AQSQID: 530330080

Site Name: Seattle-Beacon Hill

Location: Seattle, WA

Reporting: True, Located: True

Current AQI: 23.0

Seattle WA, US: 47.568236, -122.308628

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 21, 2019, 3 p.m. N/A 1.0 ppb (1) 6.9 ppb (6) 6.0 ppb (6) N/A 1.0 ppb (1) 30.0 ppb (23) 0.18 ppb (2) N/A 2.1 μg/m3 (9) 23.0
 
May 21, 2019, 2 p.m. N/A 0.5 ppb (0) 5.4 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (1) 27.0 ppb (21) 0.19 ppb (2) N/A 1.0 μg/m3 (4) 21.0
 
May 21, 2019, 1 p.m. N/A 0.1 ppb (0) 3.2 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 28.0 ppb (22) 0.15 ppb (2) N/A 0.7 μg/m3 (3) 22.0
 
May 21, 2019, noon N/A 0.0 ppb (0) 3.9 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 27.0 ppb (21) 0.15 ppb (2) N/A 0.9 μg/m3 (4) 21.0
 
May 21, 2019, 11 a.m. N/A 0.0 ppb (0) 4.1 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 29.0 ppb (22) 0.15 ppb (2) N/A 3.1 μg/m3 (13) 22.0
 
May 21, 2019, 10 a.m. N/A 0.0 ppb (0) 2.4 ppb (2) 3.0 ppb (3) N/A 1.0 ppb (1) N/A 0.15 ppb (2) N/A 2.1 μg/m3 (9) 9.0
 
May 21, 2019, 9 a.m. N/A 0.0 ppb (0) 1.9 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 33.0 ppb (25) 0.14 ppb (2) N/A 0.6 μg/m3 (2) 25.0
 
May 21, 2019, 8 a.m. N/A 0.0 ppb (0) 1.6 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 35.0 ppb (27) N/A N/A 1.6 μg/m3 (7) 27.0
 
May 21, 2019, 7 a.m. N/A 0.1 ppb (0) 1.6 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 35.0 ppb (27) N/A N/A 1.9 μg/m3 (8) 27.0
 
May 21, 2019, 6 a.m. N/A 0.0 ppb (0) 1.4 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 40.0 ppb (31) 0.14 ppb (2) N/A 0.5 μg/m3 (2) 31.0
 
May 21, 2019, 5 a.m. N/A 0.1 ppb (0) 2.6 ppb (2) 3.0 ppb (3) N/A 1.0 ppb (1) 37.0 ppb (28) 0.15 ppb (2) N/A 1.7 μg/m3 (7) 28.0
 
May 21, 2019, 4 a.m. N/A 0.1 ppb (0) 3.3 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 39.0 ppb (30) 0.17 ppb (2) N/A 2.4 μg/m3 (10) 30.0
 
May 21, 2019, 3 a.m. N/A 0.2 ppb (0) 6.4 ppb (6) 7.0 ppb (6) N/A 1.0 ppb (1) 33.0 ppb (25) 0.22 ppb (2) N/A 2.9 μg/m3 (12) 25.0
 
May 21, 2019, 2 a.m. N/A 0.3 ppb (0) 6.2 ppb (6) 6.0 ppb (6) N/A 1.0 ppb (1) 34.0 ppb (26) 0.19 ppb (2) N/A 2.0 μg/m3 (8) 26.0
 
May 21, 2019, 1 a.m. N/A 0.4 ppb (0) 7.3 ppb (7) 7.0 ppb (6) N/A 1.0 ppb (1) 35.0 ppb (27) 0.18 ppb (2) N/A 2.3 μg/m3 (10) 27.0
 
May 21, 2019, midnight N/A 0.5 ppb (0) 5.7 ppb (5) 6.0 ppb (6) N/A 1.0 ppb (1) 40.0 ppb (31) 0.16 ppb (2) N/A 1.7 μg/m3 (7) 31.0
 
May 20, 2019, 11 p.m. N/A 0.4 ppb (0) 3.7 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 41.0 ppb (32) 0.16 ppb (2) N/A 1.4 μg/m3 (6) 32.0
 
May 20, 2019, 10 p.m. N/A 0.6 ppb (1) 4.1 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) N/A 0.15 ppb (2) N/A 4.4 μg/m3 (18) 18.0
 
May 20, 2019, 9 p.m. N/A 0.6 ppb (1) 3.6 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) N/A 0.15 ppb (2) N/A 3.3 μg/m3 (14) 14.0
 
May 20, 2019, 8 p.m. N/A 0.6 ppb (1) 3.9 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 39.0 ppb (30) 0.15 ppb (2) N/A 3.0 μg/m3 (12) 30.0
 
May 20, 2019, 7 p.m. N/A 0.7 ppb (1) 4.3 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 35.0 ppb (27) 0.15 ppb (2) N/A 1.6 μg/m3 (7) 27.0
 
May 20, 2019, 6 p.m. N/A N/A N/A 5.0 ppb (5) N/A 1.0 ppb (1) 36.0 ppb (28) 0.15 ppb (2) N/A 0.5 μg/m3 (2) 28.0
 
May 20, 2019, 5 p.m. N/A 0.8 ppb (1) 7.0 ppb (6) 7.0 ppb (6) N/A 1.0 ppb (1) 34.0 ppb (26) 0.16 ppb (2) N/A 2.4 μg/m3 (10) 26.0
 
May 20, 2019, 4 p.m. N/A 1.0 ppb (1) 7.5 ppb (7) 7.0 ppb (6) N/A 1.0 ppb (1) 32.0 ppb (25) 0.16 ppb (2) N/A 1.1 μg/m3 (5) 25.0
 
May 20, 2019, 3 p.m. N/A 1.5 ppb (1) 10.9 ppb (10) 10.0 ppb (9) N/A 1.0 ppb (1) 27.0 ppb (21) 0.17 ppb (2) N/A 1.4 μg/m3 (6) 21.0
 
May 20, 2019, 2 p.m. N/A 0.5 ppb (0) 8.0 ppb (7) 8.0 ppb (7) N/A 1.0 ppb (1) 31.0 ppb (24) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 24.0
 
May 20, 2019, 1 p.m. N/A 0.2 ppb (0) 7.1 ppb (7) 8.0 ppb (7) N/A 1.0 ppb (1) 30.0 ppb (23) 0.15 ppb (2) N/A 2.8 μg/m3 (12) 23.0
 
May 20, 2019, noon N/A 0.1 ppb (0) 2.5 ppb (2) 3.0 ppb (3) N/A 1.0 ppb (1) 35.0 ppb (27) 0.13 ppb (1) N/A 1.8 μg/m3 (8) 27.0
 
May 20, 2019, 11 a.m. N/A 0.1 ppb (0) 2.3 ppb (2) 3.0 ppb (3) N/A 1.0 ppb (1) 34.0 ppb (26) 0.13 ppb (1) N/A 0.9 μg/m3 (4) 26.0
 
May 20, 2019, 10 a.m. N/A 0.1 ppb (0) 1.5 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 35.0 ppb (27) 0.12 ppb (1) N/A 0.7 μg/m3 (3) 27.0
 
May 20, 2019, 9 a.m. N/A 0.0 ppb (0) 1.2 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) 0.12 ppb (1) N/A 1.5 μg/m3 (6) 26.0
 
May 20, 2019, 8 a.m. N/A 0.1 ppb (0) 1.5 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 32.0 ppb (25) 0.13 ppb (1) N/A 2.0 μg/m3 (8) 25.0
 
May 20, 2019, 7 a.m. N/A 0.1 ppb (0) 1.8 ppb (2) 2.0 ppb (2) N/A N/A 32.0 ppb (25) 0.13 ppb (1) N/A 2.5 μg/m3 (10) 25.0
 
May 20, 2019, 6 a.m. N/A 0.1 ppb (0) 9.7 ppb (9) 9.0 ppb (8) N/A N/A 28.0 ppb (22) 0.15 ppb (2) N/A 3.9 μg/m3 (16) 22.0
 
May 20, 2019, 5 a.m. N/A 0.6 ppb (1) 17.8 ppb (16) 19.0 ppb (18) N/A 1.0 ppb (1) 24.0 ppb (18) 0.16 ppb (2) N/A 3.9 μg/m3 (16) 18.0
 
May 20, 2019, 4 a.m. N/A 0.1 ppb (0) 9.1 ppb (8) 9.0 ppb (8) N/A 1.0 ppb (1) 30.0 ppb (23) 0.16 ppb (2) N/A 3.7 μg/m3 (15) 23.0
 
May 20, 2019, 3 a.m. N/A 0.3 ppb (0) 14.5 ppb (13) 15.0 ppb (14) N/A 1.0 ppb (1) 30.0 ppb (23) 0.17 ppb (2) N/A 4.6 μg/m3 (19) 23.0
 
May 20, 2019, 2 a.m. N/A 0.3 ppb (0) 9.0 ppb (8) 9.0 ppb (8) N/A 1.0 ppb (1) 39.0 ppb (30) 0.17 ppb (2) N/A 4.4 μg/m3 (18) 30.0
 
May 20, 2019, 1 a.m. N/A 2.7 ppb (3) 10.7 ppb (10) 8.0 ppb (7) N/A 1.0 ppb (1) 40.0 ppb (31) 0.17 ppb (2) N/A 3.1 μg/m3 (13) 31.0
 
May 20, 2019, midnight N/A 0.9 ppb (1) 5.3 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) 46.0 ppb (35) 0.16 ppb (2) N/A 2.3 μg/m3 (10) 35.0
 
May 19, 2019, 11 p.m. N/A 0.4 ppb (0) 2.5 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) 46.0 ppb (35) 0.15 ppb (2) N/A 3.7 μg/m3 (15) 35.0
 
May 19, 2019, 10 p.m. N/A 0.4 ppb (0) 2.4 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) 48.0 ppb (37) 0.14 ppb (2) N/A 4.7 μg/m3 (20) 37.0
 
May 19, 2019, 9 p.m. N/A 1.4 ppb (1) 5.5 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) 44.0 ppb (34) 0.15 ppb (2) N/A 1.4 μg/m3 (6) 34.0
 
May 19, 2019, 8 p.m. N/A 2.5 ppb (2) 8.0 ppb (7) 6.0 ppb (6) N/A 1.0 ppb (1) 38.0 ppb (29) 0.14 ppb (2) N/A 3.9 μg/m3 (16) 29.0
 
May 19, 2019, 7 p.m. N/A N/A N/A 6.0 ppb (6) N/A 1.0 ppb (1) 36.0 ppb (28) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 28.0
 
May 19, 2019, 6 p.m. N/A N/A N/A 13.0 ppb (12) N/A 1.0 ppb (1) 25.0 ppb (19) 0.17 ppb (2) N/A 3.7 μg/m3 (15) 19.0
 
May 19, 2019, 5 p.m. N/A 5.7 ppb (5) 14.4 ppb (13) 10.0 ppb (9) N/A 1.0 ppb (1) 26.0 ppb (20) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 20.0
 
May 19, 2019, 4 p.m. N/A 0.6 ppb (1) 3.6 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 31.0 ppb (24) 0.15 ppb (2) N/A 2.3 μg/m3 (10) 24.0
 
May 19, 2019, 3 p.m. N/A 0.7 ppb (1) 5.3 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (1) 28.0 ppb (22) 0.15 ppb (2) N/A 2.0 μg/m3 (8) 22.0
 
May 19, 2019, 2 p.m. N/A 0.7 ppb (1) 8.0 ppb (7) 7.0 ppb (6) N/A 1.0 ppb (1) 26.0 ppb (20) 0.16 ppb (2) N/A 4.4 μg/m3 (18) 20.0
 
May 19, 2019, 1 p.m. N/A 8.5 ppb (8) 28.3 ppb (26) 21.0 ppb (19) N/A 1.0 ppb (1) 14.0 ppb (11) 0.17 ppb (2) N/A 4.2 μg/m3 (18) 26.0
 
May 19, 2019, noon N/A 1.3 ppb (1) 15.7 ppb (15) 16.0 ppb (15) N/A 1.0 ppb (1) 18.0 ppb (14) 0.15 ppb (2) N/A 2.5 μg/m3 (10) 15.0
 
May 19, 2019, 11 a.m. N/A 0.1 ppb (0) 10.6 ppb (10) 11.0 ppb (10) N/A 1.0 ppb (1) 22.0 ppb (17) 0.19 ppb (2) N/A 3.2 μg/m3 (13) 17.0
 
May 19, 2019, 10 a.m. N/A 0.1 ppb (0) 8.5 ppb (8) 9.0 ppb (8) N/A 1.0 ppb (1) N/A 0.19 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
May 19, 2019, 9 a.m. N/A 0.1 ppb (0) 8.9 ppb (8) 9.0 ppb (8) N/A 1.0 ppb (1) 25.0 ppb (19) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
May 19, 2019, 8 a.m. N/A 0.1 ppb (0) 10.3 ppb (10) 10.0 ppb (9) N/A 1.0 ppb (1) 26.0 ppb (20) N/A N/A 5.3 μg/m3 (22) 22.0
 
May 19, 2019, 7 a.m. N/A 0.1 ppb (0) 15.2 ppb (14) 16.0 ppb (15) N/A 1.0 ppb (1) 25.0 ppb (19) N/A N/A 2.9 μg/m3 (12) 19.0
 
May 19, 2019, 6 a.m. N/A 0.1 ppb (0) 13.9 ppb (13) 14.0 ppb (13) N/A 2.0 ppb (3) 28.0 ppb (22) 0.19 ppb (2) N/A 1.4 μg/m3 (6) 22.0
 
May 19, 2019, 5 a.m. N/A 0.1 ppb (0) 10.1 ppb (9) 10.0 ppb (9) N/A 1.0 ppb (1) 32.0 ppb (25) 0.22 ppb (2) N/A 2.2 μg/m3 (9) 25.0
 
May 19, 2019, 4 a.m. N/A 0.1 ppb (0) 7.2 ppb (7) 7.0 ppb (6) N/A 1.0 ppb (1) 38.0 ppb (29) 0.22 ppb (2) N/A 2.5 μg/m3 (10) 29.0
 
May 19, 2019, 3 a.m. N/A 0.2 ppb (0) 5.4 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (1) 42.0 ppb (32) 0.21 ppb (2) N/A 3.0 μg/m3 (12) 32.0
 
May 19, 2019, 2 a.m. N/A 0.3 ppb (0) 6.2 ppb (6) 6.0 ppb (6) N/A 1.0 ppb (1) 40.0 ppb (31) 0.2 ppb (2) N/A 0.5 μg/m3 (2) 31.0
 
May 19, 2019, 1 a.m. N/A 0.5 ppb (0) 6.2 ppb (6) 6.0 ppb (6) N/A 1.0 ppb (1) 41.0 ppb (32) 0.18 ppb (2) N/A 1.8 μg/m3 (8) 32.0
 
May 19, 2019, midnight N/A 1.7 ppb (2) 10.4 ppb (10) 9.0 ppb (8) N/A 1.0 ppb (1) 39.0 ppb (30) 0.16 ppb (2) N/A 2.2 μg/m3 (9) 30.0
 
May 18, 2019, 11 p.m. N/A 3.6 ppb (3) 13.2 ppb (12) 11.0 ppb (10) N/A 1.0 ppb (1) 37.0 ppb (28) 0.15 ppb (2) N/A 0.5 μg/m3 (2) 28.0
 
May 18, 2019, 10 p.m. N/A 1.3 ppb (1) 5.4 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) 44.0 ppb (34) 0.15 ppb (2) N/A 1.9 μg/m3 (8) 34.0
 
May 18, 2019, 9 p.m. N/A 2.4 ppb (2) 8.6 ppb (8) 6.0 ppb (6) N/A 1.0 ppb (1) 41.0 ppb (32) 0.17 ppb (2) N/A 3.0 μg/m3 (12) 32.0
 
May 18, 2019, 8 p.m. N/A 4.0 ppb (4) 11.8 ppb (11) 9.0 ppb (8) N/A 1.0 ppb (1) 37.0 ppb (28) 0.17 ppb (2) N/A 2.7 μg/m3 (11) 28.0
 
May 18, 2019, 7 p.m. N/A 2.6 ppb (2) 7.7 ppb (7) 6.0 ppb (6) N/A 1.0 ppb (1) 38.0 ppb (29) 0.17 ppb (2) N/A 1.9 μg/m3 (8) 29.0
 
May 18, 2019, 6 p.m. N/A N/A N/A 8.0 ppb (7) N/A 1.0 ppb (1) 33.0 ppb (25) 0.17 ppb (2) N/A 2.3 μg/m3 (10) 25.0
 
May 18, 2019, 5 p.m. N/A 12.1 ppb (11) 24.5 ppb (23) 14.0 ppb (13) N/A 1.0 ppb (1) 23.0 ppb (18) 0.2 ppb (2) N/A 0.7 μg/m3 (3) 23.0
 
May 18, 2019, 4 p.m. N/A 28.1 ppb (26) 49.0 ppb (45) 23.0 ppb (21) N/A 1.0 ppb (1) 11.0 ppb (8) 0.24 ppb (3) N/A 7.6 μg/m3 (32) 45.0
 
May 18, 2019, 3 p.m. N/A 2.4 ppb (2) 7.3 ppb (7) 5.0 ppb (5) N/A 1.0 ppb (1) 20.0 ppb (15) 0.18 ppb (2) N/A 1.9 μg/m3 (8) 15.0
 
May 18, 2019, 2 p.m. N/A 1.5 ppb (1) 6.3 ppb (6) 5.0 ppb (5) N/A 1.0 ppb (1) 21.0 ppb (16) 0.18 ppb (2) N/A 3.2 μg/m3 (13) 16.0
 
May 18, 2019, 1 p.m. N/A 0.6 ppb (1) 5.7 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (1) 18.0 ppb (14) 0.18 ppb (2) N/A 3.6 μg/m3 (15) 15.0
 
May 18, 2019, noon N/A 0.3 ppb (0) 5.4 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (1) 19.0 ppb (15) 0.19 ppb (2) N/A 2.4 μg/m3 (10) 15.0
 
May 18, 2019, 11 a.m. N/A 0.1 ppb (0) 6.8 ppb (6) 7.0 ppb (6) N/A 1.0 ppb (1) 19.0 ppb (15) 0.2 ppb (2) N/A 4.6 μg/m3 (19) 19.0
 
May 18, 2019, 10 a.m. N/A 0.1 ppb (0) 9.9 ppb (9) 10.0 ppb (9) N/A 1.0 ppb (1) 21.0 ppb (16) 0.19 ppb (2) N/A 4.4 μg/m3 (18) 18.0
 
May 18, 2019, 9 a.m. N/A 0.1 ppb (0) 11.9 ppb (11) 13.0 ppb (12) N/A 1.0 ppb (1) 21.0 ppb (16) 0.18 ppb (2) N/A 3.4 μg/m3 (14) 16.0
 
May 18, 2019, 8 a.m. N/A 0.1 ppb (0) 5.2 ppb (5) 6.0 ppb (6) N/A 1.0 ppb (1) 30.0 ppb (23) 0.15 ppb (2) N/A 1.5 μg/m3 (6) 23.0
 
May 18, 2019, 7 a.m. N/A 0.1 ppb (0) 5.8 ppb (5) 6.0 ppb (6) N/A N/A 30.0 ppb (23) 0.15 ppb (2) N/A 1.3 μg/m3 (5) 23.0
 
May 18, 2019, 6 a.m. N/A 0.1 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A N/A 30.0 ppb (23) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 23.0
 
May 18, 2019, 5 a.m. N/A 0.1 ppb (0) 6.0 ppb (6) 6.0 ppb (6) N/A 1.0 ppb (1) 30.0 ppb (23) 0.17 ppb (2) N/A 2.6 μg/m3 (11) 23.0
 
May 18, 2019, 4 a.m. N/A 0.1 ppb (0) 5.1 ppb (5) 6.0 ppb (6) N/A 1.0 ppb (1) 33.0 ppb (25) 0.17 ppb (2) N/A 2.7 μg/m3 (11) 25.0
 
May 18, 2019, 3 a.m. N/A 0.2 ppb (0) 5.3 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (1) 36.0 ppb (28) 0.14 ppb (2) N/A 1.9 μg/m3 (8) 28.0
 
May 18, 2019, 2 a.m. N/A 0.4 ppb (0) 4.8 ppb (4) 5.0 ppb (5) N/A 1.0 ppb (1) 36.0 ppb (28) 0.14 ppb (2) N/A 3.1 μg/m3 (13) 28.0
 
May 18, 2019, 1 a.m. N/A 0.5 ppb (0) 3.8 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 38.0 ppb (29) 0.14 ppb (2) N/A 2.4 μg/m3 (10) 29.0
 
May 18, 2019, midnight N/A 0.4 ppb (0) 2.2 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 41.0 ppb (32) 0.14 ppb (2) N/A 3.5 μg/m3 (15) 32.0
 
May 17, 2019, 11 p.m. N/A 0.5 ppb (0) 2.1 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 42.0 ppb (32) 0.13 ppb (1) N/A 1.9 μg/m3 (8) 32.0
 
May 17, 2019, 10 p.m. N/A 0.5 ppb (0) 2.1 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 43.0 ppb (33) 0.13 ppb (1) N/A 2.7 μg/m3 (11) 33.0
 
May 17, 2019, 9 p.m. N/A 0.5 ppb (0) 1.9 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) 43.0 ppb (33) 0.13 ppb (1) N/A 1.2 μg/m3 (5) 33.0
 
May 17, 2019, 8 p.m. N/A 0.8 ppb (1) 2.5 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 42.0 ppb (32) 0.13 ppb (1) N/A 5.1 μg/m3 (21) 32.0
 
May 17, 2019, 7 p.m. N/A N/A N/A 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) 0.13 ppb (1) N/A 2.7 μg/m3 (11) 30.0
 
May 17, 2019, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A 1.0 ppb (1) 38.0 ppb (29) 0.13 ppb (1) N/A 1.5 μg/m3 (6) 29.0
 
May 17, 2019, 5 p.m. N/A 0.8 ppb (1) 2.9 ppb (3) 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.13 ppb (1) N/A 1.0 μg/m3 (4) 29.0
 
May 17, 2019, 4 p.m. N/A 0.8 ppb (1) 3.6 ppb (3) 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.13 ppb (1) N/A 1.2 μg/m3 (5) 28.0
 
May 17, 2019, 3 p.m. N/A 0.7 ppb (1) 4.2 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 34.0 ppb (26) 0.13 ppb (1) N/A 0.5 μg/m3 (2) 26.0
 
May 17, 2019, 2 p.m. N/A 0.4 ppb (0) 5.4 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (1) 31.0 ppb (24) 0.13 ppb (1) N/A 1.6 μg/m3 (7) 24.0
 
May 17, 2019, 1 p.m. N/A 0.2 ppb (0) 4.8 ppb (4) 5.0 ppb (5) N/A 1.0 ppb (1) 31.0 ppb (24) 0.13 ppb (1) N/A 1.0 μg/m3 (4) 24.0
 
May 17, 2019, noon N/A 0.1 ppb (0) 2.4 ppb (2) 3.0 ppb (3) N/A 1.0 ppb (1) 32.0 ppb (25) 0.12 ppb (1) N/A 0.3 μg/m3 (1) 25.0
 
May 17, 2019, 11 a.m. N/A 0.1 ppb (0) 2.6 ppb (2) 3.0 ppb (3) N/A 1.0 ppb (1) 30.0 ppb (23) 0.12 ppb (1) N/A 2.0 μg/m3 (8) 23.0
 
May 17, 2019, 10 a.m. N/A 0.1 ppb (0) 1.4 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) N/A 0.11 ppb (1) N/A 0.0 μg/m3 (0) 2.0
 
May 17, 2019, 9 a.m. N/A 0.1 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 25.0 ppb (19) 0.11 ppb (1) N/A 1.3 μg/m3 (5) 19.0
 
May 17, 2019, 8 a.m. N/A 0.1 ppb (0) 2.3 ppb (2) 3.0 ppb (3) N/A 1.0 ppb (1) 24.0 ppb (18) N/A N/A 1.8 μg/m3 (8) 18.0
 
May 17, 2019, 7 a.m. N/A 0.1 ppb (0) 1.6 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 25.0 ppb (19) N/A N/A 1.0 μg/m3 (4) 19.0
 
May 17, 2019, 6 a.m. N/A 0.1 ppb (0) 2.1 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 25.0 ppb (19) 0.12 ppb (1) N/A 0.5 μg/m3 (2) 19.0
 
May 17, 2019, 5 a.m. N/A 0.1 ppb (0) 1.9 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 26.0 ppb (20) 0.12 ppb (1) N/A 2.3 μg/m3 (10) 20.0
 
May 17, 2019, 4 a.m. N/A 0.1 ppb (0) 2.7 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 26.0 ppb (20) 0.12 ppb (1) N/A 1.8 μg/m3 (8) 20.0
 
May 17, 2019, 3 a.m. N/A 0.2 ppb (0) 3.8 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 23.0 ppb (18) 0.15 ppb (2) N/A 1.8 μg/m3 (8) 18.0
 
May 17, 2019, 2 a.m. N/A 0.5 ppb (0) 6.0 ppb (6) 6.0 ppb (6) N/A 1.0 ppb (1) 21.0 ppb (16) 0.18 ppb (2) N/A 3.6 μg/m3 (15) 16.0
 
May 17, 2019, 1 a.m. N/A 0.9 ppb (1) 7.7 ppb (7) 7.0 ppb (6) N/A 1.0 ppb (1) 23.0 ppb (18) 0.18 ppb (2) N/A 7.1 μg/m3 (30) 30.0
 
May 17, 2019, midnight N/A 4.3 ppb (4) 16.6 ppb (15) 12.0 ppb (11) N/A 1.0 ppb (1) 20.0 ppb (15) 0.23 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
May 16, 2019, 11 p.m. N/A 8.5 ppb (8) 25.9 ppb (24) 18.0 ppb (17) N/A 1.0 ppb (1) 13.0 ppb (10) 0.3 ppb (3) N/A 12.8 μg/m3 (52) 52.0
 
May 16, 2019, 10 p.m. N/A 15.1 ppb (14) 36.9 ppb (34) 22.0 ppb (20) N/A 1.0 ppb (1) 8.0 ppb (6) 0.37 ppb (4) N/A 17.8 μg/m3 (62) 62.0
 
May 16, 2019, 9 p.m. N/A 15.2 ppb (14) 36.7 ppb (34) 22.0 ppb (20) N/A 1.0 ppb (1) 7.0 ppb (5) 0.35 ppb (4) N/A 13.9 μg/m3 (54) 54.0
 
May 16, 2019, 8 p.m. N/A 7.7 ppb (7) 21.2 ppb (20) 21.0 ppb (19) N/A 1.0 ppb (1) 12.0 ppb (9) 0.24 ppb (3) N/A 9.4 μg/m3 (39) 39.0
 
May 16, 2019, 7 p.m. N/A 0.0 ppb (0) -0.4 ppb (0) 19.0 ppb (18) N/A 1.0 ppb (1) 13.0 ppb (10) 0.22 ppb (2) N/A 9.6 μg/m3 (40) 40.0
 
May 16, 2019, 6 p.m. N/A 0.0 ppb (0) -0.4 ppb (0) 16.0 ppb (15) N/A 1.0 ppb (1) 11.0 ppb (8) 0.24 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
May 16, 2019, 5 p.m. N/A 14.5 ppb (13) 25.8 ppb (24) 21.0 ppb (19) N/A 2.0 ppb (3) 5.0 ppb (4) 0.28 ppb (3) N/A 15.8 μg/m3 (58) 58.0
 
May 16, 2019, 4 p.m. N/A 15.9 ppb (15) 33.0 ppb (31) 18.0 ppb (17) N/A 1.0 ppb (1) 7.0 ppb (5) 0.25 ppb (3) N/A 10.6 μg/m3 (44) 44.0
 
May 16, 2019, 3 p.m. N/A 3.0 ppb (3) 11.0 ppb (10) 8.0 ppb (7) N/A 1.0 ppb (1) 13.0 ppb (10) 0.2 ppb (2) N/A 7.9 μg/m3 (33) 33.0
 
May 16, 2019, 2 p.m. N/A 3.5 ppb (3) 12.9 ppb (12) 9.0 ppb (8) N/A 1.0 ppb (1) 11.0 ppb (8) 0.22 ppb (2) N/A 8.3 μg/m3 (35) 35.0
 
May 16, 2019, 1 p.m. N/A 1.0 ppb (1) 8.5 ppb (8) 7.0 ppb (6) N/A N/A 11.0 ppb (8) 0.21 ppb (2) N/A 7.1 μg/m3 (30) 30.0
 
May 16, 2019, noon N/A 10.6 ppb (10) 23.2 ppb (21) 11.0 ppb (10) N/A N/A 9.0 ppb (7) 0.22 ppb (2) N/A 8.3 μg/m3 (35) 35.0
 
May 16, 2019, 11 a.m. N/A 22.6 ppb (21) 39.0 ppb (36) 17.0 ppb (16) N/A 1.0 ppb (1) 5.0 ppb (4) 0.25 ppb (3) N/A 7.9 μg/m3 (33) 36.0
 
May 16, 2019, 10 a.m. N/A 0.1 ppb (0) 11.5 ppb (11) 11.0 ppb (10) N/A 1.0 ppb (1) 11.0 ppb (8) 0.24 ppb (3) N/A 5.3 μg/m3 (22) 22.0
 
May 16, 2019, 9 a.m. N/A 0.1 ppb (0) 8.8 ppb (8) 9.0 ppb (8) N/A 1.0 ppb (1) 16.0 ppb (12) 0.22 ppb (2) N/A 5.6 μg/m3 (23) 23.0
 
May 16, 2019, 8 a.m. N/A 1.2 ppb (1) 21.7 ppb (20) 20.0 ppb (19) N/A 1.0 ppb (1) 11.0 ppb (8) 0.23 ppb (3) N/A 5.7 μg/m3 (24) 24.0
 
May 16, 2019, 7 a.m. N/A 3.3 ppb (3) 33.5 ppb (31) 32.0 ppb (30) N/A 1.0 ppb (1) 3.0 ppb (2) 0.24 ppb (3) N/A 6.2 μg/m3 (26) 31.0
 
May 16, 2019, 6 a.m. N/A 12.9 ppb (12) 45.5 ppb (42) 36.0 ppb (33) N/A 1.0 ppb (1) 2.0 ppb (2) 0.29 ppb (3) N/A 7.2 μg/m3 (30) 42.0
 
May 16, 2019, 5 a.m. N/A 5.7 ppb (5) 38.6 ppb (36) 36.0 ppb (33) N/A 1.0 ppb (1) 2.0 ppb (2) 0.29 ppb (3) N/A 5.9 μg/m3 (25) 36.0
 
May 16, 2019, 4 a.m. N/A 3.7 ppb (3) 36.3 ppb (34) 36.0 ppb (33) N/A 1.0 ppb (1) 4.0 ppb (3) 0.29 ppb (3) N/A 6.7 μg/m3 (28) 34.0
 
May 16, 2019, 3 a.m. N/A 3.6 ppb (3) 36.2 ppb (34) 36.0 ppb (33) N/A 1.0 ppb (1) 6.0 ppb (5) 0.3 ppb (3) N/A 8.1 μg/m3 (34) 34.0
 
May 16, 2019, 2 a.m. N/A 5.3 ppb (5) 34.5 ppb (32) 33.0 ppb (31) N/A 1.0 ppb (1) 10.0 ppb (8) 0.22 ppb (2) N/A 5.3 μg/m3 (22) 32.0
 
May 16, 2019, 1 a.m. N/A 4.2 ppb (4) 24.9 ppb (23) 26.0 ppb (24) N/A 1.0 ppb (1) 17.0 ppb (13) 0.26 ppb (3) N/A 5.2 μg/m3 (22) 24.0
 
May 16, 2019, midnight N/A N/A N/A 23.0 ppb (21) N/A 1.0 ppb (1) 21.0 ppb (16) 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
May 15, 2019, 11 p.m. N/A 4.6 ppb (4) 29.4 ppb (27) 27.0 ppb (25) N/A 1.0 ppb (1) 19.0 ppb (15) 0.22 ppb (2) N/A 4.8 μg/m3 (20) 27.0
 
May 15, 2019, 10 p.m. N/A 2.3 ppb (2) 14.6 ppb (14) 13.0 ppb (12) N/A 1.0 ppb (1) 32.0 ppb (25) 0.18 ppb (2) N/A 5.7 μg/m3 (24) 25.0
 
May 15, 2019, 9 p.m. N/A 3.2 ppb (3) 13.2 ppb (12) 10.0 ppb (9) N/A 1.0 ppb (1) 34.0 ppb (26) 0.17 ppb (2) N/A 1.8 μg/m3 (8) 26.0
 
May 15, 2019, 8 p.m. N/A 5.3 ppb (5) 14.2 ppb (13) 9.0 ppb (8) N/A 1.0 ppb (1) 30.0 ppb (23) 0.17 ppb (2) N/A 3.8 μg/m3 (16) 23.0
 
May 15, 2019, 7 p.m. N/A 5.4 ppb (5) 14.7 ppb (14) 10.0 ppb (9) N/A 1.0 ppb (1) 28.0 ppb (22) 0.18 ppb (2) N/A 5.3 μg/m3 (22) 22.0
 
May 15, 2019, 6 p.m. N/A 2.8 ppb (3) 8.0 ppb (7) 6.0 ppb (6) N/A 1.0 ppb (1) 30.0 ppb (23) 0.16 ppb (2) N/A 2.8 μg/m3 (12) 23.0
 
May 15, 2019, 5 p.m. N/A 1.7 ppb (2) 5.6 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) 32.0 ppb (25) 0.16 ppb (2) N/A 2.5 μg/m3 (10) 25.0
 
May 15, 2019, 4 p.m. N/A 4.4 ppb (4) 12.7 ppb (12) 9.0 ppb (8) N/A 1.0 ppb (1) 27.0 ppb (21) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
May 15, 2019, 3 p.m. N/A 8.2 ppb (8) 20.2 ppb (19) 13.0 ppb (12) N/A 1.0 ppb (1) 20.0 ppb (15) 0.21 ppb (2) N/A 3.3 μg/m3 (14) 19.0
 
May 15, 2019, 2 p.m. N/A 9.6 ppb (9) 27.2 ppb (25) 19.0 ppb (18) N/A 1.0 ppb (1) 15.0 ppb (12) 0.2 ppb (2) N/A 3.7 μg/m3 (15) 25.0
 
May 15, 2019, 1 p.m. N/A 1.2 ppb (1) 11.5 ppb (11) 11.0 ppb (10) N/A 1.0 ppb (1) 26.0 ppb (20) 0.18 ppb (2) N/A 1.8 μg/m3 (8) 20.0
 
May 15, 2019, noon N/A 0.1 ppb (0) 8.9 ppb (8) 9.0 ppb (8) N/A 1.0 ppb (1) 26.0 ppb (20) 0.16 ppb (2) N/A 4.2 μg/m3 (18) 20.0
 
May 15, 2019, 11 a.m. N/A 0.0 ppb (0) 6.2 ppb (6) 6.0 ppb (6) N/A 1.0 ppb (1) 28.0 ppb (22) 0.14 ppb (2) N/A 3.1 μg/m3 (13) 22.0
 
May 15, 2019, 10 a.m. N/A 0.1 ppb (0) 3.3 ppb (3) 4.0 ppb (4) N/A 1.0 ppb (1) 35.0 ppb (27) 0.13 ppb (1) N/A 2.3 μg/m3 (10) 27.0
 
May 15, 2019, 9 a.m. N/A 0.1 ppb (0) 2.3 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) 0.12 ppb (1) N/A 2.0 μg/m3 (8) 28.0
 
May 15, 2019, 8 a.m. N/A 0.1 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) N/A N/A N/A 1.1 μg/m3 (5) 5.0
 
May 15, 2019, 7 a.m. N/A 0.1 ppb (0) 4.8 ppb (4) 5.0 ppb (5) N/A 1.0 ppb (1) 32.0 ppb (25) N/A N/A 3.2 μg/m3 (13) 25.0
 
May 15, 2019, 6 a.m. N/A 0.1 ppb (0) 5.7 ppb (5) 6.0 ppb (6) N/A 1.0 ppb (1) 30.0 ppb (23) 0.13 ppb (1) N/A 1.9 μg/m3 (8) 23.0
 
May 15, 2019, 5 a.m. N/A 0.1 ppb (0) 2.7 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 34.0 ppb (26) 0.13 ppb (1) N/A 1.6 μg/m3 (7) 26.0
 
May 15, 2019, 4 a.m. N/A 0.2 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 33.0 ppb (25) 0.14 ppb (2) N/A 2.2 μg/m3 (9) 25.0
 
May 15, 2019, 3 a.m. N/A 0.1 ppb (0) 4.9 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (1) 28.0 ppb (22) 0.14 ppb (2) N/A 2.3 μg/m3 (10) 22.0
 
May 15, 2019, 2 a.m. N/A 0.6 ppb (1) 5.5 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (1) 27.0 ppb (21) 0.15 ppb (2) N/A 1.2 μg/m3 (5) 21.0
 
May 15, 2019, 1 a.m. N/A N/A N/A 4.0 ppb (4) N/A 1.0 ppb (1) 27.0 ppb (21) 0.15 ppb (2) N/A 0.8 μg/m3 (3) 21.0
 
May 15, 2019, midnight N/A N/A N/A 2.0 ppb (2) N/A 1.0 ppb (1) 28.0 ppb (22) 0.13 ppb (1) N/A 0.0 μg/m3 (0) 22.0
 
May 14, 2019, 11 p.m. N/A 1.1 ppb (1) 4.2 ppb (4) 3.0 ppb (3) N/A 1.0 ppb (1) 27.0 ppb (21) 0.14 ppb (2) N/A 1.8 μg/m3 (8) 21.0
 
May 14, 2019, 10 p.m. N/A 1.1 ppb (1) 4.3 ppb (4) 3.0 ppb (3) N/A 1.0 ppb (1) 28.0 ppb (22) 0.15 ppb (2) N/A 0.5 μg/m3 (2) 22.0
 
May 14, 2019, 9 p.m. N/A 1.4 ppb (1) 5.4 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) 30.0 ppb (23) 0.13 ppb (1) N/A 0.4 μg/m3 (2) 23.0
 
May 14, 2019, 8 p.m. N/A 3.2 ppb (3) 11.2 ppb (10) 8.0 ppb (7) N/A 1.0 ppb (1) 26.0 ppb (20) 0.18 ppb (2) N/A 4.4 μg/m3 (18) 20.0
 
May 14, 2019, 7 p.m. N/A 2.7 ppb (3) 9.9 ppb (9) 7.0 ppb (6) N/A 1.0 ppb (1) 28.0 ppb (22) 0.18 ppb (2) N/A 7.8 μg/m3 (32) 32.0
 
May 14, 2019, 6 p.m. N/A 4.4 ppb (4) 15.0 ppb (14) 11.0 ppb (10) N/A 1.0 ppb (1) 25.0 ppb (19) 0.21 ppb (2) N/A 6.5 μg/m3 (27) 27.0
 
May 14, 2019, 5 p.m. N/A 2.3 ppb (2) 11.4 ppb (11) 10.0 ppb (9) N/A 1.0 ppb (1) 28.0 ppb (22) 0.25 ppb (3) N/A 6.6 μg/m3 (28) 28.0
 
May 14, 2019, 4 p.m. N/A 2.5 ppb (2) 14.4 ppb (13) 13.0 ppb (12) N/A 1.0 ppb (1) 21.0 ppb (16) 0.25 ppb (3) N/A 5.4 μg/m3 (23) 23.0