ID: 2413

AQSQID: 440070030

Site Name: Near Road

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

Updated: June 15, 2021, 11:50 a.m.

Location: Providence (Downtown), RI

Reporting: True, Located: True

Current AQI: 50.0

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
June 15, 2021, 10 a.m. 77.9 ppb (77) 52.7 ppb (50) N/A 25.0 ppb (24) N/A N/A N/A 0.68 ppb (8) N/A 11.0 μg/m3 (46) 50.0
 
June 15, 2021, 9 a.m. 73.9 ppb (73) 53.0 ppb (50) N/A 21.0 ppb (20) N/A N/A N/A 0.59 ppb (7) N/A 4.0 μg/m3 (17) 50.0
 
June 15, 2021, 8 a.m. 61.4 ppb (59) 38.2 ppb (37) N/A 23.0 ppb (22) N/A N/A N/A 0.39 ppb (5) N/A 3.0 μg/m3 (13) 37.0
 
June 15, 2021, 7 a.m. 48.9 ppb (47) 29.1 ppb (28) N/A 20.0 ppb (19) N/A N/A N/A 0.36 ppb (5) N/A 4.0 μg/m3 (17) 28.0
 
June 15, 2021, 6 a.m. 23.7 ppb (23) 13.3 ppb (13) N/A 11.0 ppb (11) N/A N/A N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
June 15, 2021, 5 a.m. 28.5 ppb (27) 15.7 ppb (15) N/A 13.0 ppb (13) N/A N/A N/A 0.43 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
June 15, 2021, 4 a.m. 26.9 ppb (26) 13.4 ppb (13) N/A 14.0 ppb (14) N/A N/A N/A 0.41 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
June 15, 2021, 3 a.m. 29.1 ppb (28) 14.5 ppb (14) N/A 15.0 ppb (15) N/A N/A N/A 0.4 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
June 15, 2021, 2 a.m. 36.4 ppb (35) 21.5 ppb (21) N/A 15.0 ppb (15) N/A N/A N/A 0.51 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
June 15, 2021, 1 a.m. 33.0 ppb (32) 18.0 ppb (17) N/A 15.0 ppb (15) N/A N/A N/A 0.5 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
June 15, 2021, midnight 33.3 ppb (32) 16.9 ppb (16) N/A 16.0 ppb (16) N/A N/A N/A 0.55 ppb (7) N/A 7.0 μg/m3 (30) 30.0
 
June 14, 2021, 11 p.m. 35.3 ppb (34) 19.4 ppb (19) N/A 16.0 ppb (16) N/A N/A N/A 0.55 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
June 14, 2021, 10 p.m. 38.7 ppb (37) 21.7 ppb (21) N/A 17.0 ppb (17) N/A N/A N/A 0.57 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
June 14, 2021, 9 p.m. 46.2 ppb (44) 22.6 ppb (22) N/A 24.0 ppb (23) N/A N/A N/A 0.69 ppb (8) N/A 7.0 μg/m3 (30) 30.0
 
June 14, 2021, 8 p.m. 67.1 ppb (65) 38.5 ppb (37) N/A 29.0 ppb (28) N/A N/A N/A 0.85 ppb (10) N/A 7.0 μg/m3 (30) 37.0
 
June 14, 2021, 7 p.m. 52.4 ppb (50) 26.9 ppb (26) N/A 25.0 ppb (24) N/A N/A N/A 0.59 ppb (7) N/A 8.0 μg/m3 (34) 34.0
 
June 14, 2021, 6 p.m. 57.1 ppb (55) 30.4 ppb (29) N/A 27.0 ppb (26) N/A N/A N/A 0.57 ppb (7) N/A 8.0 μg/m3 (34) 34.0
 
June 14, 2021, 5 p.m. 69.9 ppb (68) 42.8 ppb (41) N/A 27.0 ppb (26) N/A N/A N/A 0.62 ppb (7) N/A 5.0 μg/m3 (21) 41.0
 
June 14, 2021, 4 p.m. 66.1 ppb (64) 38.4 ppb (37) N/A 28.0 ppb (27) N/A N/A N/A 0.61 ppb (7) N/A 5.0 μg/m3 (21) 37.0
 
June 14, 2021, 3 p.m. 61.5 ppb (59) 36.7 ppb (35) N/A 25.0 ppb (24) N/A N/A N/A 0.54 ppb (6) N/A 5.0 μg/m3 (21) 35.0
 
June 14, 2021, 2 p.m. 50.9 ppb (49) 31.7 ppb (30) N/A 19.0 ppb (18) N/A N/A N/A 0.44 ppb (5) N/A 6.0 μg/m3 (25) 30.0
 
June 14, 2021, 1 p.m. 68.5 ppb (67) 41.5 ppb (40) N/A 27.0 ppb (26) N/A N/A N/A 0.53 ppb (6) N/A 6.0 μg/m3 (25) 40.0
 
June 14, 2021, noon 45.1 ppb (43) 30.7 ppb (29) N/A 14.0 ppb (14) N/A N/A N/A 0.41 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
June 14, 2021, 11 a.m. 50.1 ppb (48) 32.1 ppb (31) N/A 18.0 ppb (17) N/A N/A N/A 0.44 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
June 14, 2021, 10 a.m. 80.0 ppb (79) 51.0 ppb (49) N/A 29.0 ppb (28) N/A N/A N/A 0.64 ppb (7) N/A 7.0 μg/m3 (30) 49.0
 
June 14, 2021, 9 a.m. 59.1 ppb (57) 40.3 ppb (39) N/A 19.0 ppb (18) N/A N/A N/A 0.52 ppb (6) N/A 8.0 μg/m3 (34) 39.0
 
June 14, 2021, 8 a.m. 56.7 ppb (54) 35.3 ppb (34) N/A 21.0 ppb (20) N/A N/A N/A 0.37 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
June 14, 2021, 7 a.m. 39.1 ppb (37) 17.9 ppb (17) N/A 21.0 ppb (20) N/A N/A N/A 0.31 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
June 14, 2021, 6 a.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
 
June 14, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (34) 34.0
 
June 14, 2021, 4 a.m. 22.3 ppb (22) 11.8 ppb (12) N/A 11.0 ppb (11) N/A N/A N/A 0.41 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
June 14, 2021, 3 a.m. 27.0 ppb (26) 13.8 ppb (14) N/A 13.0 ppb (13) N/A N/A N/A 0.51 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
June 14, 2021, 2 a.m. 32.6 ppb (31) 17.1 ppb (17) N/A 15.0 ppb (15) N/A N/A N/A 0.53 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
June 14, 2021, 1 a.m. 24.4 ppb (24) 10.0 ppb (10) N/A 14.0 ppb (14) N/A N/A N/A 0.5 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
June 14, 2021, midnight 24.2 ppb (23) 9.9 ppb (10) N/A 14.0 ppb (14) N/A N/A N/A 0.53 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
June 13, 2021, 11 p.m. 24.0 ppb (23) 11.3 ppb (11) N/A 13.0 ppb (13) N/A N/A N/A 0.52 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
June 13, 2021, 10 p.m. 26.3 ppb (25) 12.1 ppb (12) N/A 14.0 ppb (14) N/A N/A N/A 0.46 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
June 13, 2021, 9 p.m. 26.1 ppb (25) 12.8 ppb (13) N/A 13.0 ppb (13) N/A N/A N/A 0.46 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
June 13, 2021, 8 p.m. 21.6 ppb (21) 9.5 ppb (9) N/A 12.0 ppb (12) N/A N/A N/A 0.43 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
June 13, 2021, 7 p.m. 27.6 ppb (27) 15.4 ppb (15) N/A 12.0 ppb (12) N/A N/A N/A 0.51 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
June 13, 2021, 6 p.m. 29.3 ppb (28) 17.3 ppb (17) N/A 12.0 ppb (12) N/A N/A N/A 0.6 ppb (7) N/A 6.0 μg/m3 (25) 25.0
 
June 13, 2021, 5 p.m. 29.9 ppb (29) 16.7 ppb (16) N/A 13.0 ppb (13) N/A N/A N/A 0.57 ppb (7) N/A 7.0 μg/m3 (30) 30.0
 
June 13, 2021, 4 p.m. 26.3 ppb (25) 14.9 ppb (15) N/A 11.0 ppb (11) N/A N/A N/A 0.51 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
June 13, 2021, 3 p.m. 23.6 ppb (23) 11.8 ppb (12) 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
 
June 13, 2021, 2 p.m. 23.0 ppb (22) 12.6 ppb (12) N/A 10.0 ppb (10) N/A N/A N/A 0.43 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
June 13, 2021, 1 p.m. 16.2 ppb (16) 8.6 ppb (9) N/A 8.0 ppb (8) N/A N/A N/A 0.36 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
June 13, 2021, noon 21.2 ppb (20) 10.7 ppb (11) N/A 11.0 ppb (11) N/A N/A N/A 0.42 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
June 13, 2021, 11 a.m. 25.0 ppb (24) 14.2 ppb (14) N/A 11.0 ppb (11) N/A N/A N/A 0.42 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
June 13, 2021, 10 a.m. 22.4 ppb (22) 10.9 ppb (11) N/A 12.0 ppb (12) N/A N/A N/A 0.54 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
June 13, 2021, 9 a.m. 25.4 ppb (24) 12.3 ppb (12) N/A 13.0 ppb (13) N/A N/A N/A 0.46 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
June 13, 2021, 8 a.m. 20.5 ppb (20) 11.6 ppb (11) N/A 9.0 ppb (9) N/A N/A N/A 0.38 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
June 13, 2021, 7 a.m. 17.7 ppb (17) 8.2 ppb (8) N/A 10.0 ppb (10) N/A N/A N/A 0.48 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
June 13, 2021, 6 a.m. 27.0 ppb (26) 14.1 ppb (14) N/A 13.0 ppb (13) N/A N/A N/A 0.71 ppb (8) N/A 11.0 μg/m3 (46) 46.0
 
June 13, 2021, 5 a.m. 31.2 ppb (30) 16.3 ppb (16) N/A 15.0 ppb (15) N/A N/A N/A 0.81 ppb (10) N/A 12.0 μg/m3 (50) 50.0
 
June 13, 2021, 4 a.m. 31.8 ppb (30) 16.8 ppb (16) N/A 15.0 ppb (15) N/A N/A N/A 0.87 ppb (11) N/A 11.0 μg/m3 (46) 46.0
 
June 13, 2021, 3 a.m. 31.9 ppb (31) 16.6 ppb (16) N/A 15.0 ppb (15) N/A N/A N/A 0.68 ppb (8) N/A 12.0 μg/m3 (50) 50.0
 
June 13, 2021, 2 a.m. 32.5 ppb (31) 18.4 ppb (18) N/A 14.0 ppb (14) N/A N/A N/A 0.7 ppb (8) N/A 10.0 μg/m3 (42) 42.0
 
June 13, 2021, 1 a.m. 32.5 ppb (31) 18.0 ppb (17) N/A 15.0 ppb (15) N/A N/A N/A 0.64 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
June 13, 2021, midnight 32.9 ppb (32) 17.4 ppb (17) N/A 16.0 ppb (16) N/A N/A N/A 0.77 ppb (10) N/A 9.0 μg/m3 (38) 38.0
 
June 12, 2021, 11 p.m. 29.2 ppb (28) 14.3 ppb (14) N/A 15.0 ppb (15) N/A N/A N/A 0.6 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
June 12, 2021, 10 p.m. 16.7 ppb (16) 7.5 ppb (8) N/A 9.0 ppb (9) N/A N/A N/A 0.43 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
June 12, 2021, 9 p.m. 21.0 ppb (20) 11.8 ppb (12) N/A 9.0 ppb (9) N/A N/A N/A 0.46 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
June 12, 2021, 8 p.m. 23.3 ppb (22) 10.7 ppb (11) N/A 13.0 ppb (13) N/A N/A N/A 0.4 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
June 12, 2021, 7 p.m. 33.8 ppb (32) 19.7 ppb (19) N/A 14.0 ppb (14) N/A N/A N/A 0.6 ppb (7) N/A 5.0 μg/m3 (21) 21.0
 
June 12, 2021, 6 p.m. 30.9 ppb (30) 20.0 ppb (19) N/A 11.0 ppb (11) N/A N/A N/A 0.64 ppb (7) N/A 5.0 μg/m3 (21) 21.0
 
June 12, 2021, 5 p.m. 15.1 ppb (15) 8.3 ppb (8) N/A 7.0 ppb (7) N/A N/A N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
June 12, 2021, 4 p.m. 20.8 ppb (20) 11.8 ppb (12) N/A 9.0 ppb (9) N/A N/A N/A 0.33 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
June 12, 2021, 3 p.m. 19.9 ppb (19) 12.4 ppb (12) N/A 8.0 ppb (8) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
June 12, 2021, 2 p.m. 40.5 ppb (39) 22.0 ppb (21) N/A 18.0 ppb (17) N/A N/A N/A 0.5 ppb (6) N/A 3.0 μg/m3 (13) 21.0
 
June 12, 2021, 1 p.m. 17.2 ppb (17) 9.3 ppb (9) N/A 8.0 ppb (8) N/A N/A N/A 0.26 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
June 12, 2021, noon 19.8 ppb (19) 9.8 ppb (10) N/A 10.0 ppb (10) N/A N/A N/A 0.29 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
June 12, 2021, 11 a.m. 34.7 ppb (33) 21.7 ppb (21) N/A 13.0 ppb (13) N/A N/A N/A 0.35 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
June 12, 2021, 10 a.m. 9.8 ppb (10) 3.6 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.19 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
June 12, 2021, 9 a.m. 10.8 ppb (11) 4.4 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.18 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
June 12, 2021, 8 a.m. 10.4 ppb (10) 4.7 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.19 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
June 12, 2021, 7 a.m. 8.4 ppb (8) 4.5 ppb (5) N/A 4.0 ppb (4) N/A N/A N/A 0.18 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
June 12, 2021, 6 a.m. 9.4 ppb (9) 4.0 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.18 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
June 12, 2021, 5 a.m. 5.8 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A N/A 0.16 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
June 12, 2021, 4 a.m. 12.8 ppb (13) 4.8 ppb (5) N/A 8.0 ppb (8) N/A N/A N/A 0.27 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
June 12, 2021, 3 a.m. 23.2 ppb (22) 12.7 ppb (12) N/A 11.0 ppb (11) N/A N/A N/A 0.49 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
June 12, 2021, 2 a.m. 23.4 ppb (23) 11.9 ppb (12) N/A 12.0 ppb (12) N/A N/A N/A 0.42 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
June 12, 2021, 1 a.m. 26.2 ppb (25) 13.6 ppb (13) N/A 13.0 ppb (13) N/A N/A N/A 0.44 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
June 12, 2021, midnight 29.3 ppb (28) 19.1 ppb (19) N/A 10.0 ppb (10) N/A N/A N/A 0.48 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
June 11, 2021, 11 p.m. 22.5 ppb (22) 12.5 ppb (12) N/A 10.0 ppb (10) N/A N/A N/A 0.44 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
June 11, 2021, 10 p.m. 29.6 ppb (28) 16.1 ppb (16) N/A 14.0 ppb (14) N/A N/A N/A 0.46 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
June 11, 2021, 9 p.m. 35.7 ppb (34) 21.6 ppb (21) N/A 14.0 ppb (14) N/A N/A N/A 0.53 ppb (6) N/A 4.0 μg/m3 (17) 21.0
 
June 11, 2021, 8 p.m. 34.5 ppb (33) 23.8 ppb (23) N/A 11.0 ppb (11) N/A N/A N/A 0.45 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
June 11, 2021, 7 p.m. 35.8 ppb (34) 22.7 ppb (22) N/A 13.0 ppb (13) N/A N/A N/A 0.47 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
June 11, 2021, 6 p.m. 33.2 ppb (32) 20.9 ppb (20) N/A 12.0 ppb (12) N/A N/A N/A 0.38 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
June 11, 2021, 5 p.m. 25.9 ppb (25) 12.0 ppb (12) N/A 14.0 ppb (14) N/A N/A N/A 0.27 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
June 11, 2021, 4 p.m. 15.8 ppb (15) 7.7 ppb (8) N/A 8.0 ppb (8) N/A N/A N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
June 11, 2021, 3 p.m. 43.7 ppb (42) 25.2 ppb (24) N/A 19.0 ppb (18) N/A N/A N/A 0.4 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
June 11, 2021, 2 p.m. 49.3 ppb (47) 36.0 ppb (34) N/A 13.0 ppb (13) N/A N/A N/A 0.42 ppb (5) N/A 7.0 μg/m3 (30) 34.0
 
June 11, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (30) 30.0
 
June 11, 2021, noon N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (34) 34.0
 
June 11, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (30) 30.0
 
June 11, 2021, 10 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
 
June 11, 2021, 9 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
 
June 11, 2021, 8 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
 
June 11, 2021, 7 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
 
June 11, 2021, 6 a.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
 
June 11, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (30) 30.0
 
June 11, 2021, 4 a.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
 
June 11, 2021, 3 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
 
June 11, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (55) 55.0
 
June 11, 2021, 1 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
 
June 11, 2021, midnight 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
 
June 10, 2021, 11 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
 
June 10, 2021, 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
 
June 10, 2021, 9 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
 
June 10, 2021, 8 p.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
 
June 10, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
June 10, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -2.0 μg/m3 (0) 0.0
June 10, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A 0.25 ppb (3) N/A N/A 3.0
 
June 10, 2021, 4 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
 
June 10, 2021, 3 p.m. 8.8 ppb (9) 6.5 ppb (7) N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
June 10, 2021, 2 p.m. 9.3 ppb (9) 5.6 ppb (6) N/A 4.0 ppb (4) N/A N/A N/A 0.16 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
June 10, 2021, 1 p.m. 11.2 ppb (11) 7.3 ppb (7) N/A 4.0 ppb (4) N/A N/A N/A 0.19 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
June 10, 2021, noon 9.5 ppb (9) 4.0 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
June 10, 2021, 11 a.m. 18.0 ppb (17) 7.7 ppb (8) N/A 10.0 ppb (10) N/A N/A N/A 0.28 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
June 10, 2021, 10 a.m. 34.9 ppb (33) 14.8 ppb (14) N/A 20.0 ppb (19) N/A N/A N/A 0.37 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
June 10, 2021, 9 a.m. 37.7 ppb (36) 12.6 ppb (12) N/A 25.0 ppb (24) N/A N/A N/A 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
June 10, 2021, 8 a.m. 56.9 ppb (55) 25.9 ppb (25) N/A 31.0 ppb (30) N/A N/A N/A 0.35 ppb (4) N/A 4.0 μg/m3 (17) 30.0
 
June 10, 2021, 7 a.m. 24.0 ppb (23) 7.7 ppb (8) N/A 16.0 ppb (16) N/A N/A N/A 0.21 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
June 10, 2021, 6 a.m. 23.4 ppb (23) 6.5 ppb (7) N/A 17.0 ppb (17) N/A N/A N/A 0.19 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
June 10, 2021, 5 a.m. 32.9 ppb (32) 14.7 ppb (14) N/A 18.0 ppb (17) N/A N/A N/A 0.31 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
June 10, 2021, 4 a.m. 20.9 ppb (20) 8.9 ppb (9) N/A 12.0 ppb (12) N/A N/A N/A 0.38 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
June 10, 2021, 3 a.m. 16.0 ppb (16) 7.5 ppb (8) N/A 9.0 ppb (9) N/A N/A N/A 0.26 ppb (4) N/A 14.0 μg/m3 (55) 55.0
 
June 10, 2021, 2 a.m. 33.3 ppb (32) 16.3 ppb (16) N/A 17.0 ppb (17) N/A N/A N/A 0.57 ppb (7) N/A 17.0 μg/m3 (62) 62.0
 
June 10, 2021, 1 a.m. 42.5 ppb (41) 23.8 ppb (23) N/A 19.0 ppb (18) N/A N/A N/A 0.72 ppb (8) N/A 18.0 μg/m3 (64) 64.0
 
June 10, 2021, midnight 36.9 ppb (35) 18.1 ppb (18) N/A 19.0 ppb (18) N/A N/A N/A 0.75 ppb (10) N/A 15.0 μg/m3 (58) 58.0
 
June 9, 2021, 11 p.m. 38.2 ppb (37) 20.0 ppb (19) N/A 18.0 ppb (17) N/A N/A N/A 0.73 ppb (8) N/A 17.0 μg/m3 (62) 62.0
 
June 9, 2021, 10 p.m. 26.6 ppb (26) 12.0 ppb (12) N/A 15.0 ppb (15) N/A N/A N/A 0.49 ppb (6) N/A 17.0 μg/m3 (62) 62.0
 
June 9, 2021, 9 p.m. 32.0 ppb (31) 16.6 ppb (16) N/A 15.0 ppb (15) N/A N/A N/A 0.65 ppb (8) N/A 19.0 μg/m3 (66) 66.0
 
June 9, 2021, 8 p.m. 22.1 ppb (21) 10.6 ppb (10) N/A 12.0 ppb (12) N/A N/A N/A 0.53 ppb (6) N/A 22.0 μg/m3 (72) 72.0
 
June 9, 2021, 7 p.m. 37.7 ppb (36) 21.6 ppb (21) N/A 16.0 ppb (16) N/A N/A N/A 0.62 ppb (7) N/A 12.0 μg/m3 (50) 50.0
 
June 9, 2021, 6 p.m. 48.9 ppb (47) 26.6 ppb (26) N/A 22.0 ppb (21) N/A N/A N/A 0.77 ppb (10) N/A 11.0 μg/m3 (46) 46.0
 
June 9, 2021, 5 p.m. 31.6 ppb (30) 19.0 ppb (18) N/A 13.0 ppb (13) N/A N/A N/A 0.6 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
June 5, 2021, 10 a.m. 91.1 ppb (91) 72.7 ppb (71) N/A 18.0 ppb (17) N/A N/A N/A 1.24 ppb (14) N/A 7.0 μg/m3 (30) 71.0
 
June 5, 2021, 9 a.m. 73.2 ppb (72) 49.6 ppb (47) N/A 24.0 ppb (23) N/A N/A N/A 0.8 ppb (10) N/A 8.0 μg/m3 (34) 47.0
 
June 5, 2021, 8 a.m. 52.2 ppb (50) 32.0 ppb (31) N/A 20.0 ppb (19) N/A N/A N/A 0.56 ppb (7) N/A 8.0 μg/m3 (34) 34.0
 
June 5, 2021, 7 a.m. 28.1 ppb (27) 12.1 ppb (12) 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
 
June 5, 2021, 6 a.m. 23.7 ppb (23) 6.6 ppb (7) N/A 17.0 ppb (17) N/A N/A N/A 0.39 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
June 5, 2021, 5 a.m. 30.6 ppb (29) 13.6 ppb (13) N/A 17.0 ppb (17) N/A N/A N/A 0.52 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
June 5, 2021, 4 a.m. 56.9 ppb (55) 38.4 ppb (37) N/A 19.0 ppb (18) N/A N/A N/A 0.83 ppb (10) N/A 13.0 μg/m3 (53) 53.0
 
June 5, 2021, 3 a.m. 37.8 ppb (36) 23.1 ppb (22) N/A 15.0 ppb (15) N/A N/A N/A 0.69 ppb (8) N/A 7.0 μg/m3 (30) 30.0
 
June 5, 2021, 2 a.m. 34.5 ppb (33) 18.8 ppb (18) 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
 
June 5, 2021, 1 a.m. 48.5 ppb (46) 24.2 ppb (23) N/A 24.0 ppb (23) N/A N/A N/A 0.97 ppb (12) N/A 7.0 μg/m3 (30) 30.0
 
June 5, 2021, midnight 47.3 ppb (45) 25.3 ppb (24) N/A 22.0 ppb (21) N/A N/A N/A 0.84 ppb (10) N/A 9.0 μg/m3 (38) 38.0
 
June 4, 2021, 11 p.m. 49.2 ppb (47) 23.4 ppb (23) N/A 26.0 ppb (25) N/A N/A N/A 0.84 ppb (10) N/A 9.0 μg/m3 (38) 38.0
 
June 4, 2021, 10 p.m. 49.5 ppb (47) 23.9 ppb (23) N/A 26.0 ppb (25) N/A N/A N/A 0.83 ppb (10) N/A 10.0 μg/m3 (42) 42.0
 
June 4, 2021, 9 p.m. 41.1 ppb (39) 19.3 ppb (19) N/A 22.0 ppb (21) N/A N/A N/A 0.74 ppb (8) N/A 11.0 μg/m3 (46) 46.0
 
June 4, 2021, 8 p.m. 19.0 ppb (18) 8.1 ppb (8) N/A 11.0 ppb (11) N/A N/A N/A 0.39 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
June 4, 2021, 7 p.m. 34.9 ppb (33) 19.8 ppb (19) N/A 15.0 ppb (15) N/A N/A N/A 0.54 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
June 4, 2021, 6 p.m. 44.5 ppb (42) 23.4 ppb (23) N/A 21.0 ppb (20) N/A N/A N/A 0.57 ppb (7) N/A 7.0 μg/m3 (30) 30.0
 
June 4, 2021, 5 p.m. 45.0 ppb (43) 26.7 ppb (26) N/A 18.0 ppb (17) N/A N/A N/A 0.55 ppb (7) N/A 7.0 μg/m3 (30) 30.0
 
June 4, 2021, 4 p.m. 41.7 ppb (40) 26.2 ppb (25) N/A 16.0 ppb (16) N/A N/A N/A 0.47 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
June 4, 2021, 3 p.m. 34.4 ppb (33) 21.6 ppb (21) N/A 13.0 ppb (13) N/A N/A N/A 0.46 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
June 4, 2021, 2 p.m. 51.7 ppb (49) 38.2 ppb (37) N/A 14.0 ppb (14) N/A N/A N/A 0.55 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
June 4, 2021, 1 p.m. 41.9 ppb (40) 27.6 ppb (27) N/A 14.0 ppb (14) N/A N/A N/A 0.42 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
June 4, 2021, noon 51.1 ppb (49) 38.6 ppb (37) N/A 13.0 ppb (13) N/A N/A N/A 0.5 ppb (6) N/A 7.0 μg/m3 (30) 37.0
 
June 4, 2021, 11 a.m. 71.1 ppb (70) 54.8 ppb (52) N/A 16.0 ppb (16) N/A N/A N/A 0.63 ppb (7) N/A 6.0 μg/m3 (25) 52.0
 
June 4, 2021, 10 a.m. 66.0 ppb (64) 52.3 ppb (50) N/A 14.0 ppb (14) N/A N/A N/A 0.61 ppb (7) N/A 7.0 μg/m3 (30) 50.0
 
June 4, 2021, 9 a.m. 47.7 ppb (45) 37.5 ppb (36) N/A 10.0 ppb (10) N/A N/A N/A 0.43 ppb (5) N/A 4.0 μg/m3 (17) 36.0
 
June 4, 2021, 8 a.m. 25.7 ppb (25) 17.2 ppb (17) N/A 9.0 ppb (9) N/A N/A N/A 0.21 ppb (3) N/A 2.0 μg/m3 (9) 17.0
 
June 4, 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
 
June 4, 2021, 6 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
 
June 4, 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