ID: 739

AQSQID: 440071010

Site Name: E Providence

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

Updated: Jan. 25, 2021, 3:31 a.m.

Location: Rumford (Rumford), RI

Reporting: True, Located: True

Current AQI: 36.0

Rumford (Rumford) RI, US: 41.840302, -71.361702

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 25, 2021, 2 a.m. 2.6 ppb (3) 0.1 ppb (1) 2.4 ppb (3) 3.0 ppb (3) 2.2 ppb (3) 0.0 ppb (0) 38.0 ppb (36) 0.16 ppb (3) N/A 1.0 μg/m3 (5) 36.0
 
Jan. 25, 2021, 1 a.m. 2.6 ppb (3) 0.1 ppb (1) 2.4 ppb (3) 3.0 ppb (3) 2.3 ppb (3) 0.0 ppb (0) 38.0 ppb (36) 0.16 ppb (3) N/A -1.0 μg/m3 (0) 36.0
 
Jan. 25, 2021, midnight 2.2 ppb (3) 0.0 ppb (0) 2.1 ppb (2) 2.0 ppb (2) 2.0 ppb (2) 0.0 ppb (0) 39.0 ppb (37) 0.17 ppb (3) N/A -1.0 μg/m3 (0) 37.0
 
Jan. 24, 2021, 11 p.m. 2.6 ppb (3) 0.1 ppb (1) 2.4 ppb (3) 3.0 ppb (3) 2.2 ppb (3) 0.0 ppb (0) 39.0 ppb (37) 0.16 ppb (3) N/A -1.0 μg/m3 (0) 37.0
 
Jan. 24, 2021, 10 p.m. 2.7 ppb (3) 0.1 ppb (1) 2.5 ppb (3) 3.0 ppb (3) 2.4 ppb (3) 0.0 ppb (0) 39.0 ppb (37) 0.16 ppb (3) N/A 0.0 μg/m3 (0) 37.0
 
Jan. 24, 2021, 9 p.m. 1.9 ppb (2) 0.1 ppb (1) 1.7 ppb (2) 2.0 ppb (2) 1.6 ppb (2) 0.0 ppb (0) 41.0 ppb (38) 0.15 ppb (2) N/A 1.0 μg/m3 (5) 38.0
 
Jan. 24, 2021, 8 p.m. 1.5 ppb (2) 0.2 ppb (1) 1.3 ppb (2) 1.0 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 41.0 ppb (38) 0.15 ppb (2) N/A 1.0 μg/m3 (5) 38.0
 
Jan. 24, 2021, 7 p.m. 1.3 ppb (2) 0.3 ppb (1) 1.1 ppb (2) 1.0 ppb (1) 0.8 ppb (1) 0.0 ppb (0) 41.0 ppb (38) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 38.0
 
Jan. 24, 2021, 6 p.m. 1.2 ppb (2) 0.3 ppb (1) 1.0 ppb (1) 1.0 ppb (1) 0.6 ppb (1) 0.0 ppb (0) 41.0 ppb (38) 0.15 ppb (2) N/A 1.0 μg/m3 (5) 38.0
 
Jan. 24, 2021, 5 p.m. 1.2 ppb (2) 0.3 ppb (1) 1.0 ppb (1) 1.0 ppb (1) 0.6 ppb (1) 0.0 ppb (0) 41.0 ppb (38) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 38.0
 
Jan. 24, 2021, 4 p.m. 1.2 ppb (2) 0.4 ppb (1) 1.1 ppb (2) 1.0 ppb (1) 0.6 ppb (1) 0.0 ppb (0) 40.0 ppb (38) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 38.0
 
Jan. 24, 2021, 3 p.m. 1.3 ppb (2) 0.4 ppb (1) 1.2 ppb (2) 1.0 ppb (1) 0.7 ppb (1) 0.0 ppb (0) 39.0 ppb (37) 0.15 ppb (2) N/A -1.0 μg/m3 (0) 37.0
 
Jan. 24, 2021, 2 p.m. 1.5 ppb (2) 0.4 ppb (1) 1.3 ppb (2) 1.0 ppb (1) 0.9 ppb (1) 0.0 ppb (0) 38.0 ppb (36) 0.14 ppb (2) N/A 0.0 μg/m3 (0) 36.0
 
Jan. 24, 2021, 1 p.m. 2.5 ppb (3) 0.5 ppb (1) 2.3 ppb (3) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.15 ppb (2) N/A 1.0 μg/m3 (5) 34.0
 
Jan. 24, 2021, noon 3.0 ppb (3) 0.2 ppb (1) 2.8 ppb (3) 3.0 ppb (3) 2.6 ppb (3) 0.0 ppb (0) 35.0 ppb (33) 0.15 ppb (2) N/A 1.0 μg/m3 (5) 33.0
 
Jan. 24, 2021, 11 a.m. 2.6 ppb (3) 0.0 ppb (0) 2.4 ppb (3) 3.0 ppb (3) 2.3 ppb (3) 0.0 ppb (0) 36.0 ppb (34) 0.14 ppb (2) N/A 1.0 μg/m3 (5) 34.0
 
Jan. 24, 2021, 10 a.m. 2.9 ppb (3) 0.0 ppb (0) 2.7 ppb (3) 3.0 ppb (3) 2.6 ppb (3) 0.0 ppb (0) 35.0 ppb (33) 0.15 ppb (2) N/A 0.0 μg/m3 (0) 33.0
 
Jan. 24, 2021, 9 a.m. 2.4 ppb (3) 0.1 ppb (1) 2.2 ppb (3) 2.0 ppb (2) 2.1 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.14 ppb (2) N/A 0.0 μg/m3 (0) 34.0
 
Jan. 24, 2021, 8 a.m. 2.3 ppb (3) 0.0 ppb (0) 2.0 ppb (2) 2.0 ppb (2) 1.9 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.14 ppb (2) N/A -1.0 μg/m3 (0) 34.0
 
Jan. 24, 2021, 7 a.m. 2.4 ppb (3) 0.0 ppb (0) 2.3 ppb (3) 2.0 ppb (2) 2.1 ppb (2) 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) N/A 0.0 μg/m3 (0) 32.0
 
Jan. 24, 2021, 6 a.m. 2.2 ppb (3) 0.1 ppb (1) 2.0 ppb (2) 2.0 ppb (2) 1.9 ppb (2) 0.0 ppb (0) 34.0 ppb (32) 0.14 ppb (2) N/A 3.0 μg/m3 (13) 32.0
 
Jan. 24, 2021, 5 a.m. 1.9 ppb (2) 0.1 ppb (1) 1.6 ppb (2) 2.0 ppb (2) 1.5 ppb (2) 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 32.0
 
Jan. 24, 2021, 4 a.m. 1.9 ppb (2) 0.1 ppb (1) 1.7 ppb (2) 2.0 ppb (2) 1.6 ppb (2) 0.0 ppb (0) 35.0 ppb (33) 0.13 ppb (2) N/A 0.0 μg/m3 (0) 33.0
 
Jan. 24, 2021, 3 a.m. 1.9 ppb (2) 0.1 ppb (1) 1.7 ppb (2) 2.0 ppb (2) 1.5 ppb (2) 0.0 ppb (0) 35.0 ppb (33) 0.16 ppb (3) N/A 1.0 μg/m3 (5) 33.0
 
Jan. 24, 2021, 2 a.m. 1.8 ppb (2) 0.1 ppb (1) 1.6 ppb (2) 2.0 ppb (2) 1.4 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.16 ppb (3) N/A 1.0 μg/m3 (5) 34.0
 
Jan. 24, 2021, 1 a.m. 1.9 ppb (2) 0.1 ppb (1) 1.7 ppb (2) 2.0 ppb (2) 1.6 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.16 ppb (3) N/A 1.0 μg/m3 (5) 34.0
 
Jan. 24, 2021, midnight 1.8 ppb (2) 0.1 ppb (1) 1.6 ppb (2) 2.0 ppb (2) 1.4 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.16 ppb (3) N/A 2.0 μg/m3 (9) 34.0
 
Jan. 23, 2021, 11 p.m. 2.0 ppb (2) 0.1 ppb (1) 1.8 ppb (2) 2.0 ppb (2) 1.7 ppb (2) 0.0 ppb (0) 34.0 ppb (32) 0.16 ppb (3) N/A 1.0 μg/m3 (5) 32.0
 
Jan. 23, 2021, 10 p.m. 1.8 ppb (2) 0.1 ppb (1) 1.6 ppb (2) 2.0 ppb (2) 1.5 ppb (2) 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) N/A -1.0 μg/m3 (0) 32.0
 
Jan. 23, 2021, 9 p.m. 2.0 ppb (2) 0.2 ppb (1) 1.8 ppb (2) 2.0 ppb (2) 1.6 ppb (2) 0.0 ppb (0) 34.0 ppb (32) 0.16 ppb (3) N/A 1.0 μg/m3 (5) 32.0
 
Jan. 23, 2021, 8 p.m. 1.7 ppb (2) 0.3 ppb (1) 1.5 ppb (2) 1.0 ppb (1) 1.2 ppb (2) 0.0 ppb (0) 34.0 ppb (32) 0.16 ppb (3) N/A 1.0 μg/m3 (5) 32.0
 
Jan. 23, 2021, 7 p.m. 1.2 ppb (2) 0.3 ppb (1) 1.1 ppb (2) 1.0 ppb (1) 0.8 ppb (1) 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) N/A 3.0 μg/m3 (13) 32.0
 
Jan. 23, 2021, 6 p.m. 1.3 ppb (2) 0.3 ppb (1) 1.2 ppb (2) 1.0 ppb (1) 0.8 ppb (1) 0.0 ppb (0) 35.0 ppb (33) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 33.0
 
Jan. 23, 2021, 5 p.m. 1.3 ppb (2) 0.4 ppb (1) 1.2 ppb (2) 1.0 ppb (1) 0.8 ppb (1) 0.0 ppb (0) 35.0 ppb (33) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 33.0
 
Jan. 23, 2021, 4 p.m. 1.4 ppb (2) 0.4 ppb (1) 1.3 ppb (2) 1.0 ppb (1) 0.8 ppb (1) 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 32.0
 
Jan. 23, 2021, 3 p.m. 1.5 ppb (2) 0.5 ppb (1) 1.4 ppb (2) 1.0 ppb (1) 0.9 ppb (1) 0.0 ppb (0) 32.0 ppb (30) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 30.0
 
Jan. 23, 2021, 2 p.m. 1.8 ppb (2) 0.5 ppb (1) 1.6 ppb (2) 1.0 ppb (1) 1.1 ppb (2) 0.0 ppb (0) 32.0 ppb (30) 0.15 ppb (2) N/A 3.0 μg/m3 (13) 30.0
 
Jan. 23, 2021, 1 p.m. 2.4 ppb (3) 0.5 ppb (1) 2.2 ppb (3) 2.0 ppb (2) 1.7 ppb (2) 0.0 ppb (0) 31.0 ppb (29) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 29.0
 
Jan. 23, 2021, noon 3.0 ppb (3) 0.2 ppb (1) 2.8 ppb (3) 3.0 ppb (3) 2.6 ppb (3) 0.0 ppb (0) 30.0 ppb (28) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 28.0
 
Jan. 23, 2021, 11 a.m. 2.7 ppb (3) 0.0 ppb (0) 2.5 ppb (3) 3.0 ppb (3) 2.4 ppb (3) 0.0 ppb (0) 29.0 ppb (27) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 27.0
 
Jan. 23, 2021, 10 a.m. 2.8 ppb (3) 0.0 ppb (0) 2.5 ppb (3) 3.0 ppb (3) 2.5 ppb (3) 0.0 ppb (0) 29.0 ppb (27) 0.16 ppb (3) N/A 2.0 μg/m3 (9) 27.0
 
Jan. 23, 2021, 9 a.m. 2.8 ppb (3) 0.0 ppb (0) 2.7 ppb (3) 3.0 ppb (3) 2.6 ppb (3) 0.0 ppb (0) 30.0 ppb (28) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 28.0
 
Jan. 23, 2021, 8 a.m. 3.1 ppb (3) 0.0 ppb (0) 2.9 ppb (3) 3.0 ppb (3) 2.8 ppb (3) 0.0 ppb (0) 30.0 ppb (28) 0.15 ppb (2) N/A 0.0 μg/m3 (0) 28.0
 
Jan. 23, 2021, 7 a.m. 3.7 ppb (4) 0.0 ppb (0) 3.5 ppb (4) 4.0 ppb (4) 3.4 ppb (4) 0.0 ppb (0) 28.0 ppb (26) 0.16 ppb (3) N/A 2.0 μg/m3 (9) 26.0
 
Jan. 23, 2021, 6 a.m. 4.2 ppb (4) 0.0 ppb (0) 4.0 ppb (4) 4.0 ppb (4) 4.0 ppb (4) 0.0 ppb (0) 27.0 ppb (25) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
Jan. 23, 2021, 5 a.m. 4.2 ppb (4) 0.0 ppb (0) 4.0 ppb (4) 4.0 ppb (4) 3.9 ppb (4) 0.0 ppb (0) 27.0 ppb (25) 0.17 ppb (3) N/A 1.0 μg/m3 (5) 25.0
 
Jan. 23, 2021, 4 a.m. 3.6 ppb (4) 0.0 ppb (0) 3.4 ppb (4) 4.0 ppb (4) 3.3 ppb (4) 0.0 ppb (0) 28.0 ppb (26) 0.14 ppb (2) N/A 2.0 μg/m3 (9) 26.0
 
Jan. 23, 2021, 3 a.m. 5.9 ppb (6) 0.0 ppb (0) 5.7 ppb (6) 6.0 ppb (6) 5.7 ppb (6) 0.0 ppb (0) 26.0 ppb (25) 0.2 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
Jan. 23, 2021, 2 a.m. 8.3 ppb (8) 0.0 ppb (0) 8.1 ppb (8) 8.0 ppb (8) 8.0 ppb (8) 0.0 ppb (0) 24.0 ppb (23) 0.22 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 23, 2021, 1 a.m. 6.4 ppb (7) 0.0 ppb (0) 6.2 ppb (6) 6.0 ppb (6) 6.1 ppb (6) 0.0 ppb (0) 27.0 ppb (25) 0.2 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
Jan. 23, 2021, midnight 7.1 ppb (7) 0.0 ppb (0) 6.5 ppb (7) 7.0 ppb (7) 6.4 ppb (7) 0.0 ppb (0) 27.0 ppb (25) 0.21 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
Jan. 22, 2021, 11 p.m. 12.4 ppb (12) 0.0 ppb (0) 11.7 ppb (12) 12.0 ppb (12) 11.6 ppb (11) 0.0 ppb (0) 23.0 ppb (22) 0.27 ppb (4) N/A 4.0 μg/m3 (17) 22.0
 
Jan. 22, 2021, 10 p.m. 7.7 ppb (8) 0.0 ppb (0) 7.4 ppb (7) 8.0 ppb (8) 7.3 ppb (7) 0.0 ppb (0) 28.0 ppb (26) 0.21 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
Jan. 22, 2021, 9 p.m. 3.9 ppb (4) 0.1 ppb (1) 13.6 ppb (13) 4.0 ppb (4) 13.5 ppb (13) 0.0 ppb (0) 32.0 ppb (30) 0.18 ppb (3) N/A N/A 30.0
 
Jan. 22, 2021, 8 p.m. 3.8 ppb (4) 0.2 ppb (1) 3.4 ppb (4) 4.0 ppb (4) 3.2 ppb (4) 0.0 ppb (0) 34.0 ppb (32) 0.17 ppb (3) N/A 3.0 μg/m3 (13) 32.0
 
Jan. 22, 2021, 7 p.m. 4.5 ppb (5) 0.4 ppb (1) 4.2 ppb (4) 4.0 ppb (4) 3.8 ppb (4) 0.0 ppb (0) 34.0 ppb (32) 0.17 ppb (3) N/A 3.0 μg/m3 (13) 32.0
 
Jan. 22, 2021, 6 p.m. 3.0 ppb (3) 0.4 ppb (1) 2.7 ppb (3) 3.0 ppb (3) 2.2 ppb (3) 0.0 ppb (0) 36.0 ppb (34) 0.16 ppb (3) N/A 5.0 μg/m3 (21) 34.0
 
Jan. 22, 2021, 5 p.m. 3.9 ppb (4) 0.8 ppb (1) 3.5 ppb (4) 3.0 ppb (3) 2.6 ppb (3) 0.0 ppb (0) 35.0 ppb (33) 0.17 ppb (3) N/A 7.0 μg/m3 (30) 33.0
 
Jan. 22, 2021, 4 p.m. 6.6 ppb (7) 1.7 ppb (2) 6.2 ppb (6) 5.0 ppb (5) 4.4 ppb (5) 0.0 ppb (0) 31.0 ppb (29) 0.19 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 22, 2021, 3 p.m. 12.7 ppb (12) 3.3 ppb (4) 12.4 ppb (12) 9.0 ppb (9) 9.1 ppb (9) 1.0 ppb (2) 24.0 ppb (23) 0.24 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 22, 2021, 2 p.m. 30.8 ppb (30) 10.6 ppb (10) 30.5 ppb (29) 20.0 ppb (19) 20.1 ppb (19) 1.0 ppb (2) 12.0 ppb (12) 0.37 ppb (5) N/A 18.0 μg/m3 (64) 64.0
 
Jan. 22, 2021, 1 p.m. 50.4 ppb (48) 23.3 ppb (22) 45.6 ppb (44) 27.0 ppb (26) 26.4 ppb (25) 1.0 ppb (2) 4.0 ppb (4) 0.58 ppb (7) N/A 16.0 μg/m3 (60) 60.0
 
Jan. 22, 2021, noon 60.6 ppb (59) 31.4 ppb (30) 56.9 ppb (55) 29.0 ppb (28) 29.7 ppb (29) 1.0 ppb (2) 2.0 ppb (2) 0.59 ppb (7) N/A 15.0 μg/m3 (58) 59.0
 
Jan. 22, 2021, 11 a.m. 86.3 ppb (86) 56.1 ppb (54) 82.6 ppb (82) 30.0 ppb (29) 30.7 ppb (29) 1.0 ppb (2) 1.0 ppb (1) 0.64 ppb (7) N/A 15.0 μg/m3 (58) 86.0
 
Jan. 22, 2021, 10 a.m. 77.3 ppb (76) 47.8 ppb (46) 76.7 ppb (76) 30.0 ppb (29) 29.3 ppb (28) 1.0 ppb (2) 1.0 ppb (1) 0.49 ppb (6) N/A 15.0 μg/m3 (58) 76.0
 
Jan. 22, 2021, 9 a.m. 45.3 ppb (43) 17.6 ppb (17) 43.5 ppb (42) 28.0 ppb (27) 26.4 ppb (25) 0.0 ppb (0) 1.0 ppb (1) 0.42 ppb (5) N/A 17.0 μg/m3 (62) 62.0
 
Jan. 22, 2021, 8 a.m. 39.1 ppb (37) 10.7 ppb (11) 37.3 ppb (36) 28.0 ppb (27) 25.7 ppb (25) 0.0 ppb (0) 1.0 ppb (1) 0.37 ppb (5) N/A 15.0 μg/m3 (58) 58.0
 
Jan. 22, 2021, 7 a.m. N/A N/A 27.4 ppb (26) N/A 22.2 ppb (21) N/A 4.0 ppb (4) N/A N/A 12.0 μg/m3 (50) 50.0
 
Jan. 22, 2021, 6 a.m. N/A N/A 27.9 ppb (27) N/A 19.2 ppb (19) N/A 2.0 ppb (2) N/A N/A 16.0 μg/m3 (60) 60.0
 
Jan. 22, 2021, 5 a.m. N/A N/A 23.1 ppb (22) N/A 10.8 ppb (11) N/A 2.0 ppb (2) N/A N/A 13.0 μg/m3 (53) 53.0
 
Jan. 22, 2021, 4 a.m. 43.6 ppb (42) 14.1 ppb (14) N/A 29.0 ppb (28) N/A 0.0 ppb (0) 2.0 ppb (2) 0.38 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
Jan. 22, 2021, 3 a.m. 48.3 ppb (46) 17.8 ppb (17) N/A 31.0 ppb (30) N/A 1.0 ppb (2) 2.0 ppb (2) 0.57 ppb (7) N/A 19.0 μg/m3 (66) 66.0
 
Jan. 22, 2021, 2 a.m. 42.4 ppb (40) 10.8 ppb (11) N/A 32.0 ppb (31) N/A 1.0 ppb (2) 3.0 ppb (3) 0.46 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
Jan. 22, 2021, 1 a.m. 26.1 ppb (25) 1.3 ppb (2) 26.7 ppb (26) 25.0 ppb (24) 25.3 ppb (24) 1.0 ppb (2) 12.0 ppb (12) 0.33 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
Jan. 22, 2021, midnight 26.3 ppb (25) 2.0 ppb (2) 27.4 ppb (26) 24.0 ppb (23) 25.0 ppb (24) 1.0 ppb (2) 13.0 ppb (13) 0.3 ppb (4) N/A 18.0 μg/m3 (64) 64.0
 
Jan. 21, 2021, 11 p.m. 21.1 ppb (20) 1.3 ppb (2) 22.3 ppb (22) 20.0 ppb (19) 20.7 ppb (20) 1.0 ppb (2) 17.0 ppb (16) 0.27 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 21, 2021, 10 p.m. 16.2 ppb (16) 0.7 ppb (1) 17.2 ppb (17) 15.0 ppb (15) 16.2 ppb (16) 0.0 ppb (0) 22.0 ppb (21) 0.26 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 21, 2021, 9 p.m. 13.1 ppb (13) 0.5 ppb (1) 13.9 ppb (14) 13.0 ppb (13) 13.2 ppb (13) 1.0 ppb (2) 25.0 ppb (24) 0.24 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 21, 2021, 8 p.m. 12.9 ppb (13) 1.2 ppb (2) 13.2 ppb (13) 12.0 ppb (12) 11.9 ppb (12) 1.0 ppb (2) 26.0 ppb (25) 0.22 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Jan. 21, 2021, 7 p.m. 11.9 ppb (12) 1.4 ppb (2) 11.9 ppb (12) 11.0 ppb (11) 10.4 ppb (10) 1.0 ppb (2) 27.0 ppb (25) 0.21 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
Jan. 21, 2021, 6 p.m. 9.3 ppb (9) 1.7 ppb (2) 10.3 ppb (10) 8.0 ppb (8) 8.5 ppb (9) 0.0 ppb (0) 29.0 ppb (27) 0.19 ppb (3) N/A 4.0 μg/m3 (17) 27.0
 
Jan. 21, 2021, 5 p.m. 6.8 ppb (7) 1.5 ppb (2) 8.0 ppb (8) 5.0 ppb (5) 6.4 ppb (7) 0.0 ppb (0) 31.0 ppb (29) 0.18 ppb (3) N/A 2.0 μg/m3 (9) 29.0
 
Jan. 21, 2021, 4 p.m. 6.2 ppb (6) 1.6 ppb (2) 7.1 ppb (7) 5.0 ppb (5) 5.4 ppb (6) 0.0 ppb (0) 32.0 ppb (30) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 30.0
 
Jan. 21, 2021, 3 p.m. 7.8 ppb (8) 1.9 ppb (2) 8.8 ppb (9) 6.0 ppb (6) 6.7 ppb (7) 0.0 ppb (0) 31.0 ppb (29) 0.17 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 21, 2021, 2 p.m. 9.8 ppb (10) 2.8 ppb (3) 10.9 ppb (11) 7.0 ppb (7) 7.9 ppb (8) 0.0 ppb (0) 30.0 ppb (28) 0.18 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 21, 2021, 1 p.m. 11.7 ppb (12) 2.2 ppb (3) 13.0 ppb (13) 10.0 ppb (10) 10.6 ppb (10) 0.0 ppb (0) 28.0 ppb (26) 0.2 ppb (3) N/A 5.0 μg/m3 (21) 26.0
 
Jan. 21, 2021, noon 19.4 ppb (19) 2.0 ppb (2) 20.7 ppb (20) 17.0 ppb (17) 18.2 ppb (18) 0.0 ppb (0) 21.0 ppb (20) 0.26 ppb (4) N/A 1.0 μg/m3 (5) 20.0
 
Jan. 21, 2021, 11 a.m. 9.8 ppb (10) 0.3 ppb (1) 11.9 ppb (12) 10.0 ppb (10) 11.0 ppb (11) 0.0 ppb (0) 28.0 ppb (26) 0.19 ppb (3) N/A 2.0 μg/m3 (9) 26.0
 
Jan. 21, 2021, 10 a.m. 4.1 ppb (4) 0.0 ppb (0) 5.1 ppb (5) 4.0 ppb (4) 5.0 ppb (5) 0.0 ppb (0) N/A 0.15 ppb (2) N/A 1.0 μg/m3 (5) 5.0
 
Jan. 21, 2021, 9 a.m. 3.7 ppb (4) 0.0 ppb (0) 4.6 ppb (5) 4.0 ppb (4) 4.5 ppb (5) 0.0 ppb (0) N/A 0.15 ppb (2) N/A 0.0 μg/m3 (0) 5.0
 
Jan. 21, 2021, 8 a.m. 2.9 ppb (3) 0.0 ppb (0) 3.6 ppb (4) 3.0 ppb (3) 3.6 ppb (4) 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 32.0
 
Jan. 21, 2021, 7 a.m. 2.2 ppb (3) 0.0 ppb (0) 3.0 ppb (3) 2.0 ppb (2) 3.0 ppb (3) 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) N/A 1.0 μg/m3 (5) 32.0
 
Jan. 21, 2021, 6 a.m. 1.8 ppb (2) 0.0 ppb (0) 2.5 ppb (3) 2.0 ppb (2) 2.4 ppb (3) 0.0 ppb (0) 35.0 ppb (33) 0.14 ppb (2) N/A 0.0 μg/m3 (0) 33.0
 
Jan. 21, 2021, 5 a.m. 2.5 ppb (3) 0.0 ppb (0) 3.2 ppb (4) 3.0 ppb (3) 3.1 ppb (3) 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) N/A 1.0 μg/m3 (5) 32.0
 
Jan. 21, 2021, 4 a.m. 1.9 ppb (2) 0.0 ppb (0) 2.7 ppb (3) 2.0 ppb (2) 2.6 ppb (3) 0.0 ppb (0) 34.0 ppb (32) 0.13 ppb (2) N/A 2.0 μg/m3 (9) 32.0
 
Jan. 21, 2021, 3 a.m. 1.3 ppb (2) 0.1 ppb (1) 2.1 ppb (2) 1.0 ppb (1) 1.9 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.16 ppb (3) N/A 2.0 μg/m3 (9) 34.0
 
Jan. 21, 2021, 2 a.m. 1.6 ppb (2) 0.1 ppb (1) 2.2 ppb (3) 2.0 ppb (2) 2.1 ppb (2) 0.0 ppb (0) 35.0 ppb (33) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 33.0
 
Jan. 21, 2021, 1 a.m. 2.3 ppb (3) 0.0 ppb (0) 3.0 ppb (3) 2.0 ppb (2) 2.9 ppb (3) 0.0 ppb (0) 34.0 ppb (32) 0.17 ppb (3) N/A 2.0 μg/m3 (9) 32.0
 
Jan. 21, 2021, midnight 2.2 ppb (3) 0.1 ppb (1) 2.9 ppb (3) 2.0 ppb (2) 2.7 ppb (3) 0.0 ppb (0) 33.0 ppb (31) 0.16 ppb (3) N/A 2.0 μg/m3 (9) 31.0
 
Jan. 20, 2021, 11 p.m. 2.3 ppb (3) 0.1 ppb (1) 3.1 ppb (3) 2.0 ppb (2) 2.9 ppb (3) 0.0 ppb (0) 33.0 ppb (31) 0.16 ppb (3) N/A 1.0 μg/m3 (5) 31.0
 
Jan. 20, 2021, 10 p.m. 2.9 ppb (3) 0.1 ppb (1) 3.7 ppb (4) 3.0 ppb (3) 3.5 ppb (4) 0.0 ppb (0) 33.0 ppb (31) 0.18 ppb (3) N/A 2.0 μg/m3 (9) 31.0
 
Jan. 20, 2021, 9 p.m. 3.9 ppb (4) 0.2 ppb (1) 4.7 ppb (5) 4.0 ppb (4) 4.4 ppb (5) 0.0 ppb (0) 32.0 ppb (30) 0.19 ppb (3) N/A 3.0 μg/m3 (13) 30.0
 
Jan. 20, 2021, 8 p.m. 2.8 ppb (3) 0.3 ppb (1) 3.6 ppb (4) 3.0 ppb (3) 3.3 ppb (4) 0.0 ppb (0) 32.0 ppb (30) 0.18 ppb (3) N/A 5.0 μg/m3 (21) 30.0
 
Jan. 20, 2021, 7 p.m. 3.7 ppb (4) 0.7 ppb (1) 4.6 ppb (5) 3.0 ppb (3) 3.9 ppb (4) 0.0 ppb (0) 31.0 ppb (29) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 29.0
 
Jan. 20, 2021, 6 p.m. 4.4 ppb (5) 1.0 ppb (1) 5.4 ppb (6) 3.0 ppb (3) 4.4 ppb (5) 0.0 ppb (0) 30.0 ppb (28) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 28.0
 
Jan. 20, 2021, 5 p.m. 4.7 ppb (5) 1.2 ppb (2) 5.7 ppb (6) 4.0 ppb (4) 4.4 ppb (5) 0.0 ppb (0) 31.0 ppb (29) 0.18 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 20, 2021, 4 p.m. 4.5 ppb (5) 1.2 ppb (2) 5.5 ppb (6) 3.0 ppb (3) 4.3 ppb (5) 0.0 ppb (0) 31.0 ppb (29) 0.18 ppb (3) N/A 5.0 μg/m3 (21) 29.0
 
Jan. 20, 2021, 3 p.m. 8.1 ppb (8) 1.6 ppb (2) 9.3 ppb (9) 7.0 ppb (7) 7.7 ppb (8) 0.0 ppb (0) 28.0 ppb (26) 0.2 ppb (3) N/A 6.0 μg/m3 (25) 26.0
 
Jan. 20, 2021, 2 p.m. 8.0 ppb (8) 0.7 ppb (1) 9.3 ppb (9) 7.0 ppb (7) 8.5 ppb (9) 0.0 ppb (0) 27.0 ppb (25) 0.21 ppb (3) N/A 3.0 μg/m3 (13) 25.0
 
Jan. 20, 2021, 1 p.m. 13.2 ppb (13) 1.6 ppb (2) 14.6 ppb (14) 12.0 ppb (12) 13.0 ppb (13) 0.0 ppb (0) 23.0 ppb (22) 0.24 ppb (3) N/A 3.0 μg/m3 (13) 22.0
 
Jan. 20, 2021, noon 11.0 ppb (11) 0.3 ppb (1) 12.2 ppb (12) 11.0 ppb (11) 11.8 ppb (12) 0.0 ppb (0) 23.0 ppb (22) 0.22 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 20, 2021, 11 a.m. 16.5 ppb (16) 0.2 ppb (1) 17.6 ppb (17) 16.0 ppb (16) 17.4 ppb (17) 0.0 ppb (0) 15.0 ppb (14) 0.26 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2021, 10 a.m. 19.9 ppb (19) 1.1 ppb (2) 19.7 ppb (19) 19.0 ppb (18) 18.8 ppb (18) 0.0 ppb (0) 11.0 ppb (11) 0.27 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 20, 2021, 9 a.m. 14.8 ppb (14) 0.7 ppb (1) 16.1 ppb (16) 14.0 ppb (14) 15.5 ppb (15) 0.0 ppb (0) 16.0 ppb (15) 0.23 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 20, 2021, 8 a.m. 13.5 ppb (13) 0.8 ppb (1) 14.6 ppb (14) 13.0 ppb (13) 13.6 ppb (13) 0.0 ppb (0) 17.0 ppb (16) 0.22 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 20, 2021, 7 a.m. 15.8 ppb (15) 0.9 ppb (1) 17.4 ppb (17) 15.0 ppb (15) 16.3 ppb (16) 0.0 ppb (0) 16.0 ppb (15) 0.23 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 20, 2021, 6 a.m. 14.2 ppb (14) 0.4 ppb (1) 15.8 ppb (15) 14.0 ppb (14) 15.3 ppb (15) 0.0 ppb (0) 16.0 ppb (15) 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2021, 5 a.m. 11.5 ppb (11) 0.2 ppb (1) 12.9 ppb (13) 11.0 ppb (11) 12.5 ppb (12) 0.0 ppb (0) 19.0 ppb (18) 0.25 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 20, 2021, 4 a.m. 10.0 ppb (10) 0.2 ppb (1) 11.4 ppb (11) 10.0 ppb (10) 11.1 ppb (11) 0.0 ppb (0) 21.0 ppb (20) 0.21 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
Jan. 20, 2021, 3 a.m. 14.3 ppb (14) 1.2 ppb (2) 15.6 ppb (15) 13.0 ppb (13) 14.2 ppb (14) 0.0 ppb (0) 19.0 ppb (18) 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 20, 2021, 2 a.m. 12.5 ppb (12) 0.4 ppb (1) 13.5 ppb (13) 12.0 ppb (12) 13.0 ppb (13) 0.0 ppb (0) 19.0 ppb (18) 0.26 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 20, 2021, 1 a.m. 15.4 ppb (15) 0.3 ppb (1) 16.5 ppb (16) 15.0 ppb (15) 16.1 ppb (16) 0.0 ppb (0) 13.0 ppb (13) 0.31 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 20, 2021, midnight 9.9 ppb (10) 0.1 ppb (1) 10.8 ppb (11) 10.0 ppb (10) 10.7 ppb (11) 0.0 ppb (0) 17.0 ppb (16) 0.25 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 19, 2021, 11 p.m. 7.2 ppb (7) 0.0 ppb (0) 8.1 ppb (8) 7.0 ppb (7) 8.0 ppb (8) 0.0 ppb (0) 20.0 ppb (19) 0.23 ppb (3) N/A 3.0 μg/m3 (13) 19.0
 
Jan. 19, 2021, 10 p.m. 4.3 ppb (5) 0.0 ppb (0) 5.1 ppb (5) 4.0 ppb (4) 5.0 ppb (5) 0.0 ppb (0) 24.0 ppb (23) 0.2 ppb (3) N/A 5.0 μg/m3 (21) 23.0
 
Jan. 19, 2021, 9 p.m. 5.3 ppb (5) 0.2 ppb (1) 6.1 ppb (6) 5.0 ppb (5) 5.9 ppb (6) 0.0 ppb (0) 26.0 ppb (25) 0.2 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
Jan. 19, 2021, 8 p.m. 2.5 ppb (3) 0.3 ppb (1) 3.3 ppb (4) 2.0 ppb (2) 2.9 ppb (3) 0.0 ppb (0) 31.0 ppb (29) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 29.0
 
Jan. 19, 2021, 7 p.m. 2.1 ppb (2) 0.5 ppb (1) 2.9 ppb (3) 2.0 ppb (2) 2.4 ppb (3) 0.0 ppb (0) 32.0 ppb (30) 0.17 ppb (3) N/A 2.0 μg/m3 (9) 30.0
 
Jan. 19, 2021, 6 p.m. 1.2 ppb (2) 0.5 ppb (1) 2.1 ppb (2) 1.0 ppb (1) 1.6 ppb (2) 0.0 ppb (0) 34.0 ppb (32) 0.16 ppb (3) N/A 2.0 μg/m3 (9) 32.0
 
Jan. 19, 2021, 5 p.m. 1.2 ppb (2) 0.5 ppb (1) 2.1 ppb (2) 1.0 ppb (1) 1.6 ppb (2) 0.0 ppb (0) 35.0 ppb (33) 0.16 ppb (3) N/A 2.0 μg/m3 (9) 33.0
 
Jan. 19, 2021, 4 p.m. 1.7 ppb (2) 0.7 ppb (1) 2.5 ppb (3) 1.0 ppb (1) 1.9 ppb (2) 0.0 ppb (0) 33.0 ppb (31) 0.16 ppb (3) N/A 4.0 μg/m3 (17) 31.0
 
Jan. 19, 2021, 3 p.m. 1.9 ppb (2) 0.8 ppb (1) 2.7 ppb (3) 1.0 ppb (1) 1.9 ppb (2) 0.0 ppb (0) 32.0 ppb (30) 0.16 ppb (3) N/A 6.0 μg/m3 (25) 30.0
 
Jan. 19, 2021, 2 p.m. 3.3 ppb (4) 1.1 ppb (2) 4.1 ppb (4) 2.0 ppb (2) 3.0 ppb (3) 0.0 ppb (0) 30.0 ppb (28) 0.18 ppb (3) N/A 6.0 μg/m3 (25) 28.0
 
Jan. 19, 2021, 1 p.m. 12.8 ppb (13) 2.6 ppb (3) 13.2 ppb (13) 10.0 ppb (10) 10.6 ppb (10) 0.0 ppb (0) 23.0 ppb (22) 0.24 ppb (3) N/A 3.0 μg/m3 (13) 22.0
 
Jan. 19, 2021, noon 16.3 ppb (16) 1.1 ppb (2) 15.9 ppb (15) 15.0 ppb (15) 14.8 ppb (14) 0.0 ppb (0) 19.0 ppb (18) 0.26 ppb (4) N/A 4.0 μg/m3 (17) 18.0
 
Jan. 19, 2021, 11 a.m. 14.5 ppb (14) 0.0 ppb (0) 14.8 ppb (14) 14.0 ppb (14) 14.7 ppb (14) 0.0 ppb (0) 20.0 ppb (19) 0.23 ppb (3) N/A 3.0 μg/m3 (13) 19.0
 
Jan. 19, 2021, 10 a.m. 7.0 ppb (7) 0.0 ppb (0) 7.3 ppb (7) 7.0 ppb (7) 7.3 ppb (7) 0.0 ppb (0) 27.0 ppb (25) 0.18 ppb (3) N/A -1.0 μg/m3 (0) 25.0
 
Jan. 19, 2021, 9 a.m. 3.6 ppb (4) 0.0 ppb (0) 4.1 ppb (4) 4.0 ppb (4) 4.0 ppb (4) 0.0 ppb (0) N/A 0.15 ppb (2) N/A 0.0 μg/m3 (0) 4.0
 
Jan. 19, 2021, 8 a.m. 3.0 ppb (3) 0.0 ppb (0) 3.4 ppb (4) 3.0 ppb (3) 3.4 ppb (4) 0.0 ppb (0) 31.0 ppb (29) 0.16 ppb (3) N/A -1.0 μg/m3 (0) 29.0
 
Jan. 19, 2021, 7 a.m. 2.3 ppb (3) 0.0 ppb (0) 2.8 ppb (3) 2.0 ppb (2) 2.7 ppb (3) 0.0 ppb (0) 32.0 ppb (30) 0.16 ppb (3) N/A 1.0 μg/m3 (5) 30.0
 
Jan. 19, 2021, 6 a.m. 2.2 ppb (3) 0.0 ppb (0) 2.6 ppb (3) 2.0 ppb (2) 2.6 ppb (3) 0.0 ppb (0) 33.0 ppb (31) 0.15 ppb (2) N/A 3.0 μg/m3 (13) 31.0
 
Jan. 19, 2021, 5 a.m. 1.7 ppb (2) 0.0 ppb (0) 2.1 ppb (2) 2.0 ppb (2) 2.0 ppb (2) 0.0 ppb (0) 33.0 ppb (31) 0.15 ppb (2) N/A 1.0 μg/m3 (5) 31.0
 
Jan. 19, 2021, 4 a.m. 1.5 ppb (2) 0.0 ppb (0) 1.8 ppb (2) 2.0 ppb (2) 1.7 ppb (2) 0.0 ppb (0) 33.0 ppb (31) 0.13 ppb (2) N/A 1.0 μg/m3 (5) 31.0
 
Jan. 19, 2021, 3 a.m. 1.8 ppb (2) 0.0 ppb (0) 1.8 ppb (2) 2.0 ppb (2) 1.7 ppb (2) 0.0 ppb (0) 33.0 ppb (31) 0.17 ppb (3) N/A 2.0 μg/m3 (9) 31.0
 
Jan. 19, 2021, 2 a.m. 1.4 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (32) 0.17 ppb (3) N/A 1.0 μg/m3 (5) 32.0
 
Jan. 19, 2021, 1 a.m. 1.8 ppb (2) 0.0 ppb (0) 2.5 ppb (3) 2.0 ppb (2) 2.5 ppb (3) 0.0 ppb (0) 31.0 ppb (29) 0.18 ppb (3) N/A 3.0 μg/m3 (13) 29.0
 
Jan. 19, 2021, midnight 3.8 ppb (4) 0.0 ppb (0) 4.6 ppb (5) 4.0 ppb (4) 4.5 ppb (5) 0.0 ppb (0) 27.0 ppb (25) 0.2 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 18, 2021, 11 p.m. 3.7 ppb (4) 0.0 ppb (0) 4.5 ppb (5) 4.0 ppb (4) 4.5 ppb (5) 0.0 ppb (0) 26.0 ppb (25) 0.2 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
Jan. 18, 2021, 10 p.m. 2.7 ppb (3) 0.0 ppb (0) 3.4 ppb (4) 3.0 ppb (3) 3.3 ppb (4) 0.0 ppb (0) 27.0 ppb (25) 0.19 ppb (3) N/A 3.0 μg/m3 (13) 25.0
 
Jan. 18, 2021, 9 p.m. 4.0 ppb (4) 0.2 ppb (1) 4.8 ppb (5) 4.0 ppb (4) 4.6 ppb (5) 0.0 ppb (0) 24.0 ppb (23) 0.21 ppb (3) N/A 5.0 μg/m3 (21) 23.0
 
Jan. 18, 2021, 8 p.m. 2.9 ppb (3) 0.4 ppb (1) 3.8 ppb (4) 3.0 ppb (3) 3.3 ppb (4) 0.0 ppb (0) 25.0 ppb (24) 0.19 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2021, 7 p.m. 3.1 ppb (3) 0.8 ppb (1) 4.0 ppb (4) 2.0 ppb (2) 3.2 ppb (4) 0.0 ppb (0) 25.0 ppb (24) 0.19 ppb (3) N/A 5.0 μg/m3 (21) 24.0
 
Jan. 18, 2021, 6 p.m. 2.5 ppb (3) 0.6 ppb (1) 3.4 ppb (4) 2.0 ppb (2) 2.7 ppb (3) 0.0 ppb (0) 26.0 ppb (25) 0.19 ppb (3) N/A 3.0 μg/m3 (13) 25.0
 
Jan. 18, 2021, 5 p.m. 2.7 ppb (3) 1.0 ppb (1) 3.7 ppb (4) 2.0 ppb (2) 2.6 ppb (3) 0.0 ppb (0) 27.0 ppb (25) 0.19 ppb (3) N/A 3.0 μg/m3 (13) 25.0
 
Jan. 18, 2021, 4 p.m. 4.3 ppb (5) 1.7 ppb (2) 5.5 ppb (6) 3.0 ppb (3) 3.7 ppb (4) 0.0 ppb (0) 27.0 ppb (25) 0.19 ppb (3) N/A 3.0 μg/m3 (13) 25.0
 
Jan. 18, 2021, 3 p.m. 5.4 ppb (6) 2.1 ppb (2) 6.6 ppb (7) 3.0 ppb (3) 4.4 ppb (5) 1.0 ppb (2) 25.0 ppb (24) 0.2 ppb (3) N/A 5.0 μg/m3 (21) 24.0
 
Jan. 18, 2021, 2 p.m. 10.4 ppb (10) 3.7 ppb (4) 12.0 ppb (12) 7.0 ppb (7) 8.0 ppb (8) 0.0 ppb (0) 22.0 ppb (21) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 18, 2021, 1 p.m. 13.4 ppb (13) 3.6 ppb (4) 15.0 ppb (15) 10.0 ppb (10) 11.1 ppb (11) 0.0 ppb (0) 20.0 ppb (19) 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
Jan. 18, 2021, noon 15.3 ppb (15) 2.6 ppb (3) 16.5 ppb (16) 13.0 ppb (13) 13.7 ppb (13) 0.0 ppb (0) 18.0 ppb (17) 0.24 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 18, 2021, 11 a.m. 14.0 ppb (14) 1.7 ppb (2) 15.2 ppb (15) 12.0 ppb (12) 13.5 ppb (13) 0.0 ppb (0) 19.0 ppb (18) 0.22 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 18, 2021, 10 a.m. 12.0 ppb (12) 0.8 ppb (1) 13.0 ppb (13) 11.0 ppb (11) 12.2 ppb (12) 0.0 ppb (0) 20.0 ppb (19) 0.21 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Jan. 18, 2021, 9 a.m. 11.1 ppb (11) 1.0 ppb (1) 12.0 ppb (12) 10.0 ppb (10) 10.9 ppb (11) 0.0 ppb (0) 21.0 ppb (20) 0.22 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
Jan. 18, 2021, 8 a.m. 9.2 ppb (9) 0.6 ppb (1) 10.1 ppb (10) 9.0 ppb (9) 9.5 ppb (9) 0.0 ppb (0) 20.0 ppb (19) 0.22 ppb (3) N/A 3.0 μg/m3 (13) 19.0
 
Jan. 18, 2021, 7 a.m. 10.3 ppb (10) 0.7 ppb (1) 11.2 ppb (11) 10.0 ppb (10) 10.6 ppb (10) 0.0 ppb (0) 20.0 ppb (19) 0.21 ppb (3) N/A 3.0 μg/m3 (13) 19.0
 
Jan. 18, 2021, 6 a.m. N/A N/A 10.1 ppb (10) N/A 8.9 ppb (9) N/A 23.0 ppb (22) N/A N/A 4.0 μg/m3 (17) 22.0
 
Jan. 18, 2021, 5 a.m. N/A N/A 10.9 ppb (11) N/A 9.8 ppb (10) N/A 22.0 ppb (21) N/A N/A 4.0 μg/m3 (17) 21.0
 
Jan. 18, 2021, 4 a.m. 9.9 ppb (10) 0.6 ppb (1) 10.8 ppb (11) 9.0 ppb (9) 10.2 ppb (10) 0.0 ppb (0) 21.0 ppb (20) 0.18 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
Jan. 18, 2021, 3 a.m. 8.9 ppb (9) 0.5 ppb (1) 9.9 ppb (10) 8.0 ppb (8) 9.3 ppb (9) 0.0 ppb (0) 24.0 ppb (23) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 23.0