ID: 1721

AQSQID: 230050029

Site Name: Portland - Deering Oaks

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

Updated: April 10, 2021, 11:43 a.m.

Location: Portland (Parkside), ME

Reporting: True, Located: True

Current AQI: 27.0

Portland (Parkside) ME, US: 43.660248, -70.268967

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 10, 2021, 10 a.m. 27.9 ppb (27) 10.9 ppb (11) N/A 17.0 ppb (17) N/A N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (25) 27.0
 
April 10, 2021, 9 a.m. 19.8 ppb (19) 3.5 ppb (4) N/A 16.0 ppb (16) N/A N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (25) 25.0
 
April 10, 2021, 8 a.m. 20.6 ppb (20) 0.2 ppb (1) N/A 20.0 ppb (19) N/A N/A 6.0 ppb (6) N/A N/A 8.0 μg/m3 (34) 34.0
 
April 10, 2021, 7 a.m. 21.9 ppb (21) 0.2 ppb (1) N/A 22.0 ppb (21) N/A N/A 7.0 ppb (7) N/A N/A 3.0 μg/m3 (13) 21.0
 
April 10, 2021, 6 a.m. 13.4 ppb (13) 0.2 ppb (1) N/A 13.0 ppb (13) N/A N/A 13.0 ppb (13) N/A N/A 4.0 μg/m3 (17) 17.0
 
April 10, 2021, 5 a.m. 5.2 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 27.0 ppb (25) N/A N/A 4.0 μg/m3 (17) 25.0
 
April 10, 2021, 4 a.m. 4.9 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 28.0 ppb (26) N/A N/A 5.0 μg/m3 (21) 26.0
 
April 10, 2021, 3 a.m. 5.6 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 29.0 ppb (27) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 10, 2021, 2 a.m. 3.4 ppb (4) 0.2 ppb (1) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) N/A N/A 4.0 μg/m3 (17) 30.0
 
April 10, 2021, 1 a.m. 2.2 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) N/A N/A 0.0 μg/m3 (0) 31.0
 
April 10, 2021, midnight 2.1 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) N/A N/A 2.0 μg/m3 (9) 32.0
 
April 9, 2021, 11 p.m. 3.1 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) N/A N/A 3.0 μg/m3 (13) 32.0
 
April 9, 2021, 10 p.m. 2.5 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) N/A N/A 0.0 μg/m3 (0) 34.0
 
April 9, 2021, 9 p.m. 2.7 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) N/A N/A 0.0 μg/m3 (0) 34.0
 
April 9, 2021, 8 p.m. 1.9 ppb (2) 0.5 ppb (1) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (35) N/A N/A 2.0 μg/m3 (9) 35.0
 
April 9, 2021, 7 p.m. 1.8 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) N/A N/A 3.0 μg/m3 (13) 36.0
 
April 9, 2021, 6 p.m. 1.9 ppb (2) 1.3 ppb (2) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (35) N/A N/A 3.0 μg/m3 (13) 35.0
 
April 9, 2021, 5 p.m. 2.7 ppb (3) 1.1 ppb (2) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (35) N/A N/A 5.0 μg/m3 (21) 35.0
 
April 9, 2021, 4 p.m. 2.6 ppb (3) 1.2 ppb (2) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) N/A N/A 4.0 μg/m3 (17) 34.0
 
April 9, 2021, 3 p.m. 3.0 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) N/A N/A 3.0 μg/m3 (13) 33.0
 
April 9, 2021, 2 p.m. 7.0 ppb (7) 2.4 ppb (3) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (29) N/A N/A 2.0 μg/m3 (9) 29.0
 
April 9, 2021, 1 p.m. 4.6 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) N/A N/A 2.0 μg/m3 (9) 30.0
 
April 9, 2021, noon 15.8 ppb (15) 6.1 ppb (6) N/A 10.0 ppb (10) N/A N/A 20.0 ppb (19) N/A N/A 3.0 μg/m3 (13) 19.0
 
April 9, 2021, 11 a.m. 54.1 ppb (52) 28.3 ppb (27) N/A 26.0 ppb (25) N/A N/A 6.0 ppb (6) N/A N/A 1.0 μg/m3 (5) 52.0
 
April 9, 2021, 10 a.m. 36.6 ppb (35) 20.0 ppb (19) N/A 17.0 ppb (17) N/A N/A 0.0 ppb (0) N/A N/A 2.0 μg/m3 (9) 35.0
 
April 9, 2021, 9 a.m. 32.5 ppb (31) 13.6 ppb (13) N/A 19.0 ppb (18) N/A N/A 0.0 ppb (0) N/A N/A 4.0 μg/m3 (17) 31.0
 
April 9, 2021, 8 a.m. 23.3 ppb (22) 4.4 ppb (5) N/A 19.0 ppb (18) N/A N/A 0.0 ppb (0) N/A N/A 5.0 μg/m3 (21) 22.0
 
April 9, 2021, 7 a.m. 9.5 ppb (9) 0.2 ppb (1) N/A 9.0 ppb (9) N/A N/A 11.0 ppb (11) N/A N/A 4.0 μg/m3 (17) 17.0
 
April 9, 2021, 6 a.m. 14.3 ppb (14) 1.8 ppb (2) N/A 13.0 ppb (13) N/A N/A 12.0 ppb (12) N/A N/A 22.0 μg/m3 (72) 72.0
 
April 9, 2021, 5 a.m. 15.1 ppb (15) 0.6 ppb (1) N/A 15.0 ppb (15) N/A N/A 14.0 ppb (13) N/A N/A 1.0 μg/m3 (5) 15.0
 
April 9, 2021, 4 a.m. 5.1 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 25.0 ppb (24) N/A N/A 1.0 μg/m3 (5) 24.0
 
April 9, 2021, 3 a.m. 6.7 ppb (7) 0.5 ppb (1) N/A 6.0 ppb (6) N/A N/A 26.0 ppb (25) N/A N/A 2.0 μg/m3 (9) 25.0
 
April 9, 2021, 2 a.m. 6.2 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 28.0 ppb (26) N/A N/A 3.0 μg/m3 (13) 26.0
 
April 9, 2021, 1 a.m. 7.1 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (7) N/A N/A 28.0 ppb (26) N/A N/A 1.0 μg/m3 (5) 26.0
 
April 9, 2021, midnight 7.6 ppb (8) 0.2 ppb (1) N/A 7.0 ppb (7) N/A N/A 29.0 ppb (27) N/A N/A 1.0 μg/m3 (5) 27.0
 
April 8, 2021, 11 p.m. 3.8 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (33) N/A N/A 2.0 μg/m3 (9) 33.0
 
April 8, 2021, 10 p.m. 3.1 ppb (3) 1.4 ppb (2) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (35) N/A N/A -1.0 μg/m3 (0) 35.0
 
April 8, 2021, 9 p.m. 3.3 ppb (4) 1.5 ppb (2) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) N/A N/A 0.0 μg/m3 (0) 36.0
 
April 8, 2021, 8 p.m. 3.0 ppb (3) 1.2 ppb (2) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) N/A N/A 2.0 μg/m3 (9) 36.0
 
April 8, 2021, 7 p.m. 4.3 ppb (5) 2.2 ppb (3) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (35) N/A N/A -1.0 μg/m3 (0) 35.0
 
April 8, 2021, 6 p.m. 2.9 ppb (3) 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (36) N/A N/A -3.0 μg/m3 (0) 36.0
 
April 8, 2021, 5 p.m. 3.3 ppb (4) 1.8 ppb (2) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) N/A N/A 0.0 μg/m3 (0) 36.0
 
April 8, 2021, 4 p.m. 4.3 ppb (5) 1.6 ppb (2) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (31) N/A N/A 3.0 μg/m3 (13) 31.0
 
April 8, 2021, 3 p.m. 4.6 ppb (5) 2.3 ppb (3) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) N/A N/A 6.0 μg/m3 (25) 30.0
 
April 8, 2021, 2 p.m. 11.1 ppb (11) 6.2 ppb (6) N/A 5.0 ppb (5) N/A N/A 29.0 ppb (27) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 8, 2021, 1 p.m. 7.5 ppb (8) 3.7 ppb (4) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (27) N/A N/A 2.0 μg/m3 (9) 27.0
 
April 8, 2021, noon 15.1 ppb (15) 5.2 ppb (5) N/A 10.0 ppb (10) N/A N/A 22.0 ppb (21) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 8, 2021, 11 a.m. 26.0 ppb (25) 9.8 ppb (10) N/A 16.0 ppb (16) N/A N/A 15.0 ppb (14) N/A N/A 5.0 μg/m3 (21) 25.0
 
April 8, 2021, 10 a.m. 44.0 ppb (42) 17.9 ppb (17) N/A 26.0 ppb (25) N/A N/A 1.0 ppb (1) N/A N/A 4.0 μg/m3 (17) 42.0
 
April 8, 2021, 9 a.m. 27.7 ppb (27) 5.4 ppb (6) N/A 22.0 ppb (21) N/A N/A 2.0 ppb (2) N/A N/A 0.0 μg/m3 (0) 27.0
 
April 8, 2021, 8 a.m. 16.9 ppb (16) 0.5 ppb (1) N/A 16.0 ppb (16) N/A N/A 9.0 ppb (9) N/A N/A -1.0 μg/m3 (0) 16.0
 
April 8, 2021, 7 a.m. 8.6 ppb (9) 0.1 ppb (1) N/A 8.0 ppb (8) N/A N/A 20.0 ppb (19) N/A N/A 1.0 μg/m3 (5) 19.0
 
April 8, 2021, 6 a.m. 3.3 ppb (4) 0.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (27) N/A N/A 1.0 μg/m3 (5) 27.0
 
April 8, 2021, 5 a.m. 6.1 ppb (6) 0.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 27.0 ppb (25) N/A N/A 1.0 μg/m3 (5) 25.0
 
April 8, 2021, 4 a.m. 9.3 ppb (9) 1.3 ppb (2) N/A 8.0 ppb (8) N/A N/A 21.0 ppb (20) N/A N/A 6.0 μg/m3 (25) 25.0
 
April 8, 2021, 3 a.m. 12.4 ppb (12) 0.5 ppb (1) N/A 12.0 ppb (12) N/A N/A 11.0 ppb (11) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 8, 2021, 2 a.m. 15.1 ppb (15) 0.4 ppb (1) N/A 15.0 ppb (15) N/A N/A 11.0 ppb (11) N/A N/A 3.0 μg/m3 (13) 15.0
 
April 8, 2021, 1 a.m. 8.5 ppb (9) 0.2 ppb (1) N/A 8.0 ppb (8) N/A N/A 21.0 ppb (20) N/A N/A 3.0 μg/m3 (13) 20.0
 
April 8, 2021, midnight 9.5 ppb (9) 0.0 ppb (0) N/A 10.0 ppb (10) N/A N/A 20.0 ppb (19) N/A N/A 2.0 μg/m3 (9) 19.0
 
April 7, 2021, 11 p.m. 6.2 ppb (6) 0.5 ppb (1) N/A 6.0 ppb (6) N/A N/A 26.0 ppb (25) N/A N/A 4.0 μg/m3 (17) 25.0
 
April 7, 2021, 10 p.m. 6.8 ppb (7) 0.5 ppb (1) N/A 6.0 ppb (6) N/A N/A 25.0 ppb (24) N/A N/A 2.0 μg/m3 (9) 24.0
 
April 7, 2021, 9 p.m. 11.5 ppb (11) 2.4 ppb (3) N/A 9.0 ppb (9) N/A N/A 27.0 ppb (25) N/A N/A 1.0 μg/m3 (5) 25.0
 
April 7, 2021, 8 p.m. 6.5 ppb (7) 2.2 ppb (3) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (30) N/A N/A 4.0 μg/m3 (17) 30.0
 
April 7, 2021, 7 p.m. 7.4 ppb (7) 2.9 ppb (3) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) N/A N/A 2.0 μg/m3 (9) 29.0
 
April 7, 2021, 6 p.m. 6.2 ppb (6) 1.9 ppb (2) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (29) N/A N/A 3.0 μg/m3 (13) 29.0
 
April 7, 2021, 5 p.m. 8.2 ppb (8) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A 29.0 ppb (27) N/A N/A 5.0 μg/m3 (21) 27.0
 
April 7, 2021, 4 p.m. 5.9 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (27) N/A N/A 1.0 μg/m3 (5) 27.0
 
April 7, 2021, 3 p.m. 6.1 ppb (6) 2.3 ppb (3) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (27) N/A N/A 2.0 μg/m3 (9) 27.0
 
April 7, 2021, 2 p.m. 7.1 ppb (7) 3.1 ppb (3) N/A 4.0 ppb (4) N/A N/A 28.0 ppb (26) N/A N/A 4.0 μg/m3 (17) 26.0
 
April 7, 2021, 1 p.m. 8.2 ppb (8) 3.9 ppb (4) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (25) N/A N/A 3.0 μg/m3 (13) 25.0
 
April 7, 2021, noon 9.5 ppb (9) 3.4 ppb (4) N/A 6.0 ppb (6) N/A N/A 24.0 ppb (23) N/A N/A 2.0 μg/m3 (9) 23.0
 
April 7, 2021, 11 a.m. 17.8 ppb (17) 4.5 ppb (5) N/A 13.0 ppb (13) N/A N/A 11.0 ppb (11) N/A N/A 3.0 μg/m3 (13) 17.0
 
April 7, 2021, 10 a.m. 11.6 ppb (11) 2.4 ppb (3) N/A 9.0 ppb (9) N/A N/A 14.0 ppb (13) N/A N/A 4.0 μg/m3 (17) 17.0
 
April 7, 2021, 9 a.m. 9.8 ppb (10) 0.2 ppb (1) N/A 10.0 ppb (10) N/A N/A N/A N/A N/A 1.0 μg/m3 (5) 10.0
 
April 7, 2021, 8 a.m. 5.7 ppb (6) 0.2 ppb (1) N/A 6.0 ppb (6) N/A N/A 19.0 ppb (18) N/A N/A 1.0 μg/m3 (5) 18.0
 
April 7, 2021, 7 a.m. 5.6 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 17.0 ppb (16) N/A N/A 1.0 μg/m3 (5) 16.0
 
April 7, 2021, 6 a.m. 3.7 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 20.0 ppb (19) N/A N/A 1.0 μg/m3 (5) 19.0
 
April 7, 2021, 5 a.m. 6.6 ppb (7) 1.3 ppb (2) N/A 5.0 ppb (5) N/A N/A 22.0 ppb (21) N/A N/A 1.0 μg/m3 (5) 21.0
 
April 7, 2021, 4 a.m. 4.1 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 24.0 ppb (23) N/A N/A 5.0 μg/m3 (21) 23.0
 
April 7, 2021, 3 a.m. 9.5 ppb (9) 2.7 ppb (3) N/A 7.0 ppb (7) N/A N/A 22.0 ppb (21) N/A N/A 8.0 μg/m3 (34) 34.0
 
April 7, 2021, 2 a.m. 4.9 ppb (5) 0.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 23.0 ppb (22) N/A N/A 2.0 μg/m3 (9) 22.0
 
April 7, 2021, 1 a.m. 6.6 ppb (7) 0.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 22.0 ppb (21) N/A N/A 2.0 μg/m3 (9) 21.0
 
April 7, 2021, midnight 7.2 ppb (7) 1.1 ppb (2) N/A 6.0 ppb (6) N/A N/A 22.0 ppb (21) N/A N/A 2.0 μg/m3 (9) 21.0
 
April 6, 2021, 11 p.m. 7.9 ppb (8) 2.1 ppb (2) N/A 6.0 ppb (6) N/A N/A 23.0 ppb (22) N/A N/A 4.0 μg/m3 (17) 22.0
 
April 6, 2021, 10 p.m. 5.0 ppb (5) 1.8 ppb (2) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (25) N/A N/A 3.0 μg/m3 (13) 25.0
 
April 6, 2021, 9 p.m. 4.5 ppb (5) 2.0 ppb (2) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (27) N/A N/A 2.0 μg/m3 (9) 27.0
 
April 6, 2021, 8 p.m. 5.0 ppb (5) 2.3 ppb (3) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (29) N/A N/A 1.0 μg/m3 (5) 29.0
 
April 6, 2021, 7 p.m. 3.4 ppb (4) 1.1 ppb (2) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) N/A N/A 3.0 μg/m3 (13) 30.0
 
April 6, 2021, 6 p.m. 4.3 ppb (5) 1.6 ppb (2) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (31) N/A N/A 5.0 μg/m3 (21) 31.0
 
April 6, 2021, 5 p.m. 3.0 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) N/A N/A 2.0 μg/m3 (9) 30.0
 
April 6, 2021, 4 p.m. 3.5 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) N/A N/A 2.0 μg/m3 (9) 30.0
 
April 6, 2021, 3 p.m. 5.2 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 30.0 ppb (28) N/A N/A -1.0 μg/m3 (0) 28.0
 
April 6, 2021, 2 p.m. 5.1 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (27) N/A N/A -1.0 μg/m3 (0) 27.0
 
April 6, 2021, 1 p.m. 8.3 ppb (8) 2.9 ppb (3) N/A 5.0 ppb (5) N/A N/A 27.0 ppb (25) N/A N/A 1.0 μg/m3 (5) 25.0
 
April 6, 2021, noon 6.5 ppb (7) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A 27.0 ppb (25) N/A N/A 2.0 μg/m3 (9) 25.0
 
April 6, 2021, 11 a.m. 24.3 ppb (23) 12.7 ppb (12) N/A 12.0 ppb (12) N/A N/A 24.0 ppb (23) N/A N/A 2.0 μg/m3 (9) 23.0
 
April 6, 2021, 10 a.m. 6.7 ppb (7) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 25.0 ppb (24) N/A N/A 0.0 μg/m3 (0) 24.0
 
April 6, 2021, 9 a.m. 3.4 ppb (4) 0.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (27) N/A N/A -1.0 μg/m3 (0) 27.0
 
April 6, 2021, 8 a.m. 1.8 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (29) N/A N/A 0.0 μg/m3 (0) 29.0
 
April 6, 2021, 7 a.m. 4.1 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (28) N/A N/A 1.0 μg/m3 (5) 28.0
 
April 6, 2021, 6 a.m. 4.3 ppb (5) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (29) N/A N/A 2.0 μg/m3 (9) 29.0
 
April 6, 2021, 5 a.m. 4.0 ppb (4) 1.3 ppb (2) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (29) N/A N/A 1.0 μg/m3 (5) 29.0
 
April 6, 2021, 4 a.m. 3.6 ppb (4) 1.4 ppb (2) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) N/A N/A 0.0 μg/m3 (0) 31.0
 
April 6, 2021, 3 a.m. 5.2 ppb (5) 3.0 ppb (3) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) N/A N/A 0.0 μg/m3 (0) 32.0
 
April 6, 2021, 2 a.m. 3.4 ppb (4) 1.1 ppb (2) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) N/A N/A 1.0 μg/m3 (5) 33.0
 
April 6, 2021, 1 a.m. 3.7 ppb (4) 1.6 ppb (2) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) N/A N/A 3.0 μg/m3 (13) 33.0
 
April 6, 2021, midnight 6.0 ppb (6) 2.6 ppb (3) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (33) N/A N/A 3.0 μg/m3 (13) 33.0
 
April 5, 2021, 11 p.m. 32.3 ppb (31) 21.9 ppb (21) N/A 10.0 ppb (10) N/A N/A 31.0 ppb (29) N/A N/A 3.0 μg/m3 (13) 31.0
 
April 5, 2021, 10 p.m. 8.3 ppb (8) 3.8 ppb (4) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (32) N/A N/A -1.0 μg/m3 (0) 32.0
 
April 5, 2021, 9 p.m. 2.6 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) N/A N/A -2.0 μg/m3 (0) 31.0
 
April 5, 2021, 8 p.m. 3.1 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) N/A N/A 2.0 μg/m3 (9) 31.0
 
April 5, 2021, 7 p.m. 3.6 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) N/A N/A 4.0 μg/m3 (17) 30.0
 
April 5, 2021, 6 p.m. 3.8 ppb (4) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) N/A N/A 1.0 μg/m3 (5) 30.0
 
April 5, 2021, 5 p.m. 4.3 ppb (5) 1.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (29) N/A N/A 2.0 μg/m3 (9) 29.0
 
April 5, 2021, 4 p.m. 4.5 ppb (5) 1.1 ppb (2) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) N/A N/A 3.0 μg/m3 (13) 30.0
 
April 5, 2021, 3 p.m. 4.1 ppb (4) 1.1 ppb (2) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (32) N/A N/A N/A 32.0
 
April 5, 2021, 2 p.m. 3.5 ppb (4) 1.1 ppb (2) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) N/A N/A 1.0 μg/m3 (5) 33.0
 
April 5, 2021, 1 p.m. 7.6 ppb (8) 3.6 ppb (4) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (33) N/A N/A 0.0 μg/m3 (0) 33.0
 
April 5, 2021, noon 4.8 ppb (5) 1.1 ppb (2) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (32) N/A N/A 2.0 μg/m3 (9) 32.0
 
April 5, 2021, 11 a.m. 4.9 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (32) N/A N/A 2.0 μg/m3 (9) 32.0
 
April 5, 2021, 10 a.m. 3.5 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (34) N/A N/A 2.0 μg/m3 (9) 34.0
 
April 5, 2021, 9 a.m. 2.0 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (35) N/A N/A 2.0 μg/m3 (9) 35.0
 
April 5, 2021, 8 a.m. 1.9 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) N/A N/A 2.0 μg/m3 (9) 36.0
 
April 5, 2021, 7 a.m. 1.4 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
April 5, 2021, 6 a.m. 4.0 ppb (4) 1.3 ppb (2) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (39) N/A N/A 4.0 μg/m3 (17) 39.0
 
April 5, 2021, 5 a.m. 3.8 ppb (4) 1.9 ppb (2) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) N/A N/A 4.0 μg/m3 (17) 40.0
 
April 5, 2021, 4 a.m. 3.5 ppb (4) 1.2 ppb (2) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) N/A N/A 5.0 μg/m3 (21) 39.0
 
April 5, 2021, 3 a.m. 2.9 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) N/A N/A 4.0 μg/m3 (17) 40.0
 
April 5, 2021, 2 a.m. 3.1 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) N/A N/A 5.0 μg/m3 (21) 40.0
 
April 5, 2021, 1 a.m. 3.5 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) N/A N/A 5.0 μg/m3 (21) 40.0
 
April 5, 2021, midnight 3.9 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (42) N/A N/A 2.0 μg/m3 (9) 42.0
 
April 4, 2021, 11 p.m. 4.3 ppb (5) 1.5 ppb (2) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (44) N/A N/A 6.0 μg/m3 (25) 44.0
 
April 4, 2021, 10 p.m. 2.0 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (44) N/A N/A 7.0 μg/m3 (30) 44.0
 
April 4, 2021, 9 p.m. 2.1 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (44) N/A N/A 2.0 μg/m3 (9) 44.0
 
April 4, 2021, 8 p.m. 1.9 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) N/A N/A 4.0 μg/m3 (17) 43.0
 
April 4, 2021, 7 p.m. 1.9 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) N/A N/A 6.0 μg/m3 (25) 41.0
 
April 4, 2021, 6 p.m. 1.6 ppb (2) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (39) N/A N/A 5.0 μg/m3 (21) 39.0
 
April 4, 2021, 5 p.m. 1.7 ppb (2) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) N/A N/A -1.0 μg/m3 (0) 38.0
 
April 4, 2021, 4 p.m. 2.2 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) N/A N/A -1.0 μg/m3 (0) 38.0
 
April 4, 2021, 3 p.m. 1.8 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (38) N/A N/A 0.0 μg/m3 (0) 38.0
 
April 4, 2021, 2 p.m. 3.0 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) N/A N/A 3.0 μg/m3 (13) 36.0
 
April 4, 2021, 1 p.m. 3.2 ppb (4) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) N/A N/A 5.0 μg/m3 (21) 32.0
 
April 4, 2021, noon 9.7 ppb (10) 3.1 ppb (3) N/A 7.0 ppb (7) N/A N/A 24.0 ppb (23) N/A N/A 2.0 μg/m3 (9) 23.0
 
April 4, 2021, 11 a.m. 16.3 ppb (16) 3.9 ppb (4) N/A 12.0 ppb (12) N/A N/A 15.0 ppb (14) N/A N/A 3.0 μg/m3 (13) 16.0
 
April 4, 2021, 10 a.m. 20.3 ppb (20) 1.6 ppb (2) N/A 19.0 ppb (18) N/A N/A 7.0 ppb (7) N/A N/A 5.0 μg/m3 (21) 21.0
 
April 4, 2021, 9 a.m. 21.0 ppb (20) 0.3 ppb (1) N/A 21.0 ppb (20) N/A N/A 7.0 ppb (7) N/A N/A 5.0 μg/m3 (21) 21.0
 
April 4, 2021, 8 a.m. 11.8 ppb (12) 0.0 ppb (0) N/A 12.0 ppb (12) N/A N/A 17.0 ppb (16) N/A N/A 8.0 μg/m3 (34) 34.0
 
April 4, 2021, 7 a.m. 20.1 ppb (19) 0.2 ppb (1) N/A 20.0 ppb (19) N/A N/A 10.0 ppb (10) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 4, 2021, 6 a.m. 22.1 ppb (21) 0.0 ppb (0) N/A 22.0 ppb (21) N/A N/A 10.0 ppb (10) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 4, 2021, 5 a.m. 20.6 ppb (20) 0.1 ppb (1) N/A 20.0 ppb (19) N/A N/A 12.0 ppb (12) N/A N/A 7.0 μg/m3 (30) 30.0
 
April 4, 2021, 4 a.m. 10.3 ppb (10) 0.0 ppb (0) N/A 10.0 ppb (10) N/A N/A 25.0 ppb (24) N/A N/A 6.0 μg/m3 (25) 25.0
 
April 4, 2021, 3 a.m. 9.7 ppb (10) 0.0 ppb (0) N/A 10.0 ppb (10) N/A N/A 27.0 ppb (25) N/A N/A 6.0 μg/m3 (25) 25.0
 
April 4, 2021, 2 a.m. 6.2 ppb (6) 0.2 ppb (1) N/A 6.0 ppb (6) N/A N/A 33.0 ppb (31) N/A N/A 7.0 μg/m3 (30) 31.0
 
April 4, 2021, 1 a.m. 6.1 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
April 4, 2021, midnight 7.4 ppb (7) 0.2 ppb (1) N/A 7.0 ppb (7) N/A N/A 34.0 ppb (32) N/A N/A 5.0 μg/m3 (21) 32.0
 
April 3, 2021, 11 p.m. 6.4 ppb (7) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 36.0 ppb (34) N/A N/A 3.0 μg/m3 (13) 34.0
 
April 3, 2021, 10 p.m. 4.5 ppb (5) 0.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (37) N/A N/A 2.0 μg/m3 (9) 37.0
 
April 3, 2021, 9 p.m. 4.0 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
April 3, 2021, 8 p.m. 1.9 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) N/A N/A 4.0 μg/m3 (17) 40.0
 
April 3, 2021, 7 p.m. 1.3 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (41) N/A N/A -1.0 μg/m3 (0) 41.0
 
April 3, 2021, 6 p.m. 1.7 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (42) N/A N/A 2.0 μg/m3 (9) 42.0
 
April 3, 2021, 5 p.m. 1.2 ppb (2) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (41) N/A N/A 3.0 μg/m3 (13) 41.0
 
April 3, 2021, 4 p.m. 1.4 ppb (2) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) N/A N/A 2.0 μg/m3 (9) 40.0
 
April 3, 2021, 3 p.m. 1.8 ppb (2) 0.4 ppb (1) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (38) N/A N/A 2.0 μg/m3 (9) 38.0
 
April 3, 2021, 2 p.m. 2.2 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) N/A N/A 1.0 μg/m3 (5) 38.0
 
April 3, 2021, 1 p.m. 4.1 ppb (4) 1.1 ppb (2) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (33) N/A N/A 1.0 μg/m3 (5) 33.0
 
April 3, 2021, noon 10.9 ppb (11) 3.2 ppb (4) N/A 8.0 ppb (8) N/A N/A 29.0 ppb (27) N/A N/A 2.0 μg/m3 (9) 27.0
 
April 3, 2021, 11 a.m. 17.1 ppb (17) 3.6 ppb (4) N/A 13.0 ppb (13) N/A N/A 21.0 ppb (20) N/A N/A 5.0 μg/m3 (21) 21.0