AQSQID: 250270023

Site Name: Worcester

Location: Worcester (Downtown Worcester), MA

Reporting: True, Located: True

Current AQI: 23.0

Worcester (Downtown Worcester) MA, US: 42.263901, -71.794701

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Feb. 17, 2020, 9 p.m. 9.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 17, 2020, 8 p.m. 10.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.3 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 17, 2020, 7 p.m. 7.0 ppb (6) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.2 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 17, 2020, 6 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.2 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 17, 2020, 5 p.m. 8.0 ppb (7) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.22 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 17, 2020, 4 p.m. 8.0 ppb (7) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.2 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 17, 2020, 3 p.m. 7.0 ppb (6) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.2 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 17, 2020, 2 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.21 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 17, 2020, 1 p.m. 13.0 ppb (12) 4.0 ppb (4) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 17, 2020, noon 25.0 ppb (23) 8.0 ppb (7) N/A 17.0 ppb (16) N/A 0.0 ppb (0) N/A 0.33 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Feb. 17, 2020, 11 a.m. 19.0 ppb (18) 3.0 ppb (3) N/A 16.0 ppb (15) N/A 0.0 ppb (0) N/A 0.31 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 17, 2020, 10 a.m. 91.0 ppb (89) 61.0 ppb (57) N/A 30.0 ppb (28) N/A 1.0 ppb (1) N/A 0.52 ppb (6) N/A 19.0 μg/m3 (65) 89.0
 
Feb. 17, 2020, 9 a.m. 126.0 ppb (105) 92.0 ppb (90) N/A 34.0 ppb (31) N/A 1.0 ppb (1) N/A 0.6 ppb (7) N/A 23.0 μg/m3 (73) 105.0
 
Feb. 17, 2020, 8 a.m. 86.0 ppb (84) 54.0 ppb (50) N/A 32.0 ppb (30) N/A 1.0 ppb (1) N/A 0.54 ppb (6) N/A 21.0 μg/m3 (69) 84.0
 
Feb. 17, 2020, 7 a.m. 54.0 ppb (50) 23.0 ppb (21) N/A 30.0 ppb (28) N/A 0.0 ppb (0) N/A 0.42 ppb (5) N/A 23.0 μg/m3 (73) 73.0
 
Feb. 17, 2020, 6 a.m. 49.0 ppb (45) 19.0 ppb (18) N/A 31.0 ppb (29) N/A 0.0 ppb (0) N/A 0.44 ppb (5) N/A 18.0 μg/m3 (63) 63.0
 
Feb. 17, 2020, 5 a.m. 37.0 ppb (34) 12.0 ppb (11) N/A 26.0 ppb (24) N/A 0.0 ppb (0) N/A 0.41 ppb (5) N/A 21.0 μg/m3 (69) 69.0
 
Feb. 17, 2020, 4 a.m. 49.0 ppb (45) 17.0 ppb (16) N/A 32.0 ppb (30) N/A 0.0 ppb (0) N/A 0.57 ppb (6) N/A N/A 45.0
 
Feb. 17, 2020, 3 a.m. 45.0 ppb (42) 13.0 ppb (12) N/A 32.0 ppb (30) N/A 0.0 ppb (0) N/A 0.46 ppb (5) N/A 21.0 μg/m3 (69) 69.0
 
Feb. 17, 2020, 2 a.m. 47.0 ppb (44) 14.0 ppb (13) N/A 33.0 ppb (31) N/A 0.0 ppb (0) N/A 0.48 ppb (5) N/A 23.0 μg/m3 (73) 73.0
 
Feb. 17, 2020, 1 a.m. 45.0 ppb (42) 12.0 ppb (11) N/A 34.0 ppb (31) N/A 0.0 ppb (0) N/A 0.5 ppb (6) N/A 21.0 μg/m3 (69) 69.0
 
Feb. 17, 2020, midnight 41.0 ppb (38) 10.0 ppb (9) N/A 31.0 ppb (29) N/A 0.0 ppb (0) N/A 0.46 ppb (5) N/A 18.0 μg/m3 (63) 63.0
 
Feb. 16, 2020, 11 p.m. 26.0 ppb (24) 5.0 ppb (5) N/A 21.0 ppb (19) N/A 0.0 ppb (0) N/A 0.39 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Feb. 16, 2020, 10 p.m. 23.0 ppb (21) 5.0 ppb (5) N/A 18.0 ppb (17) N/A 0.0 ppb (0) N/A 0.32 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Feb. 16, 2020, 9 p.m. 16.0 ppb (15) 4.0 ppb (4) N/A 12.0 ppb (11) N/A 0.0 ppb (0) N/A 0.3 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Feb. 16, 2020, 8 p.m. 20.0 ppb (19) 7.0 ppb (6) N/A 13.0 ppb (12) N/A 0.0 ppb (0) N/A 0.37 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Feb. 16, 2020, 7 p.m. 14.0 ppb (13) 5.0 ppb (5) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.27 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 16, 2020, 6 p.m. 13.0 ppb (12) 4.0 ppb (4) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 16, 2020, 5 p.m. 12.0 ppb (11) 3.0 ppb (3) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.27 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 16, 2020, 4 p.m. 13.0 ppb (12) 4.0 ppb (4) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 16, 2020, 3 p.m. 13.0 ppb (12) 4.0 ppb (4) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Feb. 16, 2020, 2 p.m. 13.0 ppb (12) 4.0 ppb (4) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 16, 2020, 1 p.m. 16.0 ppb (15) 4.0 ppb (4) N/A 12.0 ppb (11) N/A 0.0 ppb (0) N/A 0.26 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 16, 2020, noon 17.0 ppb (16) 3.0 ppb (3) N/A 14.0 ppb (13) N/A 0.0 ppb (0) N/A 0.28 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 16, 2020, 11 a.m. 15.0 ppb (14) 1.0 ppb (1) N/A 13.0 ppb (12) N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
Feb. 16, 2020, 10 a.m. 14.0 ppb (13) 1.0 ppb (1) N/A 14.0 ppb (13) N/A 0.0 ppb (0) N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Feb. 16, 2020, 9 a.m. 11.0 ppb (10) 1.0 ppb (1) N/A 11.0 ppb (10) N/A 0.0 ppb (0) N/A 0.22 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 16, 2020, 8 a.m. 12.0 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 16, 2020, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 16, 2020, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.22 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 16, 2020, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Feb. 16, 2020, 4 a.m. 14.0 ppb (13) 2.0 ppb (2) N/A 12.0 ppb (11) N/A N/A N/A 0.27 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 16, 2020, 3 a.m. 22.0 ppb (20) 4.0 ppb (4) N/A 17.0 ppb (16) N/A N/A N/A 0.28 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 16, 2020, 2 a.m. 15.0 ppb (14) 3.0 ppb (3) N/A 12.0 ppb (11) N/A N/A N/A 0.28 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Feb. 16, 2020, 1 a.m. 12.0 ppb (11) 2.0 ppb (2) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 16, 2020, midnight 12.0 ppb (11) 2.0 ppb (2) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 15, 2020, 11 p.m. 21.0 ppb (19) 5.0 ppb (5) N/A 16.0 ppb (15) N/A 0.0 ppb (0) N/A 0.28 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 15, 2020, 10 p.m. 14.0 ppb (13) 3.0 ppb (3) N/A 11.0 ppb (10) N/A 0.0 ppb (0) N/A 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Feb. 15, 2020, 9 p.m. 15.0 ppb (14) 4.0 ppb (4) N/A 11.0 ppb (10) N/A 0.0 ppb (0) N/A 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 15, 2020, 8 p.m. 11.0 ppb (10) 4.0 ppb (4) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.26 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 15, 2020, 7 p.m. 9.0 ppb (8) 3.0 ppb (3) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 15, 2020, 6 p.m. 8.0 ppb (7) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.21 ppb (2) N/A 2.0 μg/m3 (8) 8.0
 
Feb. 15, 2020, 5 p.m. 10.0 ppb (9) 4.0 ppb (4) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.22 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
Feb. 15, 2020, 4 p.m. 11.0 ppb (10) 4.0 ppb (4) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.22 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 15, 2020, 3 p.m. 20.0 ppb (19) 8.0 ppb (7) N/A 12.0 ppb (11) N/A 0.0 ppb (0) N/A 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Feb. 15, 2020, 2 p.m. 12.0 ppb (11) 4.0 ppb (4) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.26 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
Feb. 15, 2020, 1 p.m. 11.0 ppb (10) 4.0 ppb (4) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.49 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 15, 2020, noon 13.0 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.28 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 15, 2020, 11 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.14 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 15, 2020, 10 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.12 ppb (1) N/A 15.0 μg/m3 (56) 56.0
 
Feb. 15, 2020, 9 a.m. 8.0 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.11 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Feb. 15, 2020, 8 a.m. 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.1 ppb (1) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 15, 2020, 7 a.m. 8.0 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.12 ppb (1) N/A 7.0 μg/m3 (29) 29.0
 
Feb. 15, 2020, 6 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.12 ppb (1) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 15, 2020, 5 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.14 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 15, 2020, 4 a.m. 10.0 ppb (9) 2.0 ppb (2) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.2 ppb (2) N/A N/A 9.0
 
Feb. 15, 2020, 3 a.m. 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.2 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Feb. 15, 2020, 2 a.m. 14.0 ppb (13) 3.0 ppb (3) N/A 11.0 ppb (10) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Feb. 15, 2020, 1 a.m. 13.0 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.16 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 15, 2020, midnight 14.0 ppb (13) 4.0 ppb (4) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.19 ppb (2) N/A 17.0 μg/m3 (61) 61.0
 
Feb. 14, 2020, 11 p.m. 11.0 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 14, 2020, 10 p.m. 16.0 ppb (15) 6.0 ppb (6) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.35 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Feb. 14, 2020, 9 p.m. 17.0 ppb (16) 7.0 ppb (6) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.35 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 14, 2020, 8 p.m. 18.0 ppb (17) 9.0 ppb (8) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.31 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 14, 2020, 7 p.m. 13.0 ppb (12) 5.0 ppb (5) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.22 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 14, 2020, 6 p.m. 13.0 ppb (12) 5.0 ppb (5) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.21 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 14, 2020, 5 p.m. 13.0 ppb (12) 5.0 ppb (5) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 14, 2020, 4 p.m. 11.0 ppb (10) 4.0 ppb (4) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.21 ppb (2) N/A N/A 10.0
 
Feb. 14, 2020, 3 p.m. 14.0 ppb (13) 5.0 ppb (5) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A N/A 13.0
 
Feb. 14, 2020, 2 p.m. 16.0 ppb (15) 7.0 ppb (6) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.37 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 14, 2020, 1 p.m. 19.0 ppb (18) 8.0 ppb (7) N/A 11.0 ppb (10) N/A 0.0 ppb (0) N/A 0.41 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
Feb. 14, 2020, noon 13.0 ppb (12) 4.0 ppb (4) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.26 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 14, 2020, 11 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.17 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 14, 2020, 10 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.16 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 14, 2020, 9 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 14, 2020, 8 a.m. 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.2 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 14, 2020, 7 a.m. 11.0 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.2 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 14, 2020, 6 a.m. 11.0 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.2 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 14, 2020, 5 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.19 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 14, 2020, 4 a.m. 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Feb. 14, 2020, 3 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.21 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
Feb. 14, 2020, 2 a.m. 12.0 ppb (11) 2.0 ppb (2) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.27 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 14, 2020, 1 a.m. 18.0 ppb (17) 3.0 ppb (3) N/A 15.0 ppb (14) N/A 0.0 ppb (0) N/A 0.34 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 14, 2020, midnight 20.0 ppb (19) 4.0 ppb (4) N/A 16.0 ppb (15) N/A 0.0 ppb (0) N/A 0.4 ppb (4) N/A 4.0 μg/m3 (17) 19.0
 
Feb. 13, 2020, 11 p.m. 20.0 ppb (19) 4.0 ppb (4) N/A 16.0 ppb (15) N/A 0.0 ppb (0) N/A 0.36 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 13, 2020, 10 p.m. 32.0 ppb (30) 11.0 ppb (10) N/A 21.0 ppb (19) N/A 0.0 ppb (0) N/A 0.54 ppb (6) N/A 6.0 μg/m3 (25) 30.0
 
Feb. 13, 2020, 9 p.m. 26.0 ppb (24) 8.0 ppb (7) N/A 18.0 ppb (17) N/A 0.0 ppb (0) N/A 0.51 ppb (6) N/A 5.0 μg/m3 (21) 24.0
 
Feb. 13, 2020, 8 p.m. 39.0 ppb (36) 16.0 ppb (15) N/A 24.0 ppb (22) N/A 0.0 ppb (0) N/A 0.48 ppb (5) N/A 5.0 μg/m3 (21) 36.0
 
Feb. 13, 2020, 7 p.m. 37.0 ppb (34) 12.0 ppb (11) N/A 25.0 ppb (23) N/A 0.0 ppb (0) N/A 0.47 ppb (5) N/A 6.0 μg/m3 (25) 34.0
 
Feb. 13, 2020, 6 p.m. 50.0 ppb (46) 19.0 ppb (18) N/A 31.0 ppb (29) N/A 0.0 ppb (0) N/A 0.53 ppb (6) N/A 7.0 μg/m3 (29) 46.0
 
Feb. 13, 2020, 5 p.m. 56.0 ppb (52) 24.0 ppb (22) N/A 32.0 ppb (30) N/A 0.0 ppb (0) N/A 0.51 ppb (6) N/A 9.0 μg/m3 (38) 52.0
 
Feb. 13, 2020, 4 p.m. 68.0 ppb (65) 32.0 ppb (30) N/A 36.0 ppb (33) N/A 1.0 ppb (1) N/A 0.47 ppb (5) N/A 8.0 μg/m3 (33) 65.0
 
Feb. 13, 2020, 3 p.m. 58.0 ppb (54) 25.0 ppb (23) N/A 33.0 ppb (31) N/A 0.0 ppb (0) N/A 0.6 ppb (7) N/A 8.0 μg/m3 (33) 54.0
 
Feb. 13, 2020, 2 p.m. 76.0 ppb (73) 42.0 ppb (39) N/A 34.0 ppb (31) N/A 1.0 ppb (1) N/A 0.79 ppb (9) N/A 13.0 μg/m3 (52) 73.0
 
Feb. 13, 2020, 1 p.m. 61.0 ppb (57) 28.0 ppb (26) N/A 32.0 ppb (30) N/A 1.0 ppb (1) N/A 0.47 ppb (5) N/A 7.0 μg/m3 (29) 57.0
 
Feb. 13, 2020, noon 48.0 ppb (44) 19.0 ppb (18) N/A 28.0 ppb (26) N/A 0.0 ppb (0) N/A 0.58 ppb (6) N/A 7.0 μg/m3 (29) 44.0
 
Feb. 13, 2020, 11 a.m. 53.0 ppb (49) 24.0 ppb (22) N/A 29.0 ppb (27) N/A 0.0 ppb (0) N/A 0.4 ppb (4) N/A 10.0 μg/m3 (42) 49.0
 
Feb. 13, 2020, 10 a.m. 55.0 ppb (51) 24.0 ppb (22) N/A 32.0 ppb (30) N/A 0.0 ppb (0) N/A N/A N/A 9.0 μg/m3 (38) 51.0
 
Feb. 13, 2020, 9 a.m. 49.0 ppb (45) 20.0 ppb (19) N/A 30.0 ppb (28) N/A 0.0 ppb (0) N/A 0.28 ppb (3) N/A 9.0 μg/m3 (38) 45.0
 
Feb. 13, 2020, 8 a.m. 44.0 ppb (41) 14.0 ppb (13) N/A 30.0 ppb (28) N/A 0.0 ppb (0) N/A 0.29 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
Feb. 13, 2020, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 13, 2020, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 13, 2020, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.22 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 13, 2020, 4 a.m. 17.0 ppb (16) 3.0 ppb (3) N/A 13.0 ppb (12) N/A N/A N/A 0.25 ppb (3) N/A N/A 16.0
 
Feb. 13, 2020, 3 a.m. 12.0 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A N/A 0.22 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 13, 2020, 2 a.m. 20.0 ppb (19) 4.0 ppb (4) N/A 16.0 ppb (15) N/A N/A N/A 0.26 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
Feb. 13, 2020, 1 a.m. 18.0 ppb (17) 3.0 ppb (3) N/A 15.0 ppb (14) N/A 0.0 ppb (0) N/A 0.26 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 13, 2020, midnight 33.0 ppb (31) 7.0 ppb (6) N/A 26.0 ppb (24) N/A 0.0 ppb (0) N/A 0.35 ppb (4) N/A 7.0 μg/m3 (29) 31.0
 
Feb. 12, 2020, 11 p.m. 34.0 ppb (31) 7.0 ppb (6) N/A 27.0 ppb (25) N/A 0.0 ppb (0) N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 31.0
 
Feb. 12, 2020, 10 p.m. 29.0 ppb (27) 10.0 ppb (9) N/A 19.0 ppb (18) N/A 0.0 ppb (0) N/A 0.36 ppb (4) N/A 4.0 μg/m3 (17) 27.0
 
Feb. 12, 2020, 9 p.m. 19.0 ppb (18) 5.0 ppb (5) N/A 14.0 ppb (13) N/A 0.0 ppb (0) N/A 0.32 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 12, 2020, 8 p.m. 18.0 ppb (17) 6.0 ppb (6) N/A 11.0 ppb (10) N/A 0.0 ppb (0) N/A 0.29 ppb (3) N/A N/A 17.0
 
Feb. 12, 2020, 7 p.m. 15.0 ppb (14) 6.0 ppb (6) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A N/A 14.0
 
Feb. 12, 2020, 6 p.m. 14.0 ppb (13) 5.0 ppb (5) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.22 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Feb. 12, 2020, 5 p.m. 9.0 ppb (8) 4.0 ppb (4) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.18 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 12, 2020, 4 p.m. 9.0 ppb (8) 3.0 ppb (3) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.19 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 12, 2020, 3 p.m. 9.0 ppb (8) 4.0 ppb (4) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 12, 2020, 2 p.m. 11.0 ppb (10) 5.0 ppb (5) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.22 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 12, 2020, 1 p.m. 13.0 ppb (12) 5.0 ppb (5) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.21 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
Feb. 12, 2020, noon 11.0 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Feb. 12, 2020, 11 a.m. 11.0 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.19 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 12, 2020, 10 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.17 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Feb. 12, 2020, 9 a.m. 8.0 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.22 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
Feb. 12, 2020, 8 a.m. 9.0 ppb (8) 0.0 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.22 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
Feb. 12, 2020, 7 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.19 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 12, 2020, 6 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.2 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Feb. 12, 2020, 5 a.m. 8.0 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Feb. 12, 2020, 4 a.m. 11.0 ppb (10) 2.0 ppb (2) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.27 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 12, 2020, 3 a.m. 11.0 ppb (10) 2.0 ppb (2) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Feb. 12, 2020, 2 a.m. 13.0 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.27 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 12, 2020, 1 a.m. 18.0 ppb (17) 4.0 ppb (4) N/A 14.0 ppb (13) N/A 0.0 ppb (0) N/A 0.33 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 12, 2020, midnight 37.0 ppb (34) 16.0 ppb (15) N/A 22.0 ppb (20) N/A 0.0 ppb (0) N/A 0.5 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 11, 2020, 11 p.m. 46.0 ppb (43) 22.0 ppb (20) N/A 23.0 ppb (21) N/A 0.0 ppb (0) N/A 0.63 ppb (7) N/A 9.0 μg/m3 (38) 43.0
 
Feb. 11, 2020, 10 p.m. 55.0 ppb (51) 30.0 ppb (28) N/A 25.0 ppb (23) N/A 0.0 ppb (0) N/A 0.76 ppb (8) N/A 7.0 μg/m3 (29) 51.0
 
Feb. 11, 2020, 9 p.m. 56.0 ppb (52) 32.0 ppb (30) N/A 24.0 ppb (22) N/A 0.0 ppb (0) N/A 0.73 ppb (8) N/A 8.0 μg/m3 (33) 52.0
 
Feb. 11, 2020, 8 p.m. 47.0 ppb (44) 24.0 ppb (22) N/A 23.0 ppb (21) N/A 0.0 ppb (0) N/A 0.56 ppb (6) N/A 9.0 μg/m3 (38) 44.0
 
Feb. 11, 2020, 7 p.m. 50.0 ppb (46) 26.0 ppb (24) N/A 24.0 ppb (22) N/A 0.0 ppb (0) N/A 0.56 ppb (6) N/A 9.0 μg/m3 (38) 46.0
 
Feb. 11, 2020, 6 p.m. 42.0 ppb (39) 22.0 ppb (20) N/A 21.0 ppb (19) N/A 0.0 ppb (0) N/A 0.52 ppb (6) N/A 9.0 μg/m3 (38) 39.0
 
Feb. 11, 2020, 5 p.m. 36.0 ppb (33) 17.0 ppb (16) N/A 19.0 ppb (18) N/A 0.0 ppb (0) N/A 0.42 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 11, 2020, 4 p.m. 45.0 ppb (42) 26.0 ppb (24) N/A 19.0 ppb (18) N/A 0.0 ppb (0) N/A 0.43 ppb (5) N/A 7.0 μg/m3 (29) 42.0
 
Feb. 11, 2020, 3 p.m. 40.0 ppb (37) 23.0 ppb (21) N/A 18.0 ppb (17) N/A 0.0 ppb (0) N/A 0.55 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 11, 2020, 2 p.m. 49.0 ppb (45) 29.0 ppb (27) N/A 20.0 ppb (19) N/A 0.0 ppb (0) N/A 0.78 ppb (9) N/A 12.0 μg/m3 (50) 50.0
 
Feb. 11, 2020, 1 p.m. 55.0 ppb (51) 34.0 ppb (31) N/A 20.0 ppb (19) N/A 0.0 ppb (0) N/A 0.96 ppb (11) N/A 10.0 μg/m3 (42) 51.0
 
Feb. 11, 2020, noon 45.0 ppb (42) 22.0 ppb (20) N/A 23.0 ppb (21) N/A 0.0 ppb (0) N/A 0.6 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 11, 2020, 11 a.m. 41.0 ppb (38) 17.0 ppb (16) N/A 24.0 ppb (22) N/A 0.0 ppb (0) N/A 0.47 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 11, 2020, 10 a.m. 72.0 ppb (69) 48.0 ppb (44) N/A 24.0 ppb (22) N/A 1.0 ppb (1) N/A 0.58 ppb (6) N/A 12.0 μg/m3 (50) 69.0
 
Feb. 11, 2020, 9 a.m. 105.0 ppb (101) 79.0 ppb (77) N/A 26.0 ppb (24) N/A 1.0 ppb (1) N/A 0.64 ppb (7) N/A 17.0 μg/m3 (61) 101.0
 
Feb. 11, 2020, 8 a.m. 79.0 ppb (77) 54.0 ppb (50) N/A 24.0 ppb (22) N/A 0.0 ppb (0) N/A 0.64 ppb (7) N/A 16.0 μg/m3 (59) 77.0
 
Feb. 11, 2020, 7 a.m. 74.0 ppb (71) 50.0 ppb (46) N/A 24.0 ppb (22) N/A 1.0 ppb (1) N/A 0.75 ppb (8) N/A 19.0 μg/m3 (65) 71.0
 
Feb. 11, 2020, 6 a.m. 75.0 ppb (72) 50.0 ppb (46) N/A 25.0 ppb (23) N/A 1.0 ppb (1) N/A 0.6 ppb (7) N/A 20.0 μg/m3 (67) 72.0
 
Feb. 11, 2020, 5 a.m. 63.0 ppb (60) 36.0 ppb (33) N/A 27.0 ppb (25) N/A 0.0 ppb (0) N/A 0.5 ppb (6) N/A 21.0 μg/m3 (69) 69.0
 
Feb. 11, 2020, 4 a.m. 30.0 ppb (28) 9.0 ppb (8) N/A 21.0 ppb (19) N/A 0.0 ppb (0) N/A 0.44 ppb (5) N/A 17.0 μg/m3 (61) 61.0
 
Feb. 11, 2020, 3 a.m. 41.0 ppb (38) 15.0 ppb (14) N/A 26.0 ppb (24) N/A 0.0 ppb (0) N/A 0.43 ppb (5) N/A 17.0 μg/m3 (61) 61.0
 
Feb. 11, 2020, 2 a.m. 38.0 ppb (35) 11.0 ppb (10) N/A 26.0 ppb (24) N/A 0.0 ppb (0) N/A 0.41 ppb (5) N/A 17.0 μg/m3 (61) 61.0
 
Feb. 11, 2020, 1 a.m. 35.0 ppb (32) 9.0 ppb (8) N/A 26.0 ppb (24) N/A 0.0 ppb (0) N/A 0.39 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 11, 2020, midnight 41.0 ppb (38) 13.0 ppb (12) N/A 28.0 ppb (26) N/A 0.0 ppb (0) N/A 0.39 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 10, 2020, 11 p.m. 35.0 ppb (32) 9.0 ppb (8) N/A 26.0 ppb (24) N/A 0.0 ppb (0) N/A 0.41 ppb (5) N/A 14.0 μg/m3 (54) 54.0
 
Feb. 10, 2020, 10 p.m. 37.0 ppb (34) 13.0 ppb (12) N/A 24.0 ppb (22) N/A 0.0 ppb (0) N/A 0.49 ppb (5) N/A 15.0 μg/m3 (56) 56.0