AQSQID: 090030025

Site Name: Hartford-Huntley

Location: Hartford (Downtown), CT

Reporting: True, Located: True

Current AQI: 18.0

Hartford (Downtown) CT, US: 41.771444, -72.679923

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Feb. 14, 2020, 1 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.16 ppb (2) 9.0 μg/m3 (8) 3.5 μg/m3 (15) 15.0
 
Feb. 14, 2020, noon N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.14 ppb (2) 7.0 μg/m3 (6) 2.5 μg/m3 (10) 10.0
 
Feb. 14, 2020, 11 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.14 ppb (2) 6.0 μg/m3 (5) 2.7 μg/m3 (11) 11.0
 
Feb. 14, 2020, 10 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.13 ppb (1) 4.0 μg/m3 (4) 2.8 μg/m3 (12) 12.0
 
Feb. 14, 2020, 9 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.16 ppb (2) 5.0 μg/m3 (5) 4.3 μg/m3 (18) 18.0
 
Feb. 14, 2020, 8 a.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.25 ppb (3) 8.0 μg/m3 (7) 5.9 μg/m3 (25) 25.0
 
Feb. 14, 2020, 7 a.m. N/A N/A N/A 22.0 ppb (20) N/A N/A N/A N/A 10.0 μg/m3 (9) 6.2 μg/m3 (26) 26.0
 
Feb. 14, 2020, 6 a.m. N/A N/A N/A 20.0 ppb (19) N/A N/A N/A 0.38 ppb (4) 10.0 μg/m3 (9) 6.3 μg/m3 (26) 26.0
 
Feb. 14, 2020, 5 a.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.24 ppb (3) 9.0 μg/m3 (8) 5.3 μg/m3 (22) 22.0
 
Feb. 14, 2020, 4 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.17 ppb (2) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
Feb. 14, 2020, 3 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.17 ppb (2) 7.0 μg/m3 (6) 4.9 μg/m3 (20) 20.0
 
Feb. 14, 2020, 2 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) 6.0 μg/m3 (5) 4.7 μg/m3 (20) 20.0
 
Feb. 14, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A N/A 0.21 ppb (2) 6.0 μg/m3 (5) 4.5 μg/m3 (19) 19.0
 
Feb. 14, 2020, midnight N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.25 ppb (3) 6.0 μg/m3 (5) 4.8 μg/m3 (20) 20.0
 
Feb. 13, 2020, 11 p.m. N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 0.29 ppb (3) 6.0 μg/m3 (5) 4.3 μg/m3 (18) 18.0
 
Feb. 13, 2020, 10 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.3 ppb (3) 6.0 μg/m3 (5) 4.1 μg/m3 (17) 17.0
 
Feb. 13, 2020, 9 p.m. N/A N/A N/A 20.0 ppb (19) N/A N/A N/A 0.48 ppb (5) 8.0 μg/m3 (7) 5.1 μg/m3 (21) 21.0
 
Feb. 13, 2020, 8 p.m. N/A N/A N/A 27.0 ppb (25) N/A N/A N/A 0.63 ppb (7) 13.0 μg/m3 (12) 7.9 μg/m3 (33) 33.0
 
Feb. 13, 2020, 7 p.m. N/A N/A N/A 29.0 ppb (27) N/A N/A N/A 0.56 ppb (6) 18.0 μg/m3 (16) 9.4 μg/m3 (39) 39.0
 
Feb. 13, 2020, 6 p.m. N/A N/A N/A 30.0 ppb (28) N/A N/A N/A 0.49 ppb (5) 16.0 μg/m3 (15) 8.9 μg/m3 (37) 37.0
 
Feb. 13, 2020, 5 p.m. N/A N/A N/A 25.0 ppb (23) N/A N/A N/A 0.42 ppb (5) 12.0 μg/m3 (11) 7.8 μg/m3 (32) 32.0
 
Feb. 13, 2020, 4 p.m. N/A N/A N/A 31.0 ppb (29) N/A N/A N/A 0.59 ppb (7) 21.0 μg/m3 (19) 12.6 μg/m3 (51) 51.0
 
Feb. 13, 2020, 3 p.m. N/A N/A N/A 32.0 ppb (30) N/A N/A N/A 0.58 ppb (6) 19.0 μg/m3 (17) 13.0 μg/m3 (52) 52.0
 
Feb. 13, 2020, 2 p.m. N/A N/A N/A 28.0 ppb (26) N/A N/A N/A N/A 17.0 μg/m3 (15) 11.1 μg/m3 (46) 46.0
 
Feb. 13, 2020, 1 p.m. N/A N/A N/A 26.0 ppb (24) N/A N/A N/A N/A 15.0 μg/m3 (14) 10.1 μg/m3 (42) 42.0
 
Feb. 13, 2020, noon N/A N/A N/A 30.0 ppb (28) N/A N/A N/A 0.36 ppb (4) 15.0 μg/m3 (14) 10.8 μg/m3 (45) 45.0
 
Feb. 13, 2020, 11 a.m. N/A N/A N/A 29.0 ppb (27) N/A N/A N/A 0.33 ppb (4) 12.0 μg/m3 (11) 9.4 μg/m3 (39) 39.0
 
Feb. 13, 2020, 10 a.m. N/A N/A N/A 24.0 ppb (22) N/A N/A N/A 0.26 ppb (3) 12.0 μg/m3 (11) 9.2 μg/m3 (38) 38.0
 
Feb. 13, 2020, 9 a.m. N/A N/A N/A 30.0 ppb (28) N/A N/A N/A 0.3 ppb (3) 15.0 μg/m3 (14) 12.1 μg/m3 (50) 50.0
 
Feb. 13, 2020, 8 a.m. N/A N/A N/A 18.0 ppb (17) N/A N/A N/A 0.23 ppb (3) 13.0 μg/m3 (12) 10.5 μg/m3 (44) 44.0
 
Feb. 13, 2020, 7 a.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A N/A 13.0 μg/m3 (12) 10.4 μg/m3 (43) 43.0
 
Feb. 13, 2020, 6 a.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.23 ppb (3) 14.0 μg/m3 (13) 10.6 μg/m3 (44) 44.0
 
Feb. 13, 2020, 5 a.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.21 ppb (2) 16.0 μg/m3 (15) 11.5 μg/m3 (48) 48.0
 
Feb. 13, 2020, 4 a.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.25 ppb (3) 17.0 μg/m3 (15) 12.0 μg/m3 (50) 50.0
 
Feb. 13, 2020, 3 a.m. N/A N/A N/A 18.0 ppb (17) N/A N/A N/A 0.36 ppb (4) 22.0 μg/m3 (20) 14.0 μg/m3 (54) 54.0
 
Feb. 13, 2020, 2 a.m. N/A N/A N/A 18.0 ppb (17) N/A N/A N/A 0.38 ppb (4) 22.0 μg/m3 (20) 13.9 μg/m3 (54) 54.0
 
Feb. 13, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A N/A 0.39 ppb (4) 22.0 μg/m3 (20) 12.7 μg/m3 (51) 51.0
 
Feb. 13, 2020, midnight N/A N/A N/A 22.0 ppb (20) N/A N/A N/A 0.4 ppb (4) 22.0 μg/m3 (20) 12.5 μg/m3 (51) 51.0
 
Feb. 12, 2020, 11 p.m. N/A N/A N/A 24.0 ppb (22) N/A N/A N/A 0.52 ppb (6) 21.0 μg/m3 (19) 12.3 μg/m3 (51) 51.0
 
Feb. 12, 2020, 10 p.m. N/A N/A N/A 21.0 ppb (19) N/A N/A N/A 0.45 ppb (5) 19.0 μg/m3 (17) 10.6 μg/m3 (44) 44.0
 
Feb. 12, 2020, 9 p.m. N/A N/A N/A 21.0 ppb (19) N/A N/A N/A 0.44 ppb (5) 18.0 μg/m3 (16) 9.1 μg/m3 (38) 38.0
 
Feb. 12, 2020, 8 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.45 ppb (5) 16.0 μg/m3 (15) 7.3 μg/m3 (30) 30.0
 
Feb. 12, 2020, 7 p.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.37 ppb (4) 14.0 μg/m3 (13) 6.4 μg/m3 (27) 27.0
 
Feb. 12, 2020, 6 p.m. N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 0.3 ppb (3) 14.0 μg/m3 (13) 6.0 μg/m3 (25) 25.0
 
Feb. 12, 2020, 5 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.22 ppb (2) 11.0 μg/m3 (10) 5.5 μg/m3 (23) 23.0
 
Feb. 12, 2020, 4 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) 8.0 μg/m3 (7) 4.9 μg/m3 (20) 20.0
 
Feb. 12, 2020, 3 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.14 ppb (2) 11.0 μg/m3 (10) 6.2 μg/m3 (26) 26.0
 
Feb. 12, 2020, 2 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.16 ppb (2) 9.0 μg/m3 (8) 5.0 μg/m3 (21) 21.0
 
Feb. 12, 2020, 1 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.16 ppb (2) 8.0 μg/m3 (7) 4.9 μg/m3 (20) 20.0
 
Feb. 12, 2020, noon N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.18 ppb (2) 10.0 μg/m3 (9) 6.1 μg/m3 (25) 25.0
 
Feb. 12, 2020, 11 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.16 ppb (2) 9.0 μg/m3 (8) 6.1 μg/m3 (25) 25.0
 
Feb. 12, 2020, 10 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.15 ppb (2) 11.0 μg/m3 (10) 8.0 μg/m3 (33) 33.0
 
Feb. 12, 2020, 9 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.17 ppb (2) 11.0 μg/m3 (10) 8.4 μg/m3 (35) 35.0
 
Feb. 12, 2020, 8 a.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.19 ppb (2) 12.0 μg/m3 (11) 9.5 μg/m3 (40) 40.0
 
Feb. 12, 2020, 7 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A N/A 12.0 μg/m3 (11) 9.4 μg/m3 (39) 39.0
 
Feb. 12, 2020, 6 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.17 ppb (2) 12.0 μg/m3 (11) 9.6 μg/m3 (40) 40.0
 
Feb. 12, 2020, 5 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.19 ppb (2) 11.0 μg/m3 (10) 9.2 μg/m3 (38) 38.0
 
Feb. 12, 2020, 4 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.19 ppb (2) 10.0 μg/m3 (9) 8.1 μg/m3 (34) 34.0
 
Feb. 12, 2020, 3 a.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.22 ppb (2) 11.0 μg/m3 (10) 9.1 μg/m3 (38) 38.0
 
Feb. 12, 2020, 2 a.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.25 ppb (3) 11.0 μg/m3 (10) 8.9 μg/m3 (37) 37.0
 
Feb. 12, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A N/A 0.33 ppb (4) 11.0 μg/m3 (10) 8.2 μg/m3 (34) 34.0
 
Feb. 12, 2020, midnight N/A N/A N/A 21.0 ppb (19) N/A N/A N/A 0.48 ppb (5) 12.0 μg/m3 (11) 9.0 μg/m3 (38) 38.0
 
Feb. 11, 2020, 11 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.4 ppb (4) 10.0 μg/m3 (9) 7.7 μg/m3 (32) 32.0
 
Feb. 11, 2020, 10 p.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.36 ppb (4) 10.0 μg/m3 (9) 7.9 μg/m3 (33) 33.0
 
Feb. 11, 2020, 9 p.m. N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 0.32 ppb (4) 9.0 μg/m3 (8) 6.8 μg/m3 (28) 28.0
 
Feb. 11, 2020, 8 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.31 ppb (3) 9.0 μg/m3 (8) 6.8 μg/m3 (28) 28.0
 
Feb. 11, 2020, 7 p.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.31 ppb (3) 11.0 μg/m3 (10) 7.6 μg/m3 (32) 32.0
 
Feb. 11, 2020, 6 p.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.31 ppb (3) 11.0 μg/m3 (10) 8.6 μg/m3 (36) 36.0
 
Feb. 11, 2020, 5 p.m. N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 0.34 ppb (4) 13.0 μg/m3 (12) 10.0 μg/m3 (42) 42.0
 
Feb. 11, 2020, 4 p.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.37 ppb (4) 18.0 μg/m3 (16) 13.4 μg/m3 (53) 53.0
 
Feb. 11, 2020, 3 p.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.38 ppb (4) 20.0 μg/m3 (18) 15.2 μg/m3 (57) 57.0
 
Feb. 11, 2020, 2 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.4 ppb (4) 21.0 μg/m3 (19) 15.6 μg/m3 (58) 58.0
 
Feb. 11, 2020, 1 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A N/A 0.41 ppb (5) 19.0 μg/m3 (17) 14.7 μg/m3 (56) 56.0
 
Feb. 11, 2020, noon N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.4 ppb (4) 19.0 μg/m3 (17) 14.8 μg/m3 (56) 56.0
 
Feb. 11, 2020, 11 a.m. N/A N/A N/A 18.0 ppb (17) N/A N/A N/A 0.34 ppb (4) 20.0 μg/m3 (18) 15.2 μg/m3 (57) 57.0
 
Feb. 11, 2020, 10 a.m. N/A N/A N/A 21.0 ppb (19) N/A N/A N/A 0.38 ppb (4) 24.0 μg/m3 (22) 17.3 μg/m3 (61) 61.0
 
Feb. 11, 2020, 9 a.m. N/A N/A N/A 21.0 ppb (19) N/A N/A N/A 0.45 ppb (5) 29.0 μg/m3 (26) 20.0 μg/m3 (67) 67.0
 
Feb. 11, 2020, 8 a.m. N/A N/A N/A 23.0 ppb (21) N/A N/A N/A 0.43 ppb (5) 27.0 μg/m3 (25) 19.9 μg/m3 (67) 67.0
 
Feb. 11, 2020, 7 a.m. N/A N/A N/A 23.0 ppb (21) N/A N/A N/A N/A 27.0 μg/m3 (25) 21.5 μg/m3 (70) 70.0
 
Feb. 11, 2020, 6 a.m. N/A N/A N/A 25.0 ppb (23) N/A N/A N/A 0.51 ppb (6) 27.0 μg/m3 (25) 21.4 μg/m3 (70) 70.0
 
Feb. 11, 2020, 5 a.m. N/A N/A N/A 26.0 ppb (24) N/A N/A N/A 0.53 ppb (6) 27.0 μg/m3 (25) 21.6 μg/m3 (70) 70.0
 
Feb. 11, 2020, 4 a.m. N/A N/A N/A 26.0 ppb (24) N/A N/A N/A 0.63 ppb (7) 26.0 μg/m3 (24) 20.4 μg/m3 (68) 68.0
 
Feb. 11, 2020, 3 a.m. N/A N/A N/A 28.0 ppb (26) N/A N/A N/A 0.65 ppb (7) 27.0 μg/m3 (25) 20.9 μg/m3 (69) 69.0
 
Feb. 11, 2020, 2 a.m. N/A N/A N/A 29.0 ppb (27) N/A N/A N/A 0.62 ppb (7) 26.0 μg/m3 (24) 19.9 μg/m3 (67) 67.0
 
Feb. 11, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A N/A 0.63 ppb (7) 24.0 μg/m3 (22) 18.1 μg/m3 (63) 63.0
 
Feb. 11, 2020, midnight N/A N/A N/A 28.0 ppb (26) N/A N/A N/A 0.61 ppb (7) 26.0 μg/m3 (24) 17.9 μg/m3 (63) 63.0
 
Feb. 10, 2020, 11 p.m. N/A N/A N/A 28.0 ppb (26) N/A N/A N/A 0.6 ppb (7) 28.0 μg/m3 (25) 17.3 μg/m3 (61) 61.0
 
Feb. 10, 2020, 10 p.m. N/A N/A N/A 30.0 ppb (28) N/A N/A N/A 0.65 ppb (7) 18.0 μg/m3 (16) 12.4 μg/m3 (51) 51.0
 
Feb. 10, 2020, 9 p.m. N/A N/A N/A 26.0 ppb (24) N/A N/A N/A 0.58 ppb (6) 16.0 μg/m3 (15) 10.9 μg/m3 (45) 45.0
 
Feb. 10, 2020, 8 p.m. N/A N/A N/A 25.0 ppb (23) N/A N/A N/A 0.54 ppb (6) 17.0 μg/m3 (15) 10.6 μg/m3 (44) 44.0
 
Feb. 10, 2020, 7 p.m. N/A N/A N/A 25.0 ppb (23) N/A N/A N/A 0.49 ppb (5) 17.0 μg/m3 (15) 11.2 μg/m3 (47) 47.0
 
Feb. 10, 2020, 6 p.m. N/A N/A N/A 25.0 ppb (23) N/A N/A N/A N/A 18.0 μg/m3 (16) 11.8 μg/m3 (49) 49.0
 
Feb. 10, 2020, 5 p.m. N/A N/A N/A 21.0 ppb (19) N/A N/A N/A N/A 22.0 μg/m3 (20) 12.8 μg/m3 (52) 52.0
 
Feb. 10, 2020, 4 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A N/A N/A 25.0 μg/m3 (23) 14.1 μg/m3 (54) 54.0
 
Feb. 10, 2020, 3 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A N/A N/A 25.0 μg/m3 (23) 13.1 μg/m3 (52) 52.0
 
Feb. 10, 2020, 2 p.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A N/A 19.0 μg/m3 (17) 10.1 μg/m3 (42) 42.0
 
Feb. 10, 2020, 1 p.m. N/A N/A N/A 14.0 ppb (13) N/A N/A N/A N/A 14.0 μg/m3 (13) 8.3 μg/m3 (35) 35.0
 
Feb. 10, 2020, noon N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.28 ppb (3) 16.0 μg/m3 (15) 9.2 μg/m3 (38) 38.0
 
Feb. 10, 2020, 11 a.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.26 ppb (3) 18.0 μg/m3 (16) 9.6 μg/m3 (40) 40.0
 
Feb. 10, 2020, 10 a.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.25 ppb (3) 21.0 μg/m3 (19) 10.9 μg/m3 (45) 45.0
 
Feb. 10, 2020, 9 a.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.24 ppb (3) 15.0 μg/m3 (14) 9.5 μg/m3 (40) 40.0
 
Feb. 10, 2020, 8 a.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.22 ppb (2) 14.0 μg/m3 (13) 9.3 μg/m3 (39) 39.0
 
Feb. 10, 2020, 7 a.m. N/A N/A N/A 25.0 ppb (23) N/A N/A N/A N/A 24.0 μg/m3 (22) 17.7 μg/m3 (62) 62.0
 
Feb. 10, 2020, 6 a.m. N/A N/A N/A 26.0 ppb (24) N/A N/A N/A 0.42 ppb (5) 25.0 μg/m3 (23) 19.3 μg/m3 (66) 66.0
 
Feb. 10, 2020, 5 a.m. N/A N/A N/A 23.0 ppb (21) N/A N/A N/A 0.37 ppb (4) 23.0 μg/m3 (21) 18.3 μg/m3 (63) 63.0
 
Feb. 10, 2020, 4 a.m. N/A N/A N/A 24.0 ppb (22) N/A N/A N/A 0.37 ppb (4) 24.0 μg/m3 (22) 18.2 μg/m3 (63) 63.0
 
Feb. 10, 2020, 3 a.m. N/A N/A N/A 25.0 ppb (23) N/A N/A N/A 0.39 ppb (4) 24.0 μg/m3 (22) 17.6 μg/m3 (62) 62.0
 
Feb. 10, 2020, 2 a.m. N/A N/A N/A 22.0 ppb (20) N/A N/A N/A 0.36 ppb (4) 24.0 μg/m3 (22) 16.9 μg/m3 (60) 60.0
 
Feb. 10, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A N/A 0.31 ppb (3) 19.0 μg/m3 (17) 14.3 μg/m3 (55) 55.0
 
Feb. 10, 2020, midnight N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.28 ppb (3) 19.0 μg/m3 (17) 13.3 μg/m3 (53) 53.0
 
Feb. 9, 2020, 11 p.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.31 ppb (3) 18.0 μg/m3 (16) 13.4 μg/m3 (53) 53.0
 
Feb. 9, 2020, 10 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.28 ppb (3) 17.0 μg/m3 (15) 11.2 μg/m3 (47) 47.0
 
Feb. 9, 2020, 9 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.27 ppb (3) 16.0 μg/m3 (15) 10.3 μg/m3 (43) 43.0
 
Feb. 9, 2020, 8 p.m. N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 0.27 ppb (3) 15.0 μg/m3 (14) 10.1 μg/m3 (42) 42.0
 
Feb. 9, 2020, 7 p.m. N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 0.27 ppb (3) 16.0 μg/m3 (15) 11.0 μg/m3 (46) 46.0
 
Feb. 9, 2020, 6 p.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.28 ppb (3) 17.0 μg/m3 (15) 10.5 μg/m3 (44) 44.0
 
Feb. 9, 2020, 5 p.m. N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 0.33 ppb (4) 18.0 μg/m3 (16) 11.0 μg/m3 (46) 46.0
 
Feb. 9, 2020, 4 p.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.23 ppb (3) 14.0 μg/m3 (13) 9.3 μg/m3 (39) 39.0
 
Feb. 9, 2020, 3 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.21 ppb (2) 12.0 μg/m3 (11) 8.2 μg/m3 (34) 34.0
 
Feb. 9, 2020, 2 p.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.22 ppb (2) 12.0 μg/m3 (11) 8.0 μg/m3 (33) 33.0
 
Feb. 9, 2020, 1 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.23 ppb (3) 12.0 μg/m3 (11) 7.9 μg/m3 (33) 33.0
 
Feb. 9, 2020, noon N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.23 ppb (3) 12.0 μg/m3 (11) 7.9 μg/m3 (33) 33.0
 
Feb. 9, 2020, 11 a.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.21 ppb (2) 10.0 μg/m3 (9) 6.8 μg/m3 (28) 28.0
 
Feb. 9, 2020, 10 a.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.18 ppb (2) 9.0 μg/m3 (8) 6.6 μg/m3 (28) 28.0
 
Feb. 9, 2020, 9 a.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.19 ppb (2) 10.0 μg/m3 (9) 6.6 μg/m3 (28) 28.0
 
Feb. 9, 2020, 8 a.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.17 ppb (2) 9.0 μg/m3 (8) 6.1 μg/m3 (25) 25.0
 
Feb. 9, 2020, 7 a.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A N/A 10.0 μg/m3 (9) 6.1 μg/m3 (25) 25.0
 
Feb. 9, 2020, 6 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.17 ppb (2) 9.0 μg/m3 (8) 6.0 μg/m3 (25) 25.0
 
Feb. 9, 2020, 5 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.18 ppb (2) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 25.0
 
Feb. 9, 2020, 4 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.18 ppb (2) 9.0 μg/m3 (8) 6.2 μg/m3 (26) 26.0
 
Feb. 9, 2020, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.18 ppb (2) 9.0 μg/m3 (8) 5.6 μg/m3 (23) 23.0
 
Feb. 9, 2020, 2 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.17 ppb (2) 9.0 μg/m3 (8) 5.7 μg/m3 (24) 24.0
 
Feb. 9, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A N/A 0.25 ppb (3) 11.0 μg/m3 (10) 6.7 μg/m3 (28) 28.0
 
Feb. 9, 2020, midnight N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.26 ppb (3) 10.0 μg/m3 (9) 6.1 μg/m3 (25) 25.0
 
Feb. 8, 2020, 11 p.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.22 ppb (2) 9.0 μg/m3 (8) 5.4 μg/m3 (23) 23.0
 
Feb. 8, 2020, 10 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.18 ppb (2) 9.0 μg/m3 (8) 4.9 μg/m3 (20) 20.0
 
Feb. 8, 2020, 9 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.25 ppb (3) 9.0 μg/m3 (8) 5.2 μg/m3 (22) 22.0
 
Feb. 8, 2020, 8 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.26 ppb (3) 10.0 μg/m3 (9) 5.1 μg/m3 (21) 21.0
 
Feb. 8, 2020, 7 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.21 ppb (2) 10.0 μg/m3 (9) 4.7 μg/m3 (20) 20.0
 
Feb. 8, 2020, 6 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.24 ppb (3) 12.0 μg/m3 (11) 4.5 μg/m3 (19) 19.0
 
Feb. 8, 2020, 5 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.27 ppb (3) 10.0 μg/m3 (9) 4.6 μg/m3 (19) 19.0
 
Feb. 8, 2020, 4 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.29 ppb (3) 11.0 μg/m3 (10) 4.8 μg/m3 (20) 20.0
 
Feb. 8, 2020, 3 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.24 ppb (3) 11.0 μg/m3 (10) 4.4 μg/m3 (18) 18.0
 
Feb. 8, 2020, 2 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.18 ppb (2) 7.0 μg/m3 (6) 3.9 μg/m3 (16) 16.0
 
Feb. 8, 2020, 1 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.22 ppb (2) 9.0 μg/m3 (8) 3.9 μg/m3 (16) 16.0
 
Feb. 8, 2020, noon N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.3 ppb (3) 9.0 μg/m3 (8) 3.9 μg/m3 (16) 18.0
 
Feb. 8, 2020, 11 a.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.18 ppb (2) 7.0 μg/m3 (6) 3.4 μg/m3 (14) 14.0
 
Feb. 8, 2020, 10 a.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.17 ppb (2) 5.0 μg/m3 (5) 3.4 μg/m3 (14) 14.0
 
Feb. 8, 2020, 9 a.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.17 ppb (2) 5.0 μg/m3 (5) 3.1 μg/m3 (13) 13.0
 
Feb. 8, 2020, 8 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.15 ppb (2) 5.0 μg/m3 (5) 2.8 μg/m3 (12) 12.0
 
Feb. 8, 2020, 7 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A N/A 5.0 μg/m3 (5) 2.5 μg/m3 (10) 10.0
 
Feb. 8, 2020, 6 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.14 ppb (2) 4.0 μg/m3 (4) 2.1 μg/m3 (9) 9.0
 
Feb. 8, 2020, 5 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.14 ppb (2) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 8.0
 
Feb. 8, 2020, 4 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.15 ppb (2) 3.0 μg/m3 (3) 2.2 μg/m3 (9) 9.0
 
Feb. 8, 2020, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.18 ppb (2) 5.0 μg/m3 (5) 2.2 μg/m3 (9) 9.0
 
Feb. 8, 2020, 2 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.17 ppb (2) 4.0 μg/m3 (4) 2.3 μg/m3 (10) 10.0
 
Feb. 8, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A N/A 0.16 ppb (2) 4.0 μg/m3 (4) 2.3 μg/m3 (10) 10.0
 
Feb. 8, 2020, midnight N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) 4.0 μg/m3 (4) 2.3 μg/m3 (10) 10.0
 
Feb. 7, 2020, 11 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) 4.0 μg/m3 (4) 2.3 μg/m3 (10) 10.0
 
Feb. 7, 2020, 10 p.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.35 ppb (4) 5.0 μg/m3 (5) 2.8 μg/m3 (12) 12.0
 
Feb. 7, 2020, 9 p.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.35 ppb (4) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 10.0
 
Feb. 7, 2020, 8 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.31 ppb (3) 1.0 μg/m3 (1) 0.7 μg/m3 (3) 6.0
 
Feb. 7, 2020, 7 p.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.41 ppb (5) 9.0 μg/m3 (8) 5.1 μg/m3 (21) 21.0
 
Feb. 7, 2020, 6 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.32 ppb (4) 7.0 μg/m3 (6) 4.4 μg/m3 (18) 18.0
 
Feb. 7, 2020, 5 p.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.33 ppb (4) 5.0 μg/m3 (5) 3.1 μg/m3 (13) 16.0
 
Feb. 7, 2020, 4 p.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.29 ppb (3) 3.0 μg/m3 (3) 2.5 μg/m3 (10) 12.0
 
Feb. 7, 2020, 3 p.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.29 ppb (3) 4.0 μg/m3 (4) 3.4 μg/m3 (14) 14.0
 
Feb. 7, 2020, 2 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.28 ppb (3) 7.0 μg/m3 (6) 4.5 μg/m3 (19) 19.0