AQSQID: 410670005

Site Name: Portland Near Road

Location: Tualatin, OR

Reporting: True, Located: True

Current AQI: 32.0

Tualatin OR, US: 45.39916, -122.7455

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 19, 2019, 1 p.m. 3.7 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) 0.1 ppb (1) N/A 4.5 μg/m3 (19) 32.0
 
March 19, 2019, noon 3.0 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (33) 0.1 ppb (1) N/A 4.4 μg/m3 (18) 33.0
 
March 19, 2019, 11 a.m. 2.0 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) 0.1 ppb (1) N/A 4.1 μg/m3 (17) 35.0
 
March 19, 2019, 10 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) 0.1 ppb (1) N/A 4.3 μg/m3 (18) 35.0
 
March 19, 2019, 9 a.m. 2.2 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) 0.1 ppb (1) N/A 4.3 μg/m3 (18) 35.0
 
March 19, 2019, 8 a.m. 2.4 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) 0.1 ppb (1) N/A 4.0 μg/m3 (17) 35.0
 
March 19, 2019, 7 a.m. 4.9 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 42.0 ppb (32) 0.1 ppb (1) N/A 3.9 μg/m3 (16) 32.0
 
March 19, 2019, 6 a.m. 2.6 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) 0.1 ppb (1) N/A 3.7 μg/m3 (15) 35.0
 
March 19, 2019, 5 a.m. 2.5 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.1 ppb (1) N/A 3.7 μg/m3 (15) 15.0
 
March 19, 2019, 4 a.m. 3.0 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A N/A 0.1 ppb (1) N/A 3.7 μg/m3 (15) 15.0
 
March 19, 2019, 3 a.m. 2.7 ppb (3) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.1 ppb (1) N/A 3.5 μg/m3 (15) 15.0
 
March 19, 2019, 2 a.m. 2.4 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.1 ppb (1) N/A 3.5 μg/m3 (15) 15.0
 
March 19, 2019, 1 a.m. 2.9 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A N/A 0.1 ppb (1) N/A 3.4 μg/m3 (14) 14.0
 
March 19, 2019, midnight 5.0 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 46.0 ppb (35) 0.1 ppb (1) N/A 3.3 μg/m3 (14) 35.0
 
March 18, 2019, 11 p.m. 3.1 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) 0.1 ppb (1) N/A 3.3 μg/m3 (14) 38.0
 
March 18, 2019, 10 p.m. 4.8 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 48.0 ppb (37) 0.1 ppb (1) N/A 3.4 μg/m3 (14) 37.0
 
March 18, 2019, 9 p.m. 4.8 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 48.0 ppb (37) 0.1 ppb (1) N/A 3.5 μg/m3 (15) 37.0
 
March 18, 2019, 8 p.m. 2.6 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) 0.1 ppb (1) N/A 3.5 μg/m3 (15) 38.0
 
March 18, 2019, 7 p.m. 3.2 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 48.0 ppb (37) 0.1 ppb (1) N/A 3.6 μg/m3 (15) 37.0
 
March 18, 2019, 6 p.m. 4.3 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) 0.1 ppb (1) N/A 3.8 μg/m3 (16) 36.0
 
March 18, 2019, 5 p.m. 4.5 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) 0.1 ppb (1) N/A 3.6 μg/m3 (15) 35.0
 
March 18, 2019, 4 p.m. 5.9 ppb (5) 1.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 43.0 ppb (33) 0.1 ppb (1) N/A 4.1 μg/m3 (17) 33.0
 
March 18, 2019, 3 p.m. 8.3 ppb (8) 1.2 ppb (1) N/A 7.0 ppb (6) N/A N/A 41.0 ppb (32) 0.1 ppb (1) N/A 6.8 μg/m3 (28) 32.0
 
March 16, 2019, 2 p.m. 28.1 ppb (26) 5.3 ppb (5) N/A 23.0 ppb (21) N/A N/A 12.0 ppb (9) 0.2 ppb (2) N/A 10.9 μg/m3 (45) 45.0
 
March 16, 2019, 1 p.m. 35.2 ppb (33) 8.8 ppb (8) N/A 26.0 ppb (24) N/A N/A 14.0 ppb (11) 0.3 ppb (3) N/A 10.8 μg/m3 (45) 45.0
 
March 16, 2019, noon 6.3 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 38.0 ppb (29) 0.1 ppb (1) N/A 10.0 μg/m3 (42) 42.0
 
March 16, 2019, 11 a.m. 3.6 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) 0.1 ppb (1) N/A 9.1 μg/m3 (38) 38.0
 
March 16, 2019, 10 a.m. 4.9 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 40.0 ppb (31) 0.1 ppb (1) N/A 7.6 μg/m3 (32) 32.0
 
March 16, 2019, 9 a.m. 4.7 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) 0.1 ppb (1) N/A 6.5 μg/m3 (27) 32.0
 
March 16, 2019, 8 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) 0.1 ppb (1) N/A 5.2 μg/m3 (22) 32.0
 
March 16, 2019, 7 a.m. 4.6 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) 0.1 ppb (1) N/A 4.5 μg/m3 (19) 32.0
 
March 16, 2019, 6 a.m. 3.5 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) 0.1 ppb (1) N/A 4.2 μg/m3 (18) 32.0
 
March 16, 2019, 5 a.m. 4.7 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (30) 0.0 ppb (0) N/A 3.7 μg/m3 (15) 30.0
 
March 16, 2019, 4 a.m. 6.5 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A N/A 38.0 ppb (29) 0.0 ppb (0) N/A 3.4 μg/m3 (14) 29.0
 
March 16, 2019, 3 a.m. 10.5 ppb (10) 1.6 ppb (1) N/A 9.0 ppb (8) N/A N/A 34.0 ppb (26) 0.0 ppb (0) N/A 3.8 μg/m3 (16) 26.0
 
March 16, 2019, 2 a.m. 14.0 ppb (13) 1.1 ppb (1) N/A 13.0 ppb (12) N/A N/A 29.0 ppb (22) 0.0 ppb (0) N/A 4.8 μg/m3 (20) 22.0
 
March 16, 2019, 1 a.m. 20.9 ppb (19) 1.8 ppb (2) N/A 19.0 ppb (18) N/A N/A 22.0 ppb (17) 0.1 ppb (1) N/A 5.3 μg/m3 (22) 22.0
 
March 16, 2019, midnight 19.5 ppb (18) 2.6 ppb (2) N/A 17.0 ppb (16) N/A N/A 28.0 ppb (22) 0.1 ppb (1) N/A 5.4 μg/m3 (23) 23.0
 
March 15, 2019, 11 p.m. 19.2 ppb (18) 4.7 ppb (4) N/A 14.0 ppb (13) N/A N/A 31.0 ppb (24) 0.1 ppb (1) N/A 4.7 μg/m3 (20) 24.0
 
March 15, 2019, 10 p.m. 22.7 ppb (21) 7.8 ppb (7) N/A 15.0 ppb (14) N/A N/A 29.0 ppb (22) 0.2 ppb (2) N/A 4.4 μg/m3 (18) 22.0
 
March 15, 2019, 9 p.m. 22.9 ppb (21) 10.0 ppb (9) N/A 13.0 ppb (12) N/A N/A 29.0 ppb (22) 0.2 ppb (2) N/A 4.3 μg/m3 (18) 22.0
 
March 15, 2019, 8 p.m. 28.7 ppb (27) 5.2 ppb (5) N/A 23.0 ppb (21) N/A N/A 29.0 ppb (22) 0.2 ppb (2) N/A 4.2 μg/m3 (18) 27.0
 
March 15, 2019, 7 p.m. 33.3 ppb (31) 25.1 ppb (23) N/A 8.0 ppb (7) N/A N/A 25.0 ppb (19) 0.2 ppb (2) N/A 4.8 μg/m3 (20) 31.0
 
March 15, 2019, 6 p.m. 19.2 ppb (18) 8.1 ppb (8) N/A 11.0 ppb (10) N/A N/A 24.0 ppb (18) 0.2 ppb (2) N/A 4.8 μg/m3 (20) 20.0
 
March 15, 2019, 5 p.m. 14.6 ppb (14) 4.8 ppb (4) N/A 10.0 ppb (9) N/A N/A 25.0 ppb (19) 0.2 ppb (2) N/A 3.9 μg/m3 (16) 19.0
 
March 15, 2019, 4 p.m. 26.3 ppb (24) 11.9 ppb (11) N/A 14.0 ppb (13) N/A N/A 20.0 ppb (15) 0.2 ppb (2) N/A 3.9 μg/m3 (16) 24.0
 
March 15, 2019, 3 p.m. 34.7 ppb (32) 17.9 ppb (17) N/A 17.0 ppb (16) N/A N/A 18.0 ppb (14) 0.3 ppb (3) N/A 4.0 μg/m3 (17) 32.0
 
March 15, 2019, 2 p.m. 74.4 ppb (72) 44.4 ppb (41) N/A 30.0 ppb (28) N/A N/A 2.0 ppb (2) 0.5 ppb (6) N/A 9.9 μg/m3 (41) 72.0
 
March 15, 2019, 1 p.m. 38.1 ppb (35) 15.5 ppb (14) N/A 23.0 ppb (21) N/A N/A 10.0 ppb (8) 0.2 ppb (2) N/A 3.6 μg/m3 (15) 35.0
 
March 15, 2019, noon 68.5 ppb (65) 35.8 ppb (33) N/A 33.0 ppb (31) N/A N/A 3.0 ppb (2) 0.3 ppb (3) N/A 4.2 μg/m3 (18) 65.0
 
March 15, 2019, 11 a.m. 48.3 ppb (45) 19.0 ppb (18) N/A 29.0 ppb (27) N/A N/A 5.0 ppb (4) 0.2 ppb (2) N/A 3.8 μg/m3 (16) 45.0
 
March 15, 2019, 10 a.m. 33.6 ppb (31) 10.4 ppb (10) N/A 23.0 ppb (21) N/A N/A 9.0 ppb (7) 0.2 ppb (2) N/A 3.6 μg/m3 (15) 31.0
 
March 15, 2019, 9 a.m. 19.4 ppb (18) 2.7 ppb (3) N/A 17.0 ppb (16) N/A N/A 17.0 ppb (13) 0.2 ppb (2) N/A 3.5 μg/m3 (15) 18.0
 
March 15, 2019, 8 a.m. 14.8 ppb (14) 2.4 ppb (2) N/A 12.0 ppb (11) N/A N/A 23.0 ppb (18) 0.2 ppb (2) N/A 3.5 μg/m3 (15) 18.0
 
March 15, 2019, 7 a.m. 5.3 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (24) 0.1 ppb (1) N/A 3.4 μg/m3 (14) 24.0
 
March 15, 2019, 6 a.m. 9.5 ppb (9) 0.8 ppb (1) N/A 9.0 ppb (8) N/A N/A 26.0 ppb (20) 0.1 ppb (1) N/A 3.6 μg/m3 (15) 20.0
 
March 15, 2019, 5 a.m. 12.9 ppb (12) 0.7 ppb (1) N/A 12.0 ppb (11) N/A N/A 19.0 ppb (15) 0.2 ppb (2) N/A 4.2 μg/m3 (18) 18.0
 
March 15, 2019, 4 a.m. 22.1 ppb (20) 4.8 ppb (4) N/A 17.0 ppb (16) N/A N/A 18.0 ppb (14) 0.3 ppb (3) N/A 4.3 μg/m3 (18) 20.0
 
March 15, 2019, 3 a.m. 23.3 ppb (22) 4.3 ppb (4) N/A 19.0 ppb (18) N/A N/A 18.0 ppb (14) 0.2 ppb (2) N/A 4.1 μg/m3 (17) 22.0
 
March 15, 2019, 2 a.m. 13.7 ppb (13) 0.2 ppb (0) N/A 13.0 ppb (12) N/A N/A 21.0 ppb (16) 0.2 ppb (2) N/A 4.6 μg/m3 (19) 19.0
 
March 15, 2019, 1 a.m. 9.9 ppb (9) 0.5 ppb (0) N/A 9.0 ppb (8) N/A N/A 29.0 ppb (22) 0.2 ppb (2) N/A 3.5 μg/m3 (15) 22.0
 
March 15, 2019, midnight 15.7 ppb (15) 4.0 ppb (4) N/A 12.0 ppb (11) N/A N/A 29.0 ppb (22) 0.2 ppb (2) N/A 3.4 μg/m3 (14) 22.0
 
March 14, 2019, 11 p.m. 20.1 ppb (19) 7.4 ppb (7) N/A 13.0 ppb (12) N/A N/A 29.0 ppb (22) 0.2 ppb (2) N/A 3.4 μg/m3 (14) 22.0
 
March 14, 2019, 10 p.m. 18.9 ppb (18) 7.4 ppb (7) N/A 11.0 ppb (10) N/A N/A 30.0 ppb (23) 0.2 ppb (2) N/A 3.3 μg/m3 (14) 23.0
 
March 14, 2019, 9 p.m. 16.5 ppb (15) 6.7 ppb (6) N/A 10.0 ppb (9) N/A N/A 31.0 ppb (24) 0.2 ppb (2) N/A 3.4 μg/m3 (14) 24.0
 
March 14, 2019, 8 p.m. 17.9 ppb (17) 7.9 ppb (7) N/A 10.0 ppb (9) N/A N/A 27.0 ppb (21) 0.2 ppb (2) N/A 3.9 μg/m3 (16) 21.0
 
March 14, 2019, 7 p.m. 31.5 ppb (29) 17.3 ppb (16) N/A 14.0 ppb (13) N/A N/A 21.0 ppb (16) 0.3 ppb (3) N/A 4.3 μg/m3 (18) 29.0
 
March 14, 2019, 6 p.m. 34.9 ppb (32) 20.0 ppb (19) N/A 15.0 ppb (14) N/A N/A 14.0 ppb (11) 0.3 ppb (3) N/A 5.2 μg/m3 (22) 32.0
 
March 14, 2019, 5 p.m. 20.9 ppb (19) 10.0 ppb (9) N/A 11.0 ppb (10) N/A N/A 15.0 ppb (12) 0.2 ppb (2) N/A 4.6 μg/m3 (19) 19.0
 
March 14, 2019, 4 p.m. 36.9 ppb (34) 21.8 ppb (20) N/A 15.0 ppb (14) N/A N/A 8.0 ppb (6) 0.3 ppb (3) N/A 5.3 μg/m3 (22) 34.0
 
March 14, 2019, 3 p.m. 49.8 ppb (46) 33.2 ppb (31) N/A 17.0 ppb (16) N/A N/A 2.0 ppb (2) 0.4 ppb (4) N/A 6.8 μg/m3 (28) 46.0
 
March 14, 2019, 2 p.m. 66.2 ppb (63) 49.7 ppb (46) N/A 17.0 ppb (16) N/A N/A 1.0 ppb (1) 0.5 ppb (6) N/A 8.5 μg/m3 (35) 63.0
 
March 14, 2019, 1 p.m. 98.4 ppb (97) 76.4 ppb (74) N/A 22.0 ppb (20) N/A N/A 0.0 ppb (0) 0.6 ppb (7) N/A 7.4 μg/m3 (31) 97.0
 
March 14, 2019, noon 44.3 ppb (41) 24.2 ppb (22) N/A 20.0 ppb (19) N/A N/A 1.0 ppb (1) 0.3 ppb (3) N/A 6.5 μg/m3 (27) 41.0
 
March 14, 2019, 11 a.m. 22.8 ppb (21) 6.4 ppb (6) N/A 16.0 ppb (15) N/A N/A 2.0 ppb (2) 0.2 ppb (2) N/A 5.3 μg/m3 (22) 22.0
 
March 14, 2019, 10 a.m. 18.3 ppb (17) 5.7 ppb (5) N/A 13.0 ppb (12) N/A N/A 3.0 ppb (2) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 14, 2019, 9 a.m. 17.7 ppb (16) 3.4 ppb (3) N/A 14.0 ppb (13) N/A N/A 1.0 ppb (1) 0.2 ppb (2) N/A 5.2 μg/m3 (22) 22.0
 
March 14, 2019, 8 a.m. 29.1 ppb (27) 10.8 ppb (10) N/A 18.0 ppb (17) N/A N/A 1.0 ppb (1) 0.3 ppb (3) N/A 6.1 μg/m3 (25) 27.0
 
March 14, 2019, 7 a.m. 30.2 ppb (28) 11.2 ppb (10) N/A 19.0 ppb (18) N/A N/A 2.0 ppb (2) 0.3 ppb (3) N/A 7.3 μg/m3 (30) 30.0
 
March 14, 2019, 6 a.m. 18.8 ppb (17) 1.0 ppb (1) N/A 18.0 ppb (17) N/A N/A 5.0 ppb (4) 0.3 ppb (3) N/A 7.5 μg/m3 (31) 31.0
 
March 14, 2019, 5 a.m. 19.3 ppb (18) 1.8 ppb (2) N/A 18.0 ppb (17) N/A N/A 8.0 ppb (6) 0.3 ppb (3) N/A 5.9 μg/m3 (25) 25.0
 
March 14, 2019, 4 a.m. 13.9 ppb (13) 1.1 ppb (1) N/A 13.0 ppb (12) N/A N/A 20.0 ppb (15) 0.2 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 14, 2019, 3 a.m. 16.0 ppb (15) 2.2 ppb (2) N/A 14.0 ppb (13) N/A N/A 21.0 ppb (16) 0.2 ppb (2) N/A 3.9 μg/m3 (16) 16.0
 
March 14, 2019, 2 a.m. 14.1 ppb (13) 3.0 ppb (3) N/A 11.0 ppb (10) N/A N/A 25.0 ppb (19) 0.2 ppb (2) N/A 3.5 μg/m3 (15) 19.0
 
March 14, 2019, 1 a.m. 35.9 ppb (33) 15.7 ppb (15) N/A 20.0 ppb (19) N/A N/A 19.0 ppb (15) 0.4 ppb (4) N/A 3.8 μg/m3 (16) 33.0
 
March 14, 2019, midnight 24.4 ppb (23) 10.1 ppb (9) N/A 14.0 ppb (13) N/A N/A 27.0 ppb (21) 0.3 ppb (3) N/A 3.7 μg/m3 (15) 23.0
 
March 13, 2019, 11 p.m. 23.8 ppb (22) 11.2 ppb (10) N/A 13.0 ppb (12) N/A N/A 29.0 ppb (22) 0.3 ppb (3) N/A 3.4 μg/m3 (14) 22.0
 
March 13, 2019, 10 p.m. 21.8 ppb (20) 10.8 ppb (10) N/A 11.0 ppb (10) N/A N/A 30.0 ppb (23) 0.3 ppb (3) N/A 3.4 μg/m3 (14) 23.0
 
March 13, 2019, 9 p.m. 20.4 ppb (19) 10.1 ppb (9) N/A 10.0 ppb (9) N/A N/A 30.0 ppb (23) 0.2 ppb (2) N/A 3.3 μg/m3 (14) 23.0
 
March 13, 2019, 8 p.m. 30.2 ppb (28) 16.8 ppb (16) N/A 13.0 ppb (12) N/A N/A 26.0 ppb (20) 0.2 ppb (2) N/A 3.3 μg/m3 (14) 28.0
 
March 13, 2019, 7 p.m. 37.6 ppb (35) 21.8 ppb (20) N/A 16.0 ppb (15) N/A N/A 24.0 ppb (18) 0.3 ppb (3) N/A 3.4 μg/m3 (14) 35.0
 
March 13, 2019, 6 p.m. 31.3 ppb (29) 18.8 ppb (17) N/A 13.0 ppb (12) N/A N/A 21.0 ppb (16) 0.2 ppb (2) N/A 4.0 μg/m3 (17) 29.0
 
March 13, 2019, 5 p.m. 43.3 ppb (40) 25.1 ppb (23) N/A 18.0 ppb (17) N/A N/A 13.0 ppb (10) 0.3 ppb (3) N/A 5.0 μg/m3 (21) 40.0
 
March 13, 2019, 4 p.m. 23.1 ppb (21) 8.1 ppb (8) N/A 15.0 ppb (14) N/A N/A 13.0 ppb (10) 0.2 ppb (2) N/A 3.9 μg/m3 (16) 21.0
 
March 13, 2019, 3 p.m. 35.1 ppb (32) 17.5 ppb (16) N/A 18.0 ppb (17) N/A N/A 11.0 ppb (8) 0.3 ppb (3) N/A 4.6 μg/m3 (19) 32.0
 
March 13, 2019, 2 p.m. 17.3 ppb (16) 3.6 ppb (3) N/A 14.0 ppb (13) N/A N/A 13.0 ppb (10) 0.2 ppb (2) N/A 3.7 μg/m3 (15) 16.0
 
March 13, 2019, 1 p.m. 23.9 ppb (22) 7.2 ppb (7) N/A 17.0 ppb (16) N/A N/A 7.0 ppb (5) 0.2 ppb (2) N/A 3.7 μg/m3 (15) 22.0
 
March 13, 2019, noon 21.7 ppb (20) 6.7 ppb (6) N/A 15.0 ppb (14) N/A N/A 6.0 ppb (5) 0.2 ppb (2) N/A 3.4 μg/m3 (14) 20.0
 
March 13, 2019, 11 a.m. 17.1 ppb (16) 4.6 ppb (4) N/A 13.0 ppb (12) N/A N/A 8.0 ppb (6) 0.2 ppb (2) N/A 3.4 μg/m3 (14) 16.0
 
March 13, 2019, 10 a.m. 14.5 ppb (13) 2.1 ppb (2) N/A 12.0 ppb (11) N/A N/A 8.0 ppb (6) 0.2 ppb (2) N/A 3.7 μg/m3 (15) 15.0
 
March 13, 2019, 9 a.m. 7.4 ppb (7) 0.6 ppb (1) N/A 7.0 ppb (6) N/A N/A 19.0 ppb (15) 0.2 ppb (2) N/A 3.7 μg/m3 (15) 15.0
 
March 13, 2019, 8 a.m. 15.7 ppb (15) 2.5 ppb (2) N/A 13.0 ppb (12) N/A N/A 14.0 ppb (11) 0.2 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 13, 2019, 7 a.m. 13.9 ppb (13) 2.0 ppb (2) N/A 12.0 ppb (11) N/A N/A 16.0 ppb (12) 0.2 ppb (2) N/A 4.2 μg/m3 (18) 18.0
 
March 13, 2019, 6 a.m. 16.9 ppb (16) 1.4 ppb (1) N/A 15.0 ppb (14) N/A N/A 11.0 ppb (8) 0.3 ppb (3) N/A 4.7 μg/m3 (20) 20.0
 
March 13, 2019, 5 a.m. 18.2 ppb (17) 1.8 ppb (2) N/A 16.0 ppb (15) N/A N/A 13.0 ppb (10) 0.3 ppb (3) N/A 4.9 μg/m3 (20) 20.0
 
March 13, 2019, 4 a.m. 37.8 ppb (35) 15.1 ppb (14) N/A 23.0 ppb (21) N/A N/A 13.0 ppb (10) 0.4 ppb (4) N/A 4.5 μg/m3 (19) 35.0
 
March 13, 2019, 3 a.m. 27.6 ppb (26) 6.1 ppb (6) N/A 21.0 ppb (19) N/A N/A 14.0 ppb (11) 0.4 ppb (4) N/A 4.8 μg/m3 (20) 26.0
 
March 13, 2019, 2 a.m. 35.5 ppb (33) 15.5 ppb (14) N/A 20.0 ppb (19) N/A N/A 21.0 ppb (16) 0.3 ppb (3) N/A 3.3 μg/m3 (14) 33.0
 
March 13, 2019, 1 a.m. 32.0 ppb (30) 14.6 ppb (14) N/A 17.0 ppb (16) N/A N/A 24.0 ppb (18) 0.4 ppb (4) N/A 3.6 μg/m3 (15) 30.0
 
March 13, 2019, midnight 27.0 ppb (25) 13.1 ppb (12) N/A 14.0 ppb (13) N/A N/A 31.0 ppb (24) 0.3 ppb (3) N/A 3.0 μg/m3 (12) 25.0
 
March 12, 2019, 11 p.m. 29.0 ppb (27) 15.0 ppb (14) N/A 14.0 ppb (13) N/A N/A 31.0 ppb (24) 0.3 ppb (3) N/A 3.1 μg/m3 (13) 27.0
 
March 12, 2019, 10 p.m. 29.0 ppb (27) 16.2 ppb (15) N/A 13.0 ppb (12) N/A N/A 32.0 ppb (25) 0.3 ppb (3) N/A 3.1 μg/m3 (13) 27.0
 
March 12, 2019, 9 p.m. 39.4 ppb (36) 22.9 ppb (21) N/A 16.0 ppb (15) N/A N/A 29.0 ppb (22) 0.3 ppb (3) N/A 3.5 μg/m3 (15) 36.0
 
March 12, 2019, 8 p.m. 32.6 ppb (30) 17.9 ppb (17) N/A 15.0 ppb (14) N/A N/A 30.0 ppb (23) 0.2 ppb (2) N/A 3.4 μg/m3 (14) 30.0
 
March 12, 2019, 7 p.m. 38.0 ppb (35) 22.2 ppb (21) N/A 16.0 ppb (15) N/A N/A 30.0 ppb (23) 0.2 ppb (2) N/A 3.4 μg/m3 (14) 35.0
 
March 12, 2019, 6 p.m. 37.5 ppb (35) 20.2 ppb (19) N/A 17.0 ppb (16) N/A N/A 28.0 ppb (22) 0.2 ppb (2) N/A 3.3 μg/m3 (14) 35.0
 
March 12, 2019, 5 p.m. 51.9 ppb (48) 30.4 ppb (28) N/A 22.0 ppb (20) N/A N/A 20.0 ppb (15) 0.3 ppb (3) N/A 3.6 μg/m3 (15) 48.0
 
March 12, 2019, 4 p.m. 65.8 ppb (63) 38.3 ppb (35) N/A 27.0 ppb (25) N/A N/A 11.0 ppb (8) 0.3 ppb (3) N/A 5.6 μg/m3 (23) 63.0
 
March 12, 2019, 3 p.m. 85.5 ppb (84) 52.5 ppb (49) N/A 33.0 ppb (31) N/A N/A 4.0 ppb (3) 0.5 ppb (6) N/A 5.9 μg/m3 (25) 84.0
 
March 12, 2019, 2 p.m. 77.7 ppb (75) 42.8 ppb (40) N/A 35.0 ppb (32) N/A N/A 4.0 ppb (3) 0.5 ppb (6) N/A 5.4 μg/m3 (23) 75.0
 
March 12, 2019, 1 p.m. 71.7 ppb (69) 39.2 ppb (36) N/A 33.0 ppb (31) N/A N/A 8.0 ppb (6) 0.4 ppb (4) N/A 4.5 μg/m3 (19) 69.0
 
March 12, 2019, noon 51.3 ppb (48) 25.6 ppb (24) N/A 26.0 ppb (24) N/A N/A 16.0 ppb (12) 0.3 ppb (3) N/A 4.1 μg/m3 (17) 48.0
 
March 12, 2019, 11 a.m. 21.0 ppb (19) 7.2 ppb (7) N/A 14.0 ppb (13) N/A N/A 30.0 ppb (23) 0.1 ppb (1) N/A 3.1 μg/m3 (13) 23.0
 
March 12, 2019, 10 a.m. 3.4 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.1 ppb (1) N/A 2.7 μg/m3 (11) 29.0
 
March 12, 2019, 9 a.m. 2.4 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (28) 0.1 ppb (1) N/A 2.9 μg/m3 (12) 28.0
 
March 12, 2019, 8 a.m. 3.4 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.1 ppb (1) N/A 2.7 μg/m3 (11) 29.0
 
March 12, 2019, 7 a.m. 7.5 ppb (7) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 38.0 ppb (29) 0.1 ppb (1) N/A 2.8 μg/m3 (12) 29.0
 
March 12, 2019, 6 a.m. 10.7 ppb (10) 2.5 ppb (2) N/A 8.0 ppb (7) N/A N/A 37.0 ppb (28) 0.1 ppb (1) N/A 3.1 μg/m3 (13) 28.0
 
March 12, 2019, 5 a.m. 11.3 ppb (10) 2.5 ppb (2) N/A 9.0 ppb (8) N/A N/A 36.0 ppb (28) 0.1 ppb (1) N/A 2.9 μg/m3 (12) 28.0
 
March 12, 2019, 4 a.m. 15.9 ppb (15) 5.1 ppb (5) N/A 11.0 ppb (10) N/A N/A 30.0 ppb (23) 0.2 ppb (2) N/A 3.5 μg/m3 (15) 23.0
 
March 12, 2019, 3 a.m. 27.3 ppb (25) 9.7 ppb (9) N/A 18.0 ppb (17) N/A N/A 20.0 ppb (15) 0.3 ppb (3) N/A 6.8 μg/m3 (28) 28.0
 
March 12, 2019, 2 a.m. 35.5 ppb (33) 9.8 ppb (9) N/A 26.0 ppb (24) N/A N/A 13.0 ppb (10) 0.4 ppb (4) N/A 9.4 μg/m3 (39) 39.0
 
March 12, 2019, 1 a.m. 35.5 ppb (33) 10.4 ppb (10) N/A 25.0 ppb (23) N/A N/A 14.0 ppb (11) 0.3 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 12, 2019, midnight 19.3 ppb (18) 5.0 ppb (5) N/A 14.0 ppb (13) N/A N/A 25.0 ppb (19) 0.3 ppb (3) N/A 7.9 μg/m3 (33) 33.0
 
March 11, 2019, 11 p.m. 24.3 ppb (23) 8.5 ppb (8) N/A 16.0 ppb (15) N/A N/A 23.0 ppb (18) 0.3 ppb (3) N/A 7.5 μg/m3 (31) 31.0
 
March 11, 2019, 10 p.m. 22.8 ppb (21) 10.1 ppb (9) N/A 13.0 ppb (12) N/A N/A 26.0 ppb (20) 0.2 ppb (2) N/A 6.5 μg/m3 (27) 27.0
 
March 11, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) 0.2 ppb (2) N/A 5.9 μg/m3 (25) 25.0
 
March 11, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) 0.2 ppb (2) N/A 4.9 μg/m3 (20) 20.0
 
March 11, 2019, 7 p.m. 30.4 ppb (28) 16.5 ppb (15) N/A 14.0 ppb (13) N/A N/A N/A 0.2 ppb (2) N/A 5.4 μg/m3 (23) 28.0
 
March 11, 2019, 6 p.m. 27.5 ppb (25) 13.2 ppb (12) N/A 14.0 ppb (13) N/A N/A 22.0 ppb (17) 0.2 ppb (2) N/A 6.1 μg/m3 (25) 25.0
 
March 11, 2019, 5 p.m. 48.4 ppb (45) 24.5 ppb (23) N/A 24.0 ppb (22) N/A N/A 14.0 ppb (11) 0.3 ppb (3) N/A 8.8 μg/m3 (37) 45.0
 
March 11, 2019, 4 p.m. 95.6 ppb (94) 62.1 ppb (59) N/A 34.0 ppb (31) N/A N/A 6.0 ppb (5) 0.6 ppb (7) N/A 11.4 μg/m3 (48) 94.0
 
March 11, 2019, 3 p.m. 174.7 ppb (114) 133.8 ppb (106) N/A 41.0 ppb (38) N/A N/A 2.0 ppb (2) 1.0 ppb (11) N/A 12.4 μg/m3 (51) 114.0
 
March 11, 2019, 2 p.m. 108.2 ppb (101) 74.3 ppb (72) N/A 34.0 ppb (31) N/A N/A 1.0 ppb (1) 0.7 ppb (8) N/A 9.8 μg/m3 (41) 101.0
 
March 11, 2019, 1 p.m. 101.0 ppb (100) 67.3 ppb (64) N/A 34.0 ppb (31) N/A N/A 1.0 ppb (1) 0.5 ppb (6) N/A 9.0 μg/m3 (38) 100.0
 
March 11, 2019, noon 68.2 ppb (65) 35.1 ppb (32) N/A 33.0 ppb (31) N/A N/A 1.0 ppb (1) 0.3 ppb (3) N/A 8.5 μg/m3 (35) 65.0
 
March 11, 2019, 11 a.m. 61.7 ppb (58) 26.2 ppb (24) N/A 36.0 ppb (33) N/A N/A 3.0 ppb (2) 0.2 ppb (2) N/A 7.1 μg/m3 (30) 58.0
 
March 11, 2019, 10 a.m. 40.2 ppb (37) 11.6 ppb (11) N/A 29.0 ppb (27) N/A N/A 13.0 ppb (10) 0.1 ppb (1) N/A 6.4 μg/m3 (27) 37.0
 
March 11, 2019, 9 a.m. 10.9 ppb (10) 2.2 ppb (2) N/A 9.0 ppb (8) N/A N/A 34.0 ppb (26) 0.1 ppb (1) N/A 6.3 μg/m3 (26) 26.0
 
March 11, 2019, 8 a.m. 3.8 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) 0.1 ppb (1) N/A 6.2 μg/m3 (26) 31.0
 
March 11, 2019, 7 a.m. 17.5 ppb (16) 1.8 ppb (2) N/A 16.0 ppb (15) N/A N/A 26.0 ppb (20) 0.2 ppb (2) N/A 5.5 μg/m3 (23) 23.0
 
March 11, 2019, 6 a.m. 9.7 ppb (9) 1.4 ppb (1) N/A 8.0 ppb (7) N/A N/A 35.0 ppb (27) 0.1 ppb (1) N/A 4.7 μg/m3 (20) 27.0
 
March 11, 2019, 5 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (32) 0.1 ppb (1) N/A 4.3 μg/m3 (18) 32.0
 
March 11, 2019, 4 a.m. 4.8 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) 0.1 ppb (1) N/A 4.2 μg/m3 (18) 31.0
 
March 11, 2019, 3 a.m. 4.5 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) 0.1 ppb (1) N/A 4.5 μg/m3 (19) 31.0
 
March 11, 2019, 2 a.m. 6.1 ppb (6) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (30) 0.1 ppb (1) N/A 4.4 μg/m3 (18) 30.0
 
March 11, 2019, 1 a.m. 2.0 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) 0.1 ppb (1) N/A 3.6 μg/m3 (15) 34.0
 
March 11, 2019, midnight 3.1 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) 0.1 ppb (1) N/A 3.9 μg/m3 (16) 34.0
 
March 10, 2019, 11 p.m. 3.0 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) 0.1 ppb (1) N/A 4.4 μg/m3 (18) 34.0
 
March 10, 2019, 10 p.m. 5.3 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) 0.1 ppb (1) N/A 5.1 μg/m3 (21) 33.0
 
March 10, 2019, 9 p.m. 3.5 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) 0.1 ppb (1) N/A 5.1 μg/m3 (21) 34.0
 
March 10, 2019, 8 p.m. 2.5 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) 0.1 ppb (1) N/A 5.4 μg/m3 (23) 34.0
 
March 10, 2019, 7 p.m. 3.0 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (33) 0.1 ppb (1) N/A 5.6 μg/m3 (23) 33.0
 
March 10, 2019, 6 p.m. 2.8 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) 0.1 ppb (1) N/A 6.2 μg/m3 (26) 34.0
 
March 10, 2019, 5 p.m. 3.5 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (33) 0.1 ppb (1) N/A 7.2 μg/m3 (30) 33.0
 
March 10, 2019, 4 p.m. 7.7 ppb (7) 1.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 38.0 ppb (29) 0.1 ppb (1) N/A 7.8 μg/m3 (32) 32.0
 
March 10, 2019, 3 p.m. 8.7 ppb (8) 0.8 ppb (1) N/A 8.0 ppb (7) N/A N/A 35.0 ppb (27) 0.1 ppb (1) N/A 7.7 μg/m3 (32) 32.0
 
March 10, 2019, 2 p.m. 17.7 ppb (16) 2.4 ppb (2) N/A 15.0 ppb (14) N/A N/A 26.0 ppb (20) 0.1 ppb (1) N/A 7.5 μg/m3 (31) 31.0