ID: 1249

AQSQID: 330150014

Site Name: Portsmouth

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

Updated: Sept. 22, 2021, noon

Location: Portsmouth (Downtown), NH

Reporting: True, Located: True

Current AQI: 28.0

Portsmouth (Downtown) NH, US: 43.075371, -70.748017

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Sept. 15, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 33.0 ppb (31) N/A 12.0 μg/m3 (12) 6.6 μg/m3 (28) 31.0
 
Sept. 15, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A 12.0 μg/m3 (12) 6.4 μg/m3 (27) 27.0
 
Sept. 15, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 34.0 ppb (32) N/A 12.0 μg/m3 (12) 5.9 μg/m3 (25) 32.0
 
Sept. 15, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 33.0 ppb (31) N/A 11.0 μg/m3 (11) 5.4 μg/m3 (23) 31.0
 
Sept. 15, 2021, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 32.0 ppb (30) N/A 11.0 μg/m3 (11) 5.3 μg/m3 (23) 30.0
 
Sept. 15, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (30) N/A 12.0 μg/m3 (12) 5.0 μg/m3 (21) 30.0
 
Sept. 15, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A 12.0 μg/m3 (12) 4.8 μg/m3 (20) 29.0
 
Sept. 15, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 29.0 ppb (27) N/A 12.0 μg/m3 (12) 4.7 μg/m3 (20) 27.0
 
Sept. 15, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 30.0 ppb (28) N/A 12.0 μg/m3 (12) 4.6 μg/m3 (20) 28.0
 
Sept. 15, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A 12.0 μg/m3 (12) 4.0 μg/m3 (17) 29.0
 
Sept. 15, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) 33.0 ppb (31) N/A 11.0 μg/m3 (11) 3.5 μg/m3 (15) 31.0
 
Sept. 14, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 33.0 ppb (31) N/A 8.0 μg/m3 (8) 3.3 μg/m3 (14) 31.0
 
Sept. 14, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 34.0 ppb (32) N/A 12.0 μg/m3 (12) 3.4 μg/m3 (15) 32.0
 
Sept. 14, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 33.0 ppb (31) N/A 17.0 μg/m3 (16) 3.4 μg/m3 (15) 31.0
 
Sept. 14, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 32.0 ppb (30) N/A 17.0 μg/m3 (16) 3.8 μg/m3 (16) 30.0
 
Sept. 14, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 32.0 ppb (30) N/A 12.0 μg/m3 (12) 3.6 μg/m3 (16) 30.0
 
Sept. 14, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 32.0 ppb (30) N/A 13.0 μg/m3 (13) 3.5 μg/m3 (15) 30.0
 
Sept. 14, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 32.0 ppb (30) N/A 11.0 μg/m3 (11) 3.4 μg/m3 (15) 30.0
 
Sept. 14, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 30.0 ppb (28) N/A 12.0 μg/m3 (12) 3.5 μg/m3 (15) 28.0
 
Sept. 14, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 28.0 ppb (26) N/A 36.0 μg/m3 (34) 11.5 μg/m3 (48) 48.0
 
Sept. 14, 2021, 2 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 23.0 ppb (22) N/A 39.0 μg/m3 (37) 12.1 μg/m3 (51) 51.0
 
Sept. 14, 2021, 1 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 12.0 ppb (12) N/A 19.0 μg/m3 (18) 5.4 μg/m3 (23) 23.0
 
Sept. 14, 2021, noon N/A N/A N/A N/A N/A 3.0 ppb (5) 8.0 ppb (8) N/A 31.0 μg/m3 (29) 6.9 μg/m3 (29) 29.0
 
Sept. 14, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 4.0 ppb (4) N/A 44.0 μg/m3 (41) 6.7 μg/m3 (28) 41.0
 
Sept. 14, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 2.0 ppb (2) N/A 18.0 μg/m3 (17) 6.2 μg/m3 (26) 26.0
 
Sept. 14, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 4.0 ppb (4) N/A 17.0 μg/m3 (16) 6.1 μg/m3 (26) 26.0
 
Sept. 14, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 6.0 ppb (6) N/A 20.0 μg/m3 (19) 6.1 μg/m3 (26) 26.0
 
Sept. 14, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 8.0 ppb (8) N/A 20.0 μg/m3 (19) 6.1 μg/m3 (26) 26.0
 
Sept. 14, 2021, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 7.0 ppb (7) N/A 19.0 μg/m3 (18) 6.2 μg/m3 (26) 26.0
 
Sept. 14, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 5.0 ppb (5) N/A 15.0 μg/m3 (14) 5.5 μg/m3 (23) 23.0
 
Sept. 14, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 9.0 ppb (9) N/A 12.0 μg/m3 (12) 5.2 μg/m3 (22) 22.0
 
Sept. 14, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 12.0 ppb (12) N/A 17.0 μg/m3 (16) 6.2 μg/m3 (26) 26.0
 
Sept. 14, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 7.0 ppb (7) N/A 14.0 μg/m3 (13) 6.2 μg/m3 (26) 26.0
 
Sept. 14, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 8.0 ppb (8) N/A 13.0 μg/m3 (13) 5.7 μg/m3 (24) 24.0
 
Sept. 14, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) 14.0 ppb (13) N/A 15.0 μg/m3 (14) 5.8 μg/m3 (25) 25.0
 
Sept. 13, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 12.0 ppb (12) N/A 15.0 μg/m3 (14) 5.5 μg/m3 (23) 23.0
 
Sept. 13, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 20.0 ppb (19) N/A 12.0 μg/m3 (12) 5.2 μg/m3 (22) 22.0
 
Sept. 13, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 27.0 ppb (25) N/A 15.0 μg/m3 (14) 5.3 μg/m3 (23) 25.0
 
Sept. 13, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 27.0 ppb (25) N/A 15.0 μg/m3 (14) 4.9 μg/m3 (21) 25.0
 
Sept. 13, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 28.0 ppb (26) N/A 30.0 μg/m3 (28) 5.2 μg/m3 (22) 28.0
 
Sept. 13, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 26.0 ppb (25) N/A 23.0 μg/m3 (22) 5.1 μg/m3 (22) 25.0
 
Sept. 13, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 25.0 ppb (24) N/A 32.0 μg/m3 (30) 6.1 μg/m3 (26) 30.0
 
Sept. 13, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 25.0 ppb (24) N/A 15.0 μg/m3 (14) 6.9 μg/m3 (29) 29.0
 
Sept. 13, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 29.0 ppb (27) N/A 16.0 μg/m3 (15) 8.6 μg/m3 (36) 36.0
 
Sept. 13, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 26.0 ppb (25) N/A 18.0 μg/m3 (17) 10.1 μg/m3 (43) 43.0
 
Sept. 13, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 23.0 ppb (22) N/A 17.0 μg/m3 (16) 9.5 μg/m3 (40) 40.0
 
Sept. 13, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) 19.0 ppb (18) N/A 16.0 μg/m3 (15) 9.4 μg/m3 (40) 40.0
 
Sept. 13, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 24.0 ppb (23) N/A 24.0 μg/m3 (23) 12.6 μg/m3 (53) 53.0
 
Sept. 13, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 18.0 ppb (17) N/A 25.0 μg/m3 (24) 13.0 μg/m3 (53) 53.0
 
Sept. 13, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 15.0 ppb (14) N/A 19.0 μg/m3 (18) 11.1 μg/m3 (47) 47.0
 
Sept. 13, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 18.0 ppb (17) N/A 20.0 μg/m3 (19) 11.4 μg/m3 (48) 48.0
 
Sept. 13, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 22.0 ppb (21) N/A 22.0 μg/m3 (21) 11.9 μg/m3 (50) 50.0
 
Sept. 13, 2021, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 27.0 ppb (25) N/A 20.0 μg/m3 (19) 10.6 μg/m3 (45) 45.0
 
Sept. 13, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 30.0 ppb (28) N/A 18.0 μg/m3 (17) 10.4 μg/m3 (44) 44.0
 
Sept. 13, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A 17.0 μg/m3 (16) 10.3 μg/m3 (43) 43.0
 
Sept. 13, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A 18.0 μg/m3 (17) 10.4 μg/m3 (44) 44.0
 
Sept. 13, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A 18.0 μg/m3 (17) 10.3 μg/m3 (43) 43.0
 
Sept. 13, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 32.0 ppb (30) N/A 18.0 μg/m3 (17) 10.0 μg/m3 (42) 42.0
 
Sept. 13, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) 32.0 ppb (30) N/A 19.0 μg/m3 (18) 10.1 μg/m3 (43) 43.0
 
Sept. 12, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 34.0 ppb (32) N/A 20.0 μg/m3 (19) 10.2 μg/m3 (43) 43.0
 
Sept. 12, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 36.0 ppb (34) N/A 24.0 μg/m3 (23) 10.4 μg/m3 (44) 44.0
 
Sept. 12, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 38.0 ppb (36) N/A 23.0 μg/m3 (22) 10.0 μg/m3 (42) 42.0
 
Sept. 12, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A 21.0 μg/m3 (20) 9.4 μg/m3 (40) 40.0
 
Sept. 12, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 43.0 ppb (40) N/A 22.0 μg/m3 (21) 9.1 μg/m3 (38) 40.0
 
Sept. 12, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A 21.0 μg/m3 (20) 8.6 μg/m3 (36) 40.0
 
Sept. 12, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A 17.0 μg/m3 (16) 7.8 μg/m3 (33) 38.0
 
Sept. 12, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A 17.0 μg/m3 (16) 7.4 μg/m3 (31) 37.0
 
Sept. 12, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 37.0 ppb (35) N/A 17.0 μg/m3 (16) 7.1 μg/m3 (30) 35.0
 
Sept. 12, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 34.0 ppb (32) N/A 14.0 μg/m3 (13) 7.2 μg/m3 (31) 32.0
 
Sept. 12, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 32.0 ppb (30) N/A 14.0 μg/m3 (13) 7.3 μg/m3 (31) 31.0
 
Sept. 12, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) 29.0 ppb (27) N/A 13.0 μg/m3 (13) 7.5 μg/m3 (32) 32.0
 
Sept. 12, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 28.0 ppb (26) N/A 14.0 μg/m3 (13) 7.6 μg/m3 (32) 32.0
 
Sept. 12, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 28.0 ppb (26) N/A 13.0 μg/m3 (13) 7.3 μg/m3 (31) 31.0
 
Sept. 12, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 29.0 ppb (27) N/A 12.0 μg/m3 (12) 7.2 μg/m3 (31) 31.0
 
Sept. 12, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A 12.0 μg/m3 (12) 7.4 μg/m3 (31) 31.0
 
Sept. 12, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 32.0 ppb (30) N/A 12.0 μg/m3 (12) 7.4 μg/m3 (31) 31.0
 
Sept. 12, 2021, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 33.0 ppb (31) N/A 12.0 μg/m3 (12) 7.4 μg/m3 (31) 31.0
 
Sept. 12, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 33.0 ppb (31) N/A 13.0 μg/m3 (13) 7.5 μg/m3 (32) 32.0
 
Sept. 12, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 36.0 ppb (34) N/A 12.0 μg/m3 (12) 7.6 μg/m3 (32) 34.0
 
Sept. 12, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 37.0 ppb (35) N/A 12.0 μg/m3 (12) 7.7 μg/m3 (33) 35.0
 
Sept. 12, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 34.0 ppb (32) N/A 13.0 μg/m3 (13) 7.5 μg/m3 (32) 32.0
 
Sept. 12, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 29.0 ppb (27) N/A 13.0 μg/m3 (13) 7.0 μg/m3 (30) 30.0
 
Sept. 12, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A 15.0 μg/m3 (14) 6.6 μg/m3 (28) 29.0
 
Sept. 11, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 32.0 ppb (30) N/A 13.0 μg/m3 (13) 6.0 μg/m3 (25) 30.0
 
Sept. 11, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 35.0 ppb (33) N/A 14.0 μg/m3 (13) 5.3 μg/m3 (23) 33.0
 
Sept. 11, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 36.0 ppb (34) N/A 13.0 μg/m3 (13) 5.0 μg/m3 (21) 34.0
 
Sept. 11, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 37.0 ppb (35) N/A 17.0 μg/m3 (16) 4.9 μg/m3 (21) 35.0
 
Sept. 11, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 36.0 ppb (34) N/A 12.0 μg/m3 (12) 4.5 μg/m3 (19) 34.0
 
Sept. 11, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 35.0 ppb (33) N/A 9.0 μg/m3 (9) 4.2 μg/m3 (18) 33.0
 
Sept. 11, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 33.0 ppb (31) N/A 12.0 μg/m3 (12) 4.2 μg/m3 (18) 31.0
 
Sept. 11, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A 10.0 μg/m3 (10) 4.1 μg/m3 (18) 29.0
 
Sept. 11, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 29.0 ppb (27) N/A 11.0 μg/m3 (11) 4.1 μg/m3 (18) 27.0
 
Sept. 11, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 26.0 ppb (25) N/A 11.0 μg/m3 (11) 4.2 μg/m3 (18) 25.0
 
Sept. 11, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 22.0 ppb (21) N/A 12.0 μg/m3 (12) 4.4 μg/m3 (19) 21.0
 
Sept. 11, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) 19.0 ppb (18) N/A 13.0 μg/m3 (13) 4.8 μg/m3 (20) 20.0
 
Sept. 11, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 14.0 ppb (13) N/A 12.0 μg/m3 (12) 4.9 μg/m3 (21) 21.0
 
Sept. 11, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 14.0 ppb (13) N/A 11.0 μg/m3 (11) 4.9 μg/m3 (21) 21.0
 
Sept. 11, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A 11.0 μg/m3 (11) 5.0 μg/m3 (21) 21.0
 
Sept. 11, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 17.0 ppb (16) N/A 12.0 μg/m3 (12) 4.5 μg/m3 (19) 19.0
 
Sept. 11, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 18.0 ppb (17) N/A 10.0 μg/m3 (10) 4.3 μg/m3 (18) 18.0
 
Sept. 11, 2021, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 18.0 ppb (17) N/A 9.0 μg/m3 (9) 4.0 μg/m3 (17) 17.0
 
Sept. 11, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (17) N/A 9.0 μg/m3 (9) 3.7 μg/m3 (16) 17.0
 
Sept. 11, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 19.0 ppb (18) N/A 8.0 μg/m3 (8) 3.6 μg/m3 (16) 18.0
 
Sept. 11, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 20.0 ppb (19) N/A 8.0 μg/m3 (8) 3.5 μg/m3 (15) 19.0
 
Sept. 11, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 19.0 ppb (18) N/A 9.0 μg/m3 (9) 3.8 μg/m3 (16) 18.0
 
Sept. 11, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 20.0 ppb (19) N/A 9.0 μg/m3 (9) 3.6 μg/m3 (16) 19.0
 
Sept. 11, 2021, midnight N/A N/A N/A N/A N/A 2.0 ppb (3) 18.0 ppb (17) N/A 10.0 μg/m3 (10) 3.2 μg/m3 (14) 17.0
 
Sept. 10, 2021, 11 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 16.0 ppb (15) N/A 13.0 μg/m3 (13) 3.3 μg/m3 (14) 15.0
 
Sept. 10, 2021, 10 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 19.0 ppb (18) N/A 19.0 μg/m3 (18) 3.5 μg/m3 (15) 18.0
 
Sept. 10, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 23.0 ppb (22) N/A 17.0 μg/m3 (16) 3.4 μg/m3 (15) 22.0
 
Sept. 10, 2021, 8 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 23.0 ppb (22) N/A 19.0 μg/m3 (18) 3.6 μg/m3 (16) 22.0
 
Sept. 10, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 25.0 ppb (24) N/A 42.0 μg/m3 (39) 4.4 μg/m3 (19) 39.0
 
Sept. 10, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 25.0 ppb (24) N/A 45.0 μg/m3 (42) 5.6 μg/m3 (24) 42.0
 
Sept. 10, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 27.0 ppb (25) N/A 20.0 μg/m3 (19) 5.5 μg/m3 (23) 25.0
 
Sept. 10, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 29.0 ppb (27) N/A 13.0 μg/m3 (13) 5.7 μg/m3 (24) 27.0
 
Sept. 10, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 24.0 ppb (23) N/A 13.0 μg/m3 (13) 5.8 μg/m3 (25) 25.0
 
Sept. 10, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 23.0 ppb (22) N/A 16.0 μg/m3 (15) 7.3 μg/m3 (31) 31.0
 
Sept. 10, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 18.0 ppb (17) N/A 19.0 μg/m3 (18) 8.3 μg/m3 (35) 35.0
 
Sept. 10, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) 15.0 ppb (14) N/A 20.0 μg/m3 (19) 8.6 μg/m3 (36) 36.0
 
Sept. 10, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 13.0 ppb (13) N/A 19.0 μg/m3 (18) 8.4 μg/m3 (36) 36.0
 
Sept. 10, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 16.0 ppb (15) N/A 20.0 μg/m3 (19) 8.3 μg/m3 (35) 35.0
 
Sept. 10, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 18.0 ppb (17) N/A 21.0 μg/m3 (20) 8.1 μg/m3 (34) 34.0
 
Sept. 10, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 24.0 ppb (23) N/A 18.0 μg/m3 (17) 7.6 μg/m3 (32) 32.0
 
Sept. 10, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 25.0 ppb (24) N/A 15.0 μg/m3 (14) 6.9 μg/m3 (29) 29.0
 
Sept. 10, 2021, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 32.0 ppb (30) N/A 12.0 μg/m3 (12) 5.8 μg/m3 (25) 30.0
 
Sept. 10, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A 11.0 μg/m3 (11) 5.5 μg/m3 (23) 29.0
 
Sept. 10, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 25.0 ppb (24) N/A 8.0 μg/m3 (8) 4.6 μg/m3 (20) 24.0
 
Sept. 10, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 17.0 ppb (16) N/A 8.0 μg/m3 (8) 4.7 μg/m3 (20) 20.0
 
Sept. 10, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 20.0 ppb (19) N/A 7.0 μg/m3 (7) 4.7 μg/m3 (20) 20.0
 
Sept. 10, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 21.0 ppb (20) N/A 7.0 μg/m3 (7) 4.3 μg/m3 (18) 20.0
 
Sept. 10, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) 29.0 ppb (27) N/A 10.0 μg/m3 (10) 5.7 μg/m3 (24) 27.0
 
Sept. 9, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 26.0 ppb (25) N/A 12.0 μg/m3 (12) 7.0 μg/m3 (30) 30.0
 
Sept. 9, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 32.0 ppb (30) N/A 14.0 μg/m3 (13) 8.0 μg/m3 (34) 34.0
 
Sept. 9, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 33.0 ppb (31) N/A 13.0 μg/m3 (13) 7.9 μg/m3 (33) 33.0
 
Sept. 9, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 32.0 ppb (30) N/A 14.0 μg/m3 (13) 8.3 μg/m3 (35) 35.0
 
Sept. 9, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 33.0 ppb (31) N/A 16.0 μg/m3 (15) 9.3 μg/m3 (39) 39.0
 
Sept. 9, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 33.0 ppb (31) N/A 16.0 μg/m3 (15) 9.2 μg/m3 (39) 39.0
 
Sept. 9, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 33.0 ppb (31) N/A 17.0 μg/m3 (16) 9.5 μg/m3 (40) 40.0
 
Sept. 9, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 35.0 ppb (33) N/A 15.0 μg/m3 (14) 8.7 μg/m3 (37) 37.0
 
Sept. 9, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A 15.0 μg/m3 (14) 7.9 μg/m3 (33) 37.0
 
Sept. 9, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A 16.0 μg/m3 (15) 8.5 μg/m3 (36) 38.0
 
Sept. 9, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 40.0 ppb (38) N/A 21.0 μg/m3 (20) 10.3 μg/m3 (43) 43.0
 
Sept. 9, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A 21.0 μg/m3 (20) 10.5 μg/m3 (44) 44.0
 
Sept. 9, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 29.0 ppb (27) N/A 17.0 μg/m3 (16) 9.0 μg/m3 (38) 38.0
 
Sept. 9, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A 19.0 μg/m3 (18) 9.3 μg/m3 (39) 39.0
 
Sept. 9, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 43.0 ppb (40) N/A 21.0 μg/m3 (20) 9.8 μg/m3 (41) 41.0
 
Sept. 9, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 44.0 ppb (41) N/A 20.0 μg/m3 (19) 9.4 μg/m3 (40) 41.0
 
Sept. 9, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 44.0 ppb (41) N/A 21.0 μg/m3 (20) 9.4 μg/m3 (40) 41.0
 
Sept. 9, 2021, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 42.0 ppb (39) N/A 17.0 μg/m3 (16) 8.1 μg/m3 (34) 39.0
 
Sept. 9, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 44.0 ppb (41) N/A 17.0 μg/m3 (16) 8.0 μg/m3 (34) 41.0
 
Sept. 9, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 48.0 ppb (45) N/A 17.0 μg/m3 (16) 7.8 μg/m3 (33) 45.0
 
Sept. 9, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 48.0 ppb (45) N/A 18.0 μg/m3 (17) 8.0 μg/m3 (34) 45.0
 
Sept. 9, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 47.0 ppb (44) N/A 21.0 μg/m3 (20) 8.3 μg/m3 (35) 44.0
 
Sept. 9, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 47.0 ppb (44) N/A 24.0 μg/m3 (23) 8.6 μg/m3 (36) 44.0
 
Sept. 9, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) 47.0 ppb (44) N/A 25.0 μg/m3 (24) 8.7 μg/m3 (37) 44.0
 
Sept. 8, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 47.0 ppb (44) N/A 22.0 μg/m3 (21) 8.8 μg/m3 (37) 44.0
 
Sept. 8, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 48.0 ppb (45) N/A 25.0 μg/m3 (24) 9.2 μg/m3 (39) 45.0
 
Sept. 8, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 51.0 ppb (48) N/A 26.0 μg/m3 (25) 9.3 μg/m3 (39) 48.0
 
Sept. 8, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 53.0 ppb (50) N/A 31.0 μg/m3 (29) 10.4 μg/m3 (44) 50.0
 
Sept. 8, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 55.0 ppb (51) N/A 28.0 μg/m3 (26) 10.7 μg/m3 (45) 51.0
 
Sept. 8, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 56.0 ppb (55) N/A 26.0 μg/m3 (25) 10.4 μg/m3 (44) 55.0
 
Sept. 8, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 57.0 ppb (58) N/A 26.0 μg/m3 (25) 9.7 μg/m3 (41) 58.0
 
Sept. 8, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 53.0 ppb (50) N/A 20.0 μg/m3 (19) 8.8 μg/m3 (37) 50.0
 
Sept. 8, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 47.0 ppb (44) N/A 19.0 μg/m3 (18) 7.8 μg/m3 (33) 44.0
 
Sept. 8, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 42.0 ppb (39) N/A 17.0 μg/m3 (16) 7.3 μg/m3 (31) 39.0
 
Sept. 8, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A 17.0 μg/m3 (16) 6.8 μg/m3 (29) 37.0
 
Sept. 8, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A 13.0 μg/m3 (13) 6.7 μg/m3 (28) 37.0
 
Sept. 8, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 28.0 ppb (26) N/A 13.0 μg/m3 (13) 6.0 μg/m3 (25) 26.0