AQSQID: 040131003

Site Name: Mesa - Brooks Reservoir

Location: Mesa (Swest), AZ

Reporting: True, Located: True

Current AQI: 41.0

Mesa (Swest) AZ, US: 33.4105, -111.8651

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Jan. 22, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) 0.5 ppb (6) 13.0 μg/m3 (12) 9.9 μg/m3 (41) 41.0
 
Jan. 22, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) 0.5 ppb (6) 17.0 μg/m3 (15) 12.7 μg/m3 (51) 51.0
 
Jan. 22, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) 0.6 ppb (7) 18.0 μg/m3 (16) 14.8 μg/m3 (56) 56.0
 
Jan. 22, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) 0.6 ppb (7) 15.0 μg/m3 (14) 12.4 μg/m3 (51) 51.0
 
Jan. 22, 2020, noon N/A N/A N/A N/A N/A N/A 6.0 ppb (5) 0.6 ppb (7) 17.0 μg/m3 (15) 15.2 μg/m3 (57) 57.0
 
Jan. 22, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) 0.5 ppb (6) 16.0 μg/m3 (15) 15.5 μg/m3 (57) 57.0
 
Jan. 22, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) 0.5 ppb (6) 18.0 μg/m3 (16) 16.4 μg/m3 (59) 59.0
 
Jan. 22, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) 0.5 ppb (6) 14.0 μg/m3 (13) 13.0 μg/m3 (52) 52.0
 
Jan. 22, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) 0.5 ppb (6) 11.0 μg/m3 (10) 10.7 μg/m3 (45) 45.0
 
Jan. 22, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) 0.5 ppb (6) 12.0 μg/m3 (11) 11.4 μg/m3 (48) 48.0
 
Jan. 22, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) 0.5 ppb (6) 9.0 μg/m3 (8) 7.6 μg/m3 (32) 32.0
 
Jan. 22, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) 0.5 ppb (6) 4.0 μg/m3 (4) 2.7 μg/m3 (11) 18.0
 
Jan. 22, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) 0.5 ppb (6) 4.0 μg/m3 (4) 3.1 μg/m3 (13) 18.0
 
Jan. 22, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) 0.5 ppb (6) 7.0 μg/m3 (6) 7.8 μg/m3 (32) 32.0
 
Jan. 22, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) 0.5 ppb (6) 10.0 μg/m3 (9) 10.5 μg/m3 (44) 44.0
 
Jan. 22, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) 0.6 ppb (7) 9.0 μg/m3 (8) 9.4 μg/m3 (39) 39.0
 
Jan. 22, 2020, midnight N/A N/A N/A N/A N/A N/A 21.0 ppb (16) 0.6 ppb (7) 5.0 μg/m3 (5) 6.1 μg/m3 (25) 25.0
 
Jan. 21, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) 0.5 ppb (6) 7.0 μg/m3 (6) 7.7 μg/m3 (32) 32.0
 
Jan. 21, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) 0.5 ppb (6) 8.0 μg/m3 (7) 6.9 μg/m3 (29) 29.0
 
Jan. 21, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) 0.5 ppb (6) 10.0 μg/m3 (9) 7.3 μg/m3 (30) 30.0
 
Jan. 21, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) 0.5 ppb (6) 12.0 μg/m3 (11) 8.5 μg/m3 (35) 35.0
 
Jan. 21, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) 0.5 ppb (6) 6.0 μg/m3 (5) 4.1 μg/m3 (17) 23.0
 
Jan. 21, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) 0.5 ppb (6) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 24.0
 
Jan. 21, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) 0.5 ppb (6) 4.0 μg/m3 (4) 3.8 μg/m3 (16) 22.0
 
Jan. 21, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) 0.5 ppb (6) 3.0 μg/m3 (3) 2.6 μg/m3 (11) 18.0
 
Jan. 21, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.6 ppb (7) 8.0 μg/m3 (7) 6.3 μg/m3 (26) 26.0
 
Jan. 21, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) 0.5 ppb (6) 8.0 μg/m3 (7) 4.7 μg/m3 (20) 20.0
 
Jan. 21, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) 0.6 ppb (7) 16.0 μg/m3 (15) 9.7 μg/m3 (40) 40.0
 
Jan. 21, 2020, noon N/A N/A N/A N/A N/A N/A 20.0 ppb (15) 0.5 ppb (6) 15.0 μg/m3 (14) 8.2 μg/m3 (34) 34.0
 
Jan. 21, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) 0.4 ppb (4) 9.0 μg/m3 (8) 3.4 μg/m3 (14) 18.0
 
Jan. 21, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.4 ppb (4) 15.0 μg/m3 (14) 4.9 μg/m3 (20) 21.0
 
Jan. 21, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) 0.5 ppb (6) 17.0 μg/m3 (15) 5.9 μg/m3 (25) 25.0
 
Jan. 21, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) 0.6 ppb (7) 14.0 μg/m3 (13) 5.2 μg/m3 (22) 22.0
 
Jan. 21, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) 0.6 ppb (7) 16.0 μg/m3 (15) 7.2 μg/m3 (30) 30.0
 
Jan. 21, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) 0.6 ppb (7) 22.0 μg/m3 (20) 9.6 μg/m3 (40) 40.0
 
Jan. 21, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) 0.7 ppb (8) 26.0 μg/m3 (24) 9.1 μg/m3 (38) 38.0
 
Jan. 21, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) 0.7 ppb (8) 26.0 μg/m3 (24) 8.6 μg/m3 (36) 36.0
 
Jan. 21, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) 0.7 ppb (8) 19.0 μg/m3 (17) 7.2 μg/m3 (30) 30.0
 
Jan. 21, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) 0.5 ppb (6) 14.0 μg/m3 (13) 3.4 μg/m3 (14) 16.0
 
Jan. 21, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.5 ppb (6) 14.0 μg/m3 (13) 2.1 μg/m3 (9) 21.0
 
Jan. 21, 2020, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (25) 0.5 ppb (6) 15.0 μg/m3 (14) 3.4 μg/m3 (14) 25.0
 
Jan. 20, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) 0.4 ppb (4) 16.0 μg/m3 (15) 0.2 μg/m3 (1) 27.0
 
Jan. 20, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.4 ppb (4) 18.0 μg/m3 (16) 2.9 μg/m3 (12) 28.0
 
Jan. 20, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.4 ppb (4) 17.0 μg/m3 (15) 4.1 μg/m3 (17) 29.0
 
Jan. 20, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) 0.4 ppb (4) 11.0 μg/m3 (10) 1.9 μg/m3 (8) 31.0
 
Jan. 20, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) 0.4 ppb (4) 13.0 μg/m3 (12) 3.3 μg/m3 (14) 30.0
 
Jan. 20, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) 0.4 ppb (4) 20.0 μg/m3 (18) 5.6 μg/m3 (23) 28.0
 
Jan. 20, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) 0.5 ppb (6) 34.0 μg/m3 (31) 10.2 μg/m3 (42) 42.0
 
Jan. 20, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) 0.8 ppb (9) 41.0 μg/m3 (37) 8.3 μg/m3 (35) 37.0
 
Jan. 20, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) 0.7 ppb (8) 24.0 μg/m3 (22) 3.3 μg/m3 (14) 22.0
 
Jan. 20, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) 0.4 ppb (4) 4.0 μg/m3 (4) -0.7 μg/m3 (0) 24.0
 
Jan. 20, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) 0.4 ppb (4) 3.0 μg/m3 (3) 0.7 μg/m3 (3) 25.0
 
Jan. 20, 2020, noon N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.4 ppb (4) 3.0 μg/m3 (3) 1.9 μg/m3 (8) 28.0
 
Jan. 20, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.4 ppb (4) 3.0 μg/m3 (3) 3.1 μg/m3 (13) 28.0
 
Jan. 20, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.4 ppb (4) 2.0 μg/m3 (2) 1.7 μg/m3 (7) 28.0
 
Jan. 20, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.4 ppb (4) 0.0 μg/m3 (0) 0.3 μg/m3 (1) 29.0
 
Jan. 20, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.4 ppb (4) 0.0 μg/m3 (0) 0.1 μg/m3 (0) 29.0
 
Jan. 20, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.4 ppb (4) 3.0 μg/m3 (3) 3.1 μg/m3 (13) 29.0
 
Jan. 20, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.4 ppb (4) 4.0 μg/m3 (4) 3.0 μg/m3 (12) 29.0
 
Jan. 20, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.4 ppb (4) 5.0 μg/m3 (5) 3.5 μg/m3 (15) 28.0
 
Jan. 20, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) 0.5 ppb (6) 15.0 μg/m3 (14) 9.0 μg/m3 (38) 38.0
 
Jan. 20, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) 0.6 ppb (7) 12.0 μg/m3 (11) 6.3 μg/m3 (26) 26.0
 
Jan. 20, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.6 ppb (7) 14.0 μg/m3 (13) 7.1 μg/m3 (30) 30.0
 
Jan. 20, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.5 ppb (6) 10.0 μg/m3 (9) 6.4 μg/m3 (27) 27.0
 
Jan. 20, 2020, midnight N/A N/A N/A N/A N/A N/A 40.0 ppb (31) 0.4 ppb (4) 6.0 μg/m3 (5) 3.8 μg/m3 (16) 31.0
 
Jan. 19, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) 0.4 ppb (4) 1.0 μg/m3 (1) -0.2 μg/m3 (0) 35.0
 
Jan. 19, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) 0.4 ppb (4) 4.0 μg/m3 (4) 2.7 μg/m3 (11) 37.0
 
Jan. 19, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) 0.4 ppb (4) 3.0 μg/m3 (3) 1.9 μg/m3 (8) 37.0
 
Jan. 19, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) 0.3 ppb (3) 4.0 μg/m3 (4) 1.7 μg/m3 (7) 35.0
 
Jan. 19, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) 0.3 ppb (3) 9.0 μg/m3 (8) 2.7 μg/m3 (11) 35.0
 
Jan. 19, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) 0.3 ppb (3) 5.0 μg/m3 (5) 2.3 μg/m3 (10) 33.0
 
Jan. 19, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) 0.4 ppb (4) 6.0 μg/m3 (5) 1.5 μg/m3 (6) 31.0
 
Jan. 19, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.3 ppb (3) 3.0 μg/m3 (3) -0.5 μg/m3 (0) 29.0
 
Jan. 19, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.4 ppb (4) 4.0 μg/m3 (4) 1.8 μg/m3 (8) 28.0
 
Jan. 19, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) 0.4 ppb (4) 3.0 μg/m3 (3) 2.8 μg/m3 (12) 28.0
 
Jan. 19, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) 0.4 ppb (4) 2.0 μg/m3 (2) 1.6 μg/m3 (7) 28.0
 
Jan. 19, 2020, noon N/A N/A N/A N/A N/A N/A 35.0 ppb (27) 0.4 ppb (4) 1.0 μg/m3 (1) 1.0 μg/m3 (4) 27.0
 
Jan. 19, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) 0.4 ppb (4) 4.0 μg/m3 (4) 3.9 μg/m3 (16) 28.0
 
Jan. 19, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) 0.4 ppb (4) 1.0 μg/m3 (1) 1.1 μg/m3 (5) 24.0
 
Jan. 19, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.4 ppb (4) 5.0 μg/m3 (5) 2.7 μg/m3 (11) 26.0
 
Jan. 19, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) 0.4 ppb (4) 2.0 μg/m3 (2) 1.9 μg/m3 (8) 25.0
 
Jan. 19, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.4 ppb (4) 6.0 μg/m3 (5) 3.8 μg/m3 (16) 26.0
 
Jan. 19, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) 0.4 ppb (4) 19.0 μg/m3 (17) 11.9 μg/m3 (50) 50.0
 
Jan. 19, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) 0.8 ppb (9) 36.0 μg/m3 (33) 21.3 μg/m3 (70) 70.0
 
Jan. 19, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) 0.9 ppb (10) 37.0 μg/m3 (34) 21.0 μg/m3 (69) 69.0
 
Jan. 19, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) 0.9 ppb (10) 32.0 μg/m3 (29) 18.5 μg/m3 (64) 64.0
 
Jan. 19, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) 0.7 ppb (8) 23.0 μg/m3 (21) 12.7 μg/m3 (51) 51.0
 
Jan. 19, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) 0.6 ppb (7) 14.0 μg/m3 (13) 6.8 μg/m3 (28) 28.0
 
Jan. 19, 2020, midnight N/A N/A N/A N/A N/A N/A 43.0 ppb (33) 0.5 ppb (6) 8.0 μg/m3 (7) 4.5 μg/m3 (19) 33.0
 
Jan. 18, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) 0.4 ppb (4) 5.0 μg/m3 (5) 1.6 μg/m3 (7) 38.0
 
Jan. 18, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) 0.4 ppb (4) 3.0 μg/m3 (3) -0.1 μg/m3 (0) 37.0
 
Jan. 18, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) 0.3 ppb (3) 7.0 μg/m3 (6) 4.4 μg/m3 (18) 37.0
 
Jan. 18, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) 0.4 ppb (4) 2.0 μg/m3 (2) -1.0 μg/m3 (0) 35.0
 
Jan. 18, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) 0.4 ppb (4) -4.0 μg/m3 (0) -7.2 μg/m3 (0) 32.0
 
Jan. 18, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) 0.4 ppb (4) 3.0 μg/m3 (3) 1.2 μg/m3 (5) 30.0
 
Jan. 18, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.4 ppb (4) 12.0 μg/m3 (11) 7.2 μg/m3 (30) 30.0
 
Jan. 18, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) 0.6 ppb (7) 20.0 μg/m3 (18) 11.4 μg/m3 (48) 48.0
 
Jan. 18, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) 0.8 ppb (9) 19.0 μg/m3 (17) 7.2 μg/m3 (30) 30.0
 
Jan. 18, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) 0.6 ppb (7) 8.0 μg/m3 (7) 3.5 μg/m3 (15) 15.0
 
Jan. 18, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.4 ppb (4) 5.0 μg/m3 (5) 3.6 μg/m3 (15) 19.0
 
Jan. 18, 2020, noon N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.4 ppb (4) 6.0 μg/m3 (5) 3.9 μg/m3 (16) 19.0
 
Jan. 18, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) 0.4 ppb (4) 15.0 μg/m3 (14) 9.8 μg/m3 (41) 41.0
 
Jan. 18, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) 0.5 ppb (6) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 21.0
 
Jan. 18, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.5 ppb (6) 11.0 μg/m3 (10) 8.0 μg/m3 (33) 33.0
 
Jan. 18, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.4 ppb (4) 7.0 μg/m3 (6) 3.5 μg/m3 (15) 19.0
 
Jan. 18, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.4 ppb (4) 15.0 μg/m3 (14) 9.1 μg/m3 (38) 38.0
 
Jan. 18, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) 0.5 ppb (6) 24.0 μg/m3 (22) 14.9 μg/m3 (56) 56.0
 
Jan. 18, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 6.0 ppb (5) 0.8 ppb (9) 31.0 μg/m3 (28) 16.7 μg/m3 (60) 60.0
 
Jan. 18, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 1.0 ppb (11) 29.0 μg/m3 (26) 12.9 μg/m3 (52) 52.0
 
Jan. 18, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 3.0 ppb (2) 0.9 ppb (10) 25.0 μg/m3 (23) 11.1 μg/m3 (46) 46.0
 
Jan. 18, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) 0.7 ppb (8) 20.0 μg/m3 (18) 7.8 μg/m3 (32) 32.0
 
Jan. 18, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) 0.5 ppb (6) 13.0 μg/m3 (12) 5.3 μg/m3 (22) 22.0
 
Jan. 18, 2020, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (28) 0.4 ppb (4) 13.0 μg/m3 (12) 5.2 μg/m3 (22) 28.0
 
Jan. 17, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) 0.4 ppb (4) 12.0 μg/m3 (11) 5.5 μg/m3 (23) 30.0
 
Jan. 17, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.4 ppb (4) 15.0 μg/m3 (14) 7.0 μg/m3 (29) 29.0
 
Jan. 17, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.4 ppb (4) 16.0 μg/m3 (15) 8.6 μg/m3 (36) 36.0
 
Jan. 17, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) 0.4 ppb (4) 11.0 μg/m3 (10) 6.2 μg/m3 (26) 28.0
 
Jan. 17, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) 0.4 ppb (4) 6.0 μg/m3 (5) 3.8 μg/m3 (16) 23.0
 
Jan. 17, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) 0.5 ppb (6) 9.0 μg/m3 (8) 5.0 μg/m3 (21) 21.0
 
Jan. 17, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) 0.5 ppb (6) 16.0 μg/m3 (15) 5.5 μg/m3 (23) 23.0
 
Jan. 17, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) 0.7 ppb (8) 21.0 μg/m3 (19) 8.8 μg/m3 (37) 37.0
 
Jan. 17, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) 0.7 ppb (8) 20.0 μg/m3 (18) 6.6 μg/m3 (28) 28.0
 
Jan. 17, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 0.9 ppb (10) 19.0 μg/m3 (17) 7.1 μg/m3 (30) 30.0
 
Jan. 17, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.7 ppb (8) 12.0 μg/m3 (11) 4.7 μg/m3 (20) 20.0
 
Jan. 17, 2020, noon N/A N/A N/A N/A N/A N/A 3.0 ppb (2) 0.5 ppb (6) 4.0 μg/m3 (4) -1.4 μg/m3 (0) 6.0
 
Jan. 17, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) 0.4 ppb (4) 0.0 μg/m3 (0) 0.0 μg/m3 (0) 12.0
 
Jan. 17, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.4 ppb (4) 1.0 μg/m3 (1) 1.6 μg/m3 (7) 15.0
 
Jan. 17, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.4 ppb (4) 4.0 μg/m3 (4) 4.7 μg/m3 (20) 20.0
 
Jan. 17, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) 0.4 ppb (4) 3.0 μg/m3 (3) 2.5 μg/m3 (10) 17.0
 
Jan. 17, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.4 ppb (4) 2.0 μg/m3 (2) 1.5 μg/m3 (6) 21.0
 
Jan. 17, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.4 ppb (4) 1.0 μg/m3 (1) 0.3 μg/m3 (1) 19.0
 
Jan. 17, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.4 ppb (4) 3.0 μg/m3 (3) 1.6 μg/m3 (7) 21.0
 
Jan. 17, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.4 ppb (4) 2.0 μg/m3 (2) 1.8 μg/m3 (8) 19.0
 
Jan. 17, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) 0.4 ppb (4) 2.0 μg/m3 (2) 2.1 μg/m3 (9) 24.0
 
Jan. 17, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.4 ppb (4) 4.0 μg/m3 (4) 2.3 μg/m3 (10) 26.0
 
Jan. 17, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.4 ppb (4) 6.0 μg/m3 (5) 1.5 μg/m3 (6) 26.0
 
Jan. 17, 2020, midnight N/A N/A N/A N/A N/A N/A 33.0 ppb (25) 0.4 ppb (4) 8.0 μg/m3 (7) 1.6 μg/m3 (7) 25.0
 
Jan. 16, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.4 ppb (4) 19.0 μg/m3 (17) 5.8 μg/m3 (24) 26.0
 
Jan. 16, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.5 ppb (6) 28.0 μg/m3 (25) 2.1 μg/m3 (9) 25.0
 
Jan. 16, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) 0.4 ppb (4) 42.0 μg/m3 (38) 6.4 μg/m3 (27) 38.0
 
Jan. 16, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) 0.6 ppb (7) 27.0 μg/m3 (25) 7.7 μg/m3 (32) 32.0
 
Jan. 16, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) 0.5 ppb (6) 23.0 μg/m3 (21) 7.0 μg/m3 (29) 29.0
 
Jan. 16, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) 0.5 ppb (6) 28.0 μg/m3 (25) 9.1 μg/m3 (38) 38.0
 
Jan. 16, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) 0.5 ppb (6) 26.0 μg/m3 (24) 7.8 μg/m3 (32) 32.0
 
Jan. 16, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) 0.5 ppb (6) 21.0 μg/m3 (19) 3.8 μg/m3 (16) 19.0
 
Jan. 16, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) 0.6 ppb (7) 16.0 μg/m3 (15) 2.4 μg/m3 (10) 15.0
 
Jan. 16, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 4.0 ppb (3) 0.6 ppb (7) 25.0 μg/m3 (23) 6.5 μg/m3 (27) 27.0
 
Jan. 16, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.7 ppb (8) 34.0 μg/m3 (31) 8.0 μg/m3 (33) 33.0
 
Jan. 16, 2020, noon N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.6 ppb (7) 22.0 μg/m3 (20) 7.6 μg/m3 (32) 32.0
 
Jan. 16, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 0.6 ppb (7) 25.0 μg/m3 (23) 11.1 μg/m3 (46) 46.0
 
Jan. 16, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 0.7 ppb (8) 27.0 μg/m3 (25) 10.8 μg/m3 (45) 45.0
 
Jan. 16, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 0.8 ppb (9) 31.0 μg/m3 (28) 12.5 μg/m3 (51) 51.0
 
Jan. 16, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 0.8 ppb (9) 28.0 μg/m3 (25) 12.9 μg/m3 (52) 52.0
 
Jan. 16, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.7 ppb (8) 22.0 μg/m3 (20) 8.7 μg/m3 (36) 36.0
 
Jan. 16, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 0.9 ppb (10) 37.0 μg/m3 (34) 18.9 μg/m3 (65) 65.0
 
Jan. 16, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 1.1 ppb (12) 44.0 μg/m3 (40) 20.9 μg/m3 (69) 69.0
 
Jan. 16, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 1.1 ppb (12) 42.0 μg/m3 (38) 19.7 μg/m3 (66) 66.0
 
Jan. 16, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 1.2 ppb (13) 40.0 μg/m3 (36) 18.1 μg/m3 (63) 63.0
 
Jan. 16, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 0.0 ppb (0) 1.1 ppb (12) 35.0 μg/m3 (32) 14.8 μg/m3 (56) 56.0
 
Jan. 16, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 1.0 ppb (1) 1.0 ppb (11) 30.0 μg/m3 (27) 12.3 μg/m3 (51) 51.0
 
Jan. 16, 2020, midnight N/A N/A N/A N/A N/A N/A 10.0 ppb (8) 0.8 ppb (9) 14.0 μg/m3 (13) 2.6 μg/m3 (11) 13.0
 
Jan. 15, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) 0.4 ppb (4) 6.0 μg/m3 (5) 1.0 μg/m3 (4) 25.0
 
Jan. 15, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.4 ppb (4) 5.0 μg/m3 (5) 2.1 μg/m3 (9) 29.0
 
Jan. 15, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.4 ppb (4) 6.0 μg/m3 (5) 3.6 μg/m3 (15) 29.0
 
Jan. 15, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.3 ppb (3) 6.0 μg/m3 (5) 3.9 μg/m3 (16) 28.0
 
Jan. 15, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) 0.3 ppb (3) 3.0 μg/m3 (3) 1.5 μg/m3 (6) 28.0
 
Jan. 15, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) 0.4 ppb (4) 5.0 μg/m3 (5) 2.1 μg/m3 (9) 23.0
 
Jan. 15, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) 0.4 ppb (4) 5.0 μg/m3 (5) 1.6 μg/m3 (7) 23.0