AQSQID: 250270023

Site Name: Worcester

Location: Worcester (Asylum St), MA

Reporting: True, Located: True

Current AQI: 54.0

Worcester (Asylum St) MA, US: 42.263901, -71.794701

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 23, 2019, 6 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) N/A 0.29 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 23, 2019, 5 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) N/A 0.25 ppb (3) N/A 16.0 μg/m3 (59) 59.0
 
Sept. 23, 2019, 4 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 8.0 ppb (7) N/A 1.0 ppb (1) N/A 0.25 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 23, 2019, 3 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A 0.28 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 23, 2019, 2 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A 0.28 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 23, 2019, 1 a.m. 8.0 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A 1.0 ppb (1) N/A 0.31 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 23, 2019, midnight 9.0 ppb (8) 0.0 ppb (0) N/A 9.0 ppb (8) N/A 1.0 ppb (1) N/A 0.34 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 22, 2019, 11 p.m. 11.0 ppb (10) 0.0 ppb (0) N/A 11.0 ppb (10) N/A 1.0 ppb (1) N/A 0.34 ppb (4) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 22, 2019, 10 p.m. 16.0 ppb (15) 2.0 ppb (2) N/A 14.0 ppb (13) N/A 1.0 ppb (1) N/A 0.33 ppb (4) N/A 15.0 μg/m3 (56) 56.0
 
Sept. 22, 2019, 9 p.m. 7.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A 0.3 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 22, 2019, 8 p.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) N/A 0.3 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 22, 2019, 7 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) N/A 0.26 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 22, 2019, 6 p.m. 5.0 ppb (5) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) N/A 0.26 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 22, 2019, 5 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) N/A 0.25 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 22, 2019, 4 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) N/A 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 22, 2019, 3 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A 0.27 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 22, 2019, 2 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.29 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 22, 2019, 1 p.m. 9.0 ppb (8) 1.0 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 22, 2019, noon 18.0 ppb (17) 6.0 ppb (6) N/A 12.0 ppb (11) N/A 0.0 ppb (0) N/A 0.33 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 22, 2019, 11 a.m. 10.0 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.34 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 22, 2019, 10 a.m. 10.0 ppb (9) 0.0 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 22, 2019, 9 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.3 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 22, 2019, 8 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.31 ppb (3) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 22, 2019, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 0.33 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 22, 2019, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 0.35 ppb (4) N/A 16.0 μg/m3 (59) 59.0
 
Sept. 22, 2019, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 0.34 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 22, 2019, 4 a.m. 10.0 ppb (9) 0.0 ppb (0) N/A 10.0 ppb (9) N/A 1.0 ppb (1) N/A 0.38 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 22, 2019, 3 a.m. 15.0 ppb (14) 1.0 ppb (1) N/A 14.0 ppb (13) N/A 1.0 ppb (1) N/A 0.36 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 22, 2019, 2 a.m. 19.0 ppb (18) 1.0 ppb (1) N/A 18.0 ppb (17) N/A 1.0 ppb (1) N/A 0.44 ppb (5) N/A 16.0 μg/m3 (59) 59.0
 
Sept. 22, 2019, 1 a.m. 17.0 ppb (16) 1.0 ppb (1) N/A 16.0 ppb (15) N/A 1.0 ppb (1) N/A 0.43 ppb (5) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 22, 2019, midnight 15.0 ppb (14) 1.0 ppb (1) N/A 14.0 ppb (13) N/A 0.0 ppb (0) N/A 0.4 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 21, 2019, 11 p.m. 16.0 ppb (15) 2.0 ppb (2) N/A 14.0 ppb (13) N/A 1.0 ppb (1) N/A 0.38 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 21, 2019, 10 p.m. 12.0 ppb (11) 2.0 ppb (2) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 21, 2019, 9 p.m. 8.0 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.27 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 21, 2019, 8 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.26 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 21, 2019, 7 p.m. 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A 0.29 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 21, 2019, 6 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.28 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 21, 2019, 5 p.m. 9.0 ppb (8) 1.0 ppb (1) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A 0.27 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 21, 2019, 4 p.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.27 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
Sept. 21, 2019, 3 p.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.26 ppb (3) N/A 16.0 μg/m3 (59) 59.0
 
Sept. 21, 2019, 2 p.m. 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.28 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 21, 2019, 1 p.m. 30.0 ppb (28) 13.0 ppb (12) N/A 18.0 ppb (17) N/A 1.0 ppb (1) N/A 0.39 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 21, 2019, noon 61.0 ppb (57) 31.0 ppb (29) N/A 29.0 ppb (27) N/A 1.0 ppb (1) N/A 0.46 ppb (5) N/A 13.0 μg/m3 (52) 57.0
 
Sept. 21, 2019, 11 a.m. 48.0 ppb (44) 19.0 ppb (18) N/A 29.0 ppb (27) N/A 1.0 ppb (1) N/A 0.49 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 21, 2019, 10 a.m. 30.0 ppb (28) 5.0 ppb (5) N/A 25.0 ppb (23) N/A N/A N/A 0.38 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 21, 2019, 9 a.m. 33.0 ppb (31) 7.0 ppb (6) N/A 27.0 ppb (25) N/A N/A N/A 0.33 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 21, 2019, 8 a.m. 35.0 ppb (32) 8.0 ppb (7) N/A 27.0 ppb (25) N/A N/A N/A 0.35 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
Sept. 21, 2019, 7 a.m. 42.0 ppb (39) 13.0 ppb (12) N/A 30.0 ppb (28) N/A 1.0 ppb (1) N/A 0.46 ppb (5) N/A 8.0 μg/m3 (33) 39.0
 
Sept. 21, 2019, 6 a.m. 49.0 ppb (45) 17.0 ppb (16) N/A 32.0 ppb (30) N/A 1.0 ppb (1) N/A 0.42 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 21, 2019, 5 a.m. 31.0 ppb (29) 3.0 ppb (3) N/A 28.0 ppb (26) N/A 0.0 ppb (0) N/A 0.38 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 21, 2019, 4 a.m. 28.0 ppb (26) 3.0 ppb (3) N/A 25.0 ppb (23) N/A 0.0 ppb (0) N/A 0.39 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 21, 2019, 3 a.m. 27.0 ppb (25) 3.0 ppb (3) N/A 24.0 ppb (22) N/A 1.0 ppb (1) N/A 0.44 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 21, 2019, 2 a.m. 32.0 ppb (30) 6.0 ppb (6) N/A 26.0 ppb (24) N/A 1.0 ppb (1) N/A 0.45 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 21, 2019, 1 a.m. 31.0 ppb (29) 6.0 ppb (6) N/A 25.0 ppb (23) N/A 1.0 ppb (1) N/A 0.43 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 21, 2019, midnight 34.0 ppb (31) 9.0 ppb (8) N/A 25.0 ppb (23) N/A 1.0 ppb (1) N/A 0.44 ppb (5) N/A 7.0 μg/m3 (29) 31.0
 
Sept. 20, 2019, 11 p.m. 28.0 ppb (26) 8.0 ppb (7) N/A 20.0 ppb (19) N/A 1.0 ppb (1) N/A 0.46 ppb (5) N/A 6.0 μg/m3 (25) 26.0
 
Sept. 20, 2019, 10 p.m. 15.0 ppb (14) 4.0 ppb (4) N/A 11.0 ppb (10) N/A 1.0 ppb (1) N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 20, 2019, 9 p.m. 18.0 ppb (17) 7.0 ppb (6) N/A 12.0 ppb (11) N/A 1.0 ppb (1) N/A 0.32 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 20, 2019, 8 p.m. 11.0 ppb (10) 4.0 ppb (4) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 20, 2019, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 0.35 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 20, 2019, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 0.32 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 20, 2019, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 0.27 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 20, 2019, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 0.26 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 20, 2019, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 20, 2019, 2 p.m. 15.0 ppb (14) 6.0 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A 0.28 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 20, 2019, 1 p.m. 38.0 ppb (35) 19.0 ppb (18) N/A 18.0 ppb (17) N/A N/A N/A 0.45 ppb (5) N/A 7.0 μg/m3 (29) 35.0
 
Sept. 20, 2019, noon 107.0 ppb (101) 73.0 ppb (70) N/A 33.0 ppb (31) N/A 1.0 ppb (1) N/A 0.61 ppb (7) N/A 18.0 μg/m3 (63) 101.0
 
Sept. 20, 2019, 11 a.m. 101.0 ppb (100) 66.0 ppb (63) N/A 34.0 ppb (31) N/A 1.0 ppb (1) N/A 0.5 ppb (6) N/A 16.0 μg/m3 (59) 100.0
 
Sept. 20, 2019, 10 a.m. 62.0 ppb (59) 31.0 ppb (29) N/A 31.0 ppb (29) N/A 1.0 ppb (1) N/A 0.38 ppb (4) N/A 11.0 μg/m3 (46) 59.0
 
Sept. 20, 2019, 9 a.m. 60.0 ppb (56) 30.0 ppb (28) N/A 30.0 ppb (28) N/A 1.0 ppb (1) N/A 0.3 ppb (3) N/A 9.0 μg/m3 (38) 56.0
 
Sept. 20, 2019, 8 a.m. 58.0 ppb (54) 27.0 ppb (25) N/A 31.0 ppb (29) N/A 1.0 ppb (1) N/A 0.28 ppb (3) N/A 10.0 μg/m3 (42) 54.0
 
Sept. 20, 2019, 7 a.m. 72.0 ppb (69) 40.0 ppb (37) N/A 32.0 ppb (30) N/A 1.0 ppb (1) N/A 0.29 ppb (3) N/A 13.0 μg/m3 (52) 69.0
 
Sept. 20, 2019, 6 a.m. 72.0 ppb (69) 44.0 ppb (41) N/A 28.0 ppb (26) N/A 1.0 ppb (1) N/A 0.3 ppb (3) N/A 12.0 μg/m3 (50) 69.0
 
Sept. 20, 2019, 5 a.m. 56.0 ppb (52) 29.0 ppb (27) N/A 26.0 ppb (24) N/A 1.0 ppb (1) N/A 0.32 ppb (4) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 20, 2019, 4 a.m. 64.0 ppb (61) 38.0 ppb (35) N/A 26.0 ppb (24) N/A 1.0 ppb (1) N/A 0.4 ppb (4) N/A 13.0 μg/m3 (52) 61.0
 
Sept. 20, 2019, 3 a.m. 64.0 ppb (61) 37.0 ppb (34) N/A 27.0 ppb (25) N/A 1.0 ppb (1) N/A 0.42 ppb (5) N/A 9.0 μg/m3 (38) 61.0
 
Sept. 20, 2019, 2 a.m. 67.0 ppb (64) 38.0 ppb (35) N/A 29.0 ppb (27) N/A 1.0 ppb (1) N/A 0.5 ppb (6) N/A 8.0 μg/m3 (33) 64.0
 
Sept. 20, 2019, 1 a.m. 45.0 ppb (42) 16.0 ppb (15) N/A 28.0 ppb (26) N/A 1.0 ppb (1) N/A 0.41 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 20, 2019, midnight 26.0 ppb (24) 7.0 ppb (6) N/A 19.0 ppb (18) N/A 0.0 ppb (0) N/A 0.37 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2019, 11 p.m. 24.0 ppb (22) 7.0 ppb (6) N/A 17.0 ppb (16) N/A 0.0 ppb (0) N/A 0.42 ppb (5) N/A 5.0 μg/m3 (21) 22.0
 
Sept. 19, 2019, 10 p.m. 17.0 ppb (16) 5.0 ppb (5) N/A 13.0 ppb (12) N/A 0.0 ppb (0) N/A 0.34 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 19, 2019, 9 p.m. 11.0 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.32 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2019, 8 p.m. 14.0 ppb (13) 5.0 ppb (5) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.28 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 19, 2019, 7 p.m. 15.0 ppb (14) 5.0 ppb (5) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2019, 6 p.m. 16.0 ppb (15) 6.0 ppb (6) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 3.0 μg/m3 (12) 15.0
 
Sept. 19, 2019, 5 p.m. 17.0 ppb (16) 8.0 ppb (7) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2019, 4 p.m. 17.0 ppb (16) 9.0 ppb (8) 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
 
Sept. 19, 2019, 3 p.m. 17.0 ppb (16) 9.0 ppb (8) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2019, 2 p.m. 14.0 ppb (13) 6.0 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
Sept. 19, 2019, 1 p.m. 23.0 ppb (21) 11.0 ppb (10) N/A 12.0 ppb (11) N/A 1.0 ppb (1) N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 19, 2019, noon N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 0.63 ppb (7) N/A 13.0 μg/m3 (52) 52.0
 
Sept. 19, 2019, 11 a.m. 81.0 ppb (79) 55.0 ppb (51) N/A 25.0 ppb (23) N/A 1.0 ppb (1) N/A 0.68 ppb (8) N/A 12.0 μg/m3 (50) 79.0
 
Sept. 19, 2019, 10 a.m. 59.0 ppb (55) 37.0 ppb (34) N/A 22.0 ppb (20) N/A 1.0 ppb (1) N/A N/A N/A 7.0 μg/m3 (29) 55.0
 
Sept. 19, 2019, 9 a.m. 30.0 ppb (28) 10.0 ppb (9) N/A 20.0 ppb (19) N/A 0.0 ppb (0) N/A 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2019, 8 a.m. 29.0 ppb (27) 10.0 ppb (9) N/A 19.0 ppb (18) N/A 0.0 ppb (0) N/A 0.21 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.21 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 19, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.27 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 19, 2019, 4 a.m. 17.0 ppb (16) 2.0 ppb (2) N/A 15.0 ppb (14) N/A 0.0 ppb (0) N/A 0.29 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 19, 2019, 3 a.m. 22.0 ppb (20) 4.0 ppb (4) N/A 18.0 ppb (17) N/A 0.0 ppb (0) N/A 0.35 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 19, 2019, 2 a.m. 22.0 ppb (20) 3.0 ppb (3) N/A 19.0 ppb (18) N/A 0.0 ppb (0) N/A 0.34 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 19, 2019, 1 a.m. 22.0 ppb (20) 3.0 ppb (3) N/A 18.0 ppb (17) N/A 0.0 ppb (0) N/A 0.33 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 19, 2019, midnight 25.0 ppb (23) 5.0 ppb (5) N/A 20.0 ppb (19) N/A 0.0 ppb (0) N/A 0.28 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 18, 2019, 11 p.m. 17.0 ppb (16) 4.0 ppb (4) N/A 14.0 ppb (13) N/A 0.0 ppb (0) N/A 0.28 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 18, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.27 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 18, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.26 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 18, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.28 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 18, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.27 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 18, 2019, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A 0.21 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 18, 2019, 4 p.m. 7.0 ppb (6) 4.0 ppb (4) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A N/A 6.0
 
Sept. 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A N/A 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A N/A 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
Sept. 18, 2019, noon 16.0 ppb (15) 9.0 ppb (8) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A 0.32 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 18, 2019, 11 a.m. 15.0 ppb (14) 6.0 ppb (6) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 18, 2019, 10 a.m. 15.0 ppb (14) 4.0 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.24 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 18, 2019, 9 a.m. 10.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.22 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 18, 2019, 8 a.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 18, 2019, 7 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.18 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 18, 2019, 6 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.21 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 18, 2019, 5 a.m. 11.0 ppb (10) 2.0 ppb (2) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 18, 2019, 4 a.m. 22.0 ppb (20) 11.0 ppb (10) N/A 11.0 ppb (10) N/A 1.0 ppb (1) N/A 0.31 ppb (3) N/A N/A 20.0
 
Sept. 18, 2019, 3 a.m. 25.0 ppb (23) 12.0 ppb (11) N/A 13.0 ppb (12) N/A 1.0 ppb (1) N/A 0.4 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 18, 2019, 2 a.m. 14.0 ppb (13) 4.0 ppb (4) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 18, 2019, 1 a.m. 19.0 ppb (18) 7.0 ppb (6) N/A 12.0 ppb (11) N/A 0.0 ppb (0) N/A 0.28 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 18, 2019, midnight 18.0 ppb (17) 6.0 ppb (6) N/A 12.0 ppb (11) N/A 0.0 ppb (0) N/A 0.27 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 17, 2019, 11 p.m. 15.0 ppb (14) 6.0 ppb (6) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 17, 2019, 10 p.m. 14.0 ppb (13) 5.0 ppb (5) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.29 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 17, 2019, 9 p.m. 12.0 ppb (11) 5.0 ppb (5) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.26 ppb (3) N/A 2.0 μg/m3 (8) 11.0
 
Sept. 17, 2019, 8 p.m. 10.0 ppb (9) 5.0 ppb (5) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.26 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 17, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.27 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 17, 2019, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.23 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 17, 2019, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 17, 2019, 4 p.m. 9.0 ppb (8) 5.0 ppb (5) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A N/A N/A 2.0 μg/m3 (8) 8.0
 
Sept. 17, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.19 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 17, 2019, 2 p.m. 7.0 ppb (6) 4.0 ppb (4) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.21 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 17, 2019, 1 p.m. 12.0 ppb (11) 7.0 ppb (6) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.29 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 17, 2019, noon 22.0 ppb (20) 12.0 ppb (11) N/A 10.0 ppb (9) N/A 1.0 ppb (1) N/A 0.43 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 17, 2019, 11 a.m. 31.0 ppb (29) 14.0 ppb (13) N/A 17.0 ppb (16) N/A 1.0 ppb (1) N/A 0.4 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 17, 2019, 10 a.m. 32.0 ppb (30) 10.0 ppb (9) N/A 22.0 ppb (20) N/A 0.0 ppb (0) N/A 0.33 ppb (4) N/A 7.0 μg/m3 (29) 30.0
 
Sept. 17, 2019, 9 a.m. 15.0 ppb (14) 2.0 ppb (2) N/A 13.0 ppb (12) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 17, 2019, 8 a.m. 15.0 ppb (14) 3.0 ppb (3) N/A 11.0 ppb (10) N/A 0.0 ppb (0) N/A 0.21 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 17, 2019, 7 a.m. 28.0 ppb (26) 8.0 ppb (7) N/A 20.0 ppb (19) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 17, 2019, 6 a.m. 25.0 ppb (23) 5.0 ppb (5) N/A 20.0 ppb (19) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 4.0 μg/m3 (17) 23.0
 
Sept. 17, 2019, 5 a.m. 27.0 ppb (25) 7.0 ppb (6) N/A 20.0 ppb (19) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 3.0 μg/m3 (12) 25.0
 
Sept. 17, 2019, 4 a.m. 19.0 ppb (18) 3.0 ppb (3) N/A 16.0 ppb (15) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 17, 2019, 3 a.m. 12.0 ppb (11) 2.0 ppb (2) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 17, 2019, 2 a.m. 15.0 ppb (14) 2.0 ppb (2) N/A 13.0 ppb (12) N/A 0.0 ppb (0) N/A 0.24 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 17, 2019, 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 0.26 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 17, 2019, midnight 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 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2019, 11 p.m. 13.0 ppb (12) 4.0 ppb (4) N/A 10.0 ppb (9) N/A 0.0 ppb (0) N/A 0.27 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
Sept. 16, 2019, 10 p.m. 12.0 ppb (11) 5.0 ppb (5) N/A 8.0 ppb (7) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 16, 2019, 9 p.m. 13.0 ppb (12) 7.0 ppb (6) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.29 ppb (3) N/A 2.0 μg/m3 (8) 12.0
 
Sept. 16, 2019, 8 p.m. 13.0 ppb (12) 7.0 ppb (6) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.29 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
Sept. 16, 2019, 7 p.m. 12.0 ppb (11) 7.0 ppb (6) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.27 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 16, 2019, 6 p.m. 11.0 ppb (10) 6.0 ppb (6) N/A 4.0 ppb (4) N/A 1.0 ppb (1) N/A 0.22 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 16, 2019, 5 p.m. 11.0 ppb (10) 6.0 ppb (6) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.2 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 16, 2019, 4 p.m. 7.0 ppb (6) 4.0 ppb (4) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2019, 3 p.m. 7.0 ppb (6) 4.0 ppb (4) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.2 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 16, 2019, 2 p.m. 10.0 ppb (9) 6.0 ppb (6) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A 0.22 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 16, 2019, 1 p.m. 16.0 ppb (15) 9.0 ppb (8) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.3 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 16, 2019, noon 18.0 ppb (17) 10.0 ppb (9) N/A 9.0 ppb (8) N/A 1.0 ppb (1) N/A 0.35 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 16, 2019, 11 a.m. 20.0 ppb (19) 7.0 ppb (6) N/A 13.0 ppb (12) N/A 0.0 ppb (0) N/A 0.34 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 16, 2019, 10 a.m. 22.0 ppb (20) 6.0 ppb (6) N/A 16.0 ppb (15) N/A 0.0 ppb (0) N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 16, 2019, 9 a.m. 15.0 ppb (14) 3.0 ppb (3) N/A 12.0 ppb (11) N/A 0.0 ppb (0) N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2019, 8 a.m. 10.0 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A 0.0 ppb (0) N/A 0.2 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
Sept. 16, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A 0.19 ppb (2) N/A 4.0 μg/m3 (17) 17.0