ID: 2413

AQSQID: 440070030

Site Name: Near Road

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

Updated: April 10, 2021, 5:43 p.m.

Location: Providence (Downtown), RI

Reporting: True, Located: True

Current AQI: 30.0

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
April 10, 2021, 5 p.m. 10.3 ppb (10) 3.9 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.31 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
April 10, 2021, 4 p.m. 15.3 ppb (15) 7.7 ppb (8) N/A 8.0 ppb (8) N/A N/A N/A 0.36 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
April 10, 2021, 3 p.m. 10.8 ppb (11) 5.4 ppb (6) N/A 5.0 ppb (5) N/A N/A N/A 0.31 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
April 10, 2021, 2 p.m. 10.0 ppb (10) 3.8 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.27 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
April 10, 2021, 1 p.m. 42.1 ppb (40) 27.5 ppb (26) N/A 15.0 ppb (15) N/A N/A N/A 0.5 ppb (6) N/A 6.0 μg/m3 (25) 26.0
 
April 10, 2021, noon 54.9 ppb (52) 32.3 ppb (31) N/A 23.0 ppb (22) N/A N/A N/A 0.53 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
April 10, 2021, 11 a.m. 49.8 ppb (47) 36.4 ppb (35) N/A 13.0 ppb (13) N/A N/A N/A 0.51 ppb (6) N/A 5.0 μg/m3 (21) 35.0
 
April 10, 2021, 10 a.m. 41.5 ppb (40) 25.8 ppb (25) N/A 16.0 ppb (16) N/A N/A N/A 0.44 ppb (5) N/A 5.0 μg/m3 (21) 25.0
 
April 10, 2021, 9 a.m. 38.6 ppb (37) 25.9 ppb (25) N/A 13.0 ppb (13) N/A N/A N/A 0.44 ppb (5) N/A 5.0 μg/m3 (21) 25.0
 
April 10, 2021, 8 a.m. 27.6 ppb (27) 14.5 ppb (14) N/A 13.0 ppb (13) N/A N/A N/A 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
April 10, 2021, 7 a.m. 18.5 ppb (18) 8.3 ppb (8) N/A 10.0 ppb (10) N/A N/A N/A 0.39 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
April 10, 2021, 6 a.m. 21.6 ppb (21) 12.0 ppb (12) N/A 10.0 ppb (10) N/A N/A N/A 0.48 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
April 10, 2021, 5 a.m. 18.7 ppb (18) 11.4 ppb (11) N/A 7.0 ppb (7) N/A N/A N/A 0.46 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
April 10, 2021, 4 a.m. 21.0 ppb (20) 12.3 ppb (12) N/A 9.0 ppb (9) N/A N/A N/A 0.38 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
April 10, 2021, 3 a.m. 23.4 ppb (23) 13.2 ppb (13) N/A 10.0 ppb (10) N/A N/A N/A 0.55 ppb (7) N/A 6.0 μg/m3 (25) 25.0
 
April 10, 2021, 2 a.m. 31.7 ppb (30) 18.2 ppb (18) N/A 14.0 ppb (14) N/A N/A N/A 0.58 ppb (7) N/A 9.0 μg/m3 (38) 38.0
 
April 10, 2021, 1 a.m. 15.7 ppb (15) 6.3 ppb (6) N/A 9.0 ppb (9) N/A N/A N/A 0.35 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 10, 2021, midnight 15.1 ppb (15) 4.8 ppb (5) N/A 10.0 ppb (10) N/A N/A N/A 0.36 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
April 9, 2021, 11 p.m. 8.9 ppb (9) 3.6 ppb (4) N/A 5.0 ppb (5) N/A N/A N/A 0.26 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
April 9, 2021, 10 p.m. 9.2 ppb (9) 5.0 ppb (5) N/A 4.0 ppb (4) N/A N/A N/A 0.26 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
April 9, 2021, 9 p.m. 8.8 ppb (9) 4.8 ppb (5) N/A 4.0 ppb (4) N/A N/A N/A 0.25 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
April 9, 2021, 8 p.m. 11.0 ppb (11) 4.3 ppb (5) N/A 7.0 ppb (7) N/A N/A N/A 0.25 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
April 9, 2021, 7 p.m. 12.4 ppb (12) 4.3 ppb (5) N/A 8.0 ppb (8) N/A N/A N/A 0.25 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
April 9, 2021, 6 p.m. 13.1 ppb (13) 5.3 ppb (5) 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
 
April 9, 2021, 5 p.m. 10.1 ppb (10) 4.1 ppb (4) 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
 
April 9, 2021, 4 p.m. 7.4 ppb (7) 2.6 ppb (3) 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
 
April 9, 2021, 3 p.m. 25.5 ppb (25) 15.7 ppb (15) N/A 10.0 ppb (10) N/A N/A N/A 0.34 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
April 9, 2021, 2 p.m. 32.8 ppb (31) 16.6 ppb (16) N/A 16.0 ppb (16) N/A N/A N/A 0.37 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 9, 2021, 1 p.m. 70.8 ppb (69) 45.7 ppb (44) N/A 25.0 ppb (24) N/A N/A N/A 0.62 ppb (7) N/A 10.0 μg/m3 (42) 44.0
 
April 9, 2021, noon 56.4 ppb (54) 34.7 ppb (33) N/A 22.0 ppb (21) N/A N/A N/A 0.57 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
April 9, 2021, 11 a.m. 82.0 ppb (81) 56.1 ppb (54) N/A 26.0 ppb (25) N/A N/A N/A 0.67 ppb (8) N/A 8.0 μg/m3 (34) 54.0
 
April 9, 2021, 10 a.m. 89.0 ppb (89) 63.4 ppb (62) N/A 26.0 ppb (25) N/A N/A N/A 0.77 ppb (10) N/A 7.0 μg/m3 (30) 62.0
 
April 9, 2021, 9 a.m. 69.0 ppb (67) 45.1 ppb (43) N/A 24.0 ppb (23) N/A N/A N/A 0.6 ppb (7) N/A 6.0 μg/m3 (25) 43.0
 
April 9, 2021, 8 a.m. 36.8 ppb (35) 21.7 ppb (21) N/A 15.0 ppb (15) N/A N/A N/A 0.32 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
April 9, 2021, 7 a.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
 
April 9, 2021, 6 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
 
April 9, 2021, 5 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
 
April 9, 2021, 4 a.m. 22.5 ppb (22) 12.7 ppb (12) N/A 10.0 ppb (10) N/A N/A N/A 0.28 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
April 9, 2021, 3 a.m. 24.6 ppb (24) 14.9 ppb (15) N/A 10.0 ppb (10) N/A N/A N/A 0.42 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
April 9, 2021, 2 a.m. 32.0 ppb (31) 15.8 ppb (15) N/A 16.0 ppb (16) N/A N/A N/A 0.47 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
April 9, 2021, 1 a.m. 13.4 ppb (13) 3.8 ppb (4) N/A 10.0 ppb (10) N/A N/A N/A 0.3 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
April 9, 2021, midnight 14.0 ppb (14) 4.0 ppb (4) N/A 10.0 ppb (10) N/A N/A N/A 0.28 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
April 8, 2021, 11 p.m. 11.2 ppb (11) 4.8 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.28 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
April 8, 2021, 10 p.m. 9.5 ppb (9) 4.0 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.26 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
April 8, 2021, 9 p.m. 8.2 ppb (8) 5.2 ppb (5) N/A 3.0 ppb (3) N/A N/A N/A 0.22 ppb (3) N/A 1.0 μg/m3 (5) 5.0
 
April 8, 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
 
April 8, 2021, 7 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
 
April 8, 2021, 6 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
 
April 8, 2021, 5 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
 
April 8, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
April 8, 2021, 3 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
 
April 8, 2021, 2 p.m. 18.6 ppb (18) 10.5 ppb (10) N/A 8.0 ppb (8) N/A N/A N/A 0.28 ppb (4) N/A 2.0 μg/m3 (9) 10.0
 
April 8, 2021, 1 p.m. 17.5 ppb (17) 9.8 ppb (10) N/A 8.0 ppb (8) N/A N/A N/A 0.27 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
April 8, 2021, noon 25.9 ppb (25) 15.5 ppb (15) N/A 10.0 ppb (10) N/A N/A N/A 0.32 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 8, 2021, 11 a.m. 55.5 ppb (53) 34.1 ppb (33) N/A 22.0 ppb (21) N/A N/A N/A 0.51 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
April 8, 2021, 10 a.m. 75.5 ppb (74) 52.5 ppb (50) N/A 23.0 ppb (22) N/A N/A N/A 0.7 ppb (8) N/A 10.0 μg/m3 (42) 50.0
 
April 8, 2021, 9 a.m. 76.1 ppb (75) 50.6 ppb (48) N/A 26.0 ppb (25) N/A N/A N/A 0.58 ppb (7) N/A 9.0 μg/m3 (38) 48.0
 
April 8, 2021, 8 a.m. 66.6 ppb (65) 43.4 ppb (41) N/A 23.0 ppb (22) N/A N/A N/A 0.42 ppb (5) N/A 8.0 μg/m3 (34) 41.0
 
April 8, 2021, 7 a.m. 45.6 ppb (44) 24.3 ppb (23) N/A 21.0 ppb (20) N/A N/A N/A 0.42 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
April 8, 2021, 6 a.m. 54.3 ppb (52) 29.9 ppb (29) N/A 24.0 ppb (23) N/A N/A N/A 0.45 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
April 8, 2021, 5 a.m. 53.9 ppb (51) 29.3 ppb (28) N/A 25.0 ppb (24) N/A N/A N/A 0.68 ppb (8) N/A 9.0 μg/m3 (38) 38.0
 
April 8, 2021, 4 a.m. 76.8 ppb (76) 45.8 ppb (44) N/A 31.0 ppb (30) N/A N/A N/A 0.58 ppb (7) N/A 8.0 μg/m3 (34) 44.0
 
April 8, 2021, 3 a.m. 74.6 ppb (73) 45.8 ppb (44) N/A 29.0 ppb (28) N/A N/A N/A 0.84 ppb (10) N/A 6.0 μg/m3 (25) 44.0
 
April 8, 2021, 2 a.m. 58.5 ppb (56) 32.0 ppb (31) N/A 27.0 ppb (26) N/A N/A N/A 0.86 ppb (11) N/A 5.0 μg/m3 (21) 31.0
 
April 8, 2021, 1 a.m. 16.7 ppb (16) 4.4 ppb (5) N/A 12.0 ppb (12) N/A N/A N/A 0.33 ppb (4) N/A 1.0 μg/m3 (5) 12.0
 
April 8, 2021, midnight 16.4 ppb (16) 4.6 ppb (5) N/A 12.0 ppb (12) N/A N/A N/A 0.32 ppb (4) N/A 2.0 μg/m3 (9) 12.0
 
April 7, 2021, 11 p.m. 12.1 ppb (12) 5.5 ppb (6) N/A 7.0 ppb (7) N/A N/A N/A 0.3 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
April 7, 2021, 10 p.m. 10.7 ppb (11) 5.0 ppb (5) N/A 6.0 ppb (6) N/A N/A N/A 0.26 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
April 7, 2021, 9 p.m. 12.4 ppb (12) 5.6 ppb (6) N/A 7.0 ppb (7) N/A N/A N/A 0.3 ppb (4) N/A 3.0 μg/m3 (13) 13.0
 
April 7, 2021, 8 p.m. 9.9 ppb (10) 3.6 ppb (4) N/A 6.0 ppb (6) N/A N/A N/A 0.25 ppb (3) N/A 2.0 μg/m3 (9) 9.0
 
April 7, 2021, 7 p.m. 11.0 ppb (11) 6.2 ppb (6) N/A 5.0 ppb (5) N/A N/A N/A 0.26 ppb (4) N/A 2.0 μg/m3 (9) 9.0
 
April 7, 2021, 6 p.m. 16.0 ppb (16) 7.9 ppb (8) N/A 8.0 ppb (8) N/A N/A N/A 0.29 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
April 7, 2021, 5 p.m. 20.6 ppb (20) 10.3 ppb (10) N/A 10.0 ppb (10) N/A N/A N/A 0.35 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
April 7, 2021, 4 p.m. 29.1 ppb (28) 16.3 ppb (16) N/A 13.0 ppb (13) N/A N/A N/A 0.42 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
April 7, 2021, 3 p.m. 27.8 ppb (27) 16.6 ppb (16) N/A 11.0 ppb (11) N/A N/A N/A 0.38 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
April 7, 2021, 2 p.m. 32.4 ppb (31) 21.0 ppb (20) N/A 12.0 ppb (12) N/A N/A N/A 0.39 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
April 7, 2021, 1 p.m. 29.8 ppb (29) 17.2 ppb (17) N/A 13.0 ppb (13) N/A N/A N/A 0.39 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
April 7, 2021, noon 71.2 ppb (70) 45.9 ppb (44) N/A 25.0 ppb (24) N/A N/A N/A 0.64 ppb (7) N/A 14.0 μg/m3 (55) 55.0
 
April 7, 2021, 11 a.m. 99.7 ppb (100) 70.8 ppb (69) N/A 29.0 ppb (28) N/A N/A N/A 0.89 ppb (11) N/A 9.0 μg/m3 (38) 69.0
 
April 7, 2021, 10 a.m. 103.1 ppb (102) 69.6 ppb (68) N/A 34.0 ppb (33) N/A N/A N/A 0.9 ppb (11) N/A 9.0 μg/m3 (38) 68.0
 
April 7, 2021, 9 a.m. 92.4 ppb (92) 61.4 ppb (59) N/A 31.0 ppb (30) N/A N/A N/A 0.63 ppb (7) N/A 10.0 μg/m3 (42) 59.0
 
April 7, 2021, 8 a.m. 71.8 ppb (70) 44.2 ppb (42) N/A 28.0 ppb (27) N/A N/A N/A 0.49 ppb (6) N/A 9.0 μg/m3 (38) 42.0
 
April 7, 2021, 7 a.m. 61.4 ppb (59) 36.5 ppb (35) N/A 25.0 ppb (24) N/A N/A N/A 0.36 ppb (5) N/A 7.0 μg/m3 (30) 35.0
 
April 7, 2021, 6 a.m. 51.4 ppb (49) 27.6 ppb (27) N/A 24.0 ppb (23) N/A N/A N/A 0.37 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
April 7, 2021, 5 a.m. 41.1 ppb (39) 17.4 ppb (17) N/A 24.0 ppb (23) N/A N/A N/A 0.55 ppb (7) N/A 8.0 μg/m3 (34) 34.0
 
April 7, 2021, 4 a.m. 41.4 ppb (40) 17.5 ppb (17) N/A 24.0 ppb (23) N/A N/A N/A 0.48 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
April 7, 2021, 3 a.m. 47.6 ppb (45) 21.5 ppb (21) N/A 26.0 ppb (25) N/A N/A N/A 0.66 ppb (8) N/A 8.0 μg/m3 (34) 34.0
 
April 7, 2021, 2 a.m. 37.3 ppb (36) 17.6 ppb (17) N/A 20.0 ppb (19) N/A N/A N/A 0.58 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
April 7, 2021, 1 a.m. 35.6 ppb (34) 16.4 ppb (16) N/A 19.0 ppb (18) N/A N/A N/A 0.52 ppb (6) N/A 4.0 μg/m3 (17) 18.0
 
April 7, 2021, midnight 27.6 ppb (27) 10.0 ppb (10) N/A 18.0 ppb (17) N/A N/A N/A 0.44 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
April 6, 2021, 11 p.m. 17.1 ppb (17) 4.7 ppb (5) N/A 12.0 ppb (12) N/A N/A N/A 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
April 6, 2021, 10 p.m. 18.7 ppb (18) 6.7 ppb (7) 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
 
April 6, 2021, 9 p.m. 20.3 ppb (20) 11.1 ppb (11) N/A 9.0 ppb (9) N/A N/A N/A 0.42 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
April 6, 2021, 8 p.m. 41.5 ppb (40) 26.6 ppb (26) N/A 15.0 ppb (15) N/A N/A N/A 0.59 ppb (7) N/A 4.0 μg/m3 (17) 26.0
 
April 6, 2021, 7 p.m. 51.9 ppb (49) 34.5 ppb (33) N/A 17.0 ppb (17) N/A N/A N/A 0.62 ppb (7) N/A 5.0 μg/m3 (21) 33.0
 
April 6, 2021, 6 p.m. 37.4 ppb (36) 22.6 ppb (22) N/A 15.0 ppb (15) N/A N/A N/A 0.42 ppb (5) N/A 5.0 μg/m3 (21) 22.0
 
April 6, 2021, 5 p.m. 35.8 ppb (34) 25.1 ppb (24) N/A 11.0 ppb (11) N/A N/A N/A 0.48 ppb (6) N/A 4.0 μg/m3 (17) 24.0
 
April 6, 2021, 4 p.m. 38.9 ppb (37) 24.6 ppb (24) N/A 14.0 ppb (14) N/A N/A N/A 0.4 ppb (5) N/A 5.0 μg/m3 (21) 24.0
 
April 6, 2021, 3 p.m. 39.5 ppb (38) 24.7 ppb (24) N/A 15.0 ppb (15) N/A N/A N/A 0.42 ppb (5) N/A 5.0 μg/m3 (21) 24.0
 
April 6, 2021, 2 p.m. 40.1 ppb (38) 30.5 ppb (29) N/A 10.0 ppb (10) N/A N/A N/A 0.39 ppb (5) N/A 5.0 μg/m3 (21) 29.0
 
April 6, 2021, 1 p.m. 48.8 ppb (47) 34.9 ppb (33) N/A 14.0 ppb (14) N/A N/A N/A 0.43 ppb (5) N/A 4.0 μg/m3 (17) 33.0
 
April 6, 2021, noon 55.2 ppb (53) 40.1 ppb (38) N/A 15.0 ppb (15) N/A N/A N/A 0.51 ppb (6) N/A 7.0 μg/m3 (30) 38.0
 
April 6, 2021, 11 a.m. 76.2 ppb (75) 54.8 ppb (52) N/A 21.0 ppb (20) N/A N/A N/A 0.64 ppb (7) N/A 11.0 μg/m3 (46) 52.0
 
April 6, 2021, 10 a.m. 85.9 ppb (85) 54.3 ppb (52) N/A 32.0 ppb (31) N/A N/A N/A 0.66 ppb (8) N/A 8.0 μg/m3 (34) 52.0
 
April 6, 2021, 9 a.m. 67.0 ppb (65) 43.1 ppb (41) N/A 24.0 ppb (23) N/A N/A N/A 0.54 ppb (6) N/A 9.0 μg/m3 (38) 41.0
 
April 6, 2021, 8 a.m. 34.6 ppb (33) 16.6 ppb (16) N/A 18.0 ppb (17) N/A N/A N/A 0.34 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 6, 2021, 7 a.m. 20.2 ppb (20) 8.1 ppb (8) N/A 12.0 ppb (12) N/A N/A N/A 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 6, 2021, 6 a.m. 23.4 ppb (23) 9.9 ppb (10) N/A 14.0 ppb (14) N/A N/A N/A 0.22 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 6, 2021, 5 a.m. 14.2 ppb (14) 6.5 ppb (7) N/A 8.0 ppb (8) N/A N/A N/A 0.23 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
April 6, 2021, 4 a.m. 17.6 ppb (17) 7.5 ppb (8) N/A 10.0 ppb (10) N/A N/A N/A 0.21 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
April 6, 2021, 3 a.m. 17.4 ppb (17) 10.5 ppb (10) N/A 7.0 ppb (7) N/A N/A N/A 0.27 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
April 6, 2021, 2 a.m. 22.9 ppb (22) 11.1 ppb (11) N/A 12.0 ppb (12) N/A N/A N/A 0.31 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
April 6, 2021, 1 a.m. 14.9 ppb (15) 9.1 ppb (9) N/A 6.0 ppb (6) N/A N/A N/A 0.33 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
April 6, 2021, midnight 18.9 ppb (18) 12.1 ppb (12) N/A 7.0 ppb (7) N/A N/A N/A 0.37 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
April 5, 2021, 11 p.m. 28.1 ppb (27) 16.7 ppb (16) N/A 11.0 ppb (11) N/A N/A N/A 0.42 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
April 5, 2021, 10 p.m. 30.8 ppb (30) 18.0 ppb (17) N/A 13.0 ppb (13) N/A N/A N/A 0.45 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
April 5, 2021, 9 p.m. 27.6 ppb (27) 16.0 ppb (16) N/A 12.0 ppb (12) N/A N/A N/A 0.41 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
April 5, 2021, 8 p.m. 29.5 ppb (28) 17.6 ppb (17) 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
 
April 5, 2021, 7 p.m. 29.1 ppb (28) 20.8 ppb (20) N/A 8.0 ppb (8) N/A N/A N/A 0.38 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
April 5, 2021, 6 p.m. 34.8 ppb (33) 24.6 ppb (24) N/A 10.0 ppb (10) N/A N/A N/A 0.42 ppb (5) N/A 5.0 μg/m3 (21) 24.0
 
April 5, 2021, 5 p.m. 40.2 ppb (38) 27.4 ppb (26) N/A 13.0 ppb (13) N/A N/A N/A 0.43 ppb (5) N/A 6.0 μg/m3 (25) 26.0
 
April 5, 2021, 4 p.m. 35.4 ppb (34) 19.8 ppb (19) N/A 16.0 ppb (16) N/A N/A N/A 0.38 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
April 5, 2021, 3 p.m. 32.6 ppb (31) 22.3 ppb (22) N/A 10.0 ppb (10) N/A N/A N/A 0.33 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
April 5, 2021, 2 p.m. 38.2 ppb (37) 22.6 ppb (22) N/A 16.0 ppb (16) N/A N/A N/A 0.39 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
April 5, 2021, 1 p.m. 45.7 ppb (44) 28.8 ppb (28) N/A 17.0 ppb (17) N/A N/A N/A 0.38 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
April 5, 2021, noon 45.0 ppb (43) 29.3 ppb (28) N/A 16.0 ppb (16) N/A N/A N/A 0.41 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
April 5, 2021, 11 a.m. 58.3 ppb (56) 38.5 ppb (37) N/A 20.0 ppb (19) N/A N/A N/A 0.48 ppb (6) N/A 8.0 μg/m3 (34) 37.0
 
April 5, 2021, 10 a.m. 58.8 ppb (57) 37.2 ppb (36) N/A 22.0 ppb (21) N/A N/A N/A 0.58 ppb (7) N/A 7.0 μg/m3 (30) 36.0
 
April 5, 2021, 9 a.m. 40.0 ppb (38) 25.4 ppb (24) N/A 15.0 ppb (15) N/A N/A N/A 0.42 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
April 5, 2021, 8 a.m. 25.0 ppb (24) 14.7 ppb (14) N/A 10.0 ppb (10) N/A N/A N/A 0.29 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
April 5, 2021, 7 a.m. 15.5 ppb (15) 8.3 ppb (8) N/A 7.0 ppb (7) N/A N/A N/A 0.22 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
April 5, 2021, 6 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
 
April 5, 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
 
April 5, 2021, 4 a.m. 7.8 ppb (8) 2.6 ppb (3) N/A 5.0 ppb (5) N/A N/A N/A 0.22 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 5, 2021, 3 a.m. 13.5 ppb (13) 6.3 ppb (6) N/A 7.0 ppb (7) N/A N/A N/A 0.28 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
April 5, 2021, 2 a.m. 19.6 ppb (19) 9.5 ppb (9) N/A 10.0 ppb (10) N/A N/A N/A 0.42 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
April 5, 2021, 1 a.m. 26.9 ppb (26) 12.6 ppb (12) N/A 14.0 ppb (14) N/A N/A N/A 0.49 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
April 5, 2021, midnight 26.5 ppb (25) 16.8 ppb (16) N/A 10.0 ppb (10) N/A N/A N/A 0.46 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
April 4, 2021, 11 p.m. 21.5 ppb (21) 10.8 ppb (11) N/A 11.0 ppb (11) N/A N/A N/A 0.43 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
April 4, 2021, 10 p.m. 25.9 ppb (25) 14.7 ppb (14) N/A 11.0 ppb (11) N/A N/A N/A 0.52 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
April 4, 2021, 9 p.m. 25.3 ppb (24) 16.6 ppb (16) N/A 9.0 ppb (9) N/A N/A N/A 0.47 ppb (6) N/A 3.0 μg/m3 (13) 16.0
 
April 4, 2021, 8 p.m. 26.2 ppb (25) 14.9 ppb (15) N/A 11.0 ppb (11) N/A N/A N/A 0.5 ppb (6) N/A 3.0 μg/m3 (13) 15.0
 
April 4, 2021, 7 p.m. 23.1 ppb (22) 17.1 ppb (17) N/A 6.0 ppb (6) N/A N/A N/A 0.48 ppb (6) N/A 2.0 μg/m3 (9) 17.0
 
April 4, 2021, 6 p.m. 24.8 ppb (24) 15.6 ppb (15) N/A 9.0 ppb (9) N/A N/A N/A 0.44 ppb (5) N/A 3.0 μg/m3 (13) 15.0
 
April 4, 2021, 5 p.m. 17.9 ppb (17) 9.6 ppb (10) N/A 8.0 ppb (8) N/A N/A N/A 0.39 ppb (5) N/A 4.0 μg/m3 (17) 17.0
 
April 4, 2021, 4 p.m. 22.9 ppb (22) 14.4 ppb (14) N/A 9.0 ppb (9) N/A N/A N/A 0.44 ppb (5) N/A 3.0 μg/m3 (13) 14.0
 
April 4, 2021, 3 p.m. 26.3 ppb (25) 16.5 ppb (16) N/A 10.0 ppb (10) N/A N/A N/A 0.44 ppb (5) N/A 3.0 μg/m3 (13) 16.0
 
April 4, 2021, 2 p.m. 25.3 ppb (24) 17.9 ppb (17) N/A 7.0 ppb (7) N/A N/A N/A 0.43 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
April 4, 2021, 1 p.m. 27.3 ppb (26) 16.1 ppb (16) N/A 11.0 ppb (11) N/A N/A N/A 0.4 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 4, 2021, noon 44.4 ppb (42) 23.7 ppb (23) N/A 21.0 ppb (20) N/A N/A N/A 0.52 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
April 4, 2021, 11 a.m. 62.0 ppb (60) 33.1 ppb (32) N/A 29.0 ppb (28) N/A N/A N/A 0.71 ppb (8) N/A 6.0 μg/m3 (25) 32.0
 
April 4, 2021, 10 a.m. 77.6 ppb (77) 46.1 ppb (44) N/A 32.0 ppb (31) N/A N/A N/A 0.9 ppb (11) N/A 6.0 μg/m3 (25) 44.0
 
April 4, 2021, 9 a.m. 64.6 ppb (63) 31.4 ppb (30) N/A 33.0 ppb (32) N/A N/A N/A 0.55 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
April 4, 2021, 8 a.m. 39.1 ppb (37) 12.8 ppb (13) N/A 26.0 ppb (25) N/A N/A N/A 0.52 ppb (6) N/A 15.0 μg/m3 (58) 58.0
 
April 4, 2021, 7 a.m. 38.0 ppb (36) 12.4 ppb (12) N/A 26.0 ppb (25) N/A N/A N/A 0.48 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
April 4, 2021, 6 a.m. 39.2 ppb (37) 13.5 ppb (13) N/A 26.0 ppb (25) N/A N/A N/A 0.81 ppb (10) N/A 14.0 μg/m3 (55) 55.0
 
April 4, 2021, 5 a.m. 43.6 ppb (42) 17.8 ppb (17) N/A 26.0 ppb (25) N/A N/A N/A 0.75 ppb (10) N/A 10.0 μg/m3 (42) 42.0
 
April 4, 2021, 4 a.m. 38.6 ppb (37) 18.8 ppb (18) N/A 20.0 ppb (19) N/A N/A N/A 0.5 ppb (6) N/A 17.0 μg/m3 (62) 62.0
 
April 4, 2021, 3 a.m. 41.1 ppb (39) 21.1 ppb (20) N/A 20.0 ppb (19) N/A N/A N/A 0.82 ppb (10) N/A 18.0 μg/m3 (64) 64.0
 
April 4, 2021, 2 a.m. 50.7 ppb (48) 26.6 ppb (26) N/A 24.0 ppb (23) N/A N/A N/A 0.86 ppb (11) N/A 15.0 μg/m3 (58) 58.0
 
April 4, 2021, 1 a.m. 62.5 ppb (61) 30.6 ppb (29) N/A 32.0 ppb (31) N/A N/A N/A 0.9 ppb (11) N/A 14.0 μg/m3 (55) 55.0
 
April 4, 2021, midnight 66.8 ppb (65) 33.2 ppb (32) N/A 34.0 ppb (33) N/A N/A N/A 0.96 ppb (12) N/A 6.0 μg/m3 (25) 33.0
 
April 3, 2021, 11 p.m. 49.5 ppb (47) 23.9 ppb (23) N/A 26.0 ppb (25) N/A N/A N/A 0.77 ppb (10) N/A 5.0 μg/m3 (21) 25.0
 
April 3, 2021, 10 p.m. 40.8 ppb (39) 23.0 ppb (22) N/A 18.0 ppb (17) N/A N/A N/A 0.71 ppb (8) N/A 4.0 μg/m3 (17) 22.0
 
April 3, 2021, 9 p.m. 30.8 ppb (30) 17.6 ppb (17) N/A 13.0 ppb (13) N/A N/A N/A 0.56 ppb (7) N/A 3.0 μg/m3 (13) 17.0
 
April 3, 2021, 8 p.m. 27.3 ppb (26) 15.5 ppb (15) N/A 12.0 ppb (12) N/A N/A N/A 0.49 ppb (6) N/A 4.0 μg/m3 (17) 17.0
 
April 3, 2021, 7 p.m. 23.2 ppb (22) 14.2 ppb (14) N/A 9.0 ppb (9) N/A N/A N/A 0.42 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
April 3, 2021, 6 p.m. 26.6 ppb (26) 18.4 ppb (18) N/A 8.0 ppb (8) N/A N/A N/A 0.44 ppb (5) N/A 5.0 μg/m3 (21) 21.0