ID: 2413

AQSQID: 440070030

Site Name: Near Road

Added: April 21, 2020, 6:24 p.m.

Updated: Sept. 19, 2021, 9:57 p.m.

Location: Providence (Downtown), RI

Reporting: True, Located: True

Current AQI: 25.0

Providence (Downtown) RI, US: 41.829495, -71.417457

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 19, 2021, 8 p.m. 40.0 ppb (38) 25.9 ppb (25) N/A 14.0 ppb (14) N/A N/A N/A 0.68 ppb (8) N/A 0.0 μg/m3 (0) 25.0
 
Sept. 19, 2021, 7 p.m. 28.6 ppb (27) 19.1 ppb (19) N/A 10.0 ppb (10) N/A N/A N/A 0.5 ppb (6) N/A 3.0 μg/m3 (13) 19.0
 
Sept. 19, 2021, 6 p.m. 15.6 ppb (15) 8.5 ppb (9) N/A 7.0 ppb (7) N/A N/A N/A 0.42 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2021, 5 p.m. 18.8 ppb (18) 12.9 ppb (13) N/A 6.0 ppb (6) N/A N/A N/A 0.44 ppb (5) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 19, 2021, 4 p.m. 14.1 ppb (14) 8.0 ppb (8) N/A 6.0 ppb (6) N/A N/A N/A 0.31 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 19, 2021, 3 p.m. 7.7 ppb (8) 5.4 ppb (6) N/A 2.0 ppb (2) N/A N/A N/A 0.25 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 19, 2021, 2 p.m. 9.3 ppb (9) 5.5 ppb (6) N/A 4.0 ppb (4) N/A N/A N/A 0.29 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2021, 1 p.m. 16.0 ppb (16) 11.6 ppb (11) N/A 4.0 ppb (4) N/A N/A N/A 0.37 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2021, noon 14.5 ppb (14) 10.1 ppb (10) N/A 4.0 ppb (4) N/A N/A N/A 0.35 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 19, 2021, 11 a.m. 25.2 ppb (24) 18.8 ppb (18) N/A 6.0 ppb (6) N/A N/A N/A 0.43 ppb (5) N/A 4.0 μg/m3 (17) 18.0
 
Sept. 19, 2021, 10 a.m. 24.9 ppb (24) 17.4 ppb (17) N/A 8.0 ppb (8) N/A N/A N/A 0.45 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 19, 2021, 9 a.m. 14.1 ppb (14) 7.9 ppb (8) N/A 6.0 ppb (6) N/A N/A N/A 0.29 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 19, 2021, 8 a.m. 18.2 ppb (18) 10.4 ppb (10) N/A 8.0 ppb (8) N/A N/A N/A 0.37 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2021, 7 a.m. 18.0 ppb (17) 10.6 ppb (10) N/A 7.0 ppb (7) N/A N/A N/A 0.47 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2021, 6 a.m. 18.3 ppb (18) 9.4 ppb (9) N/A 9.0 ppb (9) N/A N/A N/A 0.64 ppb (7) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 19, 2021, 5 a.m. 19.7 ppb (19) 7.7 ppb (8) N/A 12.0 ppb (12) N/A N/A N/A 0.53 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 19, 2021, 4 a.m. 30.9 ppb (30) 16.2 ppb (16) N/A 15.0 ppb (15) N/A N/A N/A 0.75 ppb (10) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 19, 2021, 3 a.m. 27.3 ppb (26) 13.6 ppb (13) N/A 14.0 ppb (14) N/A N/A N/A 0.64 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 19, 2021, 2 a.m. 36.8 ppb (35) 17.9 ppb (17) N/A 19.0 ppb (18) N/A N/A N/A 0.84 ppb (10) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 19, 2021, 1 a.m. 39.1 ppb (37) 19.0 ppb (18) N/A 20.0 ppb (19) N/A N/A N/A 0.95 ppb (11) N/A 20.0 μg/m3 (68) 68.0
 
Sept. 19, 2021, midnight 34.2 ppb (33) 13.3 ppb (13) N/A 21.0 ppb (20) N/A N/A N/A 0.74 ppb (8) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 18, 2021, 11 p.m. 24.5 ppb (24) 10.8 ppb (11) N/A 14.0 ppb (14) N/A N/A N/A 0.49 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 18, 2021, 10 p.m. 12.7 ppb (12) 5.5 ppb (6) N/A 7.0 ppb (7) N/A N/A N/A 0.41 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 18, 2021, 9 p.m. 8.3 ppb (8) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.31 ppb (4) N/A 2.0 μg/m3 (9) 9.0
 
Sept. 18, 2021, 8 p.m. 7.9 ppb (8) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.33 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 18, 2021, 7 p.m. 20.6 ppb (20) 10.9 ppb (11) N/A 10.0 ppb (10) N/A N/A N/A 0.47 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 18, 2021, 6 p.m. 15.7 ppb (15) 9.1 ppb (9) N/A 7.0 ppb (7) N/A N/A N/A 0.42 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 18, 2021, 5 p.m. 37.5 ppb (36) 24.3 ppb (23) N/A 13.0 ppb (13) N/A N/A N/A 0.67 ppb (8) N/A 4.0 μg/m3 (17) 23.0
 
Sept. 18, 2021, 4 p.m. 36.6 ppb (35) 27.3 ppb (26) N/A 9.0 ppb (9) N/A N/A N/A 0.66 ppb (8) N/A 3.0 μg/m3 (13) 26.0
 
Sept. 18, 2021, 3 p.m. 44.9 ppb (43) 30.1 ppb (29) N/A 15.0 ppb (15) N/A N/A N/A 0.64 ppb (7) N/A 3.0 μg/m3 (13) 29.0
 
Sept. 18, 2021, 2 p.m. 31.7 ppb (30) 20.9 ppb (20) N/A 11.0 ppb (11) N/A N/A N/A 0.46 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 18, 2021, 1 p.m. 32.3 ppb (31) 21.0 ppb (20) N/A 11.0 ppb (11) N/A N/A N/A 0.49 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 18, 2021, noon 40.8 ppb (39) 27.7 ppb (27) N/A 13.0 ppb (13) N/A N/A N/A 0.51 ppb (6) N/A 3.0 μg/m3 (13) 27.0
 
Sept. 18, 2021, 11 a.m. 34.8 ppb (33) 22.9 ppb (22) N/A 12.0 ppb (12) N/A N/A N/A 0.48 ppb (6) N/A 1.0 μg/m3 (5) 22.0
 
Sept. 18, 2021, 10 a.m. 28.3 ppb (27) 15.9 ppb (15) N/A 12.0 ppb (12) N/A N/A N/A 0.42 ppb (5) N/A 1.0 μg/m3 (5) 15.0
 
Sept. 18, 2021, 9 a.m. 23.1 ppb (22) 13.4 ppb (13) N/A 10.0 ppb (10) N/A N/A N/A 0.34 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 18, 2021, 8 a.m. 17.7 ppb (17) 10.9 ppb (11) N/A 7.0 ppb (7) N/A N/A N/A 0.38 ppb (5) N/A 2.0 μg/m3 (9) 11.0
 
Sept. 18, 2021, 7 a.m. 19.3 ppb (19) 12.6 ppb (12) N/A 7.0 ppb (7) N/A N/A N/A 0.39 ppb (5) N/A 1.0 μg/m3 (5) 12.0
 
Sept. 18, 2021, 6 a.m. 17.8 ppb (17) 12.4 ppb (12) N/A 5.0 ppb (5) N/A N/A N/A 0.5 ppb (6) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 18, 2021, 5 a.m. 19.4 ppb (19) 10.4 ppb (10) N/A 9.0 ppb (9) N/A N/A N/A 0.5 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 18, 2021, 4 a.m. 25.8 ppb (25) 15.7 ppb (15) N/A 10.0 ppb (10) N/A N/A N/A 0.53 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 18, 2021, 3 a.m. 32.9 ppb (32) 19.6 ppb (19) N/A 13.0 ppb (13) N/A N/A N/A 0.73 ppb (8) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 18, 2021, 2 a.m. 19.9 ppb (19) 9.8 ppb (10) N/A 10.0 ppb (10) N/A N/A N/A 0.5 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 18, 2021, 1 a.m. 11.2 ppb (11) 3.4 ppb (4) N/A 8.0 ppb (8) N/A N/A N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 18, 2021, midnight 8.2 ppb (8) 3.4 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.29 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 17, 2021, 11 p.m. 15.6 ppb (15) 7.7 ppb (8) N/A 8.0 ppb (8) N/A N/A N/A 0.37 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 17, 2021, 10 p.m. 16.8 ppb (16) 8.1 ppb (8) N/A 9.0 ppb (9) N/A N/A N/A 0.37 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 17, 2021, 9 p.m. 19.4 ppb (19) 9.1 ppb (9) N/A 10.0 ppb (10) N/A N/A N/A 0.41 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 17, 2021, 8 p.m. 15.3 ppb (15) 8.0 ppb (8) N/A 7.0 ppb (7) N/A N/A N/A 0.35 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 17, 2021, 7 p.m. 13.8 ppb (14) 6.8 ppb (7) N/A 7.0 ppb (7) N/A N/A N/A 0.35 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 17, 2021, 6 p.m. 27.8 ppb (27) 15.1 ppb (15) N/A 13.0 ppb (13) N/A N/A N/A 0.4 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 17, 2021, 5 p.m. 19.0 ppb (18) 10.8 ppb (11) N/A 8.0 ppb (8) N/A N/A N/A 0.34 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 17, 2021, 4 p.m. 14.4 ppb (14) 8.9 ppb (9) N/A 6.0 ppb (6) N/A N/A N/A 0.27 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 17, 2021, 3 p.m. 25.8 ppb (25) 16.7 ppb (16) N/A 9.0 ppb (9) N/A N/A N/A 0.29 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 17, 2021, 2 p.m. 12.0 ppb (12) 4.4 ppb (5) N/A 8.0 ppb (8) N/A N/A N/A 0.26 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 17, 2021, 1 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
 
Sept. 17, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Sept. 17, 2021, 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
 
Sept. 17, 2021, 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
 
Sept. 17, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 17, 2021, 8 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
 
Sept. 17, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Sept. 17, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Sept. 17, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Sept. 17, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 5.0
 
Sept. 17, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Sept. 17, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Sept. 17, 2021, 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 (13) 13.0
 
Sept. 17, 2021, midnight N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 16, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
Sept. 16, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Sept. 16, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Sept. 16, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
Sept. 16, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (13) 13.0
 
Sept. 16, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Sept. 16, 2021, 5 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
 
Sept. 16, 2021, 4 p.m. 14.0 ppb (14) 5.8 ppb (6) N/A 8.0 ppb (8) N/A N/A N/A 0.28 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2021, 3 p.m. 13.9 ppb (14) 5.0 ppb (5) N/A 9.0 ppb (9) N/A N/A N/A 0.26 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 16, 2021, 2 p.m. 24.7 ppb (24) 12.0 ppb (12) N/A 13.0 ppb (13) N/A N/A N/A 0.33 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 16, 2021, 1 p.m. 46.4 ppb (44) 26.0 ppb (25) N/A 20.0 ppb (19) N/A N/A N/A 0.46 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2021, noon 37.9 ppb (36) 22.3 ppb (22) N/A 16.0 ppb (16) N/A N/A N/A 0.37 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 16, 2021, 11 a.m. 38.4 ppb (37) 21.0 ppb (20) N/A 17.0 ppb (17) N/A N/A N/A 0.39 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 16, 2021, 10 a.m. 46.6 ppb (44) 28.8 ppb (28) N/A 18.0 ppb (17) N/A N/A N/A 0.46 ppb (6) N/A 6.0 μg/m3 (25) 28.0
 
Sept. 16, 2021, 9 a.m. 43.0 ppb (41) 27.4 ppb (26) N/A 16.0 ppb (16) N/A N/A N/A 0.48 ppb (6) N/A 5.0 μg/m3 (21) 26.0
 
Sept. 16, 2021, 8 a.m. 35.2 ppb (34) 24.9 ppb (24) N/A 10.0 ppb (10) N/A N/A N/A 0.34 ppb (4) N/A 5.0 μg/m3 (21) 24.0
 
Sept. 16, 2021, 7 a.m. 43.2 ppb (41) 24.7 ppb (24) N/A 19.0 ppb (18) N/A N/A N/A 0.36 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2021, 6 a.m. 35.0 ppb (34) 22.8 ppb (22) N/A 12.0 ppb (12) N/A N/A N/A 0.3 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 16, 2021, 5 a.m. 41.4 ppb (40) 23.3 ppb (22) N/A 18.0 ppb (17) N/A N/A N/A 0.42 ppb (5) N/A 5.0 μg/m3 (21) 22.0
 
Sept. 16, 2021, 4 a.m. 24.6 ppb (24) 13.1 ppb (13) N/A 12.0 ppb (12) N/A N/A N/A 0.39 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 16, 2021, 3 a.m. 30.4 ppb (29) 17.0 ppb (17) N/A 13.0 ppb (13) N/A N/A N/A 0.42 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2021, 2 a.m. 27.3 ppb (26) 15.7 ppb (15) N/A 12.0 ppb (12) N/A N/A N/A 0.44 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 16, 2021, 1 a.m. 20.0 ppb (19) 9.8 ppb (10) N/A 10.0 ppb (10) N/A N/A N/A 0.43 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 16, 2021, midnight 25.0 ppb (24) 12.0 ppb (12) N/A 13.0 ppb (13) N/A N/A N/A 0.53 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 15, 2021, 11 p.m. 26.4 ppb (25) 12.0 ppb (12) N/A 14.0 ppb (14) N/A N/A N/A 0.59 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 15, 2021, 10 p.m. 22.3 ppb (22) 12.5 ppb (12) N/A 10.0 ppb (10) N/A N/A N/A 0.54 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 15, 2021, 9 p.m. 23.6 ppb (23) 11.0 ppb (11) N/A 13.0 ppb (13) N/A N/A N/A 0.5 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 15, 2021, 8 p.m. 25.1 ppb (24) 12.9 ppb (13) N/A 12.0 ppb (12) N/A N/A N/A 0.54 ppb (6) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 15, 2021, 7 p.m. 28.3 ppb (27) 15.9 ppb (15) N/A 12.0 ppb (12) N/A N/A N/A 0.55 ppb (7) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 15, 2021, 6 p.m. 29.7 ppb (29) 15.8 ppb (15) N/A 14.0 ppb (14) N/A N/A N/A 0.51 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 15, 2021, 5 p.m. 25.7 ppb (25) 13.3 ppb (13) N/A 12.0 ppb (12) N/A N/A N/A 0.5 ppb (6) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 15, 2021, 4 p.m. 24.8 ppb (24) 14.3 ppb (14) N/A 11.0 ppb (11) N/A N/A N/A 0.51 ppb (6) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 15, 2021, 3 p.m. 25.2 ppb (24) 13.3 ppb (13) N/A 12.0 ppb (12) N/A N/A N/A 0.48 ppb (6) N/A 17.0 μg/m3 (62) 62.0
 
Sept. 15, 2021, 2 p.m. 31.9 ppb (31) 17.5 ppb (17) N/A 14.0 ppb (14) N/A N/A N/A 0.57 ppb (7) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 15, 2021, 1 p.m. 34.9 ppb (33) 18.0 ppb (17) N/A 17.0 ppb (17) N/A N/A N/A 0.56 ppb (7) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 15, 2021, noon 35.1 ppb (34) 16.5 ppb (16) N/A 19.0 ppb (18) N/A N/A N/A 0.63 ppb (7) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 15, 2021, 11 a.m. 34.5 ppb (33) 15.2 ppb (15) N/A 19.0 ppb (18) N/A N/A N/A 0.49 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 15, 2021, 10 a.m. 29.3 ppb (28) 12.9 ppb (13) N/A 16.0 ppb (16) N/A N/A N/A 0.47 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 15, 2021, 9 a.m. 25.0 ppb (24) 12.3 ppb (12) N/A 13.0 ppb (13) N/A N/A N/A 0.41 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 15, 2021, 8 a.m. 18.4 ppb (18) 7.5 ppb (8) N/A 11.0 ppb (11) N/A N/A N/A 0.3 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 15, 2021, 7 a.m. 15.4 ppb (15) 5.8 ppb (6) N/A 10.0 ppb (10) N/A N/A N/A 0.29 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 15, 2021, 6 a.m. 15.5 ppb (15) 6.0 ppb (6) N/A 10.0 ppb (10) N/A N/A N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 15, 2021, 5 a.m. 18.0 ppb (17) 6.7 ppb (7) N/A 11.0 ppb (11) N/A N/A N/A 0.31 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 15, 2021, 4 a.m. 20.6 ppb (20) 11.6 ppb (11) N/A 9.0 ppb (9) N/A N/A N/A 0.29 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Sept. 15, 2021, 3 a.m. 20.3 ppb (20) 9.2 ppb (9) N/A 11.0 ppb (11) N/A N/A N/A 0.43 ppb (5) N/A 3.0 μg/m3 (13) 13.0
 
Sept. 15, 2021, 2 a.m. 19.3 ppb (19) 6.8 ppb (7) N/A 13.0 ppb (13) N/A N/A N/A 0.47 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 15, 2021, 1 a.m. 19.4 ppb (19) 7.8 ppb (8) N/A 12.0 ppb (12) N/A N/A N/A 0.46 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 15, 2021, midnight 25.1 ppb (24) 11.6 ppb (11) N/A 14.0 ppb (14) N/A N/A N/A 0.56 ppb (7) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 14, 2021, 11 p.m. 25.1 ppb (24) 13.8 ppb (14) N/A 11.0 ppb (11) N/A N/A N/A 0.57 ppb (7) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 14, 2021, 10 p.m. 31.9 ppb (31) 18.0 ppb (17) N/A 14.0 ppb (14) N/A N/A N/A 0.55 ppb (7) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 14, 2021, 9 p.m. 29.5 ppb (28) 18.1 ppb (18) N/A 11.0 ppb (11) N/A N/A N/A 0.53 ppb (6) N/A 4.0 μg/m3 (17) 18.0
 
Sept. 14, 2021, 8 p.m. 35.7 ppb (34) 17.7 ppb (17) N/A 18.0 ppb (17) N/A N/A N/A 0.52 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 14, 2021, 7 p.m. 31.5 ppb (30) 17.5 ppb (17) N/A 14.0 ppb (14) N/A N/A N/A 0.53 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 14, 2021, 6 p.m. 30.4 ppb (29) 19.3 ppb (19) N/A 11.0 ppb (11) N/A N/A N/A 0.53 ppb (6) N/A 3.0 μg/m3 (13) 19.0
 
Sept. 14, 2021, 5 p.m. 22.5 ppb (22) 14.0 ppb (14) N/A 9.0 ppb (9) N/A N/A N/A 0.37 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 14, 2021, 4 p.m. 24.0 ppb (23) 13.2 ppb (13) N/A 11.0 ppb (11) N/A N/A N/A 0.39 ppb (5) N/A 2.0 μg/m3 (9) 13.0
 
Sept. 14, 2021, 3 p.m. 24.1 ppb (23) 14.5 ppb (14) N/A 10.0 ppb (10) N/A N/A N/A 0.37 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
Sept. 14, 2021, 2 p.m. 32.3 ppb (31) 18.3 ppb (18) N/A 14.0 ppb (14) N/A N/A N/A 0.4 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 14, 2021, 1 p.m. 52.8 ppb (50) 33.2 ppb (32) N/A 20.0 ppb (19) N/A N/A N/A 0.51 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 14, 2021, noon 24.3 ppb (23) 15.8 ppb (15) N/A 9.0 ppb (9) N/A N/A N/A 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 14, 2021, 11 a.m. 55.6 ppb (53) 40.5 ppb (39) N/A 15.0 ppb (15) N/A N/A N/A 0.63 ppb (7) N/A 8.0 μg/m3 (34) 39.0
 
Sept. 14, 2021, 10 a.m. 82.2 ppb (82) 65.4 ppb (64) N/A 17.0 ppb (17) N/A N/A N/A 0.82 ppb (10) N/A 7.0 μg/m3 (30) 64.0
 
Sept. 14, 2021, 9 a.m. 64.1 ppb (62) 46.9 ppb (45) N/A 17.0 ppb (17) N/A N/A N/A 0.64 ppb (7) N/A 8.0 μg/m3 (34) 45.0
 
Sept. 14, 2021, 8 a.m. 57.4 ppb (55) 40.7 ppb (39) N/A 17.0 ppb (17) N/A N/A N/A 0.42 ppb (5) N/A 5.0 μg/m3 (21) 39.0
 
Sept. 14, 2021, 7 a.m. 59.0 ppb (57) 37.1 ppb (35) N/A 22.0 ppb (21) N/A N/A N/A 0.33 ppb (4) N/A 5.0 μg/m3 (21) 35.0
 
Sept. 14, 2021, 6 a.m. 44.0 ppb (42) 26.7 ppb (26) N/A 17.0 ppb (17) N/A N/A N/A 0.35 ppb (4) N/A 2.0 μg/m3 (9) 26.0
 
Sept. 14, 2021, 5 a.m. 36.0 ppb (34) 19.4 ppb (19) N/A 17.0 ppb (17) N/A N/A N/A 0.39 ppb (5) N/A 3.0 μg/m3 (13) 19.0
 
Sept. 14, 2021, 4 a.m. 24.8 ppb (24) 13.0 ppb (13) N/A 12.0 ppb (12) N/A N/A N/A 0.43 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 14, 2021, 3 a.m. 43.1 ppb (41) 28.6 ppb (27) N/A 14.0 ppb (14) N/A N/A N/A 0.5 ppb (6) N/A 6.0 μg/m3 (25) 27.0
 
Sept. 14, 2021, 2 a.m. 31.5 ppb (30) 15.5 ppb (15) N/A 16.0 ppb (16) N/A N/A N/A 0.45 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 14, 2021, 1 a.m. 38.7 ppb (37) 19.9 ppb (19) N/A 19.0 ppb (18) N/A N/A N/A 0.66 ppb (8) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 14, 2021, midnight 47.9 ppb (46) 26.9 ppb (26) N/A 21.0 ppb (20) N/A N/A N/A 0.67 ppb (8) N/A 6.0 μg/m3 (25) 26.0
 
Sept. 13, 2021, 11 p.m. 42.2 ppb (40) 22.0 ppb (21) N/A 20.0 ppb (19) N/A N/A N/A 0.72 ppb (8) N/A 5.0 μg/m3 (21) 21.0
 
Sept. 13, 2021, 10 p.m. 48.6 ppb (46) 26.7 ppb (26) N/A 22.0 ppb (21) N/A N/A N/A 0.76 ppb (10) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 13, 2021, 9 p.m. 46.0 ppb (44) 30.6 ppb (29) N/A 15.0 ppb (15) N/A N/A N/A 0.65 ppb (8) N/A 5.0 μg/m3 (21) 29.0
 
Sept. 13, 2021, 8 p.m. 47.3 ppb (45) 28.9 ppb (28) N/A 19.0 ppb (18) N/A N/A N/A 0.63 ppb (7) N/A 3.0 μg/m3 (13) 28.0
 
Sept. 13, 2021, 7 p.m. 43.4 ppb (41) 24.5 ppb (24) N/A 19.0 ppb (18) N/A N/A N/A 0.59 ppb (7) N/A 2.0 μg/m3 (9) 24.0
 
Sept. 13, 2021, 6 p.m. 46.8 ppb (45) 27.8 ppb (27) N/A 19.0 ppb (18) N/A N/A N/A 0.53 ppb (6) N/A 5.0 μg/m3 (21) 27.0
 
Sept. 13, 2021, 5 p.m. 49.1 ppb (47) 33.9 ppb (32) N/A 15.0 ppb (15) N/A N/A N/A 0.54 ppb (6) N/A 6.0 μg/m3 (25) 32.0
 
Sept. 13, 2021, 4 p.m. 47.6 ppb (45) 27.5 ppb (26) N/A 20.0 ppb (19) N/A N/A N/A 0.54 ppb (6) N/A 4.0 μg/m3 (17) 26.0
 
Sept. 13, 2021, 3 p.m. 41.7 ppb (40) 24.1 ppb (23) N/A 18.0 ppb (17) N/A N/A N/A 0.46 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
Sept. 13, 2021, 2 p.m. 44.3 ppb (42) 28.8 ppb (28) N/A 15.0 ppb (15) N/A N/A N/A 0.51 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
Sept. 13, 2021, 1 p.m. 59.7 ppb (58) 37.7 ppb (36) N/A 22.0 ppb (21) N/A N/A N/A 0.66 ppb (8) N/A 17.0 μg/m3 (62) 62.0
 
Sept. 13, 2021, noon 71.7 ppb (70) 49.9 ppb (48) N/A 22.0 ppb (21) N/A N/A N/A 0.79 ppb (10) N/A 18.0 μg/m3 (64) 64.0
 
Sept. 13, 2021, 11 a.m. 77.5 ppb (77) 51.7 ppb (49) N/A 26.0 ppb (25) N/A N/A N/A 0.94 ppb (11) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 13, 2021, 10 a.m. 79.8 ppb (79) 52.2 ppb (50) N/A 28.0 ppb (27) N/A N/A N/A 0.87 ppb (11) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 13, 2021, 9 a.m. 51.7 ppb (49) 28.9 ppb (28) N/A 23.0 ppb (22) N/A N/A N/A 0.66 ppb (8) N/A 14.0 μg/m3 (55) 55.0
 
Sept. 13, 2021, 8 a.m. 38.7 ppb (37) 20.9 ppb (20) N/A 18.0 ppb (17) N/A N/A N/A 0.48 ppb (6) N/A 15.0 μg/m3 (58) 58.0
 
Sept. 13, 2021, 7 a.m. 28.3 ppb (27) 12.9 ppb (13) N/A 15.0 ppb (15) N/A N/A N/A 0.41 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 13, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (53) 53.0
 
Sept. 13, 2021, 5 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
 
Sept. 13, 2021, 4 a.m. 23.1 ppb (22) 8.9 ppb (9) N/A 14.0 ppb (14) N/A N/A N/A 0.3 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Sept. 13, 2021, 3 a.m. 24.1 ppb (23) 9.5 ppb (9) N/A 15.0 ppb (15) N/A N/A N/A 0.51 ppb (6) N/A 13.0 μg/m3 (53) 53.0
 
Sept. 13, 2021, 2 a.m. 29.5 ppb (28) 12.0 ppb (12) N/A 18.0 ppb (17) N/A N/A N/A 0.57 ppb (7) N/A 16.0 μg/m3 (60) 60.0
 
Sept. 13, 2021, 1 a.m. 39.8 ppb (38) 17.4 ppb (17) N/A 22.0 ppb (21) N/A N/A N/A 0.8 ppb (10) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 13, 2021, midnight 35.0 ppb (34) 13.6 ppb (13) N/A 21.0 ppb (20) N/A N/A N/A 0.75 ppb (10) N/A 12.0 μg/m3 (50) 50.0
 
Sept. 12, 2021, 11 p.m. 29.4 ppb (28) 12.3 ppb (12) N/A 17.0 ppb (17) N/A N/A N/A 0.74 ppb (8) N/A 11.0 μg/m3 (46) 46.0
 
Sept. 12, 2021, 10 p.m. 24.3 ppb (23) 9.4 ppb (9) N/A 15.0 ppb (15) N/A N/A N/A 0.7 ppb (8) N/A 8.0 μg/m3 (34) 34.0
 
Sept. 12, 2021, 9 p.m. 18.2 ppb (18) 8.5 ppb (9) N/A 10.0 ppb (10) N/A N/A N/A 0.57 ppb (7) N/A 6.0 μg/m3 (25) 25.0