AQSQID: 490471004

Site Name: Vernal #4

Location: Vernal (1700 W St), UT

Reporting: True, Located: True

Current AQI: 21.0

Vernal (1700 W St) UT, US: 40.464722, -109.56083

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 28, 2020, midnight 20.9 ppb (19) 2.4 ppb (2) N/A 19.0 ppb (18) N/A N/A 26.0 ppb (20) N/A N/A 5.0 μg/m3 (21) 21.0
 
Jan. 27, 2020, 11 p.m. 10.4 ppb (10) 1.8 ppb (2) N/A 9.0 ppb (8) N/A N/A 37.0 ppb (28) N/A N/A 4.5 μg/m3 (19) 28.0
 
Jan. 27, 2020, 10 p.m. 10.4 ppb (10) 3.1 ppb (3) N/A 7.0 ppb (6) N/A N/A 37.0 ppb (28) N/A N/A 4.0 μg/m3 (17) 28.0
 
Jan. 27, 2020, 9 p.m. 6.0 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (30) N/A N/A 4.0 μg/m3 (17) 30.0
 
Jan. 27, 2020, 8 p.m. 5.9 ppb (5) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) N/A N/A 6.0 μg/m3 (25) 29.0
 
Jan. 27, 2020, 7 p.m. 5.4 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (28) N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 27, 2020, 6 p.m. 6.0 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) N/A N/A 8.1 μg/m3 (34) 34.0
 
Jan. 27, 2020, 5 p.m. 10.1 ppb (9) 2.2 ppb (2) N/A 8.0 ppb (7) N/A N/A 33.0 ppb (25) N/A N/A 9.1 μg/m3 (38) 38.0
 
Jan. 27, 2020, 4 p.m. 20.0 ppb (19) 5.2 ppb (5) N/A 15.0 ppb (14) N/A N/A 25.0 ppb (19) N/A N/A 12.7 μg/m3 (51) 51.0
 
Jan. 27, 2020, 3 p.m. 24.1 ppb (22) 4.5 ppb (4) N/A 20.0 ppb (19) N/A N/A 19.0 ppb (15) N/A N/A 14.1 μg/m3 (54) 54.0
 
Jan. 27, 2020, 2 p.m. 13.2 ppb (12) 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A 23.0 ppb (18) N/A N/A 11.7 μg/m3 (49) 49.0
 
Jan. 27, 2020, 1 p.m. 10.8 ppb (10) 0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A 26.0 ppb (20) N/A N/A 9.1 μg/m3 (38) 38.0
 
Jan. 27, 2020, noon 9.4 ppb (9) 0.4 ppb (0) N/A 9.0 ppb (8) N/A N/A 28.0 ppb (22) N/A N/A 7.5 μg/m3 (31) 31.0
 
Jan. 27, 2020, 11 a.m. 7.6 ppb (7) 0.3 ppb (0) N/A 7.0 ppb (6) N/A N/A 31.0 ppb (24) N/A N/A 8.6 μg/m3 (36) 36.0
 
Jan. 27, 2020, 10 a.m. 6.6 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A 33.0 ppb (25) N/A N/A 8.1 μg/m3 (34) 34.0
 
Jan. 27, 2020, 9 a.m. 5.7 ppb (5) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (26) N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 27, 2020, 8 a.m. 5.6 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (26) N/A N/A 7.3 μg/m3 (30) 30.0
 
Jan. 27, 2020, 7 a.m. 6.2 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (26) N/A N/A 7.4 μg/m3 (31) 31.0
 
Jan. 27, 2020, 6 a.m. 6.6 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (26) N/A N/A 7.7 μg/m3 (32) 32.0
 
Jan. 27, 2020, 5 a.m. 8.1 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A N/A 32.0 ppb (25) N/A N/A 9.8 μg/m3 (41) 41.0
 
Jan. 27, 2020, 4 a.m. 7.6 ppb (7) 0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 33.0 ppb (25) N/A N/A 9.2 μg/m3 (38) 38.0
 
Jan. 27, 2020, 3 a.m. 8.1 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A N/A 33.0 ppb (25) N/A N/A 12.1 μg/m3 (50) 50.0
 
Jan. 27, 2020, 2 a.m. 8.4 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A N/A 33.0 ppb (25) N/A N/A 13.2 μg/m3 (53) 53.0
 
Jan. 27, 2020, 1 a.m. 8.8 ppb (8) 0.2 ppb (0) N/A 9.0 ppb (8) N/A N/A 33.0 ppb (25) N/A N/A 11.5 μg/m3 (48) 48.0
 
Jan. 27, 2020, midnight 9.1 ppb (8) 0.3 ppb (0) N/A 9.0 ppb (8) N/A N/A 33.0 ppb (25) N/A N/A 10.2 μg/m3 (42) 42.0
 
Jan. 26, 2020, 11 p.m. 9.7 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A N/A 34.0 ppb (26) N/A N/A 10.0 μg/m3 (42) 42.0
 
Jan. 26, 2020, 10 p.m. 8.5 ppb (8) 1.5 ppb (1) N/A 7.0 ppb (6) N/A N/A 37.0 ppb (28) N/A N/A 9.2 μg/m3 (38) 38.0
 
Jan. 26, 2020, 9 p.m. 8.3 ppb (8) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A 38.0 ppb (29) N/A N/A 6.9 μg/m3 (29) 29.0
 
Jan. 26, 2020, 8 p.m. 8.7 ppb (8) 2.3 ppb (2) N/A 6.0 ppb (6) N/A N/A 36.0 ppb (28) N/A N/A 7.5 μg/m3 (31) 31.0
 
Jan. 26, 2020, 7 p.m. 6.6 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) N/A N/A 6.3 μg/m3 (26) 27.0
 
Jan. 26, 2020, 6 p.m. 5.8 ppb (5) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) N/A N/A 6.2 μg/m3 (26) 26.0
 
Jan. 26, 2020, 5 p.m. 4.2 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) N/A N/A 5.5 μg/m3 (23) 25.0
 
Jan. 26, 2020, 4 p.m. 3.9 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) N/A N/A 6.8 μg/m3 (28) 28.0
 
Jan. 26, 2020, 3 p.m. 3.9 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 26, 2020, 2 p.m. 3.9 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) N/A N/A 6.0 μg/m3 (25) 25.0
 
Jan. 26, 2020, 1 p.m. 4.1 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) N/A N/A 6.5 μg/m3 (27) 27.0
 
Jan. 26, 2020, noon 4.2 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) N/A N/A 6.8 μg/m3 (28) 28.0
 
Jan. 26, 2020, 11 a.m. 4.7 ppb (4) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A N/A N/A N/A 6.5 μg/m3 (27) 27.0
 
Jan. 26, 2020, 10 a.m. 4.7 ppb (4) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) N/A N/A 7.8 μg/m3 (32) 32.0
 
Jan. 26, 2020, 9 a.m. 4.9 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (26) N/A N/A 6.9 μg/m3 (29) 29.0
 
Jan. 26, 2020, 8 a.m. 5.2 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) N/A N/A 6.6 μg/m3 (28) 28.0
 
Jan. 26, 2020, 7 a.m. 5.8 ppb (5) 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A 37.0 ppb (28) N/A N/A 8.6 μg/m3 (36) 36.0
 
Jan. 26, 2020, 6 a.m. 5.7 ppb (5) 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 37.0 ppb (28) N/A N/A 11.0 μg/m3 (46) 46.0
 
Jan. 26, 2020, 5 a.m. 5.3 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) N/A N/A 10.7 μg/m3 (45) 45.0
 
Jan. 26, 2020, 4 a.m. 5.8 ppb (5) 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 37.0 ppb (28) N/A N/A 9.0 μg/m3 (38) 38.0
 
Jan. 26, 2020, 3 a.m. 7.1 ppb (7) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 36.0 ppb (28) N/A N/A 5.4 μg/m3 (23) 28.0
 
Jan. 26, 2020, 2 a.m. 6.5 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 36.0 ppb (28) N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 26, 2020, 1 a.m. 8.1 ppb (8) 0.5 ppb (0) N/A 8.0 ppb (7) N/A N/A 36.0 ppb (28) N/A N/A 7.1 μg/m3 (30) 30.0
 
Jan. 26, 2020, midnight 10.4 ppb (10) 0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A 36.0 ppb (28) N/A N/A 10.6 μg/m3 (44) 44.0
 
Jan. 25, 2020, 11 p.m. 9.5 ppb (9) 0.8 ppb (1) N/A 9.0 ppb (8) N/A N/A 38.0 ppb (29) N/A N/A 10.8 μg/m3 (45) 45.0
 
Jan. 25, 2020, 10 p.m. 7.3 ppb (7) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A 40.0 ppb (31) N/A N/A 8.7 μg/m3 (36) 36.0
 
Jan. 25, 2020, 9 p.m. 7.0 ppb (6) 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A 38.0 ppb (29) N/A N/A 6.5 μg/m3 (27) 29.0
 
Jan. 25, 2020, 8 p.m. 8.1 ppb (8) 1.5 ppb (1) N/A 7.0 ppb (6) N/A N/A 37.0 ppb (28) N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 25, 2020, 7 p.m. 12.7 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (9) N/A N/A 35.0 ppb (27) N/A N/A 13.6 μg/m3 (53) 53.0
 
Jan. 25, 2020, 6 p.m. 12.3 ppb (11) 2.7 ppb (3) N/A 10.0 ppb (9) N/A N/A 32.0 ppb (25) N/A N/A 15.7 μg/m3 (58) 58.0
 
Jan. 25, 2020, 5 p.m. 12.4 ppb (11) 2.0 ppb (2) N/A 10.0 ppb (9) N/A N/A 30.0 ppb (23) N/A N/A 16.8 μg/m3 (60) 60.0
 
Jan. 25, 2020, 4 p.m. 16.9 ppb (16) 3.1 ppb (3) N/A 14.0 ppb (13) N/A N/A 25.0 ppb (19) N/A N/A 21.6 μg/m3 (70) 70.0
 
Jan. 25, 2020, 3 p.m. 11.3 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A 27.0 ppb (21) N/A N/A 21.0 μg/m3 (69) 69.0
 
Jan. 25, 2020, 2 p.m. 10.4 ppb (10) 0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A 27.0 ppb (21) N/A N/A 19.8 μg/m3 (67) 67.0
 
Jan. 25, 2020, 1 p.m. 8.5 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A N/A 29.0 ppb (22) N/A N/A 18.3 μg/m3 (63) 63.0
 
Jan. 25, 2020, noon 7.0 ppb (6) 0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 30.0 ppb (23) N/A N/A 15.8 μg/m3 (58) 58.0
 
Jan. 25, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 10.8 μg/m3 (45) 45.0
 
Jan. 25, 2020, 10 a.m. 8.6 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 28.0 ppb (22) N/A N/A 12.4 μg/m3 (51) 51.0
 
Jan. 25, 2020, 9 a.m. 10.0 ppb (9) 0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A 27.0 ppb (21) N/A N/A 12.8 μg/m3 (52) 52.0
 
Jan. 25, 2020, 8 a.m. 7.9 ppb (7) 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 29.0 ppb (22) N/A N/A 12.0 μg/m3 (50) 50.0
 
Jan. 25, 2020, 7 a.m. 7.7 ppb (7) 0.3 ppb (0) N/A 7.0 ppb (6) N/A N/A 29.0 ppb (22) N/A N/A 11.2 μg/m3 (47) 47.0
 
Jan. 25, 2020, 6 a.m. 10.3 ppb (10) 0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A 25.0 ppb (19) N/A N/A 13.5 μg/m3 (53) 53.0
 
Jan. 25, 2020, 5 a.m. 11.2 ppb (10) 0.4 ppb (0) N/A 11.0 ppb (10) N/A N/A 23.0 ppb (18) N/A N/A 13.5 μg/m3 (53) 53.0
 
Jan. 25, 2020, 4 a.m. 15.2 ppb (14) 0.5 ppb (0) N/A 15.0 ppb (14) N/A N/A 20.0 ppb (15) N/A N/A 14.9 μg/m3 (56) 56.0
 
Jan. 25, 2020, 3 a.m. 10.9 ppb (10) 0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A 27.0 ppb (21) N/A N/A 8.7 μg/m3 (36) 36.0
 
Jan. 25, 2020, 2 a.m. 21.5 ppb (20) 1.3 ppb (1) N/A 20.0 ppb (19) N/A N/A 19.0 ppb (15) N/A N/A 13.2 μg/m3 (53) 53.0
 
Jan. 25, 2020, 1 a.m. 12.7 ppb (12) 0.4 ppb (0) N/A 12.0 ppb (11) N/A N/A 27.0 ppb (21) N/A N/A 13.0 μg/m3 (52) 52.0
 
Jan. 25, 2020, midnight 13.8 ppb (13) 0.4 ppb (0) N/A 13.0 ppb (12) N/A N/A 27.0 ppb (21) N/A N/A 11.6 μg/m3 (48) 48.0
 
Jan. 24, 2020, 11 p.m. 14.9 ppb (14) 2.1 ppb (2) N/A 13.0 ppb (12) N/A N/A 29.0 ppb (22) N/A N/A 11.4 μg/m3 (48) 48.0
 
Jan. 24, 2020, 10 p.m. 13.4 ppb (12) 2.5 ppb (2) N/A 11.0 ppb (10) N/A N/A 30.0 ppb (23) N/A N/A 11.7 μg/m3 (49) 49.0
 
Jan. 24, 2020, 9 p.m. 11.0 ppb (10) 2.2 ppb (2) N/A 9.0 ppb (8) N/A N/A 33.0 ppb (25) N/A N/A 8.8 μg/m3 (37) 37.0
 
Jan. 24, 2020, 8 p.m. 11.8 ppb (11) 3.4 ppb (3) N/A 8.0 ppb (7) N/A N/A 33.0 ppb (25) N/A N/A 7.3 μg/m3 (30) 30.0
 
Jan. 24, 2020, 7 p.m. 11.4 ppb (11) 3.4 ppb (3) N/A 8.0 ppb (7) N/A N/A 31.0 ppb (24) N/A N/A 7.5 μg/m3 (31) 31.0
 
Jan. 24, 2020, 6 p.m. 6.6 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) N/A N/A 5.7 μg/m3 (24) 25.0
 
Jan. 24, 2020, 5 p.m. 6.1 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) N/A N/A 5.2 μg/m3 (22) 25.0
 
Jan. 24, 2020, 4 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 31.0 ppb (24) N/A N/A 4.6 μg/m3 (19) 24.0
 
Jan. 24, 2020, 3 p.m. 6.1 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 30.0 ppb (23) N/A N/A 4.9 μg/m3 (20) 23.0
 
Jan. 24, 2020, 2 p.m. 4.9 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 30.0 ppb (23) N/A N/A 5.6 μg/m3 (23) 23.0
 
Jan. 24, 2020, 1 p.m. 5.0 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) N/A N/A 4.6 μg/m3 (19) 25.0
 
Jan. 24, 2020, noon 5.0 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) N/A N/A 5.1 μg/m3 (21) 25.0
 
Jan. 24, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 5.6 μg/m3 (23) 25.0
 
Jan. 24, 2020, 10 a.m. 6.3 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) N/A N/A 7.9 μg/m3 (33) 33.0
 
Jan. 24, 2020, 9 a.m. 6.5 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A 30.0 ppb (23) N/A N/A 8.0 μg/m3 (33) 33.0
 
Jan. 24, 2020, 8 a.m. 6.4 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 32.0 ppb (25) N/A N/A 7.7 μg/m3 (32) 32.0
 
Jan. 24, 2020, 7 a.m. 7.1 ppb (7) 0.3 ppb (0) N/A 7.0 ppb (6) N/A N/A 32.0 ppb (25) N/A N/A 11.3 μg/m3 (47) 47.0
 
Jan. 24, 2020, 6 a.m. 6.4 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 36.0 ppb (28) N/A N/A 9.5 μg/m3 (40) 40.0
 
Jan. 24, 2020, 5 a.m. 7.2 ppb (7) 0.3 ppb (0) N/A 7.0 ppb (6) N/A N/A 35.0 ppb (27) N/A N/A 11.0 μg/m3 (46) 46.0
 
Jan. 24, 2020, 4 a.m. 12.1 ppb (11) 0.5 ppb (0) N/A 12.0 ppb (11) N/A N/A 26.0 ppb (20) N/A N/A 17.1 μg/m3 (61) 61.0
 
Jan. 24, 2020, 3 a.m. 12.6 ppb (12) 0.5 ppb (0) N/A 12.0 ppb (11) N/A N/A 28.0 ppb (22) N/A N/A 14.9 μg/m3 (56) 56.0
 
Jan. 24, 2020, 2 a.m. 11.0 ppb (10) 0.4 ppb (0) N/A 11.0 ppb (10) N/A N/A 29.0 ppb (22) N/A N/A 14.5 μg/m3 (55) 55.0
 
Jan. 24, 2020, 1 a.m. 11.6 ppb (11) 0.3 ppb (0) N/A 11.0 ppb (10) N/A N/A 31.0 ppb (24) N/A N/A 13.4 μg/m3 (53) 53.0
 
Jan. 24, 2020, midnight 12.8 ppb (12) 0.5 ppb (0) N/A 12.0 ppb (11) N/A N/A 33.0 ppb (25) N/A N/A 11.3 μg/m3 (47) 47.0
 
Jan. 23, 2020, 11 p.m. 14.7 ppb (14) 1.8 ppb (2) N/A 13.0 ppb (12) N/A N/A 35.0 ppb (27) N/A N/A 11.0 μg/m3 (46) 46.0
 
Jan. 23, 2020, 10 p.m. 12.2 ppb (11) 2.2 ppb (2) N/A 10.0 ppb (9) N/A N/A 38.0 ppb (29) N/A N/A 10.3 μg/m3 (43) 43.0
 
Jan. 23, 2020, 9 p.m. 13.7 ppb (13) 3.7 ppb (3) N/A 10.0 ppb (9) N/A N/A 38.0 ppb (29) N/A N/A 11.3 μg/m3 (47) 47.0
 
Jan. 23, 2020, 8 p.m. 14.3 ppb (13) 4.5 ppb (4) N/A 10.0 ppb (9) N/A N/A 37.0 ppb (28) N/A N/A 8.4 μg/m3 (35) 35.0
 
Jan. 23, 2020, 7 p.m. 15.5 ppb (14) 5.0 ppb (5) N/A 10.0 ppb (9) N/A N/A 34.0 ppb (26) N/A N/A 9.1 μg/m3 (38) 38.0
 
Jan. 23, 2020, 6 p.m. 13.5 ppb (12) 3.8 ppb (4) N/A 10.0 ppb (9) N/A N/A 34.0 ppb (26) N/A N/A 7.4 μg/m3 (31) 31.0
 
Jan. 23, 2020, 5 p.m. 8.2 ppb (8) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A 35.0 ppb (27) N/A N/A 5.0 μg/m3 (21) 27.0
 
Jan. 23, 2020, 4 p.m. 7.6 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 33.0 ppb (25) N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 23, 2020, 3 p.m. 8.1 ppb (8) 0.9 ppb (1) N/A 7.0 ppb (6) N/A N/A 32.0 ppb (25) N/A N/A 8.6 μg/m3 (36) 36.0
 
Jan. 23, 2020, 2 p.m. 8.3 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 31.0 ppb (24) N/A N/A 14.3 μg/m3 (55) 55.0
 
Jan. 23, 2020, 1 p.m. 5.9 ppb (5) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) N/A N/A 9.2 μg/m3 (38) 38.0
 
Jan. 23, 2020, noon 5.4 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) N/A N/A 4.9 μg/m3 (20) 25.0
 
Jan. 23, 2020, 11 a.m. 4.8 ppb (4) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) N/A N/A 5.4 μg/m3 (23) 27.0
 
Jan. 23, 2020, 10 a.m. 5.1 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (26) N/A N/A 7.0 μg/m3 (29) 29.0
 
Jan. 23, 2020, 9 a.m. 5.5 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (28) N/A N/A 6.9 μg/m3 (29) 29.0
 
Jan. 23, 2020, 8 a.m. 6.5 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (26) N/A N/A 12.6 μg/m3 (51) 51.0
 
Jan. 23, 2020, 7 a.m. 6.2 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A N/A 37.0 ppb (28) N/A N/A 11.1 μg/m3 (46) 46.0
 
Jan. 23, 2020, 6 a.m. 6.9 ppb (6) 0.3 ppb (0) N/A 7.0 ppb (6) N/A N/A 39.0 ppb (30) N/A N/A 14.7 μg/m3 (56) 56.0
 
Jan. 23, 2020, 5 a.m. 5.9 ppb (5) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 42.0 ppb (32) N/A N/A 14.7 μg/m3 (56) 56.0
 
Jan. 23, 2020, 4 a.m. 6.0 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 41.0 ppb (32) N/A N/A 10.8 μg/m3 (45) 45.0
 
Jan. 23, 2020, 3 a.m. 7.1 ppb (7) 0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 41.0 ppb (32) N/A N/A 14.4 μg/m3 (55) 55.0
 
Jan. 23, 2020, 2 a.m. 8.1 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 41.0 ppb (32) N/A N/A 15.3 μg/m3 (57) 57.0
 
Jan. 23, 2020, 1 a.m. 7.6 ppb (7) 0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 43.0 ppb (33) N/A N/A 14.9 μg/m3 (56) 56.0
 
Jan. 23, 2020, midnight 9.1 ppb (8) 0.3 ppb (0) N/A 9.0 ppb (8) N/A N/A 43.0 ppb (33) N/A N/A 14.7 μg/m3 (56) 56.0
 
Jan. 22, 2020, 11 p.m. 11.6 ppb (11) 1.4 ppb (1) N/A 10.0 ppb (9) N/A N/A 46.0 ppb (35) N/A N/A 16.3 μg/m3 (59) 59.0
 
Jan. 22, 2020, 10 p.m. 13.4 ppb (12) 2.4 ppb (2) N/A 11.0 ppb (10) N/A N/A 47.0 ppb (36) N/A N/A 16.1 μg/m3 (59) 59.0
 
Jan. 22, 2020, 9 p.m. 12.3 ppb (11) 2.3 ppb (2) N/A 10.0 ppb (9) N/A N/A 47.0 ppb (36) N/A N/A 15.4 μg/m3 (57) 57.0
 
Jan. 22, 2020, 8 p.m. 15.3 ppb (14) 3.2 ppb (3) N/A 12.0 ppb (11) N/A N/A 46.0 ppb (35) N/A N/A 18.8 μg/m3 (64) 64.0
 
Jan. 22, 2020, 7 p.m. 17.9 ppb (17) 3.7 ppb (3) N/A 14.0 ppb (13) N/A N/A 43.0 ppb (33) N/A N/A 21.4 μg/m3 (70) 70.0
 
Jan. 22, 2020, 6 p.m. 14.2 ppb (13) 2.4 ppb (2) N/A 12.0 ppb (11) N/A N/A 42.0 ppb (32) N/A N/A 26.5 μg/m3 (81) 81.0
 
Jan. 22, 2020, 5 p.m. 9.1 ppb (8) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 43.0 ppb (33) N/A N/A 25.7 μg/m3 (79) 79.0
 
Jan. 22, 2020, 4 p.m. 9.6 ppb (9) 1.0 ppb (1) N/A 9.0 ppb (8) N/A N/A 42.0 ppb (32) N/A N/A 21.7 μg/m3 (71) 71.0
 
Jan. 22, 2020, 3 p.m. 7.9 ppb (7) 0.5 ppb (0) N/A 7.0 ppb (6) N/A N/A 42.0 ppb (32) N/A N/A 12.8 μg/m3 (52) 52.0
 
Jan. 22, 2020, 2 p.m. 8.1 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 42.0 ppb (32) N/A N/A 11.4 μg/m3 (48) 48.0
 
Jan. 22, 2020, 1 p.m. 8.3 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 41.0 ppb (32) N/A N/A 12.1 μg/m3 (50) 50.0
 
Jan. 22, 2020, noon 9.6 ppb (9) 0.3 ppb (0) N/A 9.0 ppb (8) N/A N/A 39.0 ppb (30) N/A N/A 12.7 μg/m3 (51) 51.0
 
Jan. 22, 2020, 11 a.m. 10.4 ppb (10) 0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A 40.0 ppb (31) N/A N/A 16.4 μg/m3 (59) 59.0
 
Jan. 22, 2020, 10 a.m. 15.8 ppb (15) 0.6 ppb (1) N/A 15.0 ppb (14) N/A N/A 34.0 ppb (26) N/A N/A 22.2 μg/m3 (72) 72.0
 
Jan. 22, 2020, 9 a.m. 17.9 ppb (17) 0.7 ppb (1) N/A 17.0 ppb (16) N/A N/A 28.0 ppb (22) N/A N/A 32.2 μg/m3 (93) 93.0
 
Jan. 22, 2020, 8 a.m. 16.5 ppb (15) 0.7 ppb (1) N/A 16.0 ppb (15) N/A N/A 31.0 ppb (24) N/A N/A 28.8 μg/m3 (86) 86.0
 
Jan. 22, 2020, 7 a.m. 16.5 ppb (15) 0.7 ppb (1) N/A 16.0 ppb (15) N/A N/A 31.0 ppb (24) N/A N/A 27.2 μg/m3 (82) 82.0
 
Jan. 22, 2020, 6 a.m. 18.1 ppb (17) 0.7 ppb (1) N/A 17.0 ppb (16) N/A N/A 30.0 ppb (23) N/A N/A 26.1 μg/m3 (80) 80.0
 
Jan. 22, 2020, 5 a.m. 21.3 ppb (20) 0.8 ppb (1) N/A 20.0 ppb (19) N/A N/A 28.0 ppb (22) N/A N/A 28.7 μg/m3 (86) 86.0
 
Jan. 22, 2020, 4 a.m. 18.5 ppb (17) 0.6 ppb (1) N/A 18.0 ppb (17) N/A N/A 31.0 ppb (24) N/A N/A 24.3 μg/m3 (76) 76.0
 
Jan. 22, 2020, 3 a.m. 22.0 ppb (20) 0.7 ppb (1) N/A 21.0 ppb (19) N/A N/A 29.0 ppb (22) N/A N/A 28.9 μg/m3 (86) 86.0
 
Jan. 22, 2020, 2 a.m. 29.3 ppb (27) 1.5 ppb (1) N/A 28.0 ppb (26) N/A N/A 24.0 ppb (18) N/A N/A 23.7 μg/m3 (75) 75.0
 
Jan. 22, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 37.3 μg/m3 (104) 104.0
 
Jan. 22, 2020, midnight 14.4 ppb (13) 0.4 ppb (0) N/A 14.0 ppb (13) N/A N/A 38.0 ppb (29) N/A N/A 16.2 μg/m3 (59) 59.0
 
Jan. 21, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 16.4 μg/m3 (59) 59.0
 
Jan. 21, 2020, 10 p.m. 17.9 ppb (17) 2.2 ppb (2) N/A 16.0 ppb (15) N/A N/A 44.0 ppb (34) N/A N/A 17.2 μg/m3 (61) 61.0
 
Jan. 21, 2020, 9 p.m. 17.4 ppb (16) 2.7 ppb (3) N/A 15.0 ppb (14) N/A N/A 44.0 ppb (34) N/A N/A 18.2 μg/m3 (63) 63.0
 
Jan. 21, 2020, 8 p.m. 17.0 ppb (16) 3.0 ppb (3) N/A 14.0 ppb (13) N/A N/A 44.0 ppb (34) N/A N/A 18.6 μg/m3 (64) 64.0
 
Jan. 21, 2020, 7 p.m. 18.9 ppb (18) 3.8 ppb (4) N/A 15.0 ppb (14) N/A N/A 42.0 ppb (32) N/A N/A 18.4 μg/m3 (64) 64.0
 
Jan. 21, 2020, 6 p.m. 27.1 ppb (25) 7.9 ppb (7) N/A 19.0 ppb (18) N/A N/A 37.0 ppb (28) N/A N/A 23.7 μg/m3 (75) 75.0
 
Jan. 21, 2020, 5 p.m. 23.9 ppb (22) 6.1 ppb (6) N/A 18.0 ppb (17) N/A N/A 35.0 ppb (27) N/A N/A 22.8 μg/m3 (73) 73.0
 
Jan. 21, 2020, 4 p.m. 23.2 ppb (21) 4.6 ppb (4) N/A 19.0 ppb (18) N/A N/A 33.0 ppb (25) N/A N/A 20.5 μg/m3 (68) 68.0
 
Jan. 21, 2020, 3 p.m. 21.7 ppb (20) 2.0 ppb (2) N/A 20.0 ppb (19) N/A N/A 28.0 ppb (22) N/A N/A 23.0 μg/m3 (73) 73.0
 
Jan. 21, 2020, 2 p.m. 23.0 ppb (21) 1.7 ppb (2) N/A 21.0 ppb (19) N/A N/A 27.0 ppb (21) N/A N/A 22.6 μg/m3 (73) 73.0
 
Jan. 21, 2020, 1 p.m. 13.2 ppb (12) 0.5 ppb (0) N/A 13.0 ppb (12) N/A N/A 35.0 ppb (27) N/A N/A 19.5 μg/m3 (66) 66.0
 
Jan. 21, 2020, noon 11.3 ppb (10) 0.4 ppb (0) N/A 11.0 ppb (10) N/A N/A 37.0 ppb (28) N/A N/A 18.1 μg/m3 (63) 63.0
 
Jan. 21, 2020, 11 a.m. 10.4 ppb (10) 0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A 38.0 ppb (29) N/A N/A 19.0 μg/m3 (65) 65.0
 
Jan. 17, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 11.4 μg/m3 (48) 48.0
 
Jan. 17, 2020, 8 p.m. 14.0 ppb (13) 3.3 ppb (3) N/A 11.0 ppb (10) N/A N/A 49.0 ppb (38) N/A N/A 11.1 μg/m3 (46) 46.0
 
Jan. 17, 2020, 7 p.m. 12.5 ppb (12) 2.6 ppb (2) N/A 10.0 ppb (9) N/A N/A 45.0 ppb (35) N/A N/A 12.3 μg/m3 (51) 51.0
 
Jan. 17, 2020, 6 p.m. 15.6 ppb (14) 4.3 ppb (4) N/A 11.0 ppb (10) N/A N/A 38.0 ppb (29) N/A N/A 11.7 μg/m3 (49) 49.0
 
Jan. 17, 2020, 5 p.m. 19.7 ppb (18) 4.3 ppb (4) N/A 15.0 ppb (14) N/A N/A 33.0 ppb (25) N/A N/A 19.0 μg/m3 (65) 65.0
 
Jan. 17, 2020, 4 p.m. 27.5 ppb (25) 8.2 ppb (8) N/A 19.0 ppb (18) N/A N/A 26.0 ppb (20) N/A N/A 30.6 μg/m3 (90) 90.0
 
Jan. 17, 2020, 3 p.m. 21.5 ppb (20) 3.6 ppb (3) N/A 18.0 ppb (17) N/A N/A 25.0 ppb (19) N/A N/A 22.4 μg/m3 (72) 72.0
 
Jan. 17, 2020, 2 p.m. 30.4 ppb (28) 3.5 ppb (3) N/A 27.0 ppb (25) N/A N/A 12.0 ppb (9) N/A N/A 31.3 μg/m3 (91) 91.0
 
Jan. 17, 2020, 1 p.m. 15.9 ppb (15) 0.7 ppb (1) N/A 15.0 ppb (14) N/A N/A 26.0 ppb (20) N/A N/A 24.5 μg/m3 (77) 77.0
 
Jan. 17, 2020, noon 18.4 ppb (17) 0.5 ppb (0) N/A 18.0 ppb (17) N/A N/A 26.0 ppb (20) N/A N/A 22.8 μg/m3 (73) 73.0