ID: 165

AQSQID: 060570005

Site Name: Grass Valley

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

Updated: April 20, 2021, 10:44 a.m.

Location: Grass Valley (Litton Dr), CA

Reporting: True, Located: True

Current AQI: 105.0

Grass Valley (Litton Dr) CA, US: 39.234402, -121.055603

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 20, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 37.0 μg/m3 (105) 105.0
 
April 20, 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 20, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (34) 34.0
 
April 20, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (78) N/A N/A 8.0 μg/m3 (34) 78.0
 
April 20, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 6.0 μg/m3 (25) 71.0
 
April 20, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 4.0 μg/m3 (17) 71.0
 
April 20, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 3.0 μg/m3 (13) 55.0
 
April 20, 2021, midnight N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 4.0 μg/m3 (17) 50.0
 
April 19, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 2.0 μg/m3 (9) 51.0
 
April 19, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 2.0 μg/m3 (9) 55.0
 
April 19, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 2.0 μg/m3 (9) 55.0
 
April 19, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 2.0 μg/m3 (9) 48.0
 
April 19, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 3.0 μg/m3 (13) 44.0
 
April 19, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 3.0 μg/m3 (13) 45.0
 
April 19, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 2.0 μg/m3 (9) 49.0
 
April 19, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 1.0 μg/m3 (5) 46.0
 
April 19, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 3.0 μg/m3 (13) 42.0
 
April 19, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 3.0 μg/m3 (13) 45.0
 
April 19, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 2.0 μg/m3 (9) 48.0
 
April 19, 2021, noon N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 2.0 μg/m3 (9) 51.0
 
April 19, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 3.0 μg/m3 (13) 50.0
 
April 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 3.0 μg/m3 (13) 50.0
 
April 19, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 2.0 μg/m3 (9) 50.0
 
April 19, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 0.0 μg/m3 (0) 48.0
 
April 19, 2021, 6 a.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 19, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 1.0 μg/m3 (5) 50.0
 
April 19, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 2.0 μg/m3 (9) 50.0
 
April 19, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 4.0 μg/m3 (17) 50.0
 
April 19, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 1.0 μg/m3 (5) 51.0
 
April 19, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 2.0 μg/m3 (9) 51.0
 
April 19, 2021, midnight N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 3.0 μg/m3 (13) 51.0
 
April 18, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 1.0 μg/m3 (5) 51.0
 
April 18, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 1.0 μg/m3 (5) 51.0
 
April 18, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 2.0 μg/m3 (9) 50.0
 
April 18, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 1.0 μg/m3 (5) 50.0
 
April 18, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 0.0 μg/m3 (0) 48.0
 
April 18, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 0.0 μg/m3 (0) 48.0
 
April 18, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 0.0 μg/m3 (0) 48.0
 
April 18, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 1.0 μg/m3 (5) 45.0
 
April 18, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 1.0 μg/m3 (5) 46.0
 
April 18, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 1.0 μg/m3 (5) 47.0
 
April 18, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 2.0 μg/m3 (9) 48.0
 
April 18, 2021, noon N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 1.0 μg/m3 (5) 48.0
 
April 18, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 0.0 μg/m3 (0) 47.0
 
April 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 1.0 μg/m3 (5) 47.0
 
April 18, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 2.0 μg/m3 (9) 46.0
 
April 18, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 4.0 μg/m3 (17) 47.0
 
April 18, 2021, 6 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 18, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 4.0 μg/m3 (17) 47.0
 
April 18, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 0.0 μg/m3 (0) 47.0
 
April 18, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 2.0 μg/m3 (9) 48.0
 
April 18, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 2.0 μg/m3 (9) 48.0
 
April 18, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 0.0 μg/m3 (0) 49.0
 
April 18, 2021, midnight N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 2.0 μg/m3 (9) 49.0
 
April 17, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 2.0 μg/m3 (9) 49.0
 
April 17, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 2.0 μg/m3 (9) 49.0
 
April 17, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 0.0 μg/m3 (0) 50.0
 
April 17, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 0.0 μg/m3 (0) 50.0
 
April 17, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 2.0 μg/m3 (9) 49.0
 
April 17, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 1.0 μg/m3 (5) 45.0
 
April 17, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 1.0 μg/m3 (5) 40.0
 
April 17, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 2.0 μg/m3 (9) 39.0
 
April 17, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 1.0 μg/m3 (5) 38.0
 
April 17, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 1.0 μg/m3 (5) 40.0
 
April 17, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 2.0 μg/m3 (9) 41.0
 
April 17, 2021, noon N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 1.0 μg/m3 (5) 42.0
 
April 17, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 1.0 μg/m3 (5) 43.0
 
April 17, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 1.0 μg/m3 (5) 43.0
 
April 17, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 1.0 μg/m3 (5) 44.0
 
April 17, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 2.0 μg/m3 (9) 45.0
 
April 17, 2021, 6 a.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 17, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 3.0 μg/m3 (13) 47.0
 
April 17, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 5.0 μg/m3 (21) 46.0
 
April 17, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 4.0 μg/m3 (17) 45.0
 
April 17, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 5.0 μg/m3 (21) 46.0
 
April 17, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 5.0 μg/m3 (21) 47.0
 
April 17, 2021, midnight N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 5.0 μg/m3 (21) 49.0
 
April 16, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 6.0 μg/m3 (25) 50.0
 
April 16, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 2.0 μg/m3 (9) 47.0
 
April 16, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 3.0 μg/m3 (13) 43.0
 
April 16, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 4.0 μg/m3 (17) 40.0
 
April 16, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
April 16, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 4.0 μg/m3 (17) 37.0
 
April 16, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 5.0 μg/m3 (21) 36.0
 
April 16, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 3.0 μg/m3 (13) 36.0
 
April 16, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 5.0 μg/m3 (21) 36.0
 
April 16, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (38) N/A N/A 7.0 μg/m3 (30) 38.0
 
April 16, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 5.0 μg/m3 (21) 40.0
 
April 16, 2021, noon N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 5.0 μg/m3 (21) 43.0
 
April 16, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 4.0 μg/m3 (17) 44.0
 
April 16, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 6.0 μg/m3 (25) 44.0
 
April 16, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 4.0 μg/m3 (17) 45.0
 
April 16, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 6.0 μg/m3 (25) 46.0
 
April 16, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A N/A 47.0
 
April 16, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 8.0 μg/m3 (34) 49.0
 
April 16, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 10.0 μg/m3 (42) 48.0
 
April 16, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 8.0 μg/m3 (34) 48.0
 
April 16, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 5.0 μg/m3 (21) 50.0
 
April 16, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 5.0 μg/m3 (21) 50.0
 
April 16, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 3.0 μg/m3 (13) 50.0
 
April 16, 2021, midnight N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 4.0 μg/m3 (17) 49.0
 
April 15, 2021, 11 p.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 15, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 3.0 μg/m3 (13) 13.0
 
April 15, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 4.0 μg/m3 (17) 17.0
 
April 15, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 2.0 μg/m3 (9) 9.0
 
April 15, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 5.0 μg/m3 (21) 21.0
 
April 15, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
April 15, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
April 15, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (78) N/A N/A 6.0 μg/m3 (25) 78.0
 
April 15, 2021, 3 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 15, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 6.0 μg/m3 (25) 43.0
 
April 15, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 7.0 μg/m3 (30) 44.0
 
April 15, 2021, noon N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 8.0 μg/m3 (34) 45.0
 
April 15, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 6.0 μg/m3 (25) 45.0
 
April 15, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 6.0 μg/m3 (25) 45.0
 
April 15, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 5.0 μg/m3 (21) 43.0
 
April 15, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 6.0 μg/m3 (25) 45.0
 
April 15, 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 15, 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 15, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
April 15, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 8.0 μg/m3 (34) 42.0
 
April 15, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 6.0 μg/m3 (25) 42.0
 
April 15, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 5.0 μg/m3 (21) 43.0
 
April 15, 2021, midnight N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 5.0 μg/m3 (21) 43.0
 
April 14, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 2.0 μg/m3 (9) 42.0
 
April 14, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 1.0 μg/m3 (5) 41.0
 
April 14, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 5.0 μg/m3 (21) 40.0
 
April 14, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 7.0 μg/m3 (30) 40.0
 
April 14, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 8.0 μg/m3 (34) 41.0
 
April 14, 2021, 6 p.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
 
April 14, 2021, 5 p.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
 
April 14, 2021, 4 p.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
 
April 14, 2021, 3 p.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
 
April 14, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 5.0 μg/m3 (21) 37.0
 
April 14, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 4.0 μg/m3 (17) 37.0
 
April 14, 2021, noon N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 4.0 μg/m3 (17) 36.0
 
April 14, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (36) N/A N/A 4.0 μg/m3 (17) 36.0
 
April 14, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
April 14, 2021, 9 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
 
April 14, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 4.0 μg/m3 (17) 40.0
 
April 14, 2021, 6 a.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 14, 2021, 5 a.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 14, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 2.0 μg/m3 (9) 45.0
 
April 14, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 2.0 μg/m3 (9) 45.0
 
April 14, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 4.0 μg/m3 (17) 45.0
 
April 14, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 5.0 μg/m3 (21) 47.0
 
April 14, 2021, midnight N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 6.0 μg/m3 (25) 49.0
 
April 13, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 4.0 μg/m3 (17) 50.0
 
April 13, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 5.0 μg/m3 (21) 50.0
 
April 13, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 8.0 μg/m3 (34) 48.0
 
April 13, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 8.0 μg/m3 (34) 44.0
 
April 13, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 7.0 μg/m3 (30) 43.0
 
April 13, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 7.0 μg/m3 (30) 43.0
 
April 13, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 6.0 μg/m3 (25) 42.0
 
April 13, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 5.0 μg/m3 (21) 41.0
 
April 13, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 6.0 μg/m3 (25) 41.0
 
April 13, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 6.0 μg/m3 (25) 40.0
 
April 13, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 5.0 μg/m3 (21) 42.0
 
April 13, 2021, noon N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 4.0 μg/m3 (17) 43.0
 
April 13, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 6.0 μg/m3 (25) 47.0
 
April 13, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 6.0 μg/m3 (25) 46.0
 
April 13, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 3.0 μg/m3 (13) 47.0
 
April 13, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 4.0 μg/m3 (17) 48.0
 
April 13, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A N/A 49.0
 
April 13, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 1.0 μg/m3 (5) 48.0
 
April 13, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 2.0 μg/m3 (9) 47.0
 
April 13, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 4.0 μg/m3 (17) 48.0
 
April 13, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 3.0 μg/m3 (13) 46.0