 15.0 ppb (14) N/A 1.0 ppb (1) 1.0 ppb (1) 0.6 ppb (7) N/A 12.0 μg/m3 (50) 54.0
 
March 22, 2019, 11 a.m. 40.2 ppb (37) 23.4 ppb (22) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 1.0 ppb (1) 0.4 ppb (4) N/A 11.3 μg/m3 (47) 47.0
 
March 22, 2019, 10 a.m. 39.1 ppb (36) 22.3 ppb (21) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 1.0 ppb (1) 0.4 ppb (4) N/A 12.7 μg/m3 (51) 51.0
 
March 22, 2019, 9 a.m. 38.3 ppb (35) 21.2 ppb (20) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 1.0 ppb (1) 0.5 ppb (6) N/A 13.8 μg/m3 (54) 54.0
 
March 22, 2019, 8 a.m. 29.9 ppb (28) 9.9 ppb (9) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 1.0 ppb (1) 0.4 ppb (4) N/A 13.6 μg/m3 (53) 53.0
 
March 22, 2019, 7 a.m. 28.7 ppb (27) 6.4 ppb (6) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 2.0 ppb (2) 0.4 ppb (4) N/A 14.9 μg/m3 (56) 56.0
 
March 22, 2019, 6 a.m. 23.1 ppb (21) 2.6 ppb (2) N/A 21.0 ppb (19) N/A 0.0 ppb (0) 7.0 ppb (5) 0.3 ppb (3) N/A 15.4 μg/m3 (57) 57.0
 
March 22, 2019, 5 a.m. 13.5 ppb (12) 1.0 ppb (1) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 20.0 ppb (15) 0.2 ppb (2) N/A 10.6 μg/m3 (44) 44.0
 
March 22, 2019, 4 a.m. 10.7 ppb (10) 1.3 ppb (1) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 29.0 ppb (22) 0.2 ppb (2) N/A 7.5 μg/m3 (31) 31.0
 
March 22, 2019, 3 a.m. 8.9 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 34.0 ppb (26) 0.1 ppb (1) N/A 6.3 μg/m3 (26) 26.0
 
March 22, 2019, 2 a.m. 9.6 ppb (9) 1.2 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 34.0 ppb (26) 0.1 ppb (1) N/A 5.2 μg/m3 (22) 26.0
 
March 22, 2019, 1 a.m. 9.0 ppb (8) 1.3 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 38.0 ppb (29) 0.1 ppb (1) N/A 4.7 μg/m3 (20) 29.0
 
March 22, 2019, midnight 8.7 ppb (8) 1.6 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 39.0 ppb (30) 0.1 ppb (1) N/A 5.0 μg/m3 (21) 30.0
 
March 21, 2019, 11 p.m. 7.4 ppb (7) 1.5 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 40.0 ppb (31) 0.1 ppb (1) N/A 4.8 μg/m3 (20) 31.0
 
March 21, 2019, 10 p.m. 6.4 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 41.0 ppb (32) 0.1 ppb (1) N/A 3.8 μg/m3 (16) 32.0
 
March 21, 2019, 9 p.m. 7.0 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 40.0 ppb (31) 0.1 ppb (1) N/A 3.9 μg/m3 (16) 31.0
 
March 21, 2019, 8 p.m. 6.4 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 41.0 ppb (32) 0.1 ppb (1) N/A 3.5 μg/m3 (15) 32.0
 
March 21, 2019, 7 p.m. 8.0 ppb (7) 1.8 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (28) 0.1 ppb (1) N/A 4.7 μg/m3 (20) 28.0
 
March 21, 2019, 6 p.m. 9.9 ppb (9) 2.3 ppb (2) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 34.0 ppb (26) 0.1 ppb (1) N/A 5.6 μg/m3 (23) 26.0
 
March 21, 2019, 5 p.m. 12.2 ppb (11) 2.5 ppb (2) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 30.0 ppb (23) 0.2 ppb (2) N/A 6.2 μg/m3 (26) 26.0
 
March 21, 2019, 4 p.m. 14.6 ppb (14) 2.7 ppb (3) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 27.0 ppb (21) 0.2 ppb (2) N/A 5.9 μg/m3 (25) 25.0
 
March 21, 2019, 3 p.m. 14.6 ppb (14) 1.8 ppb (2) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 26.0 ppb (20) 0.2 ppb (2) N/A 5.4 μg/m3 (23) 23.0
 
March 21, 2019, 2 p.m. 13.8 ppb (13) 1.1 ppb (1) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 24.0 ppb (18) 0.2 ppb (2) N/A 4.6 μg/m3 (19) 19.0
 
March 21, 2019, 1 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 35.0 ppb (27) 0.1 ppb (1) N/A 4.1 μg/m3 (17) 27.0
 
March 21, 2019, noon 4.9 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 38.0 ppb (29) 0.1 ppb (1) N/A 4.2 μg/m3 (18) 29.0
 
March 21, 2019, 11 a.m. 4.3 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) 0.1 ppb (1) N/A 4.3 μg/m3 (18) 28.0
 
March 21, 2019, 10 a.m. 4.8 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (28) 0.1 ppb (1) N/A 4.8 μg/m3 (20) 28.0
 
March 21, 2019, 9 a.m. 5.6 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 36.0 ppb (28) 0.1 ppb (1) N/A 5.5 μg/m3 (23) 28.0
 
March 21, 2019, 8 a.m. 10.9 ppb (10) 1.2 ppb (1) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 29.0 ppb (22) 0.1 ppb (1) N/A 6.3 μg/m3 (26) 26.0
 
March 21, 2019, 7 a.m. 11.0 ppb (10) 1.1 ppb (1) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 31.0 ppb (24) 0.2 ppb (2) N/A 5.6 μg/m3 (23) 24.0
 
March 21, 2019, 6 a.m. 7.3 ppb (7) 0.9 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 42.0 ppb (32) 0.1 ppb (1) N/A 4.4 μg/m3 (18) 32.0
 
March 21, 2019, 5 a.m. 8.6 ppb (8) 0.9 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 43.0 ppb (33) 0.1 ppb (1) N/A 4.3 μg/m3 (18) 33.0
 
March 21, 2019, 4 a.m. 8.6 ppb (8) 0.9 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 45.0 ppb (35) 0.1 ppb (1) N/A 4.4 μg/m3 (18) 35.0
 
March 21, 2019, 3 a.m. 9.7 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 45.0 ppb (35) 0.2 ppb (2) N/A 5.5 μg/m3 (23) 35.0
 
March 21, 2019, 2 a.m. 7.7 ppb (7) 1.1 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 3.7 μg/m3 (15) 38.0
 
March 21, 2019, 1 a.m. 7.3 ppb (7) 1.4 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 52.0 ppb (40) 0.1 ppb (1) N/A 3.3 μg/m3 (14) 40.0
 
March 21, 2019, midnight 7.3 ppb (7) 1.5 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 51.0 ppb (39) 0.1 ppb (1) N/A 3.2 μg/m3 (13) 39.0
 
March 20, 2019, 11 p.m. 6.9 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 52.0 ppb (40) 0.1 ppb (1) N/A 3.0 μg/m3 (12) 40.0
 
March 20, 2019, 10 p.m. 6.6 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 53.0 ppb (41) 0.1 ppb (1) N/A 2.9 μg/m3 (12) 41.0
 
March 20, 2019, 9 p.m. 6.4 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 53.0 ppb (41) 0.1 ppb (1) N/A 2.8 μg/m3 (12) 41.0
 
March 20, 2019, 8 p.m. 6.2 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 53.0 ppb (41) 0.1 ppb (1) N/A 2.8 μg/m3 (12) 41.0
 
March 20, 2019, 7 p.m. 6.3 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 51.0 ppb (39) 0.1 ppb (1) N/A 3.0 μg/m3 (12) 39.0
 
March 20, 2019, 6 p.m. 6.5 ppb (6) 1.8 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 50.0 ppb (38) 0.1 ppb (1) N/A 3.0 μg/m3 (12) 38.0
 
March 20, 2019, 5 p.m. 6.5 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 47.0 ppb (36) 0.1 ppb (1) N/A 3.3 μg/m3 (14) 36.0
 
March 20, 2019, 4 p.m. 7.7 ppb (7) 1.9 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 45.0 ppb (35) 0.1 ppb (1) N/A 3.8 μg/m3 (16) 35.0
 
March 20, 2019, 3 p.m. 8.6 ppb (8) 1.7 ppb (2) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 42.0 ppb (32) 0.1 ppb (1) N/A 5.4 μg/m3 (23) 32.0
 
March 20, 2019, 2 p.m. 8.2 ppb (8) 1.2 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 43.0 ppb (33) 0.1 ppb (1) N/A 5.8 μg/m3 (24) 33.0
 
March 20, 2019, 1 p.m. 6.3 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 46.0 ppb (35) 0.1 ppb (1) N/A 5.0 μg/m3 (21) 35.0
 
March 20, 2019, noon 5.1 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 48.0 ppb (37) 0.1 ppb (1) N/A 4.6 μg/m3 (19) 37.0
 
March 20, 2019, 11 a.m. 4.7 ppb (4) 1.1 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 48.0 ppb (37) 0.1 ppb (1) N/A 4.3 μg/m3 (18) 37.0
 
March 20, 2019, 10 a.m. 4.2 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 4.4 μg/m3 (18) 38.0
 
March 20, 2019, 9 a.m. 4.4 ppb (4) 1.2 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 4.4 μg/m3 (18) 38.0
 
March 20, 2019, 8 a.m. 4.1 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 3.8 μg/m3 (16) 38.0
 
March 20, 2019, 7 a.m. 4.3 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 50.0 ppb (38) 0.1 ppb (1) N/A 3.8 μg/m3 (16) 38.0
 
March 20, 2019, 6 a.m. 4.5 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 3.6 μg/m3 (15) 38.0
 
March 20, 2019, 5 a.m. 5.1 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 50.0 ppb (38) 0.1 ppb (1) N/A 3.7 μg/m3 (15) 38.0
 
March 20, 2019, 4 a.m. 5.2 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 3.5 μg/m3 (15) 38.0
 
March 20, 2019, 3 a.m. 5.5 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 3.5 μg/m3 (15) 38.0
 
March 20, 2019, 2 a.m. 5.5 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 50.0 ppb (38) 0.1 ppb (1) N/A 3.3 μg/m3 (14) 38.0
 
March 20, 2019, 1 a.m. 5.8 ppb (5) 1.3 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 3.2 μg/m3 (13) 38.0
 
March 20, 2019, midnight 5.9 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 3.1 μg/m3 (13) 38.0
 
March 19, 2019, 11 p.m. 6.2 ppb (6) 1.7 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 48.0 ppb (37) 0.1 ppb (1) N/A 3.1 μg/m3 (13) 37.0
 
March 19, 2019, 10 p.m. 6.6 ppb (6) 1.8 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 47.0 ppb (36) 0.1 ppb (1) N/A 3.2 μg/m3 (13) 36.0
 
March 19, 2019, 9 p.m. 6.3 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 47.0 ppb (36) 0.1 ppb (1) N/A 3.4 μg/m3 (14) 36.0
 
March 19, 2019, 8 p.m. 6.2 ppb (6) 1.8 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 47.0 ppb (36) 0.1 ppb (1) N/A 3.5 μg/m3 (15) 36.0
 
March 19, 2019, 7 p.m. 6.2 ppb (6) 1.8 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 46.0 ppb (35) 0.1 ppb (1) N/A 3.7 μg/m3 (15) 35.0
 
March 19, 2019, 6 p.m. 6.6 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 45.0 ppb (35) 0.1 ppb (1) N/A 3.9 μg/m3 (16) 35.0
 
March 19, 2019, 5 p.m. 6.7 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 44.0 ppb (34) 0.1 ppb (1) N/A 4.2 μg/m3 (18) 34.0
 
March 19, 2019, 4 p.m. 7.2 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 44.0 ppb (34) 0.1 ppb (1) N/A 4.3 μg/m3 (18) 34.0
 
March 19, 2019, 3 p.m. 7.8 ppb (7) 1.8 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 44.0 ppb (34) 0.1 ppb (1) N/A 4.5 μg/m3 (19) 34.0
 
March 19, 2019, 2 p.m. 7.3 ppb (7) 1.4 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 44.0 ppb (34) 0.1 ppb (1) N/A 4.6 μg/m3 (19) 34.0
 
March 19, 2019, 1 p.m. 6.4 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 45.0 ppb (35) 0.1 ppb (1) N/A 4.8 μg/m3 (20) 35.0
 
March 19, 2019, noon 5.7 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (35) 0.1 ppb (1) N/A 4.8 μg/m3 (20) 35.0
 
March 19, 2019, 11 a.m. 4.8 ppb (4) 1.1 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 47.0 ppb (36) 0.1 ppb (1) N/A 4.3 μg/m3 (18) 36.0
 
March 19, 2019, 10 a.m. 4.4 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) 0.1 ppb (1) N/A 4.1 μg/m3 (17) 36.0
 
March 19, 2019, 9 a.m. 4.2 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 48.0 ppb (37) 0.1 ppb (1) N/A 4.3 μg/m3 (18) 37.0
 
March 19, 2019, 8 a.m. 4.6 ppb (4) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 48.0 ppb (37) 0.1 ppb (1) N/A 4.5 μg/m3 (19) 37.0
 
March 19, 2019, 7 a.m. 4.3 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 4.3 μg/m3 (18) 38.0
 
March 19, 2019, 6 a.m. 4.4 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 3.7 μg/m3 (15) 38.0
 
March 19, 2019, 5 a.m. 4.4 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 50.0 ppb (38) 0.1 ppb (1) N/A 3.5 μg/m3 (15) 38.0
 
March 19, 2019, 4 a.m. 4.9 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 3.3 μg/m3 (14) 38.0
 
March 19, 2019, 3 a.m. 5.3 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 3.1 μg/m3 (13) 38.0
 
March 19, 2019, 2 a.m. 6.7 ppb (6) 1.1 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 46.0 ppb (35) 0.1 ppb (1) N/A 3.0 μg/m3 (12) 35.0
 
March 19, 2019, 1 a.m. 5.4 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 48.0 ppb (37) 0.1 ppb (1) N/A 2.7 μg/m3 (11) 37.0
 
March 19, 2019, midnight 5.9 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 48.0 ppb (37) 0.1 ppb (1) N/A 2.7 μg/m3 (11) 37.0
 
March 18, 2019, 11 p.m. 5.6 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 48.0 ppb (37) 0.1 ppb (1) N/A 2.7 μg/m3 (11) 37.0
 
March 18, 2019, 10 p.m. 5.8 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 2.8 μg/m3 (12) 38.0
 
March 18, 2019, 9 p.m. 6.0 ppb (6) 1.7 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 2.8 μg/m3 (12) 38.0
 
March 18, 2019, 8 p.m. 6.6 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 49.0 ppb (38) 0.1 ppb (1) N/A 2.9 μg/m3 (12) 38.0
 
March 18, 2019, 7 p.m. 6.6 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 48.0 ppb (37) 0.1 ppb (1) N/A 2.9 μg/m3 (12) 37.0
 
March 18, 2019, 6 p.m. 7.0 ppb (6) 2.1 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 47.0 ppb (36) 0.1 ppb (1) N/A N/A 36.0
 
March 18, 2019, 5 p.m. 7.3 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 46.0 ppb (35) 0.1 ppb (1) N/A N/A 35.0
 
March 18, 2019, 4 p.m. 7.6 ppb (7) 1.9 ppb (2) N/A 6.0 ppb (6) N/A N/A 45.0 ppb (35) 0.1 ppb (1) N/A N/A 35.0
 
March 18, 2019, 3 p.m. 9.1 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A 44.0 ppb (34) 0.1 ppb (1) N/A N/A 34.0
 
March 16, 2019, 2 p.m. 8.1 ppb (8) 1.4 ppb (1) N/A 7.0 ppb (6) N/A N/A 39.0 ppb (30) 0.1 ppb (1) N/A N/A 30.0
 
March 16, 2019, 1 p.m. 6.6 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 41.0 ppb (32) 0.1 ppb (1) N/A N/A 32.0
 
March 16, 2019, noon 5.8 ppb (5) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 42.0 ppb (32) 0.1 ppb (1) N/A N/A 32.0
 
March 16, 2019, 11 a.m. 6.0 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.1 ppb (1) N/A N/A 6.0
 
March 16, 2019, 10 a.m. 5.8 ppb (5) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 43.0 ppb (33) 0.1 ppb (1) N/A N/A 33.0
 
March 16, 2019, 9 a.m. 5.3 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) 0.1 ppb (1) N/A N/A 34.0
 
March 16, 2019, 8 a.m. 4.9 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) 0.1 ppb (1) N/A N/A 34.0
 
March 16, 2019, 7 a.m. 5.2 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) 0.1 ppb (1) N/A N/A 34.0
 
March 16, 2019, 6 a.m. 5.4 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) 0.1 ppb (1) N/A N/A 34.0
 
March 16, 2019, 5 a.m. 5.7 ppb (5) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 43.0 ppb (33) 0.1 ppb (1) N/A N/A 33.0
 
March 16, 2019, 4 a.m. 6.8 ppb (6) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 40.0 ppb (31) 0.1 ppb (1) N/A N/A 31.0
 
March 16, 2019, 3 a.m. 8.2 ppb (8) 1.3 ppb (1) N/A 7.0 ppb (6) N/A N/A 39.0 ppb (30) 0.2 ppb (2) N/A N/A 30.0
 
March 16, 2019, 2 a.m. 10.3 ppb (10) 1.9 ppb (2) N/A 8.0 ppb (7) N/A N/A 37.0 ppb (28) 0.2 ppb (2) N/A N/A 28.0
 
March 16, 2019, 1 a.m. 13.2 ppb (12) 2.4 ppb (2) N/A 11.0 ppb (10) N/A N/A 35.0 ppb (27) 0.2 ppb (2) N/A N/A 27.0
 
March 16, 2019, midnight 18.9 ppb (18) 4.0 ppb (4) N/A 15.0 ppb (14) N/A N/A 31.0 ppb (24) 0.2 ppb (2) N/A N/A 24.0
 
March 15, 2019, 11 p.m. 20.1 ppb (19) 5.4 ppb (5) N/A 15.0 ppb (14) N/A N/A 29.0 ppb (22) 0.2 ppb (2) N/A N/A 22.0
 
March 15, 2019, 10 p.m. 14.7 ppb (14) 4.2 ppb (4) N/A 11.0 ppb (10) N/A N/A 31.0 ppb (24) 0.2 ppb (2) N/A N/A 24.0
 
March 15, 2019, 9 p.m. 13.5 ppb (12) 4.5 ppb (4) N/A 9.0 ppb (8) N/A N/A 32.0 ppb (25) 0.2 ppb (2) N/A N/A 25.0
 
March 15, 2019, 8 p.m. 15.6 ppb (14) 5.6 ppb (5) N/A 10.0 ppb (9) N/A N/A 30.0 ppb (23) 0.2 ppb (2) N/A N/A 23.0
 
March 15, 2019, 7 p.m. 16.6 ppb (15) 6.5 ppb (6) N/A 10.0 ppb (9) N/A N/A 28.0 ppb (22) 0.2 ppb (2) N/A N/A 22.0
 
March 15, 2019, 6 p.m. 17.7 ppb (16) 7.1 ppb (7) N/A 11.0 ppb (10) N/A N/A 25.0 ppb (19) 0.2 ppb (2) N/A N/A 19.0
 
March 15, 2019, 5 p.m. 21.5 ppb (20) 9.0 ppb (8) N/A 13.0 ppb (12) N/A N/A 19.0 ppb (15) 0.2 ppb (2) N/A N/A 20.0
 
March 15, 2019, 4 p.m. 22.5 ppb (21) 8.3 ppb (8) N/A 14.0 ppb (13) N/A N/A 17.0 ppb (13) 0.2 ppb (2) N/A N/A 21.0
 
March 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A N/A 12.0
 
March 15, 2019, 2 p.m. 29.5 ppb (27) 6.3 ppb (6) N/A 23.0 ppb (21) N/A N/A 11.0 ppb (8) 0.3 ppb (3) N/A N/A 27.0
 
March 15, 2019, 1 p.m. 14.6 ppb (14) 2.0 ppb (2) N/A 13.0 ppb (12) N/A N/A 21.0 ppb (16) 0.2 ppb (2) N/A N/A 16.0
 
March 15, 2019, noon 17.5 ppb (16) 1.7 ppb (2) N/A 16.0 ppb (15) N/A N/A 16.0 ppb (12) 0.2 ppb (2) N/A N/A 16.0
 
March 15, 2019, 11 a.m. 12.4 ppb (11) 1.4 ppb (1) N/A 11.0 ppb (10) N/A N/A 22.0 ppb (17) 0.1 ppb (1) N/A N/A 17.0
 
March 15, 2019, 10 a.m. 7.3 ppb (7) 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A 30.0 ppb (23) 0.1 ppb (1) N/A N/A 23.0
 
March 15, 2019, 9 a.m. 7.3 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) 0.1 ppb (1) N/A N/A 24.0
 
March 15, 2019, 8 a.m. 6.7 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.1 ppb (1) N/A N/A 25.0
 
March 15, 2019, 7 a.m. 7.7 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 32.0 ppb (25) 0.1 ppb (1) N/A N/A 25.0
 
March 15, 2019, 6 a.m. 7.6 ppb (7) 1.1 ppb (1) N/A 7.0 ppb (6) N/A N/A 31.0 ppb (24) 0.1 ppb (1) N/A N/A 24.0
 
March 15, 2019, 5 a.m. 9.3 ppb (9) 1.4 ppb (1) N/A 8.0 ppb (7) N/A N/A 31.0 ppb (24) 0.2 ppb (2) N/A N/A 24.0
 
March 15, 2019, 4 a.m. 9.9 ppb (9) 1.3 ppb (1) N/A 9.0 ppb (8) N/A N/A 30.0 ppb (23) 0.2 ppb (2) N/A N/A 23.0
 
March 15, 2019, 3 a.m. 10.0 ppb (9) 1.3 ppb (1) N/A 9.0 ppb (8) N/A N/A 32.0 ppb (25) 0.2 ppb (2) N/A N/A 25.0
 
March 15, 2019, 2 a.m. 12.4 ppb (11) 1.5 ppb (1) N/A 11.0 ppb (10) N/A N/A 30.0 ppb (23) 0.2 ppb (2) N/A N/A 23.0
 
March 15, 2019, 1 a.m. 16.9 ppb (16) 2.0 ppb (2) N/A 15.0 ppb (14) N/A N/A 27.0 ppb (21) 0.2 ppb (2) N/A N/A 21.0
 
March 15, 2019, midnight 9.3 ppb (9) 1.6 ppb (1) N/A 8.0 ppb (7) N/A N/A 37.0 ppb (28) 0.2 ppb (2) N/A N/A 28.0
 
March 14, 2019, 11 p.m. 7.2 ppb (7) 1.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 40.0 ppb (31) 0.1 ppb (1) N/A N/A 31.0
 
March 14, 2019, 10 p.m. 6.4 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (30) 0.1 ppb (1) N/A N/A 30.0
 
March 14, 2019, 9 p.m. 7.1 ppb (7) 2.4 ppb (2) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) 0.1 ppb (1) N/A N/A 28.0
 
March 14, 2019, 8 p.m. 6.9 ppb (6) 2.5 ppb (2) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.1 ppb (1) N/A N/A 26.0
 
March 14, 2019, 6 p.m. 14.3 ppb (13) 6.1 ppb (6) N/A 8.0 ppb (7) N/A N/A 24.0 ppb (18) 0.2 ppb (2) N/A N/A 18.0
 
March 14, 2019, 5 p.m. 24.8 ppb (23) 10.8 ppb (10) N/A 14.0 ppb (13) N/A N/A 11.0 ppb (8) 0.3 ppb (3) N/A N/A 23.0
 
March 14, 2019, 4 p.m. 21.5 ppb (20) 7.6 ppb (7) N/A 14.0 ppb (13) N/A N/A 14.0 ppb (11) 0.2 ppb (2) N/A N/A 20.0
 
March 14, 2019, 3 p.m. 39.3 ppb (36) 20.4 ppb (19) N/A 19.0 ppb (18) N/A N/A 6.0 ppb (5) 0.3 ppb (3) N/A N/A 36.0
 
March 14, 2019, 2 p.m. 80.8 ppb (79) 58.5 ppb (55) N/A 22.0 ppb (20) N/A N/A 1.0 ppb (1) 0.6 ppb (7) N/A N/A 79.0
 
March 14, 2019, 1 p.m. 53.9 ppb (50) 33.7 ppb (31) N/A 20.0 ppb (19) N/A N/A 1.0 ppb (1) 0.4 ppb (4) N/A N/A 50.0
 
March 14, 2019, noon 41.7 ppb (39) 22.0 ppb (20) N/A 20.0 ppb (19) N/A N/A 1.0 ppb (1) 0.3 ppb (3) N/A N/A 39.0
 
March 14, 2019, 11 a.m. 27.2 ppb (25) 8.1 ppb (8) N/A 19.0 ppb (18) N/A N/A 2.0 ppb (2) 0.3 ppb (3) N/A N/A 25.0
 
March 14, 2019, 10 a.m. 25.4 ppb (24) 7.2 ppb (7) N/A 18.0 ppb (17) N/A N/A 2.0 ppb (2) 0.3 ppb (3) N/A N/A 24.0
 
March 14, 2019, 9 a.m. 29.8 ppb (28) 12.0 ppb (11) N/A 18.0 ppb (17) N/A N/A 2.0 ppb (2) 0.4 ppb (4) N/A N/A 28.0
 
March 14, 2019, 8 a.m. 23.5 ppb (22) 6.4 ppb (6) N/A 17.0 ppb (16) N/A N/A 2.0 ppb (2) 0.3 ppb (3) N/A N/A 22.0
 
March 14, 2019, 7 a.m. 16.5 ppb (15) 1.9 ppb (2) N/A 15.0 ppb (14) N/A N/A 6.0 ppb (5) 0.2 ppb (2) N/A N/A 15.0
 
March 14, 2019, 6 a.m. 20.1 ppb (19) 2.6 ppb (2) N/A 17.0 ppb (16) N/A N/A 8.0 ppb (6) 0.3 ppb (3) N/A N/A 19.0
 
March 14, 2019, 5 a.m. 16.7 ppb (15) 1.6 ppb (1) N/A 15.0 ppb (14) N/A N/A 18.0 ppb (14) 0.2 ppb (2) N/A N/A 15.0
 
March 14, 2019, 4 a.m. 15.1 ppb (14) 1.6 ppb (1) N/A 14.0 ppb (13) N/A N/A 22.0 ppb (17) 0.2 ppb (2) N/A N/A 17.0
 
March 14, 2019, 3 a.m. 14.1 ppb (13) 1.5 ppb (1) N/A 13.0 ppb (12) N/A N/A 25.0 ppb (19) 0.2 ppb (2) N/A N/A 19.0
 
March 14, 2019, 2 a.m. 15.5 ppb (14) 1.5 ppb (1) N/A 14.0 ppb (13) N/A N/A 23.0 ppb (18) 0.2 ppb (2) N/A N/A 18.0