ID: 476

AQSQID: 250051004

Site Name: Fall River

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

Updated: March 6, 2021, 9:32 a.m.

Location: Fall Riv (Father Kelly), MA

Reporting: True, Located: True

Current AQI: 37.0

Fall Riv (Father Kelly) MA, US: 41.6833, -71.169701

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 6, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 4.0 μg/m3 (17) 37.0
 
March 6, 2021, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 3.0 μg/m3 (13) 37.0
 
March 6, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 6, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 3.0 μg/m3 (13) 39.0
 
March 6, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 4.0 μg/m3 (17) 39.0
 
March 6, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 4.0 μg/m3 (17) 39.0
 
March 6, 2021, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 4.0 μg/m3 (17) 40.0
 
March 6, 2021, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 4.0 μg/m3 (17) 41.0
 
March 5, 2021, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 4.0 μg/m3 (17) 40.0
 
March 5, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 3.0 μg/m3 (13) 39.0
 
March 5, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 5, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 3.0 μg/m3 (13) 40.0
 
March 5, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 3.0 μg/m3 (13) 40.0
 
March 5, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 43.0 ppb (40) N/A N/A 3.0 μg/m3 (13) 40.0
 
March 5, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 3.0 μg/m3 (13) 39.0
 
March 5, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 5, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 5, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 3.0 μg/m3 (13) 37.0
 
March 5, 2021, 1 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 37.0 ppb (35) N/A N/A 3.0 μg/m3 (13) 35.0
 
March 5, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 3.0 μg/m3 (13) 34.0
 
March 5, 2021, 11 a.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 37.0 ppb (35) N/A N/A 2.0 μg/m3 (9) 35.0
 
March 5, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 2.0 μg/m3 (9) 36.0
 
March 5, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 2.0 μg/m3 (9) 37.0
 
March 5, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 2.0 μg/m3 (9) 37.0
 
March 5, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 2.0 μg/m3 (9) 37.0
 
March 5, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 2.0 μg/m3 (9) 38.0
 
March 5, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 5, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 5, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 5, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 5, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 5, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 4, 2021, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
March 4, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 4.0 μg/m3 (17) 36.0
 
March 4, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 4.0 μg/m3 (17) 37.0
 
March 4, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 4.0 μg/m3 (17) 37.0
 
March 4, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 4.0 μg/m3 (17) 37.0
 
March 4, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 5.0 μg/m3 (21) 37.0
 
March 4, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 5.0 μg/m3 (21) 36.0
 
March 4, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
March 4, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 6.0 μg/m3 (25) 33.0
 
March 4, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (31) N/A N/A N/A 31.0
 
March 4, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 16.0 μg/m3 (60) 60.0
 
March 4, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) 27.0 ppb (25) N/A N/A 16.0 μg/m3 (60) 60.0
 
March 4, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 25.0 ppb (24) N/A N/A 16.0 μg/m3 (60) 60.0
 
March 4, 2021, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 15.0 μg/m3 (58) 58.0
 
March 4, 2021, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 14.0 μg/m3 (55) 55.0
 
March 4, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 13.0 μg/m3 (53) 53.0
 
March 4, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 13.0 μg/m3 (53) 53.0
 
March 4, 2021, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 13.0 μg/m3 (53) 53.0
 
March 4, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 4, 2021, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 4, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 4, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 32.0 ppb (30) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 4, 2021, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 4, 2021, midnight N/A N/A N/A N/A N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 3, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 3, 2021, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 8.0 μg/m3 (34) 36.0
 
March 3, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 7.0 μg/m3 (30) 38.0
 
March 3, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 7.0 μg/m3 (30) 39.0
 
March 3, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 7.0 μg/m3 (30) 39.0
 
March 3, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 7.0 μg/m3 (30) 39.0
 
March 3, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 7.0 μg/m3 (30) 38.0
 
March 3, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 7.0 μg/m3 (30) 36.0
 
March 3, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 6.0 μg/m3 (25) 34.0
 
March 3, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 7.0 μg/m3 (30) 30.0
 
March 3, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 28.0 ppb (26) N/A N/A 6.0 μg/m3 (25) 26.0
 
March 3, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) 27.0 ppb (25) N/A N/A 6.0 μg/m3 (25) 25.0
 
March 3, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 26.0 ppb (25) N/A N/A 5.0 μg/m3 (21) 25.0
 
March 3, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 5.0 μg/m3 (21) 29.0
 
March 3, 2021, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 4.0 μg/m3 (17) 34.0
 
March 3, 2021, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
March 3, 2021, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 4.0 μg/m3 (17) 36.0
 
March 3, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 4.0 μg/m3 (17) 37.0
 
March 3, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 3.0 μg/m3 (13) 37.0
 
March 3, 2021, 4 a.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
 
March 3, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 3, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 3, 2021, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 3, 2021, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 2, 2021, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 2, 2021, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 2, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 2, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 2, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 2, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 2, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 2, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 2, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
March 2, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 2, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 2, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) 40.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 2, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 2, 2021, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 2, 2021, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 3.0 μg/m3 (13) 36.0
 
March 2, 2021, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 3.0 μg/m3 (13) 37.0
 
March 2, 2021, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 3.0 μg/m3 (13) 39.0
 
March 2, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 3.0 μg/m3 (13) 41.0
 
March 2, 2021, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 42.0 ppb (39) N/A N/A 3.0 μg/m3 (13) 39.0
 
March 2, 2021, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 2, 2021, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 3.0 μg/m3 (13) 35.0
 
March 2, 2021, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 36.0 ppb (34) N/A N/A 3.0 μg/m3 (13) 34.0
 
March 2, 2021, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 3.0 μg/m3 (13) 35.0
 
March 2, 2021, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 3.0 μg/m3 (13) 36.0
 
March 1, 2021, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 3.0 μg/m3 (13) 36.0
 
March 1, 2021, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 3.0 μg/m3 (13) 35.0
 
March 1, 2021, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 6.0 μg/m3 (25) 33.0
 
March 1, 2021, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 4.0 μg/m3 (17) 29.0
 
March 1, 2021, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 30.0 ppb (28) N/A N/A 2.0 μg/m3 (9) 28.0
 
March 1, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 31.0 ppb (29) N/A N/A 3.0 μg/m3 (13) 29.0
 
March 1, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 4.0 μg/m3 (17) 27.0
 
March 1, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 33.0 ppb (31) N/A N/A 4.0 μg/m3 (17) 31.0
 
March 1, 2021, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 37.0 ppb (35) N/A N/A 3.0 μg/m3 (13) 35.0
 
March 1, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 38.0 ppb (36) N/A N/A 1.0 μg/m3 (5) 36.0
 
March 1, 2021, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 39.0 ppb (37) N/A N/A 1.0 μg/m3 (5) 37.0
 
March 1, 2021, noon N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 2.0 μg/m3 (9) 38.0
 
March 1, 2021, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 41.0 ppb (38) N/A N/A 2.0 μg/m3 (9) 38.0
 
March 1, 2021, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 2.0 μg/m3 (9) 39.0
 
March 1, 2021, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 1.0 μg/m3 (5) 39.0
 
March 1, 2021, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 1.0 μg/m3 (5) 39.0
 
March 1, 2021, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 2.0 μg/m3 (9) 38.0
 
March 1, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 3.0 μg/m3 (13) 38.0
 
March 1, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 5.0 μg/m3 (21) 36.0
 
March 1, 2021, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 7.0 μg/m3 (30) 34.0
 
March 1, 2021, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 1, 2021, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 8.0 μg/m3 (34) 34.0
 
March 1, 2021, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 1, 2021, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 8.0 μg/m3 (34) 35.0
 
Feb. 28, 2021, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 8.0 μg/m3 (34) 34.0
 
Feb. 28, 2021, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A 9.0 μg/m3 (38) 38.0
 
Feb. 28, 2021, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 9.0 μg/m3 (38) 38.0
 
Feb. 28, 2021, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 9.0 μg/m3 (38) 38.0
 
Feb. 28, 2021, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 9.0 μg/m3 (38) 38.0
 
Feb. 28, 2021, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 9.0 μg/m3 (38) 38.0
 
Feb. 28, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 35.0 ppb (33) N/A N/A 9.0 μg/m3 (38) 38.0
 
Feb. 28, 2021, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 10.0 μg/m3 (42) 42.0
 
Feb. 28, 2021, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 9.0 μg/m3 (38) 38.0
 
Feb. 28, 2021, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) 29.0 ppb (27) N/A N/A 9.0 μg/m3 (38) 38.0
 
Feb. 28, 2021, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 9.0 μg/m3 (38) 38.0
 
Feb. 28, 2021, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 9.0 μg/m3 (38) 38.0
 
Feb. 28, 2021, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 8.0 μg/m3 (34) 34.0
 
Feb. 28, 2021, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 7.0 μg/m3 (30) 30.0
 
Feb. 28, 2021, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 7.0 μg/m3 (30) 30.0
 
Feb. 28, 2021, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
Feb. 28, 2021, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 6.0 μg/m3 (25) 27.0
 
Feb. 28, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 5.0 μg/m3 (21) 29.0
 
Feb. 28, 2021, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 4.0 μg/m3 (17) 33.0
 
Feb. 28, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 4.0 μg/m3 (17) 33.0
 
Feb. 28, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 3.0 μg/m3 (13) 33.0
 
Feb. 28, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (34) N/A N/A 4.0 μg/m3 (17) 34.0
 
Feb. 28, 2021, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 3.0 μg/m3 (13) 36.0
 
Feb. 28, 2021, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 3.0 μg/m3 (13) 37.0
 
Feb. 27, 2021, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 4.0 μg/m3 (17) 36.0
 
Feb. 27, 2021, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
Feb. 27, 2021, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 5.0 μg/m3 (21) 41.0
 
Feb. 27, 2021, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 6.0 μg/m3 (25) 42.0
 
Feb. 27, 2021, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 4.0 μg/m3 (17) 42.0
 
Feb. 27, 2021, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 6.0 μg/m3 (25) 41.0
 
Feb. 27, 2021, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 4.0 μg/m3 (17) 39.0
 
Feb. 27, 2021, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
Feb. 27, 2021, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 6.0 μg/m3 (25) 38.0
 
Feb. 27, 2021, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 6.0 μg/m3 (25) 37.0
 
Feb. 27, 2021, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
Feb. 27, 2021, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
Feb. 27, 2021, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
Feb. 27, 2021, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
Feb. 27, 2021, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
Feb. 27, 2021, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 5.0 μg/m3 (21) 37.0