AQSQID: 060570005

Site Name: Grass Valley

Location: Nevada Co, CA

Reporting: True, Located: True

Current AQI: 50.0

Nevada Co CA, US: 39.234402, -121.055603

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 8.0 μg/m3 (33) 44.0
 
March 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 7.0 μg/m3 (29) 43.0
 
March 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 4.0 μg/m3 (17) 40.0
 
March 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 2.0 μg/m3 (8) 38.0
 
March 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
March 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 6.0 μg/m3 (25) 29.0
 
March 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 6.0 μg/m3 (25) 36.0
 
March 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
March 19, 2019, noon N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 2.0 μg/m3 (8) 39.0
 
March 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 3.0 μg/m3 (12) 40.0
 
March 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 5.0 μg/m3 (21) 41.0
 
March 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 6.0 μg/m3 (25) 42.0
 
March 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 5.0 μg/m3 (21) 43.0
 
March 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A N/A 42.0
 
March 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 6.0 μg/m3 (25) 41.0
 
March 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 8.0 μg/m3 (33) 42.0
 
March 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 8.0 μg/m3 (33) 42.0
 
March 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 6.0 μg/m3 (25) 42.0
 
March 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 4.0 μg/m3 (17) 41.0
 
March 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 3.0 μg/m3 (12) 42.0
 
March 19, 2019, midnight N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 3.0 μg/m3 (12) 43.0
 
March 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 2.0 μg/m3 (8) 43.0
 
March 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 3.0 μg/m3 (12) 42.0
 
March 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 2.0 μg/m3 (8) 42.0
 
March 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 3.0 μg/m3 (12) 42.0
 
March 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 4.0 μg/m3 (17) 42.0
 
March 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 4.0 μg/m3 (17) 40.0
 
March 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
March 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 5.0 μg/m3 (21) 36.0
 
March 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 5.0 μg/m3 (21) 35.0
 
March 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 6.0 μg/m3 (25) 38.0
 
March 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 8.0 μg/m3 (33) 38.0
 
March 18, 2019, noon N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 8.0 μg/m3 (33) 38.0
 
March 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 5.0 μg/m3 (21) 39.0
 
March 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 8.0 μg/m3 (33) 38.0
 
March 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 8.0 μg/m3 (33) 38.0
 
March 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A N/A 40.0
 
March 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 9.0 μg/m3 (38) 39.0
 
March 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 7.0 μg/m3 (29) 40.0
 
March 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 7.0 μg/m3 (29) 41.0
 
March 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 9.0 μg/m3 (38) 40.0
 
March 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 18, 2019, midnight N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 6.0 μg/m3 (25) 42.0
 
March 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 7.0 μg/m3 (29) 41.0
 
March 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 9.0 μg/m3 (38) 41.0
 
March 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 7.0 μg/m3 (29) 38.0
 
March 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 6.0 μg/m3 (25) 38.0
 
March 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 7.0 μg/m3 (29) 40.0
 
March 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 6.0 μg/m3 (25) 40.0
 
March 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 6.0 μg/m3 (25) 39.0
 
March 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 8.0 μg/m3 (33) 37.0
 
March 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 7.0 μg/m3 (29) 39.0
 
March 17, 2019, noon N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 9.0 μg/m3 (38) 40.0
 
March 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 9.0 μg/m3 (38) 43.0
 
March 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A N/A 41.0
 
March 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 8.0 μg/m3 (33) 41.0
 
March 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 8.0 μg/m3 (33) 42.0
 
March 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 10.0 μg/m3 (42) 44.0
 
March 17, 2019, midnight N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 4.0 μg/m3 (17) 44.0
 
March 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 3.0 μg/m3 (12) 43.0
 
March 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 4.0 μg/m3 (17) 42.0
 
March 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 4.0 μg/m3 (17) 42.0
 
March 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 6.0 μg/m3 (25) 40.0
 
March 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 7.0 μg/m3 (29) 40.0
 
March 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 7.0 μg/m3 (29) 37.0
 
March 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 4.0 μg/m3 (17) 36.0
 
March 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
March 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
March 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 7.0 μg/m3 (29) 42.0
 
March 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 16, 2019, noon N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 9.0 μg/m3 (38) 42.0
 
March 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 7.0 μg/m3 (29) 42.0
 
March 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 8.0 μg/m3 (33) 41.0
 
March 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 7.0 μg/m3 (29) 41.0
 
March 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
March 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 6.0 μg/m3 (25) 42.0
 
March 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 7.0 μg/m3 (29) 42.0
 
March 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 8.0 μg/m3 (33) 42.0
 
March 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 5.0 μg/m3 (21) 42.0
 
March 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 3.0 μg/m3 (12) 42.0
 
March 16, 2019, midnight N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
March 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 6.0 μg/m3 (25) 43.0
 
March 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 7.0 μg/m3 (29) 42.0
 
March 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A N/A 42.0
 
March 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 7.0 μg/m3 (29) 41.0
 
March 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 9.0 μg/m3 (38) 41.0
 
March 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 7.0 μg/m3 (29) 39.0
 
March 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 7.0 μg/m3 (29) 38.0
 
March 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
March 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 7.0 μg/m3 (29) 42.0
 
March 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 8.0 μg/m3 (33) 40.0
 
March 15, 2019, noon N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 7.0 μg/m3 (29) 39.0
 
March 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A N/A 38.0
 
March 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 9.0 μg/m3 (38) 39.0
 
March 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 8.0 μg/m3 (33) 39.0
 
March 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 8.0 μg/m3 (33) 37.0
 
March 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 5.0 μg/m3 (21) 40.0
 
March 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 2.0 μg/m3 (8) 40.0
 
March 15, 2019, midnight N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 1.0 μg/m3 (4) 39.0
 
March 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 0.0 μg/m3 (0) 39.0
 
March 14, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 2.0 μg/m3 (8) 39.0
 
March 14, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 2.0 μg/m3 (8) 39.0
 
March 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 1.0 μg/m3 (4) 38.0
 
March 14, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 3.0 μg/m3 (12) 41.0
 
March 14, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 4.0 μg/m3 (17) 42.0
 
March 14, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 5.0 μg/m3 (21) 42.0
 
March 14, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 7.0 μg/m3 (29) 39.0
 
March 14, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 9.0 μg/m3 (38) 39.0
 
March 14, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 8.0 μg/m3 (33) 41.0
 
March 14, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 5.0 μg/m3 (21) 41.0
 
March 14, 2019, noon N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 6.0 μg/m3 (25) 40.0
 
March 14, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 7.0 μg/m3 (29) 41.0
 
March 14, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 7.0 μg/m3 (29) 41.0
 
March 14, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 7.0 μg/m3 (29) 40.0
 
March 14, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 8.0 μg/m3 (33) 37.0
 
March 14, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A N/A 36.0
 
March 14, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 8.0 μg/m3 (33) 37.0
 
March 14, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 6.0 μg/m3 (25) 38.0
 
March 14, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
March 14, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 6.0 μg/m3 (25) 33.0
 
March 14, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 5.0 μg/m3 (21) 34.0
 
March 14, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 4.0 μg/m3 (17) 35.0
 
March 14, 2019, midnight N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 2.0 μg/m3 (8) 35.0
 
March 13, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 1.0 μg/m3 (4) 35.0
 
March 13, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 1.0 μg/m3 (4) 38.0
 
March 13, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 2.0 μg/m3 (8) 39.0
 
March 13, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 3.0 μg/m3 (12) 38.0
 
March 13, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 3.0 μg/m3 (12) 38.0
 
March 13, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 2.0 μg/m3 (8) 36.0
 
March 13, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 1.0 μg/m3 (4) 34.0
 
March 13, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 4.0 μg/m3 (17) 32.0
 
March 13, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
March 13, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 7.0 μg/m3 (29) 35.0
 
March 13, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 6.0 μg/m3 (25) 35.0
 
March 13, 2019, noon N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 8.0 μg/m3 (33) 35.0
 
March 13, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 13, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 13, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 8.0 μg/m3 (33) 35.0
 
March 13, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 8.0 μg/m3 (33) 36.0
 
March 13, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A N/A 36.0
 
March 13, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 6.0 μg/m3 (25) 36.0
 
March 13, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 6.0 μg/m3 (25) 37.0
 
March 13, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 7.0 μg/m3 (29) 38.0
 
March 13, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 13, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
March 13, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 4.0 μg/m3 (17) 40.0
 
March 13, 2019, midnight N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 2.0 μg/m3 (8) 38.0
 
March 12, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 2.0 μg/m3 (8) 39.0