AQSQID: 530330080

Site Name: Seattle-Beacon Hill

Location: Seattle, WA

Reporting: True, Located: True

Current AQI: 81.0

Seattle WA, US: 47.568236, -122.308628

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 16, 2019, 4 p.m. N/A 55.1 ppb (51) 83.3 ppb (81) 30.0 ppb (28) N/A 2.0 ppb (3) 1.0 ppb (1) 0.58 ppb (6) N/A 9.0 μg/m3 (38) 81.0
 
Jan. 16, 2019, 3 p.m. N/A 69.2 ppb (66) 100.7 ppb (100) 32.0 ppb (30) N/A 2.0 ppb (3) 1.0 ppb (1) 0.53 ppb (6) N/A 8.6 μg/m3 (36) 100.0
 
Jan. 16, 2019, 2 p.m. N/A N/A N/A 28.0 ppb (26) N/A 1.0 ppb (1) 1.0 ppb (1) 0.41 ppb (5) N/A 10.8 μg/m3 (45) 45.0
 
Jan. 16, 2019, 1 p.m. N/A N/A N/A 28.0 ppb (26) N/A 2.0 ppb (3) 1.0 ppb (1) 0.46 ppb (5) N/A 12.6 μg/m3 (51) 51.0
 
Jan. 16, 2019, noon N/A N/A N/A 26.0 ppb (24) N/A 2.0 ppb (3) 1.0 ppb (1) 0.44 ppb (5) N/A 13.8 μg/m3 (54) 54.0
 
Jan. 16, 2019, 11 a.m. N/A N/A N/A 25.0 ppb (23) N/A 2.0 ppb (3) 1.0 ppb (1) 0.43 ppb (5) N/A 14.5 μg/m3 (55) 55.0
 
Jan. 16, 2019, 10 a.m. N/A N/A N/A 26.0 ppb (24) N/A 2.0 ppb (3) 1.0 ppb (1) 0.65 ppb (7) N/A 15.9 μg/m3 (58) 58.0
 
Jan. 16, 2019, 9 a.m. N/A N/A N/A 24.0 ppb (22) N/A 2.0 ppb (3) 1.0 ppb (1) 0.56 ppb (6) N/A 11.8 μg/m3 (49) 49.0
 
Jan. 16, 2019, 8 a.m. N/A N/A N/A 22.0 ppb (20) N/A 1.0 ppb (1) 1.0 ppb (1) 0.34 ppb (4) N/A 11.7 μg/m3 (49) 49.0
 
Jan. 16, 2019, 7 a.m. N/A N/A N/A 22.0 ppb (20) N/A N/A 5.0 ppb (4) 0.33 ppb (4) N/A 7.3 μg/m3 (30) 30.0
 
Jan. 16, 2019, 6 a.m. N/A N/A N/A 30.0 ppb (28) N/A N/A 3.0 ppb (2) 0.36 ppb (4) N/A 7.9 μg/m3 (33) 33.0
 
Jan. 16, 2019, 5 a.m. N/A N/A N/A 32.0 ppb (30) N/A 1.0 ppb (1) 2.0 ppb (2) 0.42 ppb (5) N/A 14.1 μg/m3 (54) 54.0
 
Jan. 16, 2019, 4 a.m. N/A N/A N/A 33.0 ppb (31) N/A 2.0 ppb (3) 2.0 ppb (2) 0.66 ppb (7) N/A 16.9 μg/m3 (60) 60.0
 
Jan. 16, 2019, 3 a.m. N/A N/A N/A 32.0 ppb (30) N/A 2.0 ppb (3) 1.0 ppb (1) 0.61 ppb (7) N/A 17.8 μg/m3 (62) 62.0
 
Jan. 16, 2019, 2 a.m. N/A N/A N/A 31.0 ppb (29) N/A 3.0 ppb (4) 1.0 ppb (1) 0.61 ppb (7) N/A 10.7 μg/m3 (45) 45.0
 
Jan. 16, 2019, 1 a.m. N/A N/A N/A 35.0 ppb (32) N/A 3.0 ppb (4) 1.0 ppb (1) 0.48 ppb (5) N/A 10.7 μg/m3 (45) 45.0
 
Jan. 16, 2019, midnight N/A N/A N/A 36.0 ppb (33) N/A 3.0 ppb (4) 1.0 ppb (1) 0.45 ppb (5) N/A 20.1 μg/m3 (67) 67.0
 
Jan. 15, 2019, 11 p.m. N/A N/A N/A 36.0 ppb (33) N/A 4.0 ppb (6) 1.0 ppb (1) 0.84 ppb (9) N/A 22.7 μg/m3 (73) 73.0
 
Jan. 15, 2019, 10 p.m. N/A N/A N/A 34.0 ppb (31) N/A 4.0 ppb (6) 2.0 ppb (2) 0.88 ppb (10) N/A 30.5 μg/m3 (89) 89.0
 
Jan. 15, 2019, 9 p.m. N/A N/A N/A 42.0 ppb (39) N/A 6.0 ppb (9) 3.0 ppb (2) 0.99 ppb (11) N/A 22.5 μg/m3 (72) 72.0
 
Jan. 15, 2019, 8 p.m. N/A N/A N/A 34.0 ppb (31) N/A 5.0 ppb (7) 6.0 ppb (5) 0.88 ppb (10) N/A 14.7 μg/m3 (56) 56.0
 
Jan. 15, 2019, 7 p.m. N/A N/A N/A 33.0 ppb (31) N/A 4.0 ppb (6) 3.0 ppb (2) 1.05 ppb (12) N/A 19.3 μg/m3 (66) 66.0
 
Jan. 15, 2019, 6 p.m. N/A N/A N/A 28.0 ppb (26) N/A 4.0 ppb (6) 2.0 ppb (2) 1.13 ppb (13) N/A 4.9 μg/m3 (20) 26.0
 
Jan. 15, 2019, 5 p.m. N/A 29.2 ppb (27) 56.2 ppb (52) 28.0 ppb (26) N/A 2.0 ppb (3) 8.0 ppb (6) 0.43 ppb (5) N/A 6.9 μg/m3 (29) 52.0
 
Jan. 15, 2019, 4 p.m. N/A 7.3 ppb (7) 30.6 ppb (28) 24.0 ppb (22) N/A 2.0 ppb (3) 8.0 ppb (6) 0.39 ppb (4) N/A 5.7 μg/m3 (24) 28.0
 
Jan. 15, 2019, 3 p.m. N/A 11.8 ppb (11) 38.0 ppb (35) 27.0 ppb (25) N/A 1.0 ppb (1) 1.0 ppb (1) 0.34 ppb (4) N/A 18.2 μg/m3 (63) 63.0
 
Jan. 15, 2019, 2 p.m. N/A 46.0 ppb (43) 67.6 ppb (64) 22.0 ppb (20) N/A 3.0 ppb (4) 1.0 ppb (1) 0.44 ppb (5) N/A 9.4 μg/m3 (39) 64.0
 
Jan. 15, 2019, 1 p.m. N/A 25.8 ppb (24) 49.3 ppb (46) 24.0 ppb (22) N/A 1.0 ppb (1) 2.0 ppb (2) 0.38 ppb (4) N/A 12.9 μg/m3 (52) 52.0
 
Jan. 15, 2019, noon N/A 40.9 ppb (38) 65.8 ppb (63) 26.0 ppb (24) N/A 2.0 ppb (3) 3.0 ppb (2) 0.46 ppb (5) N/A 15.3 μg/m3 (57) 63.0
 
Jan. 15, 2019, 11 a.m. N/A 45.2 ppb (42) 68.4 ppb (65) 25.0 ppb (23) N/A 2.0 ppb (3) 1.0 ppb (1) 0.52 ppb (6) N/A 9.8 μg/m3 (41) 65.0
 
Jan. 15, 2019, 10 a.m. N/A 18.8 ppb (17) 45.4 ppb (42) 28.0 ppb (26) N/A 1.0 ppb (1) N/A 0.36 ppb (4) N/A 15.2 μg/m3 (57) 57.0
 
Jan. 15, 2019, 9 a.m. N/A 67.2 ppb (64) 90.3 ppb (89) 24.0 ppb (22) N/A 2.0 ppb (3) 1.0 ppb (1) 0.53 ppb (6) N/A 17.1 μg/m3 (61) 89.0
 
Jan. 15, 2019, 8 a.m. N/A 57.9 ppb (54) 81.8 ppb (80) 24.0 ppb (22) N/A 2.0 ppb (3) 1.0 ppb (1) N/A N/A 15.8 μg/m3 (58) 80.0
 
Jan. 15, 2019, 7 a.m. N/A 66.5 ppb (63) 92.8 ppb (91) 27.0 ppb (25) N/A 2.0 ppb (3) 1.0 ppb (1) N/A N/A 13.1 μg/m3 (52) 91.0
 
Jan. 15, 2019, 6 a.m. N/A 47.6 ppb (44) 71.9 ppb (69) 25.0 ppb (23) N/A 2.0 ppb (3) 1.0 ppb (1) 0.47 ppb (5) N/A 15.0 μg/m3 (56) 69.0
 
Jan. 15, 2019, 5 a.m. N/A 69.5 ppb (66) 93.3 ppb (92) 24.0 ppb (22) N/A 2.0 ppb (3) 1.0 ppb (1) 0.47 ppb (5) N/A 15.8 μg/m3 (58) 92.0
 
Jan. 15, 2019, 4 a.m. N/A 65.4 ppb (62) 91.4 ppb (90) 26.0 ppb (24) N/A 2.0 ppb (3) 1.0 ppb (1) 0.47 ppb (5) N/A 13.7 μg/m3 (54) 90.0
 
Jan. 15, 2019, 3 a.m. N/A 46.6 ppb (43) 75.5 ppb (73) 30.0 ppb (28) N/A 2.0 ppb (3) 1.0 ppb (1) 0.33 ppb (4) N/A 11.1 μg/m3 (46) 73.0
 
Jan. 15, 2019, 2 a.m. N/A 59.2 ppb (56) 89.5 ppb (88) 31.0 ppb (29) N/A 2.0 ppb (3) 1.0 ppb (1) 0.36 ppb (4) N/A 10.0 μg/m3 (42) 88.0
 
Jan. 15, 2019, 1 a.m. N/A 58.6 ppb (55) 89.5 ppb (88) 32.0 ppb (30) N/A 2.0 ppb (3) 1.0 ppb (1) 0.36 ppb (4) N/A 10.1 μg/m3 (42) 88.0
 
Jan. 15, 2019, midnight N/A 51.9 ppb (48) 80.6 ppb (78) 31.0 ppb (29) N/A 2.0 ppb (3) 1.0 ppb (1) 0.28 ppb (3) N/A 6.2 μg/m3 (26) 78.0
 
Jan. 14, 2019, 11 p.m. N/A 24.8 ppb (23) 47.8 ppb (44) 25.0 ppb (23) N/A 1.0 ppb (1) 6.0 ppb (5) 0.24 ppb (3) N/A 5.8 μg/m3 (24) 44.0
 
Jan. 14, 2019, 10 p.m. N/A N/A N/A 22.0 ppb (20) N/A 2.0 ppb (3) 8.0 ppb (6) 0.26 ppb (3) N/A 10.4 μg/m3 (43) 43.0
 
Jan. 14, 2019, 9 p.m. N/A N/A N/A 24.0 ppb (22) N/A 2.0 ppb (3) 6.0 ppb (5) 0.26 ppb (3) N/A 9.1 μg/m3 (38) 38.0
 
Jan. 14, 2019, 8 p.m. N/A N/A N/A 23.0 ppb (21) N/A 2.0 ppb (3) 7.0 ppb (5) 0.29 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 14, 2019, 7 p.m. N/A N/A N/A 14.0 ppb (13) N/A 1.0 ppb (1) 13.0 ppb (10) 0.31 ppb (3) N/A 12.5 μg/m3 (51) 51.0
 
Jan. 14, 2019, 6 p.m. N/A N/A N/A 27.0 ppb (25) N/A 2.0 ppb (3) 4.0 ppb (3) 0.44 ppb (5) N/A 6.7 μg/m3 (28) 28.0
 
Jan. 14, 2019, 5 p.m. N/A N/A N/A 18.0 ppb (17) N/A 1.0 ppb (1) 5.0 ppb (4) 0.39 ppb (4) N/A 5.4 μg/m3 (23) 23.0
 
Jan. 14, 2019, 4 p.m. N/A N/A N/A 18.0 ppb (17) N/A 1.0 ppb (1) 5.0 ppb (4) 0.3 ppb (3) N/A 6.5 μg/m3 (27) 27.0
 
Jan. 14, 2019, 3 p.m. N/A N/A N/A 20.0 ppb (19) N/A 1.0 ppb (1) 3.0 ppb (2) 0.27 ppb (3) N/A 7.4 μg/m3 (31) 31.0
 
Jan. 14, 2019, 2 p.m. N/A N/A N/A 15.0 ppb (14) N/A 1.0 ppb (1) 7.0 ppb (5) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 14, 2019, 1 p.m. N/A N/A N/A 16.0 ppb (15) N/A 1.0 ppb (1) 9.0 ppb (7) 0.22 ppb (2) N/A 6.5 μg/m3 (27) 27.0
 
Jan. 14, 2019, noon N/A N/A N/A 13.0 ppb (12) N/A 1.0 ppb (1) 10.0 ppb (8) 0.21 ppb (2) N/A 5.5 μg/m3 (23) 23.0
 
Jan. 14, 2019, 11 a.m. N/A N/A N/A 13.0 ppb (12) N/A 1.0 ppb (1) 8.0 ppb (6) 0.22 ppb (2) N/A 11.3 μg/m3 (47) 47.0
 
Jan. 14, 2019, 10 a.m. N/A N/A N/A 15.0 ppb (14) N/A 1.0 ppb (1) 5.0 ppb (4) 0.27 ppb (3) N/A 12.4 μg/m3 (51) 51.0
 
Jan. 14, 2019, 9 a.m. N/A N/A N/A 18.0 ppb (17) N/A 1.0 ppb (1) 5.0 ppb (4) 0.27 ppb (3) N/A 14.1 μg/m3 (54) 54.0
 
Jan. 14, 2019, 8 a.m. N/A N/A N/A 25.0 ppb (23) N/A 1.0 ppb (1) 1.0 ppb (1) 0.32 ppb (4) N/A 11.1 μg/m3 (46) 46.0
 
Jan. 14, 2019, 7 a.m. N/A N/A N/A 24.0 ppb (22) N/A N/A 2.0 ppb (2) 0.34 ppb (4) N/A 13.5 μg/m3 (53) 53.0
 
Jan. 14, 2019, 6 a.m. N/A N/A N/A 25.0 ppb (23) N/A N/A 3.0 ppb (2) 0.36 ppb (4) N/A 15.0 μg/m3 (56) 56.0
 
Jan. 14, 2019, 5 a.m. N/A N/A N/A 26.0 ppb (24) N/A 1.0 ppb (1) 2.0 ppb (2) 0.39 ppb (4) N/A 13.7 μg/m3 (54) 54.0
 
Jan. 14, 2019, 4 a.m. N/A N/A N/A 30.0 ppb (28) N/A 1.0 ppb (1) 1.0 ppb (1) 0.38 ppb (4) N/A 10.3 μg/m3 (43) 43.0
 
Jan. 14, 2019, 3 a.m. N/A N/A N/A 29.0 ppb (27) N/A 1.0 ppb (1) 4.0 ppb (3) 0.39 ppb (4) N/A 8.9 μg/m3 (37) 37.0
 
Jan. 14, 2019, 2 a.m. N/A N/A N/A 22.0 ppb (20) N/A 1.0 ppb (1) 9.0 ppb (7) 0.34 ppb (4) N/A 6.8 μg/m3 (28) 28.0
 
Jan. 14, 2019, 1 a.m. N/A N/A N/A 27.0 ppb (25) N/A 1.0 ppb (1) 4.0 ppb (3) 0.36 ppb (4) N/A 7.4 μg/m3 (31) 31.0
 
Jan. 14, 2019, midnight N/A N/A N/A 25.0 ppb (23) N/A 1.0 ppb (1) 4.0 ppb (3) 0.29 ppb (3) N/A 10.2 μg/m3 (42) 42.0
 
Jan. 13, 2019, 11 p.m. N/A N/A N/A 25.0 ppb (23) N/A 2.0 ppb (3) 4.0 ppb (3) 0.31 ppb (3) N/A 7.1 μg/m3 (30) 30.0
 
Jan. 13, 2019, 10 p.m. N/A N/A N/A 24.0 ppb (22) N/A 2.0 ppb (3) 6.0 ppb (5) 0.3 ppb (3) N/A 6.6 μg/m3 (28) 28.0
 
Jan. 13, 2019, 9 p.m. N/A N/A N/A 21.0 ppb (19) N/A 1.0 ppb (1) 9.0 ppb (7) 0.28 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Jan. 13, 2019, 8 p.m. N/A N/A N/A 26.0 ppb (24) N/A 2.0 ppb (3) 5.0 ppb (4) 0.4 ppb (4) N/A 18.8 μg/m3 (64) 64.0
 
Jan. 13, 2019, 7 p.m. N/A N/A N/A 34.0 ppb (31) N/A 3.0 ppb (4) 4.0 ppb (3) 0.59 ppb (7) N/A 16.4 μg/m3 (59) 59.0
 
Jan. 13, 2019, 6 p.m. N/A N/A N/A 26.0 ppb (24) N/A 2.0 ppb (3) 5.0 ppb (4) 0.58 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 13, 2019, 5 p.m. N/A 8.4 ppb (8) 21.7 ppb (20) 14.0 ppb (13) N/A 1.0 ppb (1) 10.0 ppb (8) 0.3 ppb (3) N/A 5.5 μg/m3 (23) 23.0
 
Jan. 13, 2019, 4 p.m. N/A 7.5 ppb (7) 25.2 ppb (23) 18.0 ppb (17) N/A 1.0 ppb (1) 4.0 ppb (3) 0.34 ppb (4) N/A 5.8 μg/m3 (24) 24.0
 
Jan. 13, 2019, 3 p.m. N/A 2.2 ppb (2) 21.8 ppb (20) 20.0 ppb (19) N/A 1.0 ppb (1) 4.0 ppb (3) 0.31 ppb (3) N/A 9.1 μg/m3 (38) 38.0
 
Jan. 13, 2019, 2 p.m. N/A 7.9 ppb (7) 27.3 ppb (25) 20.0 ppb (19) N/A 1.0 ppb (1) 1.0 ppb (1) 0.42 ppb (5) N/A 12.8 μg/m3 (52) 52.0
 
Jan. 13, 2019, 1 p.m. N/A 13.8 ppb (13) 33.4 ppb (31) 21.0 ppb (19) N/A 1.0 ppb (1) 1.0 ppb (1) 0.51 ppb (6) N/A 13.4 μg/m3 (53) 53.0
 
Jan. 13, 2019, noon N/A 15.2 ppb (14) 35.7 ppb (33) 21.0 ppb (19) N/A 1.0 ppb (1) 1.0 ppb (1) 0.55 ppb (6) N/A 12.7 μg/m3 (51) 51.0
 
Jan. 13, 2019, 11 a.m. N/A 37.8 ppb (35) 61.7 ppb (58) 25.0 ppb (23) N/A 2.0 ppb (3) 1.0 ppb (1) 0.46 ppb (5) N/A 16.6 μg/m3 (60) 60.0
 
Jan. 13, 2019, 10 a.m. N/A 45.1 ppb (42) 68.4 ppb (65) 25.0 ppb (23) N/A 2.0 ppb (3) N/A 0.6 ppb (7) N/A 17.4 μg/m3 (61) 65.0
 
Jan. 13, 2019, 9 a.m. N/A 60.4 ppb (57) 87.4 ppb (86) 28.0 ppb (26) N/A 2.0 ppb (3) 1.0 ppb (1) 0.55 ppb (6) N/A 15.3 μg/m3 (57) 86.0
 
Jan. 13, 2019, 8 a.m. N/A 44.9 ppb (42) 73.2 ppb (70) 30.0 ppb (28) N/A 2.0 ppb (3) 1.0 ppb (1) N/A N/A 17.4 μg/m3 (61) 70.0
 
Jan. 13, 2019, 7 a.m. N/A 37.8 ppb (35) 62.0 ppb (59) 26.0 ppb (24) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 10.7 μg/m3 (45) 59.0
 
Jan. 13, 2019, 6 a.m. N/A 8.6 ppb (8) 27.6 ppb (26) 19.0 ppb (18) N/A 1.0 ppb (1) 10.0 ppb (8) 0.4 ppb (4) N/A 4.6 μg/m3 (19) 26.0
 
Jan. 13, 2019, 5 a.m. N/A 0.4 ppb (0) 9.1 ppb (8) 9.0 ppb (8) N/A 1.0 ppb (1) 24.0 ppb (18) 0.19 ppb (2) N/A 4.2 μg/m3 (18) 18.0
 
Jan. 13, 2019, 4 a.m. N/A 0.3 ppb (0) 7.4 ppb (7) 7.0 ppb (6) N/A 1.0 ppb (1) 26.0 ppb (20) 0.2 ppb (2) N/A 6.5 μg/m3 (27) 27.0
 
Jan. 13, 2019, 3 a.m. N/A 3.8 ppb (4) 26.4 ppb (24) 22.0 ppb (20) N/A 1.0 ppb (1) 11.0 ppb (8) 0.29 ppb (3) N/A 5.0 μg/m3 (21) 24.0
 
Jan. 13, 2019, 2 a.m. N/A 1.8 ppb (2) 23.0 ppb (21) 22.0 ppb (20) N/A 1.0 ppb (1) 12.0 ppb (9) 0.3 ppb (3) N/A 11.3 μg/m3 (47) 47.0
 
Jan. 13, 2019, 1 a.m. N/A 26.7 ppb (25) 54.9 ppb (51) 29.0 ppb (27) N/A 2.0 ppb (3) 4.0 ppb (3) 0.5 ppb (6) N/A 10.1 μg/m3 (42) 51.0
 
Jan. 13, 2019, midnight N/A 40.0 ppb (37) 67.5 ppb (64) 30.0 ppb (28) N/A 2.0 ppb (3) 2.0 ppb (2) 0.49 ppb (5) N/A 12.2 μg/m3 (50) 64.0
 
Jan. 12, 2019, 11 p.m. N/A 52.0 ppb (48) 77.7 ppb (75) 27.0 ppb (25) N/A N/A 2.0 ppb (2) 0.5 ppb (6) N/A 18.2 μg/m3 (63) 75.0
 
Jan. 12, 2019, 10 p.m. N/A 67.9 ppb (65) 95.7 ppb (94) 29.0 ppb (27) N/A N/A 3.0 ppb (2) 0.53 ppb (6) N/A 19.5 μg/m3 (66) 94.0
 
Jan. 12, 2019, 9 p.m. N/A 60.1 ppb (56) 86.3 ppb (84) 27.0 ppb (25) N/A 3.0 ppb (4) 4.0 ppb (3) 0.59 ppb (7) N/A 18.3 μg/m3 (63) 84.0
 
Jan. 12, 2019, 8 p.m. N/A 94.8 ppb (93) 121.0 ppb (104) 28.0 ppb (26) N/A 4.0 ppb (6) 3.0 ppb (2) 0.61 ppb (7) N/A 18.8 μg/m3 (64) 104.0
 
Jan. 12, 2019, 7 p.m. N/A 126.8 ppb (105) 147.7 ppb (109) 31.0 ppb (29) N/A 4.0 ppb (6) 2.0 ppb (2) 1.02 ppb (11) N/A 16.6 μg/m3 (60) 109.0
 
Jan. 12, 2019, 6 p.m. N/A N/A 68.7 ppb (66) 26.0 ppb (24) N/A 3.0 ppb (4) 2.0 ppb (2) 1.09 ppb (12) N/A 12.8 μg/m3 (52) 66.0
 
Jan. 12, 2019, 5 p.m. N/A 61.9 ppb (58) 79.8 ppb (77) 19.0 ppb (18) N/A 2.0 ppb (3) 2.0 ppb (2) 0.62 ppb (7) N/A 9.2 μg/m3 (38) 77.0
 
Jan. 12, 2019, 4 p.m. N/A 57.5 ppb (54) 81.5 ppb (79) 26.0 ppb (24) N/A 2.0 ppb (3) 1.0 ppb (1) 0.35 ppb (4) N/A 12.1 μg/m3 (50) 79.0
 
Jan. 12, 2019, 3 p.m. N/A 89.9 ppb (88) 115.1 ppb (103) 27.0 ppb (25) N/A 3.0 ppb (4) 1.0 ppb (1) 0.36 ppb (4) N/A 12.0 μg/m3 (50) 103.0
 
Jan. 12, 2019, 2 p.m. N/A 69.8 ppb (67) 94.5 ppb (93) 27.0 ppb (25) N/A 2.0 ppb (3) 1.0 ppb (1) 0.41 ppb (5) N/A 9.6 μg/m3 (40) 93.0
 
Jan. 12, 2019, 1 p.m. N/A 46.9 ppb (43) 74.9 ppb (72) 29.0 ppb (27) N/A 2.0 ppb (3) 1.0 ppb (1) 0.41 ppb (5) N/A 8.2 μg/m3 (34) 72.0
 
Jan. 12, 2019, noon N/A 34.5 ppb (32) 58.9 ppb (55) 27.0 ppb (25) N/A 2.0 ppb (3) 1.0 ppb (1) 0.48 ppb (5) N/A 12.7 μg/m3 (51) 55.0
 
Jan. 12, 2019, 11 a.m. N/A 31.6 ppb (29) 56.6 ppb (53) 26.0 ppb (24) N/A 1.0 ppb (1) 4.0 ppb (3) 0.33 ppb (4) N/A 9.4 μg/m3 (39) 53.0
 
Jan. 12, 2019, 10 a.m. N/A 56.6 ppb (53) 82.5 ppb (80) 28.0 ppb (26) N/A 2.0 ppb (3) 4.0 ppb (3) 0.34 ppb (4) N/A -0.5 μg/m3 (0) 80.0
 
Jan. 12, 2019, 9 a.m. N/A 7.0 ppb (6) 20.4 ppb (19) 13.0 ppb (12) N/A 1.0 ppb (1) 21.0 ppb (16) 0.18 ppb (2) N/A 3.8 μg/m3 (16) 19.0
 
Jan. 12, 2019, 8 a.m. N/A 0.3 ppb (0) 12.3 ppb (11) 12.0 ppb (11) N/A 1.0 ppb (1) 21.0 ppb (16) 0.19 ppb (2) N/A 2.8 μg/m3 (12) 16.0
 
Jan. 12, 2019, 7 a.m. N/A 0.2 ppb (0) 5.1 ppb (5) 5.0 ppb (5) N/A N/A 28.0 ppb (22) 0.15 ppb (2) N/A 4.8 μg/m3 (20) 22.0
 
Jan. 12, 2019, 6 a.m. N/A 0.7 ppb (1) 13.8 ppb (13) 13.0 ppb (12) N/A N/A 19.0 ppb (15) 0.22 ppb (2) N/A 2.8 μg/m3 (12) 15.0
 
Jan. 12, 2019, 5 a.m. N/A 0.8 ppb (1) 11.1 ppb (10) 9.0 ppb (8) N/A 1.0 ppb (1) 22.0 ppb (17) 0.19 ppb (2) N/A 2.7 μg/m3 (11) 17.0
 
Jan. 12, 2019, 4 a.m. N/A 0.5 ppb (0) 12.7 ppb (12) 12.0 ppb (11) N/A 1.0 ppb (1) 20.0 ppb (15) 0.23 ppb (3) N/A 3.6 μg/m3 (15) 15.0
 
Jan. 12, 2019, 3 a.m. N/A 13.8 ppb (13) 38.8 ppb (36) 26.0 ppb (24) N/A 1.0 ppb (1) 5.0 ppb (4) 0.27 ppb (3) N/A 9.2 μg/m3 (38) 38.0
 
Jan. 12, 2019, 2 a.m. N/A 63.1 ppb (60) 92.4 ppb (91) 31.0 ppb (29) N/A 3.0 ppb (4) 1.0 ppb (1) 0.43 ppb (5) N/A 5.3 μg/m3 (22) 91.0
 
Jan. 12, 2019, 1 a.m. N/A 22.5 ppb (21) 50.7 ppb (47) 30.0 ppb (28) N/A 1.0 ppb (1) 1.0 ppb (1) 0.42 ppb (5) N/A 8.7 μg/m3 (36) 47.0
 
Jan. 12, 2019, midnight N/A 38.7 ppb (36) 66.6 ppb (63) 30.0 ppb (28) N/A 2.0 ppb (3) 1.0 ppb (1) 0.51 ppb (6) N/A 5.4 μg/m3 (23) 63.0
 
Jan. 11, 2019, 11 p.m. N/A 41.6 ppb (39) 69.5 ppb (66) 30.0 ppb (28) N/A 2.0 ppb (3) 2.0 ppb (2) 0.33 ppb (4) N/A 7.4 μg/m3 (31) 66.0
 
Jan. 11, 2019, 10 p.m. N/A 59.5 ppb (56) 86.4 ppb (84) 28.0 ppb (26) N/A 3.0 ppb (4) 3.0 ppb (2) 0.32 ppb (4) N/A 10.2 μg/m3 (42) 84.0
 
Jan. 11, 2019, 9 p.m. N/A 85.6 ppb (84) 114.5 ppb (103) 31.0 ppb (29) N/A 3.0 ppb (4) 2.0 ppb (2) 0.49 ppb (5) N/A 12.4 μg/m3 (51) 103.0
 
Jan. 11, 2019, 8 p.m. N/A 82.7 ppb (81) 112.1 ppb (102) 31.0 ppb (29) N/A 3.0 ppb (4) 4.0 ppb (3) 0.59 ppb (7) N/A 14.5 μg/m3 (55) 102.0
 
Jan. 11, 2019, 7 p.m. N/A 86.6 ppb (85) 116.0 ppb (103) 31.0 ppb (29) N/A 3.0 ppb (4) 3.0 ppb (2) 0.5 ppb (6) N/A 12.4 μg/m3 (51) 103.0
 
Jan. 11, 2019, 6 p.m. N/A 123.3 ppb (104) 153.4 ppb (110) 32.0 ppb (30) N/A 4.0 ppb (6) 2.0 ppb (2) 0.52 ppb (6) N/A 6.2 μg/m3 (26) 110.0
 
Jan. 11, 2019, 5 p.m. N/A 74.8 ppb (72) 101.6 ppb (100) 29.0 ppb (27) N/A 2.0 ppb (3) 2.0 ppb (2) 0.4 ppb (4) N/A 9.3 μg/m3 (39) 100.0
 
Jan. 11, 2019, 4 p.m. N/A 105.2 ppb (101) 135.8 ppb (107) 32.0 ppb (30) N/A 3.0 ppb (4) 1.0 ppb (1) 0.58 ppb (6) N/A 6.5 μg/m3 (27) 107.0
 
Jan. 11, 2019, 3 p.m. N/A 55.1 ppb (51) 83.8 ppb (82) 30.0 ppb (28) N/A 2.0 ppb (3) 1.0 ppb (1) 0.45 ppb (5) N/A 8.8 μg/m3 (37) 82.0
 
Jan. 11, 2019, 2 p.m. N/A 79.0 ppb (77) 108.4 ppb (101) 31.0 ppb (29) N/A 3.0 ppb (4) 1.0 ppb (1) 0.44 ppb (5) N/A 1.4 μg/m3 (6) 101.0
 
Jan. 11, 2019, 1 p.m. N/A 4.1 ppb (4) 26.9 ppb (25) 24.0 ppb (22) N/A 1.0 ppb (1) 5.0 ppb (4) 0.22 ppb (2) N/A 2.9 μg/m3 (12) 25.0
 
Jan. 11, 2019, noon N/A 22.7 ppb (21) 50.4 ppb (47) 29.0 ppb (27) N/A 1.0 ppb (1) 2.0 ppb (2) 0.27 ppb (3) N/A 1.4 μg/m3 (6) 47.0
 
Jan. 11, 2019, 11 a.m. N/A 0.7 ppb (1) 12.5 ppb (12) 13.0 ppb (12) N/A 1.0 ppb (1) 17.0 ppb (13) 0.18 ppb (2) N/A 2.9 μg/m3 (12) 13.0
 
Jan. 11, 2019, 10 a.m. N/A 0.1 ppb (0) 5.4 ppb (5) 6.0 ppb (6) N/A 1.0 ppb (1) N/A 0.16 ppb (2) N/A 1.7 μg/m3 (7) 7.0
 
Jan. 11, 2019, 9 a.m. N/A 0.1 ppb (0) 4.1 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 20.0 ppb (15) 0.15 ppb (2) N/A 1.7 μg/m3 (7) 15.0
 
Jan. 11, 2019, 8 a.m. N/A 0.2 ppb (0) 8.1 ppb (8) 8.0 ppb (7) N/A 1.0 ppb (1) 13.0 ppb (10) N/A N/A 1.6 μg/m3 (7) 10.0
 
Jan. 11, 2019, 7 a.m. N/A 0.2 ppb (0) 7.3 ppb (7) 7.0 ppb (6) N/A 1.0 ppb (1) 14.0 ppb (11) N/A N/A 3.8 μg/m3 (16) 16.0
 
Jan. 11, 2019, 6 a.m. N/A 0.5 ppb (0) 10.0 ppb (9) 9.0 ppb (8) N/A 0.0 ppb (0) 12.0 ppb (9) 0.23 ppb (3) N/A 4.4 μg/m3 (18) 18.0
 
Jan. 11, 2019, 5 a.m. N/A 2.2 ppb (2) 14.8 ppb (14) 13.0 ppb (12) N/A 1.0 ppb (1) 10.0 ppb (8) 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 11, 2019, 4 a.m. N/A 8.5 ppb (8) 21.6 ppb (20) 13.0 ppb (12) N/A 1.0 ppb (1) 11.0 ppb (8) 0.36 ppb (4) N/A 4.4 μg/m3 (18) 20.0
 
Jan. 11, 2019, 3 a.m. N/A 6.6 ppb (6) 25.6 ppb (24) 20.0 ppb (19) N/A 1.0 ppb (1) 5.0 ppb (4) 0.37 ppb (4) N/A 4.5 μg/m3 (19) 24.0
 
Jan. 11, 2019, 2 a.m. N/A 2.1 ppb (2) 16.8 ppb (16) 15.0 ppb (14) N/A 1.0 ppb (1) 11.0 ppb (8) 0.31 ppb (3) N/A 3.1 μg/m3 (13) 16.0
 
Jan. 11, 2019, 1 a.m. N/A 2.5 ppb (2) 20.9 ppb (19) 19.0 ppb (18) N/A 1.0 ppb (1) 9.0 ppb (7) 0.33 ppb (4) N/A 2.7 μg/m3 (11) 19.0
 
Jan. 11, 2019, midnight N/A 2.9 ppb (3) 20.7 ppb (19) 19.0 ppb (18) N/A 1.0 ppb (1) 11.0 ppb (8) 0.31 ppb (3) N/A 2.4 μg/m3 (10) 19.0
 
Jan. 10, 2019, 11 p.m. N/A 1.8 ppb (2) 12.3 ppb (11) 11.0 ppb (10) N/A 1.0 ppb (1) 20.0 ppb (15) 0.25 ppb (3) N/A 2.0 μg/m3 (8) 15.0
 
Jan. 10, 2019, 10 p.m. N/A 1.0 ppb (1) 8.0 ppb (7) 8.0 ppb (7) N/A 1.0 ppb (1) 25.0 ppb (19) 0.2 ppb (2) N/A 2.8 μg/m3 (12) 19.0
 
Jan. 10, 2019, 9 p.m. N/A 2.8 ppb (3) 14.8 ppb (14) 13.0 ppb (12) N/A 1.0 ppb (1) 22.0 ppb (17) 0.21 ppb (2) N/A 1.6 μg/m3 (7) 17.0
 
Jan. 10, 2019, 8 p.m. N/A 1.8 ppb (2) 9.6 ppb (9) 9.0 ppb (8) N/A 1.0 ppb (1) 20.0 ppb (15) 0.19 ppb (2) N/A 2.7 μg/m3 (11) 15.0
 
Jan. 10, 2019, 7 p.m. N/A N/A 18.2 ppb (17) N/A N/A 1.0 ppb (1) 16.0 ppb (12) 0.26 ppb (3) N/A 4.3 μg/m3 (18) 18.0
 
Jan. 10, 2019, 6 p.m. N/A N/A 29.6 ppb (27) N/A N/A 1.0 ppb (1) 10.0 ppb (8) 0.29 ppb (3) N/A 3.8 μg/m3 (16) 27.0
 
Jan. 10, 2019, 5 p.m. N/A 4.8 ppb (4) 22.9 ppb (21) 20.0 ppb (19) N/A 1.0 ppb (1) 9.0 ppb (7) 0.29 ppb (3) N/A 2.5 μg/m3 (10) 21.0
 
Jan. 10, 2019, 4 p.m. N/A 4.8 ppb (4) 25.4 ppb (24) 22.0 ppb (20) N/A 1.0 ppb (1) 8.0 ppb (6) 0.29 ppb (3) N/A 3.2 μg/m3 (13) 24.0
 
Jan. 10, 2019, 3 p.m. N/A 1.0 ppb (1) 15.0 ppb (14) 15.0 ppb (14) N/A 1.0 ppb (1) 15.0 ppb (12) 0.24 ppb (3) N/A 2.3 μg/m3 (10) 14.0
 
Jan. 10, 2019, 2 p.m. N/A 0.7 ppb (1) 15.7 ppb (15) 16.0 ppb (15) N/A 1.0 ppb (1) 16.0 ppb (12) 0.2 ppb (2) N/A 1.6 μg/m3 (7) 15.0
 
Jan. 10, 2019, 1 p.m. N/A 0.6 ppb (1) 12.9 ppb (12) 14.0 ppb (13) N/A 1.0 ppb (1) 19.0 ppb (15) 0.18 ppb (2) N/A 1.6 μg/m3 (7) 15.0
 
Jan. 10, 2019, noon N/A 0.9 ppb (1) 9.0 ppb (8) 9.0 ppb (8) N/A 1.0 ppb (1) 22.0 ppb (17) 0.15 ppb (2) N/A 0.3 μg/m3 (1) 17.0
 
Jan. 10, 2019, 11 a.m. N/A 0.3 ppb (0) 3.1 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 24.0 ppb (18) 0.14 ppb (2) N/A 0.1 μg/m3 (0) 18.0
 
Jan. 10, 2019, 10 a.m. N/A 0.1 ppb (0) 2.6 ppb (2) 3.0 ppb (3) N/A 1.0 ppb (1) 23.0 ppb (18) 0.15 ppb (2) N/A 1.8 μg/m3 (8) 18.0
 
Jan. 10, 2019, 9 a.m. N/A 0.3 ppb (0) 7.2 ppb (7) 7.0 ppb (6) N/A 1.0 ppb (1) 23.0 ppb (18) 0.16 ppb (2) N/A 0.4 μg/m3 (2) 18.0
 
Jan. 10, 2019, 8 a.m. N/A 0.4 ppb (0) 10.0 ppb (9) 11.0 ppb (10) N/A 1.0 ppb (1) 23.0 ppb (18) 0.17 ppb (2) N/A 2.8 μg/m3 (12) 18.0
 
Jan. 10, 2019, 7 a.m. N/A 0.7 ppb (1) 11.0 ppb (10) 11.0 ppb (10) N/A N/A 23.0 ppb (18) 0.18 ppb (2) N/A 1.6 μg/m3 (7) 18.0
 
Jan. 10, 2019, 6 a.m. N/A 0.3 ppb (0) 8.7 ppb (8) 9.0 ppb (8) N/A N/A 26.0 ppb (20) 0.18 ppb (2) N/A 2.7 μg/m3 (11) 20.0
 
Jan. 10, 2019, 5 a.m. N/A 0.5 ppb (0) 7.4 ppb (7) 8.0 ppb (7) N/A 1.0 ppb (1) 27.0 ppb (21) 0.18 ppb (2) N/A 1.3 μg/m3 (5) 21.0
 
Jan. 10, 2019, 4 a.m. N/A 0.7 ppb (1) 13.0 ppb (12) 13.0 ppb (12) N/A 1.0 ppb (1) 21.0 ppb (16) 0.21 ppb (2) N/A 1.9 μg/m3 (8) 16.0
 
Jan. 10, 2019, 3 a.m. N/A 1.2 ppb (1) 13.7 ppb (13) 14.0 ppb (13) N/A 1.0 ppb (1) 20.0 ppb (15) 0.21 ppb (2) N/A 2.5 μg/m3 (10) 15.0
 
Jan. 10, 2019, 2 a.m. N/A 0.7 ppb (1) 10.4 ppb (10) 10.0 ppb (9) N/A 1.0 ppb (1) 23.0 ppb (18) 0.22 ppb (2) N/A 3.2 μg/m3 (13) 18.0
 
Jan. 10, 2019, 1 a.m. N/A 0.7 ppb (1) 17.0 ppb (16) 17.0 ppb (16) N/A 1.0 ppb (1) 15.0 ppb (12) 0.27 ppb (3) N/A 2.9 μg/m3 (12) 16.0
 
Jan. 10, 2019, midnight N/A 1.2 ppb (1) 10.4 ppb (10) 10.0 ppb (9) N/A 1.0 ppb (1) 18.0 ppb (14) 0.25 ppb (3) N/A 1.8 μg/m3 (8) 14.0
 
Jan. 9, 2019, 11 p.m. N/A 0.4 ppb (0) 4.9 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (1) 25.0 ppb (19) 0.17 ppb (2) N/A 2.2 μg/m3 (9) 19.0
 
Jan. 9, 2019, 10 p.m. N/A 0.5 ppb (0) 5.5 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (1) 25.0 ppb (19) 0.17 ppb (2) N/A 1.3 μg/m3 (5) 19.0
 
Jan. 9, 2019, 9 p.m. N/A 1.4 ppb (1) 9.6 ppb (9) 9.0 ppb (8) N/A 1.0 ppb (1) 22.0 ppb (17) 0.19 ppb (2) N/A 1.7 μg/m3 (7) 17.0
 
Jan. 9, 2019, 8 p.m. N/A 3.5 ppb (3) 15.7 ppb (15) 13.0 ppb (12) N/A 1.0 ppb (1) 18.0 ppb (14) 0.22 ppb (2) N/A 1.9 μg/m3 (8) 15.0
 
Jan. 9, 2019, 7 p.m. N/A 2.1 ppb (2) 11.1 ppb (10) 9.0 ppb (8) N/A 1.0 ppb (1) 20.0 ppb (15) 0.21 ppb (2) N/A 2.4 μg/m3 (10) 15.0
 
Jan. 9, 2019, 6 p.m. N/A 2.7 ppb (3) 12.7 ppb (12) 10.0 ppb (9) N/A 1.0 ppb (1) 20.0 ppb (15) 0.2 ppb (2) N/A 1.5 μg/m3 (6) 15.0
 
Jan. 9, 2019, 5 p.m. N/A 0.7 ppb (1) 7.7 ppb (7) 8.0 ppb (7) N/A 1.0 ppb (1) 23.0 ppb (18) 0.18 ppb (2) N/A 0.1 μg/m3 (0) 18.0