AQSQID: 271713201

Site Name: St. Michael

Location: St. Michael, MN

Reporting: True, Located: True

Current AQI: 78.0

St. Michael MN, US: 45.2108, -93.6686

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 24, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 20.0 μg/m3 (67) 67.0
 
March 24, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 25.0 μg/m3 (78) 78.0
 
March 24, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 32.0 μg/m3 (93) 93.0
 
March 24, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 27.0 μg/m3 (82) 82.0
 
March 24, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 21.0 μg/m3 (69) 69.0
 
March 24, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 22.0 μg/m3 (71) 71.0
 
March 24, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 17.0 μg/m3 (61) 61.0
 
March 24, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 24, 2019, midnight N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 17.0 μg/m3 (61) 61.0
 
March 23, 2019, 11 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 23, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 6.0 μg/m3 (25) 45.0
 
March 23, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 5.0 μg/m3 (21) 45.0
 
March 23, 2019, 8 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 23, 2019, 7 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 23, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 5.0 μg/m3 (21) 42.0
 
March 23, 2019, 5 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 23, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 23, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 6.0 μg/m3 (25) 34.0
 
March 23, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 5.0 μg/m3 (21) 33.0
 
March 23, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 6.0 μg/m3 (25) 28.0
 
March 23, 2019, noon N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 5.0 μg/m3 (21) 22.0
 
March 23, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 23, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 23, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 23, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 23, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 23, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 23, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 5.0 μg/m3 (21) 21.0
 
March 23, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 4.0 μg/m3 (17) 20.0
 
March 23, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 5.0 μg/m3 (21) 21.0
 
March 23, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 5.0 μg/m3 (21) 22.0
 
March 23, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 3.0 μg/m3 (12) 24.0
 
March 23, 2019, midnight 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 22, 2019, 11 p.m. 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 22, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A -1.0 μg/m3 (0) 39.0
 
March 22, 2019, 9 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 22, 2019, 8 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 22, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 0.0 μg/m3 (0) 37.0
 
March 22, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A -1.0 μg/m3 (0) 36.0
 
March 22, 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 (0) 34.0
 
March 22, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 0.0 μg/m3 (0) 32.0
 
March 22, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 3.0 μg/m3 (12) 32.0
 
March 22, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 5.0 μg/m3 (21) 30.0
 
March 22, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 4.0 μg/m3 (17) 28.0
 
March 22, 2019, noon N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 6.0 μg/m3 (25) 26.0
 
March 22, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 22, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 5.0 μg/m3 (21) 32.0
 
March 22, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 7.0 μg/m3 (29) 34.0
 
March 22, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 7.0 μg/m3 (29) 36.0
 
March 22, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 22, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 5 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 22, 2019, 4 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 22, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 16.0 μg/m3 (59) 59.0
 
March 22, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 17.0 μg/m3 (61) 61.0
 
March 22, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 18.0 μg/m3 (63) 63.0
 
March 22, 2019, midnight N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 21, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 17.0 μg/m3 (61) 61.0
 
March 21, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 14.0 μg/m3 (54) 54.0
 
March 21, 2019, 9 p.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 21, 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 21, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 3.0 μg/m3 (12) 39.0
 
March 21, 2019, 6 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 21, 2019, 5 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 21, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 1.0 μg/m3 (4) 36.0
 
March 21, 2019, 3 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 21, 2019, 2 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 21, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 5.0 μg/m3 (21) 27.0
 
March 21, 2019, noon N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 5.0 μg/m3 (21) 21.0
 
March 21, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 3.0 μg/m3 (12) 26.0
 
March 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 3.0 μg/m3 (12) 28.0
 
March 21, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 2.0 μg/m3 (8) 28.0
 
March 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 0.0 μg/m3 (0) 31.0
 
March 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 2.0 μg/m3 (8) 32.0
 
March 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 3.0 μg/m3 (12) 32.0
 
March 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 3.0 μg/m3 (12) 32.0
 
March 21, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 3.0 μg/m3 (12) 32.0
 
March 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 3.0 μg/m3 (12) 32.0
 
March 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 2.0 μg/m3 (8) 32.0
 
March 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 3.0 μg/m3 (12) 34.0
 
March 21, 2019, midnight 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 20, 2019, 11 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 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 5.0 μg/m3 (21) 37.0
 
March 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
March 20, 2019, 8 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 20, 2019, 7 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 20, 2019, 6 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 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 7.0 μg/m3 (29) 38.0
 
March 20, 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 20, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 14.0 μg/m3 (54) 54.0
 
March 20, 2019, noon N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 16.0 μg/m3 (59) 59.0
 
March 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 7 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 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 4 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 20, 2019, 3 a.m. 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 20, 2019, 2 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 20, 2019, 1 a.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 20, 2019, midnight 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 19, 2019, 11 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 19, 2019, 10 p.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 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 4.0 μg/m3 (17) 37.0
 
March 19, 2019, 8 p.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 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A N/A 33.0
 
March 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 6.0 μg/m3 (25) 34.0
 
March 19, 2019, 5 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 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 1.0 μg/m3 (4) 32.0
 
March 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 3.0 μg/m3 (12) 31.0
 
March 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 6.0 μg/m3 (25) 31.0
 
March 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 4.0 μg/m3 (17) 30.0
 
March 19, 2019, noon N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 5.0 μg/m3 (21) 28.0
 
March 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
March 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 19, 2019, 6 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 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 16.0 μg/m3 (59) 59.0
 
March 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 19, 2019, midnight 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 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 10.0 μg/m3 (42) 45.0
 
March 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A N/A 9.0 μg/m3 (38) 45.0
 
March 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 9.0 μg/m3 (38) 45.0
 
March 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A N/A 5.0 μg/m3 (21) 45.0
 
March 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 5.0 μg/m3 (21) 44.0
 
March 18, 2019, 6 p.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 18, 2019, 5 p.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 18, 2019, 4 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 18, 2019, 3 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 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 7.0 μg/m3 (29) 38.0
 
March 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 18, 2019, noon N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 14.0 μg/m3 (54) 54.0
 
March 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 18, 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 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 17.0 μg/m3 (61) 61.0
 
March 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 18.0 μg/m3 (63) 63.0
 
March 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 16.0 μg/m3 (59) 59.0
 
March 18, 2019, midnight N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 10.0 μg/m3 (42) 43.0
 
March 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 19.0 μg/m3 (65) 65.0
 
March 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 19.0 μg/m3 (65) 65.0
 
March 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 45.0 μg/m3 (124) 124.0
 
March 17, 2019, 4 p.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, 3 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 14.0 μg/m3 (54) 54.0
 
March 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, noon N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 14.0 μg/m3 (54) 54.0
 
March 17, 2019, 11 a.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, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 9 a.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