AQSQID: 530330030

Site Name: Seattle-10th & Weller

Location: Seattle, WA

Reporting: True, Located: True

Current AQI: 29.0

Seattle WA, US: 47.597222, -122.319722

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 18, 2019, 2 p.m. 38.4 ppb (36) 9.3 ppb (9) N/A 29.0 ppb (27) N/A N/A N/A 0.39 ppb (4) N/A 7.0 μg/m3 (29) 36.0
 
March 18, 2019, 1 p.m. 20.8 ppb (19) 2.5 ppb (2) N/A 18.0 ppb (17) N/A N/A N/A 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
March 18, 2019, noon 23.4 ppb (22) 7.3 ppb (7) N/A 16.0 ppb (15) N/A N/A N/A 0.33 ppb (4) N/A 5.0 μg/m3 (21) 22.0
 
March 18, 2019, 11 a.m. 12.4 ppb (11) 1.3 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A 0.34 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
March 18, 2019, 10 a.m. 10.4 ppb (10) 0.5 ppb (0) N/A 10.0 ppb (9) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 18, 2019, 8 a.m. 17.0 ppb (16) 1.1 ppb (1) N/A 16.0 ppb (15) N/A N/A N/A 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 7 a.m. 20.7 ppb (19) 3.3 ppb (3) N/A 17.0 ppb (16) N/A N/A N/A 0.39 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 6 a.m. 22.3 ppb (21) 3.8 ppb (4) N/A 19.0 ppb (18) N/A N/A N/A 0.44 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 5 a.m. 28.6 ppb (26) 6.8 ppb (6) N/A 22.0 ppb (20) N/A N/A N/A 0.52 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
March 18, 2019, 4 a.m. 21.4 ppb (20) 3.1 ppb (3) N/A 18.0 ppb (17) N/A N/A N/A 0.43 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
March 18, 2019, 3 a.m. 19.5 ppb (18) 2.0 ppb (2) N/A 18.0 ppb (17) N/A N/A N/A 0.4 ppb (4) N/A 15.0 μg/m3 (56) 56.0
 
March 18, 2019, 2 a.m. 38.6 ppb (36) 13.8 ppb (13) N/A 25.0 ppb (23) N/A N/A N/A 0.69 ppb (8) N/A 11.0 μg/m3 (46) 46.0
 
March 18, 2019, 1 a.m. 26.7 ppb (25) 8.6 ppb (8) N/A 18.0 ppb (17) N/A N/A N/A 0.64 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
March 18, 2019, midnight 28.9 ppb (27) 12.8 ppb (12) N/A 16.0 ppb (15) N/A N/A N/A 0.61 ppb (7) N/A 6.0 μg/m3 (25) 27.0
 
March 17, 2019, 11 p.m. 22.0 ppb (20) 9.7 ppb (9) N/A 12.0 ppb (11) N/A N/A N/A 0.53 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
March 17, 2019, 10 p.m. 28.0 ppb (26) 14.2 ppb (13) N/A 14.0 ppb (13) N/A N/A N/A 0.56 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 9 p.m. 25.4 ppb (24) 12.8 ppb (12) N/A 13.0 ppb (12) N/A N/A N/A 0.52 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 8 p.m. 19.0 ppb (18) 9.4 ppb (9) N/A 10.0 ppb (9) N/A N/A N/A 0.38 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 7 p.m. 23.1 ppb (21) 11.8 ppb (11) N/A 11.0 ppb (10) N/A N/A N/A 0.43 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
March 17, 2019, 6 p.m. 27.8 ppb (26) 14.5 ppb (13) N/A 13.0 ppb (12) N/A N/A N/A 0.52 ppb (6) N/A 6.0 μg/m3 (25) 26.0
 
March 17, 2019, 5 p.m. 13.4 ppb (12) 5.2 ppb (5) N/A 8.0 ppb (7) N/A N/A N/A 0.32 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
March 17, 2019, 4 p.m. 13.3 ppb (12) 4.8 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.27 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 3 p.m. 15.2 ppb (14) 3.6 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.29 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 2 p.m. 20.2 ppb (19) 3.4 ppb (3) N/A 17.0 ppb (16) N/A N/A N/A 0.37 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 1 p.m. 17.2 ppb (16) 2.1 ppb (2) N/A 15.0 ppb (14) N/A N/A N/A 0.27 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, noon 15.4 ppb (14) 3.2 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.26 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
March 17, 2019, 11 a.m. 15.7 ppb (15) 1.3 ppb (1) N/A 14.0 ppb (13) N/A N/A N/A 0.3 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 10 a.m. 16.1 ppb (15) 1.4 ppb (1) N/A 15.0 ppb (14) N/A N/A N/A 0.34 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
March 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 17, 2019, 8 a.m. 20.0 ppb (19) 2.4 ppb (2) N/A 18.0 ppb (17) N/A N/A N/A 0.44 ppb (5) N/A 15.0 μg/m3 (56) 56.0
 
March 17, 2019, 7 a.m. 23.6 ppb (22) 4.2 ppb (4) N/A 19.0 ppb (18) N/A N/A N/A 0.5 ppb (6) N/A 17.0 μg/m3 (61) 61.0
 
March 17, 2019, 6 a.m. 26.8 ppb (25) 4.9 ppb (5) N/A 22.0 ppb (20) N/A N/A N/A 0.57 ppb (6) N/A 15.0 μg/m3 (56) 56.0
 
March 17, 2019, 5 a.m. 36.9 ppb (34) 11.7 ppb (11) N/A 25.0 ppb (23) N/A N/A N/A 0.69 ppb (8) N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 4 a.m. 60.9 ppb (57) 28.0 ppb (26) N/A 33.0 ppb (31) N/A N/A N/A 0.83 ppb (9) N/A 17.0 μg/m3 (61) 61.0
 
March 17, 2019, 3 a.m. 38.4 ppb (36) 12.2 ppb (11) N/A 26.0 ppb (24) N/A N/A N/A 0.61 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
March 17, 2019, 2 a.m. 24.3 ppb (23) 3.0 ppb (3) N/A 21.0 ppb (19) N/A N/A N/A 0.41 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
March 17, 2019, 1 a.m. 21.1 ppb (20) 3.9 ppb (4) N/A 17.0 ppb (16) N/A N/A N/A 0.36 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 17, 2019, midnight 44.1 ppb (41) 18.2 ppb (17) N/A 26.0 ppb (24) N/A N/A N/A 0.69 ppb (8) N/A 8.0 μg/m3 (33) 41.0
 
March 16, 2019, 11 p.m. 47.3 ppb (44) 22.1 ppb (20) N/A 25.0 ppb (23) N/A N/A N/A 0.6 ppb (7) N/A 30.0 μg/m3 (88) 88.0
 
March 16, 2019, 10 p.m. 46.3 ppb (43) 26.2 ppb (24) N/A 20.0 ppb (19) N/A N/A N/A 0.61 ppb (7) N/A 8.0 μg/m3 (33) 43.0
 
March 16, 2019, 9 p.m. 39.6 ppb (37) 21.4 ppb (20) N/A 18.0 ppb (17) N/A N/A N/A 0.61 ppb (7) N/A 7.0 μg/m3 (29) 37.0
 
March 16, 2019, 8 p.m. 63.0 ppb (60) 38.7 ppb (36) N/A 24.0 ppb (22) N/A N/A N/A 0.63 ppb (7) N/A 13.0 μg/m3 (52) 60.0
 
March 16, 2019, 7 p.m. 69.0 ppb (66) 44.4 ppb (41) N/A 25.0 ppb (23) N/A N/A N/A 0.59 ppb (7) N/A 14.0 μg/m3 (54) 66.0
 
March 16, 2019, 6 p.m. 67.2 ppb (64) 43.6 ppb (40) N/A 23.0 ppb (21) N/A N/A N/A 0.72 ppb (8) N/A 14.0 μg/m3 (54) 64.0
 
March 16, 2019, 5 p.m. 84.8 ppb (83) 55.4 ppb (51) N/A 29.0 ppb (27) N/A N/A N/A 0.76 ppb (8) N/A 11.0 μg/m3 (46) 83.0
 
March 16, 2019, 4 p.m. 65.2 ppb (62) 41.1 ppb (38) N/A 24.0 ppb (22) N/A N/A N/A 0.64 ppb (7) N/A 11.0 μg/m3 (46) 62.0
 
March 16, 2019, 3 p.m. 21.7 ppb (20) 5.9 ppb (5) N/A 16.0 ppb (15) N/A N/A N/A 0.39 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
March 16, 2019, 2 p.m. 19.0 ppb (18) 2.4 ppb (2) N/A 17.0 ppb (16) N/A N/A N/A 0.35 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 16, 2019, 1 p.m. 21.0 ppb (19) 3.0 ppb (3) N/A 18.0 ppb (17) N/A N/A N/A 0.31 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
March 16, 2019, noon 22.1 ppb (20) 2.6 ppb (2) N/A 19.0 ppb (18) N/A N/A N/A 0.36 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
March 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
March 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
March 16, 2019, 9 a.m. 16.9 ppb (16) 2.4 ppb (2) N/A 14.0 ppb (13) N/A N/A N/A 0.39 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
March 16, 2019, 8 a.m. 16.3 ppb (15) 1.6 ppb (1) N/A 15.0 ppb (14) N/A N/A N/A 0.37 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
March 16, 2019, 7 a.m. 28.8 ppb (27) 8.1 ppb (8) N/A 21.0 ppb (19) N/A N/A N/A 0.54 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
March 16, 2019, 6 a.m. 23.6 ppb (22) 3.0 ppb (3) N/A 21.0 ppb (19) N/A N/A N/A 0.46 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
March 16, 2019, 5 a.m. 28.1 ppb (26) 8.4 ppb (8) N/A 20.0 ppb (19) N/A N/A N/A 0.53 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
March 16, 2019, 4 a.m. 21.4 ppb (20) 3.1 ppb (3) N/A 18.0 ppb (17) N/A N/A N/A 0.49 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
March 16, 2019, 3 a.m. 20.1 ppb (19) 2.7 ppb (3) N/A 17.0 ppb (16) N/A N/A N/A 0.42 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 16, 2019, 2 a.m. 13.7 ppb (13) 1.7 ppb (2) N/A 12.0 ppb (11) N/A N/A N/A 0.34 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
March 16, 2019, 1 a.m. 22.8 ppb (21) 7.3 ppb (7) N/A 15.0 ppb (14) N/A N/A N/A 0.46 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
March 16, 2019, midnight 32.4 ppb (30) 13.1 ppb (12) N/A 19.0 ppb (18) N/A N/A N/A 0.53 ppb (6) N/A 5.0 μg/m3 (21) 30.0
 
March 15, 2019, 11 p.m. 48.1 ppb (45) 22.5 ppb (21) N/A 26.0 ppb (24) N/A N/A N/A 0.56 ppb (6) N/A 7.0 μg/m3 (29) 45.0
 
March 15, 2019, 10 p.m. 58.2 ppb (54) 30.1 ppb (28) N/A 28.0 ppb (26) N/A N/A N/A 0.71 ppb (8) N/A 9.0 μg/m3 (38) 54.0
 
March 15, 2019, 9 p.m. 93.7 ppb (92) 56.6 ppb (53) N/A 37.0 ppb (34) N/A N/A N/A 0.67 ppb (7) N/A 9.0 μg/m3 (38) 92.0
 
March 15, 2019, 8 p.m. 84.2 ppb (82) 54.3 ppb (50) N/A 29.0 ppb (27) N/A N/A N/A 0.66 ppb (7) N/A 8.0 μg/m3 (33) 82.0
 
March 15, 2019, 7 p.m. 80.4 ppb (78) 56.0 ppb (52) N/A 24.0 ppb (22) N/A N/A N/A 0.66 ppb (7) N/A 18.0 μg/m3 (63) 78.0
 
March 15, 2019, 6 p.m. 138.4 ppb (107) 104.1 ppb (101) N/A 34.0 ppb (31) N/A N/A N/A 0.72 ppb (8) N/A 17.0 μg/m3 (61) 107.0
 
March 15, 2019, 5 p.m. 120.6 ppb (104) 90.0 ppb (88) N/A 31.0 ppb (29) N/A N/A N/A 0.65 ppb (7) N/A 14.0 μg/m3 (54) 104.0
 
March 15, 2019, 4 p.m. 65.0 ppb (62) 43.0 ppb (40) N/A 22.0 ppb (20) N/A N/A N/A 0.59 ppb (7) N/A 13.0 μg/m3 (52) 62.0
 
March 15, 2019, 3 p.m. 138.3 ppb (107) 102.3 ppb (100) N/A 36.0 ppb (33) N/A N/A N/A 0.85 ppb (9) N/A 13.0 μg/m3 (52) 107.0
 
March 15, 2019, 2 p.m. 68.1 ppb (65) 41.8 ppb (39) N/A 26.0 ppb (24) N/A N/A N/A 0.66 ppb (7) N/A 10.0 μg/m3 (42) 65.0
 
March 15, 2019, 1 p.m. 47.2 ppb (44) 20.4 ppb (19) N/A 27.0 ppb (25) N/A N/A N/A 0.52 ppb (6) N/A 7.0 μg/m3 (29) 44.0
 
March 15, 2019, noon 41.7 ppb (39) 17.6 ppb (16) N/A 24.0 ppb (22) N/A N/A N/A 0.44 ppb (5) N/A 9.0 μg/m3 (38) 39.0
 
March 15, 2019, 11 a.m. 25.3 ppb (23) 6.6 ppb (6) N/A 19.0 ppb (18) N/A N/A N/A 0.4 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
March 15, 2019, 10 a.m. 20.6 ppb (19) 3.5 ppb (3) N/A 17.0 ppb (16) N/A N/A N/A 0.32 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
March 15, 2019, 9 a.m. 30.3 ppb (28) 5.1 ppb (5) N/A 25.0 ppb (23) N/A N/A N/A 0.39 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 15, 2019, 8 a.m. 33.1 ppb (31) 4.2 ppb (4) N/A 29.0 ppb (27) N/A N/A N/A 0.35 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
March 15, 2019, 7 a.m. 40.9 ppb (38) 12.0 ppb (11) N/A 29.0 ppb (27) N/A N/A N/A 0.54 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
March 15, 2019, 6 a.m. 43.1 ppb (40) 16.3 ppb (15) N/A 27.0 ppb (25) N/A N/A N/A 0.44 ppb (5) N/A 6.0 μg/m3 (25) 40.0
 
March 15, 2019, 5 a.m. 41.9 ppb (39) 17.0 ppb (16) N/A 25.0 ppb (23) N/A N/A N/A 0.54 ppb (6) N/A 9.0 μg/m3 (38) 39.0
 
March 15, 2019, 4 a.m. 50.9 ppb (47) 23.7 ppb (22) N/A 27.0 ppb (25) N/A N/A N/A 0.61 ppb (7) N/A 9.0 μg/m3 (38) 47.0
 
March 15, 2019, 3 a.m. 58.0 ppb (54) 26.7 ppb (25) N/A 31.0 ppb (29) N/A N/A N/A 0.69 ppb (8) N/A 6.0 μg/m3 (25) 54.0
 
March 15, 2019, 2 a.m. 55.8 ppb (52) 28.6 ppb (26) N/A 27.0 ppb (25) N/A N/A N/A 0.64 ppb (7) N/A 8.0 μg/m3 (33) 52.0
 
March 15, 2019, 1 a.m. 40.4 ppb (37) 19.5 ppb (18) N/A 21.0 ppb (19) N/A N/A N/A 0.62 ppb (7) N/A 8.0 μg/m3 (33) 37.0
 
March 15, 2019, midnight 43.3 ppb (40) 23.1 ppb (21) N/A 20.0 ppb (19) N/A N/A N/A 0.58 ppb (6) N/A 6.0 μg/m3 (25) 40.0
 
March 14, 2019, 11 p.m. 44.2 ppb (41) 24.5 ppb (23) N/A 20.0 ppb (19) N/A N/A N/A 0.58 ppb (6) N/A 5.0 μg/m3 (21) 41.0
 
March 14, 2019, 10 p.m. 41.0 ppb (38) 22.5 ppb (21) N/A 19.0 ppb (18) N/A N/A N/A 0.58 ppb (6) N/A 5.0 μg/m3 (21) 38.0
 
March 14, 2019, 9 p.m. 45.1 ppb (42) 26.2 ppb (24) N/A 19.0 ppb (18) N/A N/A N/A 0.7 ppb (8) N/A 5.0 μg/m3 (21) 42.0
 
March 14, 2019, 8 p.m. 71.3 ppb (68) 45.2 ppb (42) N/A 26.0 ppb (24) N/A N/A N/A 0.72 ppb (8) N/A 7.0 μg/m3 (29) 68.0
 
March 14, 2019, 7 p.m. 90.0 ppb (88) 62.3 ppb (59) N/A 28.0 ppb (26) N/A N/A N/A 0.73 ppb (8) N/A 9.0 μg/m3 (38) 88.0
 
March 14, 2019, 6 p.m. 73.4 ppb (71) 49.9 ppb (46) N/A 23.0 ppb (21) N/A N/A N/A 0.62 ppb (7) N/A 7.0 μg/m3 (29) 71.0
 
March 14, 2019, 5 p.m. 38.9 ppb (36) 19.7 ppb (18) N/A 19.0 ppb (18) N/A N/A N/A 0.47 ppb (5) N/A 7.0 μg/m3 (29) 36.0
 
March 14, 2019, 4 p.m. 57.7 ppb (54) 32.6 ppb (30) N/A 25.0 ppb (23) N/A N/A N/A 0.62 ppb (7) N/A 8.0 μg/m3 (33) 54.0
 
March 14, 2019, 3 p.m. 56.9 ppb (53) 31.3 ppb (29) N/A 26.0 ppb (24) N/A N/A N/A 0.61 ppb (7) N/A 11.0 μg/m3 (46) 53.0
 
March 14, 2019, 2 p.m. 54.1 ppb (50) 27.1 ppb (25) N/A 27.0 ppb (25) N/A N/A N/A 0.52 ppb (6) N/A 9.0 μg/m3 (38) 50.0
 
March 14, 2019, 1 p.m. 41.6 ppb (39) 16.5 ppb (15) N/A 25.0 ppb (23) N/A N/A N/A 0.45 ppb (5) N/A 9.0 μg/m3 (38) 39.0
 
March 14, 2019, noon 33.7 ppb (31) 11.2 ppb (10) N/A 22.0 ppb (20) N/A N/A N/A 0.44 ppb (5) N/A 3.0 μg/m3 (12) 31.0
 
March 14, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
March 14, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
March 14, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 14, 2019, 8 a.m. 8.9 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A N/A 0.22 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 14, 2019, 7 a.m. 15.7 ppb (15) 2.1 ppb (2) N/A 14.0 ppb (13) N/A N/A N/A 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 14, 2019, 6 a.m. 27.9 ppb (26) 5.8 ppb (5) N/A 22.0 ppb (20) N/A N/A N/A 0.45 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 14, 2019, 5 a.m. 38.4 ppb (36) 11.3 ppb (10) N/A 27.0 ppb (25) N/A N/A N/A 0.56 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
March 14, 2019, 4 a.m. 42.7 ppb (40) 11.7 ppb (11) N/A 31.0 ppb (29) N/A N/A N/A 0.61 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
March 14, 2019, 3 a.m. 33.0 ppb (31) 5.9 ppb (5) N/A 27.0 ppb (25) N/A N/A N/A 0.52 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
March 14, 2019, 2 a.m. 95.1 ppb (94) 51.3 ppb (48) N/A 44.0 ppb (41) N/A N/A N/A 0.74 ppb (8) N/A 11.0 μg/m3 (46) 94.0
 
March 14, 2019, 1 a.m. 81.0 ppb (79) 46.4 ppb (43) N/A 35.0 ppb (32) N/A N/A N/A 0.75 ppb (8) N/A 6.0 μg/m3 (25) 79.0
 
March 14, 2019, midnight 62.9 ppb (59) 34.9 ppb (32) N/A 28.0 ppb (26) N/A N/A N/A 0.66 ppb (7) N/A 6.0 μg/m3 (25) 59.0
 
March 13, 2019, 11 p.m. 55.7 ppb (52) 30.3 ppb (28) N/A 25.0 ppb (23) N/A N/A N/A 0.61 ppb (7) N/A 8.0 μg/m3 (33) 52.0
 
March 13, 2019, 10 p.m. 68.4 ppb (65) 41.2 ppb (38) N/A 27.0 ppb (25) N/A N/A N/A 0.73 ppb (8) N/A 11.0 μg/m3 (46) 65.0
 
March 13, 2019, 9 p.m. 78.7 ppb (76) 50.4 ppb (47) N/A 28.0 ppb (26) N/A N/A N/A 0.82 ppb (9) N/A 11.0 μg/m3 (46) 76.0
 
March 13, 2019, 8 p.m. 82.2 ppb (80) 54.2 ppb (50) N/A 28.0 ppb (26) N/A N/A N/A 0.75 ppb (8) N/A 12.0 μg/m3 (50) 80.0
 
March 13, 2019, 7 p.m. 99.9 ppb (99) 66.1 ppb (63) N/A 34.0 ppb (31) N/A N/A N/A 0.72 ppb (8) N/A 14.0 μg/m3 (54) 99.0
 
March 13, 2019, 6 p.m. 83.2 ppb (81) 54.0 ppb (50) N/A 29.0 ppb (27) N/A N/A N/A 0.64 ppb (7) N/A 14.0 μg/m3 (54) 81.0
 
March 13, 2019, 5 p.m. 90.2 ppb (89) 58.8 ppb (55) N/A 32.0 ppb (30) N/A N/A N/A 0.59 ppb (7) N/A 13.0 μg/m3 (52) 89.0
 
March 13, 2019, 4 p.m. 100.9 ppb (100) 65.6 ppb (62) N/A 35.0 ppb (32) N/A N/A N/A 0.6 ppb (7) N/A 14.0 μg/m3 (54) 100.0
 
March 13, 2019, 3 p.m. 32.0 ppb (30) 11.5 ppb (11) N/A 21.0 ppb (19) N/A N/A N/A 0.4 ppb (4) N/A 7.0 μg/m3 (29) 30.0
 
March 13, 2019, 2 p.m. 40.4 ppb (37) 14.9 ppb (14) N/A 25.0 ppb (23) N/A N/A N/A 0.42 ppb (5) N/A 6.0 μg/m3 (25) 37.0
 
March 13, 2019, 1 p.m. 37.9 ppb (35) 13.4 ppb (12) N/A 24.0 ppb (22) N/A N/A N/A 0.4 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 13, 2019, noon 66.0 ppb (63) 39.5 ppb (37) N/A 27.0 ppb (25) N/A N/A N/A 0.57 ppb (6) N/A 8.0 μg/m3 (33) 63.0
 
March 13, 2019, 11 a.m. 38.1 ppb (35) 18.6 ppb (17) N/A 19.0 ppb (18) N/A N/A N/A 0.44 ppb (5) N/A 6.0 μg/m3 (25) 35.0
 
March 13, 2019, 10 a.m. 19.7 ppb (18) 4.4 ppb (4) N/A 15.0 ppb (14) N/A N/A N/A 0.31 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
March 13, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
March 13, 2019, 8 a.m. 8.5 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A N/A N/A 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 13, 2019, 7 a.m. 14.1 ppb (13) 2.3 ppb (2) N/A 12.0 ppb (11) N/A N/A N/A 0.24 ppb (3) N/A 3.0 μg/m3 (12) 13.0
 
March 13, 2019, 6 a.m. 9.8 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A N/A N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 13, 2019, 5 a.m. 14.7 ppb (14) 3.1 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.23 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
March 13, 2019, 4 a.m. 15.3 ppb (14) 1.6 ppb (1) N/A 14.0 ppb (13) N/A N/A N/A 0.31 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 13, 2019, 3 a.m. 30.1 ppb (28) 5.4 ppb (5) N/A 25.0 ppb (23) N/A N/A N/A 0.52 ppb (6) N/A 4.0 μg/m3 (17) 28.0
 
March 13, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
March 13, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
March 13, 2019, midnight N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
March 12, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
March 12, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 12, 2019, 9 p.m. 30.2 ppb (28) 15.3 ppb (14) N/A 15.0 ppb (14) N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 28.0
 
March 12, 2019, 8 p.m. 47.0 ppb (44) 24.1 ppb (22) N/A 23.0 ppb (21) N/A N/A N/A 0.42 ppb (5) N/A 6.0 μg/m3 (25) 44.0
 
March 12, 2019, 7 p.m. 85.1 ppb (83) 57.0 ppb (53) N/A 28.0 ppb (26) N/A N/A N/A 0.6 ppb (7) N/A 9.0 μg/m3 (38) 83.0
 
March 12, 2019, 6 p.m. 78.7 ppb (76) 48.3 ppb (45) N/A 30.0 ppb (28) N/A N/A N/A 0.49 ppb (5) N/A 11.0 μg/m3 (46) 76.0
 
March 12, 2019, 5 p.m. 74.5 ppb (72) 43.4 ppb (40) N/A 31.0 ppb (29) N/A N/A N/A 0.43 ppb (5) N/A 8.0 μg/m3 (33) 72.0
 
March 12, 2019, 4 p.m. 92.0 ppb (90) 51.6 ppb (48) N/A 40.0 ppb (37) N/A N/A N/A 0.46 ppb (5) N/A 11.0 μg/m3 (46) 90.0
 
March 12, 2019, 3 p.m. 64.4 ppb (61) 31.5 ppb (29) N/A 33.0 ppb (31) N/A N/A N/A 0.48 ppb (5) N/A 11.0 μg/m3 (46) 61.0
 
March 12, 2019, 2 p.m. 26.3 ppb (24) 2.9 ppb (3) N/A 23.0 ppb (21) N/A N/A N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 12, 2019, 1 p.m. 29.2 ppb (27) 5.6 ppb (5) N/A 24.0 ppb (22) N/A N/A N/A 0.31 ppb (3) N/A 6.0 μg/m3 (25) 27.0
 
March 12, 2019, noon 40.0 ppb (37) 16.1 ppb (15) N/A 24.0 ppb (22) N/A N/A N/A 0.39 ppb (4) N/A 7.0 μg/m3 (29) 37.0
 
March 12, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
March 12, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
March 12, 2019, 9 a.m. 48.0 ppb (44) 13.2 ppb (12) N/A 35.0 ppb (32) N/A N/A N/A 0.28 ppb (3) N/A 5.0 μg/m3 (21) 44.0
 
March 12, 2019, 8 a.m. 23.1 ppb (21) 6.0 ppb (6) N/A 17.0 ppb (16) N/A N/A N/A 0.21 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 12, 2019, 7 a.m. 19.0 ppb (18) 3.5 ppb (3) N/A 16.0 ppb (15) N/A N/A N/A 0.24 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 12, 2019, 6 a.m. 37.1 ppb (34) 11.6 ppb (11) N/A 25.0 ppb (23) N/A N/A N/A 0.32 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 12, 2019, 5 a.m. 58.4 ppb (55) 21.5 ppb (20) N/A 37.0 ppb (34) N/A N/A N/A 0.32 ppb (4) N/A 8.0 μg/m3 (33) 55.0
 
March 12, 2019, 4 a.m. 42.6 ppb (39) 15.1 ppb (14) N/A 28.0 ppb (26) N/A N/A N/A 0.29 ppb (3) N/A 5.0 μg/m3 (21) 39.0
 
March 12, 2019, 3 a.m. 31.6 ppb (29) 13.4 ppb (12) N/A 18.0 ppb (17) N/A N/A N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 29.0
 
March 12, 2019, 2 a.m. 25.8 ppb (24) 10.8 ppb (10) N/A 15.0 ppb (14) N/A N/A N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 24.0
 
March 12, 2019, 1 a.m. 29.7 ppb (28) 12.2 ppb (11) N/A 17.0 ppb (16) N/A N/A N/A 0.36 ppb (4) N/A 5.0 μg/m3 (21) 28.0
 
March 12, 2019, midnight 29.7 ppb (28) 13.2 ppb (12) N/A 16.0 ppb (15) N/A N/A N/A 0.43 ppb (5) N/A 5.0 μg/m3 (21) 28.0
 
March 11, 2019, 11 p.m. 60.4 ppb (57) 29.2 ppb (27) N/A 31.0 ppb (29) N/A N/A N/A 0.62 ppb (7) N/A 4.0 μg/m3 (17) 57.0
 
March 11, 2019, 10 p.m. 54.4 ppb (50) 27.5 ppb (25) N/A 27.0 ppb (25) N/A N/A N/A 0.59 ppb (7) N/A 5.0 μg/m3 (21) 50.0
 
March 11, 2019, 9 p.m. 71.2 ppb (68) 40.7 ppb (38) N/A 30.0 ppb (28) N/A N/A N/A 0.68 ppb (8) N/A 9.0 μg/m3 (38) 68.0
 
March 11, 2019, 8 p.m. 53.9 ppb (50) 25.4 ppb (24) N/A 29.0 ppb (27) N/A N/A N/A 0.55 ppb (6) N/A 10.0 μg/m3 (42) 50.0
 
March 11, 2019, 7 p.m. 67.7 ppb (65) 39.8 ppb (37) N/A 28.0 ppb (26) N/A N/A N/A 0.61 ppb (7) N/A 7.0 μg/m3 (29) 65.0
 
March 11, 2019, 6 p.m. 88.4 ppb (87) 47.9 ppb (44) N/A 40.0 ppb (37) N/A N/A N/A 0.67 ppb (7) N/A 8.0 μg/m3 (33) 87.0
 
March 11, 2019, 5 p.m. 93.8 ppb (92) 51.8 ppb (48) N/A 42.0 ppb (39) N/A N/A N/A 0.58 ppb (6) N/A 8.0 μg/m3 (33) 92.0
 
March 11, 2019, 4 p.m. 108.1 ppb (101) 68.0 ppb (65) N/A 40.0 ppb (37) N/A N/A N/A 0.61 ppb (7) N/A 12.0 μg/m3 (50) 101.0
 
March 11, 2019, 3 p.m. 134.1 ppb (106) 91.4 ppb (90) N/A 43.0 ppb (40) N/A N/A N/A 0.77 ppb (9) N/A 14.0 μg/m3 (54) 106.0