AQSQID: 490353006

Site Name: Hawthorne

Location: Salt Lake City, UT

Reporting: True, Located: True

Current AQI: 47.0

Salt Lake City UT, US: 40.733501, -111.871696

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 21, 2019, 10 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 61.0 ppb (47) 0.1 ppb (1) N/A 2.4 μg/m3 (10) 47.0
 
March 21, 2019, 9 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 60.0 ppb (46) 0.1 ppb (1) N/A 2.2 μg/m3 (9) 46.0
 
March 21, 2019, 8 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 60.0 ppb (46) 0.1 ppb (1) N/A 2.2 μg/m3 (9) 46.0
 
March 21, 2019, 7 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 62.0 ppb (48) 0.1 ppb (1) N/A 2.4 μg/m3 (10) 48.0
 
March 21, 2019, 6 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 62.0 ppb (48) 0.1 ppb (1) N/A 2.7 μg/m3 (11) 48.0
 
March 21, 2019, 5 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 63.0 ppb (48) 0.1 ppb (1) N/A 3.1 μg/m3 (13) 48.0
 
March 21, 2019, 4 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 64.0 ppb (49) 0.1 ppb (1) N/A 3.6 μg/m3 (15) 49.0
 
March 21, 2019, 3 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 65.0 ppb (50) 0.1 ppb (1) N/A 3.9 μg/m3 (16) 50.0
 
March 21, 2019, 2 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 67.0 ppb (52) 0.1 ppb (1) N/A 4.8 μg/m3 (20) 52.0
 
March 21, 2019, 1 a.m. 3.0 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 67.0 ppb (52) 0.1 ppb (1) N/A 4.4 μg/m3 (18) 52.0
 
March 21, 2019, midnight 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 67.0 ppb (52) 0.1 ppb (1) N/A 3.9 μg/m3 (16) 52.0
 
March 20, 2019, 11 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 66.0 ppb (51) 0.1 ppb (1) N/A 2.7 μg/m3 (11) 51.0
 
March 20, 2019, 10 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 65.0 ppb (50) 0.1 ppb (1) N/A 1.8 μg/m3 (8) 50.0
 
March 20, 2019, 9 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 64.0 ppb (49) 0.1 ppb (1) N/A 1.7 μg/m3 (7) 49.0
 
March 20, 2019, 8 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 63.0 ppb (48) 0.1 ppb (1) N/A 1.5 μg/m3 (6) 48.0
 
March 20, 2019, 7 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 61.0 ppb (47) 0.1 ppb (1) N/A 1.5 μg/m3 (6) 47.0
 
March 20, 2019, 6 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 60.0 ppb (46) 0.1 ppb (1) N/A 1.4 μg/m3 (6) 46.0
 
March 20, 2019, 5 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A N/A 59.0 ppb (45) 0.1 ppb (1) N/A 1.3 μg/m3 (5) 45.0
 
March 20, 2019, 4 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 59.0 ppb (45) 0.1 ppb (1) N/A 1.6 μg/m3 (7) 45.0
 
March 20, 2019, 3 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 59.0 ppb (45) 0.1 ppb (1) N/A 1.8 μg/m3 (8) 45.0
 
March 20, 2019, 2 p.m. 9.0 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 56.0 ppb (43) 0.1 ppb (1) N/A 2.4 μg/m3 (10) 43.0
 
March 20, 2019, 1 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 58.0 ppb (45) 0.1 ppb (1) N/A 2.6 μg/m3 (11) 45.0
 
March 20, 2019, noon 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 60.0 ppb (46) 0.1 ppb (1) N/A 3.1 μg/m3 (13) 46.0
 
March 20, 2019, 11 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) N/A 0.1 ppb (1) N/A 3.3 μg/m3 (14) 14.0
 
March 20, 2019, 10 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 60.0 ppb (46) 0.1 ppb (1) N/A 3.0 μg/m3 (12) 46.0
 
March 20, 2019, 9 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 60.0 ppb (46) 0.1 ppb (1) N/A 3.0 μg/m3 (12) 46.0
 
March 20, 2019, 8 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 60.0 ppb (46) 0.1 ppb (1) N/A 3.2 μg/m3 (13) 46.0
 
March 20, 2019, 7 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 61.0 ppb (47) 0.1 ppb (1) N/A 3.2 μg/m3 (13) 47.0
 
March 20, 2019, 6 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 62.0 ppb (48) 0.1 ppb (1) N/A 3.8 μg/m3 (16) 48.0
 
March 20, 2019, 5 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 64.0 ppb (49) 0.1 ppb (1) N/A 3.9 μg/m3 (16) 49.0
 
March 20, 2019, 4 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 66.0 ppb (51) 0.1 ppb (1) N/A 4.2 μg/m3 (18) 51.0
 
March 20, 2019, 3 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 67.0 ppb (52) 0.1 ppb (1) N/A 4.0 μg/m3 (17) 52.0
 
March 20, 2019, 2 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 67.0 ppb (52) 0.1 ppb (1) N/A 3.5 μg/m3 (15) 52.0
 
March 20, 2019, 1 a.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 68.0 ppb (52) 0.1 ppb (1) N/A 3.3 μg/m3 (14) 52.0
 
March 20, 2019, midnight 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 66.0 ppb (51) 0.1 ppb (1) N/A 2.7 μg/m3 (11) 51.0
 
March 19, 2019, 11 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 64.0 ppb (49) 0.1 ppb (1) N/A 2.5 μg/m3 (10) 49.0
 
March 19, 2019, 10 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 62.0 ppb (48) 0.1 ppb (1) N/A 2.4 μg/m3 (10) 48.0
 
March 19, 2019, 9 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 57.0 ppb (44) 0.1 ppb (1) N/A 4.5 μg/m3 (19) 44.0
 
March 19, 2019, 8 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 56.0 ppb (43) 0.1 ppb (1) N/A 3.7 μg/m3 (15) 43.0
 
March 19, 2019, 7 p.m. 13.0 ppb (12) 4.0 ppb (4) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 48.0 ppb (37) N/A N/A 6.3 μg/m3 (26) 37.0
 
March 19, 2019, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 0.2 ppb (2) N/A 7.1 μg/m3 (30) 30.0
 
March 19, 2019, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A 0.3 ppb (3) N/A 6.6 μg/m3 (28) 28.0
 
March 19, 2019, 4 p.m. 50.0 ppb (46) 22.0 ppb (20) N/A 28.0 ppb (26) N/A 1.0 ppb (1) 25.0 ppb (19) 0.4 ppb (4) N/A 6.6 μg/m3 (28) 46.0
 
March 19, 2019, 3 p.m. 64.0 ppb (61) 32.0 ppb (30) N/A 32.0 ppb (30) N/A 1.0 ppb (1) 17.0 ppb (13) 0.6 ppb (7) N/A 6.2 μg/m3 (26) 61.0
 
March 19, 2019, 2 p.m. 128.0 ppb (105) 87.0 ppb (85) N/A 41.0 ppb (38) N/A 1.0 ppb (1) 4.0 ppb (3) 1.1 ppb (12) N/A 8.4 μg/m3 (35) 105.0
 
March 19, 2019, 1 p.m. 106.0 ppb (101) 64.0 ppb (61) N/A 42.0 ppb (39) N/A 1.0 ppb (1) 1.0 ppb (1) 0.9 ppb (10) N/A 6.9 μg/m3 (29) 101.0
 
March 19, 2019, noon 83.0 ppb (81) 44.0 ppb (41) N/A 39.0 ppb (36) N/A 1.0 ppb (1) 1.0 ppb (1) 0.7 ppb (8) N/A 6.3 μg/m3 (26) 81.0
 
March 19, 2019, 11 a.m. 54.0 ppb (50) 17.0 ppb (16) N/A 37.0 ppb (34) N/A N/A 1.0 ppb (1) 0.4 ppb (4) N/A 5.4 μg/m3 (23) 50.0
 
March 19, 2019, 10 a.m. 38.0 ppb (35) 5.0 ppb (5) N/A 33.0 ppb (31) N/A 1.0 ppb (1) 3.0 ppb (2) 0.3 ppb (3) N/A 4.9 μg/m3 (20) 35.0
 
March 19, 2019, 9 a.m. 26.0 ppb (24) 1.0 ppb (1) N/A 25.0 ppb (23) N/A 1.0 ppb (1) 14.0 ppb (11) 0.2 ppb (2) N/A 4.8 μg/m3 (20) 24.0
 
March 19, 2019, 8 a.m. 28.0 ppb (26) 2.0 ppb (2) N/A 25.0 ppb (23) N/A 1.0 ppb (1) 13.0 ppb (10) 0.3 ppb (3) N/A 5.7 μg/m3 (24) 26.0
 
March 19, 2019, 7 a.m. 28.0 ppb (26) 2.0 ppb (2) N/A 25.0 ppb (23) N/A 0.0 ppb (0) 12.0 ppb (9) 0.3 ppb (3) N/A 5.3 μg/m3 (22) 26.0
 
March 19, 2019, 6 a.m. 26.0 ppb (24) 1.0 ppb (1) N/A 25.0 ppb (23) N/A 1.0 ppb (1) 12.0 ppb (9) 0.3 ppb (3) N/A 4.8 μg/m3 (20) 24.0
 
March 19, 2019, 5 a.m. 20.0 ppb (19) 1.0 ppb (1) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 22.0 ppb (17) 0.2 ppb (2) N/A 4.7 μg/m3 (20) 20.0
 
March 19, 2019, 4 a.m. 32.0 ppb (30) 2.0 ppb (2) N/A 29.0 ppb (27) N/A 1.0 ppb (1) 14.0 ppb (11) 0.3 ppb (3) N/A 6.1 μg/m3 (25) 30.0
 
March 19, 2019, 3 a.m. 28.0 ppb (26) 2.0 ppb (2) N/A 26.0 ppb (24) N/A 1.0 ppb (1) 19.0 ppb (15) 0.3 ppb (3) N/A 6.6 μg/m3 (28) 28.0
 
March 19, 2019, 2 a.m. 17.0 ppb (16) 0.0 ppb (0) N/A 16.0 ppb (15) N/A 1.0 ppb (1) 34.0 ppb (26) 0.2 ppb (2) N/A 5.6 μg/m3 (23) 26.0
 
March 19, 2019, 1 a.m. 11.0 ppb (10) 0.0 ppb (0) N/A 10.0 ppb (9) N/A 1.0 ppb (1) 45.0 ppb (35) 0.1 ppb (1) N/A 5.5 μg/m3 (23) 35.0
 
March 19, 2019, midnight 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 1.0 ppb (1) 50.0 ppb (38) 0.1 ppb (1) N/A 5.3 μg/m3 (22) 38.0
 
March 18, 2019, 11 p.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 53.0 ppb (41) 0.1 ppb (1) N/A 4.1 μg/m3 (17) 41.0
 
March 18, 2019, 10 p.m. 10.0 ppb (9) 2.0 ppb (2) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 58.0 ppb (45) 0.1 ppb (1) N/A 9.3 μg/m3 (39) 45.0
 
March 18, 2019, 9 p.m. 16.0 ppb (15) 3.0 ppb (3) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 53.0 ppb (41) 0.2 ppb (2) N/A 12.1 μg/m3 (50) 50.0
 
March 18, 2019, 8 p.m. 20.0 ppb (19) 5.0 ppb (5) N/A 16.0 ppb (15) N/A 2.0 ppb (3) 50.0 ppb (38) 0.2 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 7 p.m. 25.0 ppb (23) 7.0 ppb (6) N/A 18.0 ppb (17) N/A 1.0 ppb (1) 46.0 ppb (35) 0.2 ppb (2) N/A 10.6 μg/m3 (44) 44.0
 
March 18, 2019, 6 p.m. 18.0 ppb (17) 5.0 ppb (5) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 46.0 ppb (35) 0.2 ppb (2) N/A 7.7 μg/m3 (32) 35.0
 
March 18, 2019, 5 p.m. 30.0 ppb (28) 11.0 ppb (10) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 38.0 ppb (29) 0.3 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
March 18, 2019, 4 p.m. 54.0 ppb (50) 24.0 ppb (22) N/A 30.0 ppb (28) N/A 1.0 ppb (1) 23.0 ppb (18) 0.5 ppb (6) N/A 8.8 μg/m3 (37) 50.0
 
March 18, 2019, 3 p.m. 58.0 ppb (54) 24.0 ppb (22) N/A 34.0 ppb (31) N/A 1.0 ppb (1) 16.0 ppb (12) 0.6 ppb (7) N/A 8.6 μg/m3 (36) 54.0
 
March 18, 2019, 2 p.m. 127.0 ppb (105) 81.0 ppb (79) N/A 46.0 ppb (43) N/A 1.0 ppb (1) 4.0 ppb (3) 1.2 ppb (13) N/A 9.5 μg/m3 (40) 105.0
 
March 18, 2019, 1 p.m. 110.0 ppb (102) 65.0 ppb (62) N/A 45.0 ppb (42) N/A 1.0 ppb (1) 1.0 ppb (1) 1.0 ppb (11) N/A 8.7 μg/m3 (36) 102.0
 
March 18, 2019, noon 76.0 ppb (73) 34.0 ppb (31) N/A 41.0 ppb (38) N/A 1.0 ppb (1) 1.0 ppb (1) 0.6 ppb (7) N/A 7.5 μg/m3 (31) 73.0
 
March 18, 2019, 11 a.m. 51.0 ppb (47) 13.0 ppb (12) N/A 39.0 ppb (36) N/A 1.0 ppb (1) 2.0 ppb (2) N/A N/A 7.0 μg/m3 (29) 47.0
 
March 18, 2019, 10 a.m. 46.0 ppb (43) 8.0 ppb (7) N/A 38.0 ppb (35) N/A 1.0 ppb (1) 2.0 ppb (2) 0.3 ppb (3) N/A 7.2 μg/m3 (30) 43.0
 
March 18, 2019, 9 a.m. 37.0 ppb (34) 4.0 ppb (4) N/A 34.0 ppb (31) N/A 1.0 ppb (1) 5.0 ppb (4) 0.3 ppb (3) N/A 6.9 μg/m3 (29) 34.0
 
March 18, 2019, 8 a.m. 35.0 ppb (32) 4.0 ppb (4) N/A 31.0 ppb (29) N/A 1.0 ppb (1) 7.0 ppb (5) 0.3 ppb (3) N/A 7.3 μg/m3 (30) 32.0
 
March 18, 2019, 7 a.m. 27.0 ppb (25) 1.0 ppb (1) N/A 26.0 ppb (24) N/A 1.0 ppb (1) 14.0 ppb (11) 0.3 ppb (3) N/A 7.2 μg/m3 (30) 30.0
 
March 18, 2019, 6 a.m. 28.0 ppb (26) 2.0 ppb (2) N/A 25.0 ppb (23) N/A 1.0 ppb (1) 19.0 ppb (15) 0.3 ppb (3) N/A 8.7 μg/m3 (36) 36.0
 
March 18, 2019, 5 a.m. 20.0 ppb (19) 1.0 ppb (1) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 29.0 ppb (22) 0.2 ppb (2) N/A 8.5 μg/m3 (35) 35.0
 
March 18, 2019, 4 a.m. 33.0 ppb (31) 3.0 ppb (3) N/A 30.0 ppb (28) N/A 1.0 ppb (1) 17.0 ppb (13) 0.4 ppb (4) N/A 8.6 μg/m3 (36) 36.0
 
March 18, 2019, 3 a.m. 35.0 ppb (32) 4.0 ppb (4) N/A 31.0 ppb (29) N/A 1.0 ppb (1) 14.0 ppb (11) 0.4 ppb (4) N/A 6.5 μg/m3 (27) 32.0
 
March 18, 2019, 2 a.m. 16.0 ppb (15) 1.0 ppb (1) N/A 15.0 ppb (14) N/A 1.0 ppb (1) 36.0 ppb (28) 0.2 ppb (2) N/A 5.5 μg/m3 (23) 28.0
 
March 18, 2019, 1 a.m. 9.0 ppb (8) 0.0 ppb (0) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 48.0 ppb (37) 0.1 ppb (1) N/A 5.2 μg/m3 (22) 37.0
 
March 18, 2019, midnight 10.0 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 53.0 ppb (41) 0.1 ppb (1) N/A 6.9 μg/m3 (29) 41.0
 
March 17, 2019, 11 p.m. 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 1.0 ppb (1) 58.0 ppb (45) 0.1 ppb (1) N/A 9.4 μg/m3 (39) 45.0
 
March 17, 2019, 10 p.m. 10.0 ppb (9) 2.0 ppb (2) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 56.0 ppb (43) 0.1 ppb (1) N/A 11.5 μg/m3 (48) 48.0
 
March 17, 2019, 9 p.m. 12.0 ppb (11) 2.0 ppb (2) N/A 10.0 ppb (9) N/A 1.0 ppb (1) 57.0 ppb (44) 0.2 ppb (2) N/A 12.3 μg/m3 (51) 51.0
 
March 17, 2019, 8 p.m. 14.0 ppb (13) 3.0 ppb (3) N/A 11.0 ppb (10) N/A 1.0 ppb (1) 56.0 ppb (43) 0.2 ppb (2) N/A 12.9 μg/m3 (52) 52.0
 
March 17, 2019, 7 p.m. 17.0 ppb (16) 4.0 ppb (4) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 51.0 ppb (39) 0.2 ppb (2) N/A 14.2 μg/m3 (55) 55.0
 
March 17, 2019, 6 p.m. 19.0 ppb (18) 5.0 ppb (5) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 46.0 ppb (35) 0.2 ppb (2) N/A 11.8 μg/m3 (49) 49.0
 
March 17, 2019, 5 p.m. 23.0 ppb (21) 8.0 ppb (7) N/A 15.0 ppb (14) N/A 1.0 ppb (1) 38.0 ppb (29) 0.3 ppb (3) N/A 10.1 μg/m3 (42) 42.0
 
March 17, 2019, 4 p.m. 28.0 ppb (26) 10.0 ppb (9) N/A 18.0 ppb (17) N/A 1.0 ppb (1) 32.0 ppb (25) 0.3 ppb (3) N/A 10.4 μg/m3 (43) 43.0
 
March 17, 2019, 3 p.m. 36.0 ppb (33) 13.0 ppb (12) N/A 23.0 ppb (21) N/A 1.0 ppb (1) 24.0 ppb (18) 0.3 ppb (3) N/A 11.6 μg/m3 (48) 48.0
 
March 17, 2019, 2 p.m. 85.0 ppb (83) 47.0 ppb (44) N/A 38.0 ppb (35) N/A 1.0 ppb (1) 6.0 ppb (5) 0.6 ppb (7) N/A 11.4 μg/m3 (48) 83.0
 
March 17, 2019, 1 p.m. 76.0 ppb (73) 35.0 ppb (32) N/A 41.0 ppb (38) N/A 1.0 ppb (1) 1.0 ppb (1) 0.6 ppb (7) N/A 12.7 μg/m3 (51) 73.0
 
March 17, 2019, noon 63.0 ppb (60) 23.0 ppb (21) N/A 40.0 ppb (37) N/A 0.0 ppb (0) 1.0 ppb (1) 0.4 ppb (4) N/A 12.5 μg/m3 (51) 60.0
 
March 17, 2019, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 1.0 ppb (1) 0.3 ppb (3) N/A 12.6 μg/m3 (51) 51.0
 
March 17, 2019, 10 a.m. 46.0 ppb (43) 8.0 ppb (7) N/A 38.0 ppb (35) N/A 0.0 ppb (0) 2.0 ppb (2) 0.4 ppb (4) N/A 12.6 μg/m3 (51) 51.0
 
March 17, 2019, 9 a.m. 38.0 ppb (35) 4.0 ppb (4) N/A 34.0 ppb (31) N/A 0.0 ppb (0) 5.0 ppb (4) 0.4 ppb (4) N/A 13.9 μg/m3 (54) 54.0
 
March 17, 2019, 8 a.m. 44.0 ppb (41) 8.0 ppb (7) N/A 37.0 ppb (34) N/A 0.0 ppb (0) 3.0 ppb (2) 0.5 ppb (6) N/A 12.9 μg/m3 (52) 52.0
 
March 17, 2019, 7 a.m. 46.0 ppb (43) 8.0 ppb (7) N/A 38.0 ppb (35) N/A 1.0 ppb (1) 5.0 ppb (4) 0.4 ppb (4) N/A 13.4 μg/m3 (53) 53.0
 
March 17, 2019, 6 a.m. 37.0 ppb (34) 5.0 ppb (5) N/A 32.0 ppb (30) N/A 1.0 ppb (1) 13.0 ppb (10) 0.4 ppb (4) N/A 13.8 μg/m3 (54) 54.0
 
March 17, 2019, 5 a.m. 50.0 ppb (46) 12.0 ppb (11) N/A 38.0 ppb (35) N/A 1.0 ppb (1) 6.0 ppb (5) 0.5 ppb (6) N/A 15.2 μg/m3 (57) 57.0
 
March 17, 2019, 4 a.m. 42.0 ppb (39) 5.0 ppb (5) N/A 38.0 ppb (35) N/A 1.0 ppb (1) 9.0 ppb (7) 0.5 ppb (6) N/A 16.6 μg/m3 (60) 60.0
 
March 17, 2019, 3 a.m. 31.0 ppb (29) 1.0 ppb (1) N/A 29.0 ppb (27) N/A 1.0 ppb (1) 25.0 ppb (19) 0.4 ppb (4) N/A 15.9 μg/m3 (58) 58.0
 
March 17, 2019, 2 a.m. 19.0 ppb (18) 1.0 ppb (1) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 40.0 ppb (31) 0.2 ppb (2) N/A 14.5 μg/m3 (55) 55.0
 
March 17, 2019, 1 a.m. 11.0 ppb (10) 0.0 ppb (0) N/A 11.0 ppb (10) N/A 1.0 ppb (1) 51.0 ppb (39) 0.2 ppb (2) N/A 10.9 μg/m3 (45) 45.0
 
March 17, 2019, midnight 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 1.0 ppb (1) 55.0 ppb (42) 0.1 ppb (1) N/A 9.6 μg/m3 (40) 42.0
 
March 16, 2019, 11 p.m. 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 1.0 ppb (1) 58.0 ppb (45) 0.1 ppb (1) N/A 9.1 μg/m3 (38) 45.0
 
March 16, 2019, 10 p.m. 9.0 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 1.0 ppb (1) 58.0 ppb (45) 0.1 ppb (1) N/A 10.4 μg/m3 (43) 45.0
 
March 16, 2019, 9 p.m. 14.0 ppb (13) 3.0 ppb (3) N/A 11.0 ppb (10) N/A 1.0 ppb (1) 54.0 ppb (42) 0.2 ppb (2) N/A 11.7 μg/m3 (49) 49.0
 
March 16, 2019, 8 p.m. 18.0 ppb (17) 4.0 ppb (4) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 51.0 ppb (39) 0.2 ppb (2) N/A 12.1 μg/m3 (50) 50.0
 
March 16, 2019, 7 p.m. 20.0 ppb (19) 6.0 ppb (6) N/A 14.0 ppb (13) N/A 1.0 ppb (1) 47.0 ppb (36) 0.2 ppb (2) N/A 11.2 μg/m3 (47) 47.0
 
March 16, 2019, 6 p.m. 20.0 ppb (19) 6.0 ppb (6) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 44.0 ppb (34) 0.2 ppb (2) N/A 11.5 μg/m3 (48) 48.0
 
March 16, 2019, 5 p.m. 20.0 ppb (19) 7.0 ppb (6) N/A 14.0 ppb (13) N/A 1.0 ppb (1) 41.0 ppb (32) 0.2 ppb (2) N/A 9.8 μg/m3 (41) 41.0
 
March 16, 2019, 4 p.m. 26.0 ppb (24) 9.0 ppb (8) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 34.0 ppb (26) 0.3 ppb (3) N/A 9.7 μg/m3 (40) 40.0
 
March 16, 2019, 3 p.m. 52.0 ppb (48) 25.0 ppb (23) N/A 26.0 ppb (24) N/A 1.0 ppb (1) 23.0 ppb (18) 0.4 ppb (4) N/A 8.7 μg/m3 (36) 48.0
 
March 16, 2019, 2 p.m. 92.0 ppb (90) 50.0 ppb (46) N/A 43.0 ppb (40) N/A 1.0 ppb (1) 6.0 ppb (5) 0.7 ppb (8) N/A 7.1 μg/m3 (30) 90.0
 
March 16, 2019, 1 p.m. 85.0 ppb (83) 41.0 ppb (38) N/A 44.0 ppb (41) N/A 1.0 ppb (1) 1.0 ppb (1) 0.6 ppb (7) N/A 7.1 μg/m3 (30) 83.0
 
March 16, 2019, noon 71.0 ppb (68) 29.0 ppb (27) N/A 42.0 ppb (39) N/A 1.0 ppb (1) 1.0 ppb (1) 0.5 ppb (6) N/A 7.4 μg/m3 (31) 68.0
 
March 16, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 1.0 ppb (1) 0.3 ppb (3) N/A 7.3 μg/m3 (30) 30.0
 
March 16, 2019, 10 a.m. 43.0 ppb (40) 6.0 ppb (6) N/A 37.0 ppb (34) N/A 0.0 ppb (0) 4.0 ppb (3) 0.3 ppb (3) N/A 7.2 μg/m3 (30) 40.0
 
March 16, 2019, 9 a.m. 30.0 ppb (28) 2.0 ppb (2) N/A 28.0 ppb (26) N/A 0.0 ppb (0) 17.0 ppb (13) 0.3 ppb (3) N/A 6.5 μg/m3 (27) 28.0
 
March 16, 2019, 8 a.m. 33.0 ppb (31) 2.0 ppb (2) N/A 31.0 ppb (29) N/A 0.0 ppb (0) 12.0 ppb (9) 0.3 ppb (3) N/A 7.1 μg/m3 (30) 31.0
 
March 16, 2019, 7 a.m. 21.0 ppb (19) 1.0 ppb (1) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 25.0 ppb (19) 0.2 ppb (2) N/A 5.9 μg/m3 (25) 25.0
 
March 16, 2019, 6 a.m. 24.0 ppb (22) 2.0 ppb (2) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 23.0 ppb (18) 0.2 ppb (2) N/A 5.8 μg/m3 (24) 24.0
 
March 16, 2019, 5 a.m. 35.0 ppb (32) 4.0 ppb (4) N/A 31.0 ppb (29) N/A 0.0 ppb (0) 13.0 ppb (10) 0.4 ppb (4) N/A 8.7 μg/m3 (36) 36.0
 
March 16, 2019, 4 a.m. 37.0 ppb (34) 4.0 ppb (4) N/A 33.0 ppb (31) N/A 0.0 ppb (0) 11.0 ppb (8) 0.4 ppb (4) N/A 10.4 μg/m3 (43) 43.0
 
March 16, 2019, 3 a.m. 33.0 ppb (31) 4.0 ppb (4) N/A 30.0 ppb (28) N/A 0.0 ppb (0) 15.0 ppb (12) 0.3 ppb (3) N/A 13.3 μg/m3 (53) 53.0
 
March 16, 2019, 2 a.m. 10.0 ppb (9) 0.0 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 39.0 ppb (30) 0.1 ppb (1) N/A 12.6 μg/m3 (51) 51.0
 
March 16, 2019, 1 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 45.0 ppb (35) 0.1 ppb (1) N/A 8.7 μg/m3 (36) 36.0
 
March 16, 2019, midnight 10.0 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A 1.0 ppb (1) 46.0 ppb (35) 0.1 ppb (1) N/A 5.7 μg/m3 (24) 35.0
 
March 15, 2019, 11 p.m. 12.0 ppb (11) 3.0 ppb (3) N/A 10.0 ppb (9) N/A 1.0 ppb (1) 49.0 ppb (38) 0.2 ppb (2) N/A 5.4 μg/m3 (23) 38.0
 
March 15, 2019, 10 p.m. 14.0 ppb (13) 4.0 ppb (4) N/A 10.0 ppb (9) N/A 1.0 ppb (1) 49.0 ppb (38) 0.2 ppb (2) N/A 4.7 μg/m3 (20) 38.0
 
March 15, 2019, 9 p.m. 16.0 ppb (15) 5.0 ppb (5) N/A 11.0 ppb (10) N/A 1.0 ppb (1) 47.0 ppb (36) 0.2 ppb (2) N/A 4.9 μg/m3 (20) 36.0
 
March 15, 2019, 8 p.m. 20.0 ppb (19) 7.0 ppb (6) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 44.0 ppb (34) 0.2 ppb (2) N/A 5.1 μg/m3 (21) 34.0
 
March 15, 2019, 7 p.m. 18.0 ppb (17) 7.0 ppb (6) N/A 11.0 ppb (10) N/A 1.0 ppb (1) 45.0 ppb (35) 0.2 ppb (2) N/A 4.3 μg/m3 (18) 35.0
 
March 15, 2019, 6 p.m. 10.0 ppb (9) 3.0 ppb (3) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 48.0 ppb (37) 0.2 ppb (2) N/A 3.6 μg/m3 (15) 37.0
 
March 15, 2019, 5 p.m. 11.0 ppb (10) 4.0 ppb (4) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 46.0 ppb (35) 0.2 ppb (2) N/A 3.0 μg/m3 (12) 35.0
 
March 15, 2019, 4 p.m. 25.0 ppb (23) 10.0 ppb (9) N/A 15.0 ppb (14) N/A 1.0 ppb (1) 36.0 ppb (28) 0.3 ppb (3) N/A 3.4 μg/m3 (14) 28.0
 
March 15, 2019, 3 p.m. 43.0 ppb (40) 18.0 ppb (17) N/A 25.0 ppb (23) N/A 1.0 ppb (1) 25.0 ppb (19) 0.5 ppb (6) N/A 3.1 μg/m3 (13) 40.0
 
March 15, 2019, 2 p.m. 76.0 ppb (73) 37.0 ppb (34) N/A 38.0 ppb (35) N/A 1.0 ppb (1) 10.0 ppb (8) 0.8 ppb (9) N/A 4.9 μg/m3 (20) 73.0
 
March 15, 2019, 1 p.m. 66.0 ppb (63) 26.0 ppb (24) N/A 40.0 ppb (37) N/A 0.0 ppb (0) 6.0 ppb (5) 0.6 ppb (7) N/A 4.5 μg/m3 (19) 63.0
 
March 15, 2019, noon 45.0 ppb (42) 10.0 ppb (9) N/A 35.0 ppb (32) N/A 0.0 ppb (0) 10.0 ppb (8) 0.3 ppb (3) N/A 3.4 μg/m3 (14) 42.0
 
March 15, 2019, 11 a.m. 24.0 ppb (22) 3.0 ppb (3) N/A 21.0 ppb (19) N/A 0.0 ppb (0) 24.0 ppb (18) 0.2 ppb (2) N/A 3.3 μg/m3 (14) 22.0
 
March 15, 2019, 10 a.m. 9.0 ppb (8) 0.0 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 37.0 ppb (28) 0.1 ppb (1) N/A 2.5 μg/m3 (10) 28.0
 
March 15, 2019, 9 a.m. 11.0 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 37.0 ppb (28) 0.1 ppb (1) N/A 2.7 μg/m3 (11) 28.0
 
March 15, 2019, 8 a.m. 9.0 ppb (8) 0.0 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 36.0 ppb (28) 0.1 ppb (1) N/A 2.9 μg/m3 (12) 28.0
 
March 15, 2019, 7 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 40.0 ppb (31) 0.1 ppb (1) N/A 2.5 μg/m3 (10) 31.0
 
March 15, 2019, 6 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 37.0 ppb (28) 0.1 ppb (1) N/A 2.3 μg/m3 (10) 28.0
 
March 15, 2019, 5 a.m. 8.0 ppb (7) 1.0 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 38.0 ppb (29) 0.1 ppb (1) N/A 2.5 μg/m3 (10) 29.0
 
March 15, 2019, 4 a.m. 30.0 ppb (28) 6.0 ppb (6) N/A 25.0 ppb (23) N/A 0.0 ppb (0) 19.0 ppb (15) 0.3 ppb (3) N/A 3.9 μg/m3 (16) 28.0
 
March 15, 2019, 3 a.m. 55.0 ppb (51) 16.0 ppb (15) N/A 39.0 ppb (36) N/A 1.0 ppb (1) 5.0 ppb (4) 0.4 ppb (4) N/A 5.6 μg/m3 (23) 51.0
 
March 15, 2019, 2 a.m. 19.0 ppb (18) 1.0 ppb (1) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 30.0 ppb (23) 0.2 ppb (2) N/A 2.9 μg/m3 (12) 23.0
 
March 15, 2019, 1 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 44.0 ppb (34) 0.1 ppb (1) N/A 1.9 μg/m3 (8) 34.0
 
March 15, 2019, midnight 5.0 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 46.0 ppb (35) 0.1 ppb (1) N/A 1.7 μg/m3 (7) 35.0
 
March 14, 2019, 11 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 49.0 ppb (38) 0.1 ppb (1) N/A 1.6 μg/m3 (7) 38.0
 
March 14, 2019, 10 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 50.0 ppb (38) 0.1 ppb (1) N/A 1.8 μg/m3 (8) 38.0
 
March 14, 2019, 9 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 50.0 ppb (38) 0.1 ppb (1) N/A 1.8 μg/m3 (8) 38.0
 
March 14, 2019, 8 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 48.0 ppb (37) 0.1 ppb (1) N/A 2.1 μg/m3 (9) 37.0
 
March 14, 2019, 7 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 45.0 ppb (35) 0.1 ppb (1) N/A 1.9 μg/m3 (8) 35.0
 
March 14, 2019, 6 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 43.0 ppb (33) 0.1 ppb (1) N/A 2.1 μg/m3 (9) 33.0
 
March 14, 2019, 5 p.m. 10.0 ppb (9) 3.0 ppb (3) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 40.0 ppb (31) 0.1 ppb (1) N/A 2.0 μg/m3 (8) 31.0
 
March 14, 2019, 4 p.m. 20.0 ppb (19) 7.0 ppb (6) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 31.0 ppb (24) 0.2 ppb (2) N/A 2.5 μg/m3 (10) 24.0
 
March 14, 2019, 3 p.m. 24.0 ppb (22) 8.0 ppb (7) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 25.0 ppb (19) 0.2 ppb (2) N/A 2.5 μg/m3 (10) 22.0
 
March 14, 2019, 2 p.m. 44.0 ppb (41) 13.0 ppb (12) N/A 31.0 ppb (29) N/A 0.0 ppb (0) 12.0 ppb (9) 0.5 ppb (6) N/A 3.3 μg/m3 (14) 41.0
 
March 14, 2019, 1 p.m. 37.0 ppb (34) 7.0 ppb (6) N/A 30.0 ppb (28) N/A 0.0 ppb (0) 11.0 ppb (8) 0.4 ppb (4) N/A 3.6 μg/m3 (15) 34.0
 
March 14, 2019, noon 20.0 ppb (19) 2.0 ppb (2) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 23.0 ppb (18) 0.2 ppb (2) N/A 2.6 μg/m3 (11) 19.0
 
March 14, 2019, 11 a.m. 10.0 ppb (9) 0.0 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 32.0 ppb (25) 0.1 ppb (1) N/A 2.3 μg/m3 (10) 25.0