ID: 2413

AQSQID: 440070030

Site Name: Near Road

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

Updated: July 9, 2020, 7:34 p.m.

Location: Providence (Downtown), RI

Reporting: True, Located: True

Current AQI: 63.0

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
July 9, 2020, 5 p.m. 10.6 ppb (10) 3.9 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.28 ppb (3) N/A 18.0 μg/m3 (63) 63.0
 
July 9, 2020, 4 p.m. 19.1 ppb (18) 8.0 ppb (7) N/A 11.0 ppb (10) N/A N/A N/A 0.32 ppb (4) N/A 14.0 μg/m3 (54) 54.0
 
July 9, 2020, 3 p.m. 28.8 ppb (27) 16.0 ppb (15) N/A 13.0 ppb (12) N/A N/A N/A 0.45 ppb (5) N/A 14.0 μg/m3 (54) 54.0
 
July 9, 2020, 2 p.m. 40.0 ppb (37) 22.9 ppb (21) N/A 17.0 ppb (16) N/A N/A N/A 0.51 ppb (6) N/A 13.0 μg/m3 (52) 52.0
 
July 9, 2020, 1 p.m. 52.9 ppb (49) 35.0 ppb (32) N/A 18.0 ppb (17) N/A N/A N/A 0.55 ppb (6) N/A 13.0 μg/m3 (52) 52.0
 
July 9, 2020, noon 51.4 ppb (48) 33.5 ppb (31) N/A 18.0 ppb (17) N/A N/A N/A 0.55 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
July 9, 2020, 11 a.m. 51.6 ppb (48) 32.6 ppb (30) N/A 19.0 ppb (18) N/A N/A N/A 0.54 ppb (6) N/A 14.0 μg/m3 (54) 54.0
 
July 9, 2020, 10 a.m. 61.4 ppb (58) 45.0 ppb (42) N/A 16.0 ppb (15) N/A N/A N/A 0.64 ppb (7) N/A 13.0 μg/m3 (52) 52.0
 
July 9, 2020, 9 a.m. 39.1 ppb (36) 24.6 ppb (23) N/A 15.0 ppb (14) N/A N/A N/A 0.43 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
July 9, 2020, 8 a.m. 34.5 ppb (32) 21.6 ppb (20) N/A 13.0 ppb (12) N/A N/A N/A 0.46 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
July 9, 2020, 7 a.m. 22.7 ppb (21) 15.4 ppb (14) N/A 7.0 ppb (6) N/A N/A N/A 0.4 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
July 9, 2020, 6 a.m. 18.0 ppb (17) 10.9 ppb (10) N/A 7.0 ppb (6) N/A N/A N/A 0.28 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
July 9, 2020, 5 a.m. 18.3 ppb (17) 10.8 ppb (10) N/A 8.0 ppb (7) N/A N/A N/A 0.36 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
July 9, 2020, 4 a.m. 16.1 ppb (15) 9.4 ppb (9) N/A 7.0 ppb (6) N/A N/A N/A 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
July 9, 2020, 3 a.m. 18.9 ppb (18) 10.7 ppb (10) N/A 8.0 ppb (7) N/A N/A N/A 0.49 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
July 9, 2020, 2 a.m. 21.1 ppb (20) 12.5 ppb (12) N/A 9.0 ppb (8) N/A N/A N/A 0.54 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
July 9, 2020, 1 a.m. 22.3 ppb (21) 15.4 ppb (14) N/A 7.0 ppb (6) N/A N/A N/A 0.53 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
July 9, 2020, midnight 24.7 ppb (23) 15.1 ppb (14) N/A 10.0 ppb (9) N/A N/A N/A 0.6 ppb (7) N/A 13.0 μg/m3 (52) 52.0
 
July 8, 2020, 11 p.m. 30.3 ppb (28) 19.3 ppb (18) N/A 11.0 ppb (10) N/A N/A N/A 0.67 ppb (7) N/A 7.0 μg/m3 (29) 29.0
 
July 8, 2020, 10 p.m. 24.5 ppb (23) 13.8 ppb (13) N/A 11.0 ppb (10) N/A N/A N/A 0.54 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
July 8, 2020, 9 p.m. 24.2 ppb (22) 15.3 ppb (14) N/A 9.0 ppb (8) N/A N/A N/A 0.54 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
July 8, 2020, 8 p.m. 25.7 ppb (24) 14.3 ppb (13) N/A 11.0 ppb (10) N/A N/A N/A 0.5 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
July 8, 2020, 7 p.m. 29.1 ppb (27) 13.3 ppb (12) N/A 16.0 ppb (15) N/A N/A N/A 0.53 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
July 8, 2020, 6 p.m. 27.2 ppb (25) 17.3 ppb (16) N/A 10.0 ppb (9) N/A N/A N/A 0.58 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
July 8, 2020, 5 p.m. 36.6 ppb (34) 22.5 ppb (21) N/A 14.0 ppb (13) N/A N/A N/A 0.62 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
July 8, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
July 8, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
July 8, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
July 8, 2020, 1 p.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
 
July 8, 2020, noon 47.7 ppb (44) 30.6 ppb (28) N/A 17.0 ppb (16) N/A N/A N/A 0.5 ppb (6) N/A 5.0 μg/m3 (21) 28.0
 
July 8, 2020, 11 a.m. 41.7 ppb (39) 30.7 ppb (28) N/A 11.0 ppb (10) N/A N/A N/A 0.4 ppb (4) N/A 5.0 μg/m3 (21) 28.0
 
July 8, 2020, 10 a.m. 52.4 ppb (49) 38.7 ppb (36) N/A 14.0 ppb (13) N/A N/A N/A 0.53 ppb (6) N/A 6.0 μg/m3 (25) 36.0
 
July 8, 2020, 9 a.m. 38.8 ppb (36) 27.3 ppb (25) N/A 12.0 ppb (11) N/A N/A N/A 0.4 ppb (4) N/A 3.0 μg/m3 (12) 25.0
 
July 8, 2020, 8 a.m. 26.4 ppb (24) 18.1 ppb (17) N/A 8.0 ppb (7) N/A N/A N/A 0.27 ppb (3) N/A 2.0 μg/m3 (8) 17.0
 
July 8, 2020, 7 a.m. 19.3 ppb (18) 10.9 ppb (10) N/A 9.0 ppb (8) N/A N/A N/A 0.2 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
July 8, 2020, 6 a.m. 12.7 ppb (12) 5.2 ppb (5) N/A 8.0 ppb (7) N/A N/A N/A 0.16 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 8, 2020, 5 a.m. 11.9 ppb (11) 4.6 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.24 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 8, 2020, 4 a.m. 14.3 ppb (13) 8.0 ppb (7) N/A 6.0 ppb (6) N/A N/A N/A 0.22 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
July 8, 2020, 3 a.m. 14.1 ppb (13) 7.9 ppb (7) N/A 6.0 ppb (6) N/A N/A N/A 0.32 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
July 8, 2020, 2 a.m. 15.9 ppb (15) 10.0 ppb (9) N/A 6.0 ppb (6) N/A N/A N/A 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 8, 2020, 1 a.m. 13.7 ppb (13) 8.8 ppb (8) N/A 5.0 ppb (5) N/A N/A N/A 0.31 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 8, 2020, midnight 14.8 ppb (14) 8.3 ppb (8) N/A 6.0 ppb (6) N/A N/A N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 7, 2020, 11 p.m. 27.6 ppb (26) 15.1 ppb (14) N/A 13.0 ppb (12) N/A N/A N/A 0.49 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
July 7, 2020, 10 p.m. 22.6 ppb (21) 14.2 ppb (13) N/A 8.0 ppb (7) N/A N/A N/A 0.38 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 7, 2020, 9 p.m. 15.8 ppb (15) 9.4 ppb (9) N/A 6.0 ppb (6) N/A N/A N/A 0.32 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 7, 2020, 8 p.m. 6.7 ppb (6) 2.7 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.19 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
July 7, 2020, 7 p.m. 24.9 ppb (23) 16.6 ppb (15) N/A 8.0 ppb (7) N/A N/A N/A 0.41 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
July 7, 2020, 6 p.m. 23.2 ppb (21) 12.6 ppb (12) N/A 11.0 ppb (10) N/A N/A N/A 0.3 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 7, 2020, 5 p.m. 15.0 ppb (14) 8.4 ppb (8) N/A 7.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 7, 2020, 4 p.m. 11.7 ppb (11) 5.3 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 7, 2020, 3 p.m. 15.8 ppb (15) 10.1 ppb (9) N/A 6.0 ppb (6) N/A N/A N/A 0.21 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
July 7, 2020, 2 p.m. 23.8 ppb (22) 14.9 ppb (14) N/A 9.0 ppb (8) N/A N/A N/A 0.28 ppb (3) N/A N/A 14.0
 
July 7, 2020, 1 p.m. 38.6 ppb (36) 30.6 ppb (28) N/A 8.0 ppb (7) N/A N/A N/A 0.4 ppb (4) N/A N/A 28.0
 
July 7, 2020, noon 37.7 ppb (35) 27.2 ppb (25) N/A 11.0 ppb (10) N/A N/A N/A 0.33 ppb (4) N/A N/A 25.0
 
July 7, 2020, 11 a.m. 25.0 ppb (23) 14.2 ppb (13) N/A 11.0 ppb (10) N/A N/A N/A 0.27 ppb (3) N/A N/A 13.0
 
July 7, 2020, 10 a.m. 37.2 ppb (34) 27.7 ppb (26) N/A 10.0 ppb (9) N/A N/A N/A 0.33 ppb (4) N/A N/A 26.0
 
July 7, 2020, 9 a.m. 36.6 ppb (34) 23.1 ppb (21) N/A 14.0 ppb (13) N/A N/A N/A 0.35 ppb (4) N/A N/A 21.0
 
July 7, 2020, 8 a.m. 21.6 ppb (20) 13.2 ppb (12) N/A 8.0 ppb (7) N/A N/A N/A 0.27 ppb (3) N/A N/A 12.0
 
July 7, 2020, 7 a.m. 14.3 ppb (13) 10.1 ppb (9) N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) N/A N/A 9.0
 
July 7, 2020, 6 a.m. 15.4 ppb (14) 8.3 ppb (8) N/A 7.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A N/A 8.0
 
July 7, 2020, 5 a.m. 12.9 ppb (12) 7.0 ppb (6) N/A 6.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A N/A 6.0
 
July 7, 2020, 4 a.m. 12.6 ppb (12) 7.0 ppb (6) N/A 6.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A N/A 6.0
 
July 7, 2020, 3 a.m. 11.7 ppb (11) 6.3 ppb (6) N/A 5.0 ppb (5) N/A N/A N/A 0.31 ppb (3) N/A N/A 6.0
 
July 7, 2020, 2 a.m. 12.2 ppb (11) 4.4 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.29 ppb (3) N/A N/A 7.0
 
July 7, 2020, 1 a.m. 9.7 ppb (9) 2.6 ppb (2) N/A 7.0 ppb (6) N/A N/A N/A 0.26 ppb (3) N/A N/A 6.0
 
July 7, 2020, midnight 11.8 ppb (11) 3.8 ppb (4) N/A 8.0 ppb (7) N/A N/A N/A 0.27 ppb (3) N/A N/A 7.0
 
July 6, 2020, 11 p.m. 11.4 ppb (11) 5.3 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.28 ppb (3) N/A N/A 6.0
 
July 6, 2020, 10 p.m. 10.2 ppb (9) 4.2 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.23 ppb (3) N/A N/A 6.0
 
July 6, 2020, 9 p.m. 5.4 ppb (5) 2.8 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A N/A 3.0
 
July 6, 2020, 8 p.m. 6.0 ppb (6) 3.2 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.24 ppb (3) N/A N/A 3.0
 
July 6, 2020, 7 p.m. 6.5 ppb (6) 2.8 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.24 ppb (3) N/A N/A 4.0
 
July 6, 2020, 6 p.m. 5.9 ppb (5) 3.5 ppb (3) N/A 2.0 ppb (2) N/A N/A N/A 0.23 ppb (3) N/A N/A 3.0
 
July 6, 2020, 5 p.m. 8.2 ppb (8) 4.3 ppb (4) N/A 4.0 ppb (4) N/A N/A N/A 0.23 ppb (3) N/A N/A 4.0
 
July 6, 2020, 4 p.m. 8.4 ppb (8) 4.0 ppb (4) N/A 4.0 ppb (4) N/A N/A N/A 0.26 ppb (3) N/A N/A 4.0
 
July 6, 2020, 3 p.m. 14.7 ppb (14) 8.5 ppb (8) N/A 6.0 ppb (6) N/A N/A N/A 0.34 ppb (4) N/A N/A 8.0
 
July 6, 2020, 2 p.m. 13.9 ppb (13) 8.4 ppb (8) N/A 5.0 ppb (5) N/A N/A N/A 0.27 ppb (3) N/A N/A 8.0
 
July 6, 2020, 1 p.m. 24.3 ppb (23) 17.1 ppb (16) N/A 7.0 ppb (6) N/A N/A N/A 0.33 ppb (4) N/A N/A 16.0
 
July 6, 2020, noon 42.3 ppb (39) 31.5 ppb (29) N/A 11.0 ppb (10) N/A N/A N/A 0.46 ppb (5) N/A N/A 29.0
 
July 6, 2020, 11 a.m. 48.4 ppb (45) 37.7 ppb (35) N/A 11.0 ppb (10) N/A N/A N/A 0.52 ppb (6) N/A N/A 35.0
 
July 6, 2020, 10 a.m. 52.5 ppb (49) 38.5 ppb (36) N/A 14.0 ppb (13) N/A N/A N/A 0.62 ppb (7) N/A N/A 36.0
 
July 6, 2020, 9 a.m. 42.3 ppb (39) 29.5 ppb (27) N/A 13.0 ppb (12) N/A N/A N/A 0.57 ppb (6) N/A N/A 27.0
 
July 6, 2020, 8 a.m. 33.3 ppb (31) 19.7 ppb (18) N/A 14.0 ppb (13) N/A N/A N/A 0.47 ppb (5) N/A N/A 18.0
 
July 6, 2020, 7 a.m. 20.7 ppb (19) 13.7 ppb (13) N/A 7.0 ppb (6) N/A N/A N/A 0.32 ppb (4) N/A N/A 13.0
 
July 6, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
July 6, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
July 6, 2020, 4 a.m. 15.6 ppb (14) 8.2 ppb (8) N/A 7.0 ppb (6) N/A N/A N/A 0.27 ppb (3) N/A N/A 8.0
 
July 6, 2020, 3 a.m. 15.5 ppb (14) 8.0 ppb (7) N/A 8.0 ppb (7) N/A N/A N/A 0.53 ppb (6) N/A N/A 7.0
 
July 6, 2020, 2 a.m. 15.9 ppb (15) 7.3 ppb (7) N/A 9.0 ppb (8) N/A N/A N/A 0.45 ppb (5) N/A N/A 8.0
 
July 6, 2020, 1 a.m. 17.6 ppb (16) 8.5 ppb (8) N/A 9.0 ppb (8) N/A N/A N/A 0.47 ppb (5) N/A N/A 8.0
 
July 6, 2020, midnight 10.7 ppb (10) 3.9 ppb (4) N/A 7.0 ppb (6) N/A N/A N/A 0.37 ppb (4) N/A N/A 6.0
 
July 5, 2020, 11 p.m. 6.3 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.3 ppb (3) N/A N/A 4.0
 
July 5, 2020, 10 p.m. 8.5 ppb (8) 3.1 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.35 ppb (4) N/A N/A 5.0
 
July 5, 2020, 9 p.m. 7.3 ppb (7) 2.6 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.33 ppb (4) N/A N/A 5.0
 
July 5, 2020, 8 p.m. 8.2 ppb (8) 3.3 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.34 ppb (4) N/A N/A 5.0
 
July 5, 2020, 7 p.m. 8.5 ppb (8) 3.6 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.32 ppb (4) N/A N/A 5.0
 
July 5, 2020, 6 p.m. 7.5 ppb (7) 2.5 ppb (2) N/A 5.0 ppb (5) N/A N/A N/A 0.31 ppb (3) N/A N/A 5.0
 
July 5, 2020, 5 p.m. 9.5 ppb (9) 3.5 ppb (3) N/A 6.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A N/A 6.0
 
July 5, 2020, 4 p.m. 22.9 ppb (21) 13.5 ppb (12) N/A 9.0 ppb (8) N/A N/A N/A 0.53 ppb (6) N/A N/A 12.0
 
July 5, 2020, 3 p.m. 22.2 ppb (21) 13.0 ppb (12) N/A 9.0 ppb (8) N/A N/A N/A 0.52 ppb (6) N/A N/A 12.0
 
July 5, 2020, 2 p.m. 17.8 ppb (16) 9.6 ppb (9) N/A 8.0 ppb (7) N/A N/A N/A 0.43 ppb (5) N/A N/A 9.0
 
July 5, 2020, 1 p.m. 14.5 ppb (13) 8.6 ppb (8) N/A 6.0 ppb (6) N/A N/A N/A 0.39 ppb (4) N/A N/A 8.0
 
July 5, 2020, noon 16.7 ppb (15) 10.3 ppb (10) N/A 7.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A N/A 10.0
 
July 5, 2020, 11 a.m. 12.1 ppb (11) 6.8 ppb (6) N/A 5.0 ppb (5) N/A N/A N/A 0.3 ppb (3) N/A N/A 6.0
 
July 5, 2020, 10 a.m. 10.9 ppb (10) 5.4 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.3 ppb (3) N/A N/A 6.0
 
July 5, 2020, 9 a.m. 6.9 ppb (6) 4.3 ppb (4) N/A 3.0 ppb (3) N/A N/A N/A 0.31 ppb (3) N/A N/A 4.0
 
July 5, 2020, 8 a.m. 5.1 ppb (5) 2.4 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.27 ppb (3) N/A N/A 3.0
 
July 5, 2020, 7 a.m. 5.9 ppb (5) 4.0 ppb (4) N/A 2.0 ppb (2) N/A N/A N/A 0.38 ppb (4) N/A N/A 4.0
 
July 5, 2020, 6 a.m. 9.1 ppb (8) 4.8 ppb (4) N/A 4.0 ppb (4) N/A N/A N/A 0.39 ppb (4) N/A N/A 4.0
 
July 5, 2020, 5 a.m. 14.8 ppb (14) 9.7 ppb (9) N/A 5.0 ppb (5) N/A N/A N/A 0.51 ppb (6) N/A N/A 9.0
 
July 5, 2020, 4 a.m. 21.1 ppb (20) 11.2 ppb (10) N/A 10.0 ppb (9) N/A N/A N/A 0.5 ppb (6) N/A N/A 10.0
 
July 5, 2020, 3 a.m. 23.4 ppb (22) 13.6 ppb (13) N/A 10.0 ppb (9) N/A N/A N/A 0.63 ppb (7) N/A N/A 13.0
 
July 5, 2020, 2 a.m. 30.0 ppb (28) 15.1 ppb (14) N/A 15.0 ppb (14) N/A N/A N/A 0.73 ppb (8) N/A N/A 14.0
 
July 5, 2020, 1 a.m. 22.5 ppb (21) 11.3 ppb (10) N/A 11.0 ppb (10) N/A N/A N/A 0.55 ppb (6) N/A N/A 10.0
 
July 5, 2020, midnight 21.8 ppb (20) 11.5 ppb (11) N/A 10.0 ppb (9) N/A N/A N/A 0.49 ppb (5) N/A N/A 11.0
 
July 4, 2020, 11 p.m. 21.0 ppb (19) 10.3 ppb (10) N/A 11.0 ppb (10) N/A N/A N/A 0.61 ppb (7) N/A N/A 10.0
 
July 4, 2020, 10 p.m. 14.2 ppb (13) 5.0 ppb (5) N/A 9.0 ppb (8) N/A N/A N/A 0.35 ppb (4) N/A N/A 8.0
 
July 4, 2020, 9 p.m. 5.5 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A N/A 0.26 ppb (3) N/A N/A 4.0
 
July 4, 2020, 8 p.m. 16.9 ppb (16) 8.1 ppb (8) N/A 9.0 ppb (8) N/A N/A N/A 0.51 ppb (6) N/A N/A 8.0
 
July 4, 2020, 7 p.m. 17.1 ppb (16) 9.0 ppb (8) N/A 8.0 ppb (7) N/A N/A N/A 0.47 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
July 4, 2020, 6 p.m. 20.1 ppb (19) 13.4 ppb (12) N/A 7.0 ppb (6) N/A N/A N/A 0.55 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
July 4, 2020, 5 p.m. 11.4 ppb (11) 6.6 ppb (6) N/A 5.0 ppb (5) N/A N/A N/A 0.37 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 4, 2020, 4 p.m. 10.3 ppb (10) 6.9 ppb (6) N/A 3.0 ppb (3) N/A N/A N/A 0.29 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
July 4, 2020, 3 p.m. 10.1 ppb (9) 6.7 ppb (6) N/A 3.0 ppb (3) N/A N/A N/A 0.3 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
July 4, 2020, 2 p.m. 24.4 ppb (23) 15.4 ppb (14) N/A 9.0 ppb (8) N/A N/A N/A 0.54 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
July 4, 2020, 1 p.m. 19.0 ppb (18) 12.9 ppb (12) N/A 6.0 ppb (6) N/A N/A N/A 0.38 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
July 4, 2020, noon 17.9 ppb (17) 11.8 ppb (11) N/A 6.0 ppb (6) N/A N/A N/A 0.35 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
July 4, 2020, 11 a.m. 5.9 ppb (5) 2.5 ppb (2) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 4, 2020, 10 a.m. 10.0 ppb (9) 5.0 ppb (5) N/A 5.0 ppb (5) N/A N/A N/A 0.24 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 4, 2020, 9 a.m. 7.1 ppb (7) 4.0 ppb (4) N/A 3.0 ppb (3) N/A N/A N/A 0.21 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
July 4, 2020, 8 a.m. 8.0 ppb (7) 4.0 ppb (4) N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
July 4, 2020, 7 a.m. 7.3 ppb (7) 3.3 ppb (3) N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
July 4, 2020, 6 a.m. 6.2 ppb (6) 2.5 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.34 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
July 4, 2020, 5 a.m. 6.6 ppb (6) 2.4 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 4, 2020, 4 a.m. 13.4 ppb (12) 5.8 ppb (5) N/A 8.0 ppb (7) N/A N/A N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
July 4, 2020, 3 a.m. 12.0 ppb (11) 5.0 ppb (5) N/A 7.0 ppb (6) N/A N/A N/A 0.39 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 4, 2020, 2 a.m. 15.2 ppb (14) 8.5 ppb (8) N/A 7.0 ppb (6) N/A N/A N/A 0.37 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 4, 2020, 1 a.m. 15.0 ppb (14) 7.5 ppb (7) N/A 8.0 ppb (7) N/A N/A N/A 0.39 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
July 4, 2020, midnight 9.9 ppb (9) 3.5 ppb (3) N/A 7.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
July 3, 2020, 11 p.m. 6.6 ppb (6) 2.6 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
July 3, 2020, 10 p.m. 6.3 ppb (6) 2.3 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
July 3, 2020, 9 p.m. 12.7 ppb (12) 8.3 ppb (8) N/A 4.0 ppb (4) N/A N/A N/A 0.31 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
July 3, 2020, 8 p.m. 9.4 ppb (9) 4.3 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 3, 2020, 7 p.m. 9.2 ppb (9) 5.3 ppb (5) N/A 4.0 ppb (4) N/A N/A N/A 0.25 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
July 3, 2020, 6 p.m. 8.4 ppb (8) 4.4 ppb (4) N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 3, 2020, 5 p.m. 6.2 ppb (6) 3.6 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
July 3, 2020, 4 p.m. 5.0 ppb (5) 3.7 ppb (3) N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
July 3, 2020, 3 p.m. 6.1 ppb (6) 4.0 ppb (4) N/A 2.0 ppb (2) N/A N/A N/A 0.2 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
July 3, 2020, 2 p.m. 6.2 ppb (6) 3.3 ppb (3) N/A 3.0 ppb (3) N/A N/A N/A 0.18 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
July 3, 2020, 1 p.m. 5.5 ppb (5) 1.9 ppb (2) N/A 4.0 ppb (4) N/A N/A N/A 0.22 ppb (2) N/A 16.0 μg/m3 (59) 59.0
 
July 3, 2020, noon 13.3 ppb (12) 7.1 ppb (7) N/A 6.0 ppb (6) N/A N/A N/A 0.28 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
July 3, 2020, 11 a.m. 38.1 ppb (35) 22.9 ppb (21) N/A 15.0 ppb (14) N/A N/A N/A 0.54 ppb (6) N/A 13.0 μg/m3 (52) 52.0
 
July 3, 2020, 10 a.m. 37.7 ppb (35) 24.0 ppb (22) N/A 14.0 ppb (13) N/A N/A N/A 0.51 ppb (6) N/A 15.0 μg/m3 (56) 56.0
 
July 3, 2020, 9 a.m. 38.4 ppb (36) 24.5 ppb (23) N/A 14.0 ppb (13) N/A N/A N/A 0.47 ppb (5) N/A 13.0 μg/m3 (52) 52.0
 
July 3, 2020, 8 a.m. 28.4 ppb (26) 20.2 ppb (19) N/A 8.0 ppb (7) N/A N/A N/A 0.41 ppb (5) N/A 15.0 μg/m3 (56) 56.0
 
July 3, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (52) 52.0
 
July 3, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 15.0 μg/m3 (56) 56.0
 
July 3, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (54) 54.0
 
July 3, 2020, 3 a.m. 27.9 ppb (26) 12.9 ppb (12) N/A 15.0 ppb (14) N/A N/A N/A 0.78 ppb (9) N/A 10.0 μg/m3 (42) 42.0
 
July 3, 2020, 2 a.m. 31.5 ppb (29) 12.7 ppb (12) N/A 19.0 ppb (18) N/A N/A N/A 0.77 ppb (9) N/A 13.0 μg/m3 (52) 52.0
 
July 3, 2020, 1 a.m. 36.6 ppb (34) 14.1 ppb (13) N/A 23.0 ppb (21) N/A N/A N/A 0.88 ppb (10) N/A 9.0 μg/m3 (38) 38.0
 
July 3, 2020, midnight 32.1 ppb (30) 12.7 ppb (12) N/A 20.0 ppb (19) N/A N/A N/A 0.9 ppb (10) N/A 7.0 μg/m3 (29) 29.0
 
July 2, 2020, 11 p.m. 33.0 ppb (31) 14.0 ppb (13) N/A 19.0 ppb (18) N/A N/A N/A 0.87 ppb (10) N/A 8.0 μg/m3 (33) 33.0
 
July 2, 2020, 10 p.m. 15.4 ppb (14) 4.1 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.51 ppb (6) N/A 8.0 μg/m3 (33) 33.0
 
July 2, 2020, 9 p.m. 15.4 ppb (14) 4.4 ppb (4) N/A 11.0 ppb (10) N/A N/A N/A 0.5 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
July 2, 2020, 8 p.m. 11.1 ppb (10) 3.0 ppb (3) N/A 8.0 ppb (7) N/A N/A N/A 0.47 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
July 2, 2020, 7 p.m. 13.3 ppb (12) 4.2 ppb (4) N/A 9.0 ppb (8) N/A N/A N/A 0.47 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
July 2, 2020, 6 p.m. 14.4 ppb (13) 6.8 ppb (6) N/A 8.0 ppb (7) N/A N/A N/A 0.56 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
July 2, 2020, 5 p.m. 28.0 ppb (26) 13.4 ppb (12) N/A 15.0 ppb (14) N/A N/A N/A 0.7 ppb (8) N/A 9.0 μg/m3 (38) 38.0