AQSQID: 040131003

Site Name: Mesa - Brooks Reservoir

Location: Mesa, AZ

Reporting: True, Located: True

Current AQI: 28.0

Mesa AZ, US: 33.4105, -111.8651

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.1 ppb (1) 8.0 μg/m3 (7) 3.1 μg/m3 (13) 28.0
 
March 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) 0.1 ppb (1) 7.0 μg/m3 (6) 1.6 μg/m3 (7) 32.0
 
March 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) 0.1 ppb (1) 11.0 μg/m3 (10) 3.2 μg/m3 (13) 35.0
 
March 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) 0.2 ppb (2) 10.0 μg/m3 (9) 2.9 μg/m3 (12) 31.0
 
March 21, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) 0.2 ppb (2) 12.0 μg/m3 (11) 4.7 μg/m3 (20) 31.0
 
March 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) 0.1 ppb (1) 14.0 μg/m3 (13) 2.9 μg/m3 (12) 32.0
 
March 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) 0.1 ppb (1) 18.0 μg/m3 (16) 2.9 μg/m3 (12) 35.0
 
March 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) 0.1 ppb (1) 14.0 μg/m3 (13) 2.2 μg/m3 (9) 32.0
 
March 21, 2019, midnight N/A N/A N/A N/A N/A N/A 46.0 ppb (35) 0.1 ppb (1) 12.0 μg/m3 (11) -0.1 μg/m3 (0) 35.0
 
March 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) 0.1 ppb (1) 8.0 μg/m3 (7) -0.5 μg/m3 (0) 38.0
 
March 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) 0.1 ppb (1) 10.0 μg/m3 (9) 2.6 μg/m3 (11) 38.0
 
March 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) 0.1 ppb (1) N/A N/A 41.0
 
March 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
March 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) 0.1 ppb (1) 17.0 μg/m3 (15) 8.1 μg/m3 (34) 38.0
 
March 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) 0.2 ppb (2) 20.0 μg/m3 (18) 5.6 μg/m3 (23) 31.0
 
March 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) 0.2 ppb (2) 18.0 μg/m3 (16) 2.7 μg/m3 (11) 23.0
 
March 20, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) 0.2 ppb (2) 17.0 μg/m3 (15) 3.5 μg/m3 (15) 24.0
 
March 20, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.2 ppb (2) 17.0 μg/m3 (15) 4.4 μg/m3 (18) 19.0
 
March 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) 0.2 ppb (2) 17.0 μg/m3 (15) 4.4 μg/m3 (18) 18.0
 
March 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) 0.2 ppb (2) 10.0 μg/m3 (9) 2.7 μg/m3 (11) 15.0
 
March 20, 2019, noon N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.1 ppb (1) 14.0 μg/m3 (13) 6.3 μg/m3 (26) 26.0
 
March 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) 0.1 ppb (1) 13.0 μg/m3 (12) 5.7 μg/m3 (24) 24.0
 
March 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) 0.1 ppb (1) 13.0 μg/m3 (12) 6.3 μg/m3 (26) 26.0
 
March 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) 0.2 ppb (2) 11.0 μg/m3 (10) 5.1 μg/m3 (21) 21.0
 
March 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) 0.2 ppb (2) 9.0 μg/m3 (8) 4.0 μg/m3 (17) 20.0
 
March 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) 0.2 ppb (2) 9.0 μg/m3 (8) 3.7 μg/m3 (15) 24.0
 
March 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) 0.2 ppb (2) 9.0 μg/m3 (8) 2.7 μg/m3 (11) 25.0
 
March 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.2 ppb (2) 12.0 μg/m3 (11) 5.4 μg/m3 (23) 29.0
 
March 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) 0.2 ppb (2) 15.0 μg/m3 (14) 6.2 μg/m3 (26) 30.0
 
March 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) 0.3 ppb (3) 17.0 μg/m3 (15) 6.7 μg/m3 (28) 28.0
 
March 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.3 ppb (3) 11.0 μg/m3 (10) 3.7 μg/m3 (15) 26.0
 
March 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) 0.1 ppb (1) 6.0 μg/m3 (5) 1.5 μg/m3 (6) 38.0
 
March 20, 2019, midnight N/A N/A N/A N/A N/A N/A 54.0 ppb (42) 0.1 ppb (1) 4.0 μg/m3 (4) -0.1 μg/m3 (0) 42.0
 
March 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) 0.1 ppb (1) 6.0 μg/m3 (5) 1.0 μg/m3 (4) 43.0
 
March 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) 0.1 ppb (1) 7.0 μg/m3 (6) 2.9 μg/m3 (12) 43.0
 
March 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) 0.1 ppb (1) 9.0 μg/m3 (8) 3.5 μg/m3 (15) 43.0
 
March 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) 0.1 ppb (1) 11.0 μg/m3 (10) 3.5 μg/m3 (15) 43.0
 
March 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) 0.1 ppb (1) 9.0 μg/m3 (8) 1.6 μg/m3 (7) 42.0
 
March 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) 0.1 ppb (1) 8.0 μg/m3 (7) 1.6 μg/m3 (7) 38.0
 
March 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) 0.1 ppb (1) 9.0 μg/m3 (8) 3.1 μg/m3 (13) 34.0
 
March 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) 0.1 ppb (1) 10.0 μg/m3 (9) 1.4 μg/m3 (6) 30.0
 
March 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) 0.1 ppb (1) 11.0 μg/m3 (10) 4.0 μg/m3 (17) 27.0
 
March 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) 0.1 ppb (1) 12.0 μg/m3 (11) 4.7 μg/m3 (20) 25.0
 
March 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) 0.1 ppb (1) 9.0 μg/m3 (8) 3.5 μg/m3 (15) 22.0
 
March 19, 2019, noon N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.1 ppb (1) 5.0 μg/m3 (5) 2.2 μg/m3 (9) 26.0
 
March 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) 0.1 ppb (1) 3.0 μg/m3 (3) 1.1 μg/m3 (5) 27.0
 
March 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.1 ppb (1) 6.0 μg/m3 (5) 1.9 μg/m3 (8) 28.0
 
March 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.1 ppb (1) 4.0 μg/m3 (4) 1.1 μg/m3 (5) 29.0
 
March 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) 0.1 ppb (1) 6.0 μg/m3 (5) 1.8 μg/m3 (8) 30.0
 
March 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) 0.1 ppb (1) 6.0 μg/m3 (5) 1.2 μg/m3 (5) 30.0
 
March 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.1 ppb (1) 10.0 μg/m3 (9) 2.4 μg/m3 (10) 29.0
 
March 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.1 ppb (1) 17.0 μg/m3 (15) 5.9 μg/m3 (25) 28.0
 
March 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) 0.3 ppb (3) 25.0 μg/m3 (23) 8.2 μg/m3 (34) 34.0
 
March 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) 0.4 ppb (4) 18.0 μg/m3 (16) 7.5 μg/m3 (31) 31.0
 
March 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.2 ppb (2) 6.0 μg/m3 (5) 1.9 μg/m3 (8) 21.0
 
March 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) 0.1 ppb (1) 5.0 μg/m3 (5) 1.5 μg/m3 (6) 38.0
 
March 19, 2019, midnight N/A N/A N/A N/A N/A N/A 55.0 ppb (42) 0.1 ppb (1) 5.0 μg/m3 (5) 2.2 μg/m3 (9) 42.0
 
March 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) 0.1 ppb (1) 7.0 μg/m3 (6) 2.3 μg/m3 (10) 44.0
 
March 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) 0.1 ppb (1) 10.0 μg/m3 (9) 4.7 μg/m3 (20) 45.0
 
March 18, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) 0.1 ppb (1) 11.0 μg/m3 (10) 4.8 μg/m3 (20) 44.0
 
March 18, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) 0.1 ppb (1) 12.0 μg/m3 (11) 3.1 μg/m3 (13) 45.0
 
March 18, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) 0.1 ppb (1) N/A N/A 44.0
 
March 18, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) 0.1 ppb (1) N/A N/A 40.0
 
March 18, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) 0.1 ppb (1) N/A N/A 36.0
 
March 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) 0.1 ppb (1) N/A N/A 31.0
 
March 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) 0.1 ppb (1) N/A N/A 25.0
 
March 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (9) 2.3 μg/m3 (10) 10.0
 
March 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) 0.2 ppb (2) 15.0 μg/m3 (14) 4.2 μg/m3 (18) 18.0
 
March 18, 2019, noon N/A N/A N/A N/A N/A N/A 12.0 ppb (9) 0.2 ppb (2) 7.0 μg/m3 (6) 2.7 μg/m3 (11) 11.0
 
March 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) 0.1 ppb (1) 6.0 μg/m3 (5) 2.7 μg/m3 (11) 22.0
 
March 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) 0.1 ppb (1) 6.0 μg/m3 (5) 2.9 μg/m3 (12) 27.0
 
March 18, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) 0.1 ppb (1) 7.0 μg/m3 (6) 2.8 μg/m3 (12) 25.0
 
March 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) 0.1 ppb (1) 5.0 μg/m3 (5) 0.7 μg/m3 (3) 24.0
 
March 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) 0.1 ppb (1) 7.0 μg/m3 (6) 2.4 μg/m3 (10) 23.0
 
March 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.1 ppb (1) 8.0 μg/m3 (7) 1.2 μg/m3 (5) 26.0
 
March 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) 0.1 ppb (1) 10.0 μg/m3 (9) 2.8 μg/m3 (12) 28.0
 
March 18, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) 0.2 ppb (2) 18.0 μg/m3 (16) 7.6 μg/m3 (32) 32.0
 
March 18, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) 0.4 ppb (4) 16.0 μg/m3 (15) 7.4 μg/m3 (31) 31.0
 
March 18, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) 0.2 ppb (2) 9.0 μg/m3 (8) 3.3 μg/m3 (14) 30.0
 
March 18, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) 0.1 ppb (1) 4.0 μg/m3 (4) 1.1 μg/m3 (5) 41.0
 
March 18, 2019, midnight N/A N/A N/A N/A N/A N/A 55.0 ppb (42) 0.1 ppb (1) 6.0 μg/m3 (5) 2.6 μg/m3 (11) 42.0
 
March 17, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) 0.1 ppb (1) 5.0 μg/m3 (5) 1.9 μg/m3 (8) 42.0
 
March 17, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) 0.1 ppb (1) 5.0 μg/m3 (5) 1.8 μg/m3 (8) 42.0
 
March 17, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) 0.1 ppb (1) 6.0 μg/m3 (5) 2.6 μg/m3 (11) 42.0
 
March 17, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) 0.1 ppb (1) 5.0 μg/m3 (5) 2.5 μg/m3 (10) 41.0
 
March 17, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) 0.1 ppb (1) 3.0 μg/m3 (3) 0.5 μg/m3 (2) 39.0
 
March 17, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) 0.1 ppb (1) 3.0 μg/m3 (3) 1.3 μg/m3 (5) 38.0
 
March 17, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) 0.1 ppb (1) 5.0 μg/m3 (5) 2.8 μg/m3 (12) 36.0
 
March 17, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) 0.1 ppb (1) 4.0 μg/m3 (4) 2.8 μg/m3 (12) 34.0
 
March 17, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) 0.1 ppb (1) 3.0 μg/m3 (3) 0.6 μg/m3 (2) 32.0
 
March 17, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) 0.1 ppb (1) 1.0 μg/m3 (1) -1.4 μg/m3 (0) 30.0
 
March 17, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) 0.1 ppb (1) 0.0 μg/m3 (0) -2.2 μg/m3 (0) 32.0
 
March 17, 2019, noon N/A N/A N/A N/A N/A N/A 43.0 ppb (33) 0.1 ppb (1) 2.0 μg/m3 (2) 0.6 μg/m3 (2) 33.0
 
March 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) 0.1 ppb (1) 4.0 μg/m3 (4) 1.7 μg/m3 (7) 32.0
 
March 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) 0.1 ppb (1) 6.0 μg/m3 (5) 0.0 μg/m3 (0) 33.0
 
March 17, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) 0.1 ppb (1) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 33.0
 
March 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) 0.1 ppb (1) 2.0 μg/m3 (2) 2.6 μg/m3 (11) 32.0
 
March 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.1 ppb (1) 7.0 μg/m3 (6) 6.6 μg/m3 (28) 28.0
 
March 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) 0.2 ppb (2) 12.0 μg/m3 (11) 11.6 μg/m3 (48) 48.0
 
March 17, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.3 ppb (3) 12.0 μg/m3 (11) 11.1 μg/m3 (46) 46.0
 
March 17, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) 0.2 ppb (2) 6.0 μg/m3 (5) 6.6 μg/m3 (28) 28.0
 
March 17, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) 0.2 ppb (2) 7.0 μg/m3 (6) 6.6 μg/m3 (28) 28.0
 
March 17, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.2 ppb (2) 5.0 μg/m3 (5) 4.0 μg/m3 (17) 29.0
 
March 17, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) 0.1 ppb (1) 4.0 μg/m3 (4) 3.5 μg/m3 (15) 35.0
 
March 17, 2019, midnight N/A N/A N/A N/A N/A N/A 49.0 ppb (38) 0.1 ppb (1) 10.0 μg/m3 (9) 5.2 μg/m3 (22) 38.0
 
March 16, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) 0.1 ppb (1) 13.0 μg/m3 (12) 1.4 μg/m3 (6) 39.0
 
March 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) 0.1 ppb (1) 18.0 μg/m3 (16) 1.4 μg/m3 (6) 40.0
 
March 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) 0.1 ppb (1) 22.0 μg/m3 (20) 1.8 μg/m3 (8) 41.0
 
March 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) 0.1 ppb (1) 17.0 μg/m3 (15) 3.0 μg/m3 (12) 41.0
 
March 16, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) 0.1 ppb (1) 14.0 μg/m3 (13) 0.4 μg/m3 (2) 41.0
 
March 16, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) 0.1 ppb (1) 13.0 μg/m3 (12) 0.3 μg/m3 (1) 39.0
 
March 16, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) 0.1 ppb (1) 13.0 μg/m3 (12) 0.2 μg/m3 (1) 38.0
 
March 16, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) 0.1 ppb (1) 16.0 μg/m3 (15) 2.7 μg/m3 (11) 36.0
 
March 16, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) 0.1 ppb (1) 18.0 μg/m3 (16) 3.7 μg/m3 (15) 34.0
 
March 16, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) 0.1 ppb (1) 18.0 μg/m3 (16) 4.6 μg/m3 (19) 33.0
 
March 16, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) 0.1 ppb (1) 16.0 μg/m3 (15) 2.9 μg/m3 (12) 33.0
 
March 16, 2019, noon N/A N/A N/A N/A N/A N/A 45.0 ppb (35) 0.1 ppb (1) 18.0 μg/m3 (16) 2.8 μg/m3 (12) 35.0
 
March 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) 0.1 ppb (1) 23.0 μg/m3 (21) 2.7 μg/m3 (11) 36.0
 
March 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) 0.1 ppb (1) 29.0 μg/m3 (26) 3.2 μg/m3 (13) 36.0
 
March 16, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) 0.1 ppb (1) 35.0 μg/m3 (32) 4.9 μg/m3 (20) 35.0
 
March 16, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) 0.1 ppb (1) 34.0 μg/m3 (31) 3.7 μg/m3 (15) 35.0
 
March 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) 0.1 ppb (1) 41.0 μg/m3 (37) 6.0 μg/m3 (25) 37.0
 
March 16, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) 0.1 ppb (1) 37.0 μg/m3 (34) 5.1 μg/m3 (21) 34.0
 
March 16, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) 0.2 ppb (2) 33.0 μg/m3 (30) 3.8 μg/m3 (16) 32.0
 
March 16, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) 0.1 ppb (1) 34.0 μg/m3 (31) 5.5 μg/m3 (23) 34.0
 
March 16, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) 0.2 ppb (2) 33.0 μg/m3 (30) 5.3 μg/m3 (22) 30.0
 
March 16, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.2 ppb (2) 23.0 μg/m3 (21) 4.0 μg/m3 (17) 28.0
 
March 16, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) 0.2 ppb (2) 21.0 μg/m3 (19) 3.8 μg/m3 (16) 35.0
 
March 16, 2019, midnight N/A N/A N/A N/A N/A N/A 49.0 ppb (38) 0.1 ppb (1) 13.0 μg/m3 (12) -2.3 μg/m3 (0) 38.0
 
March 15, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) 0.1 ppb (1) 15.0 μg/m3 (14) 3.5 μg/m3 (15) 40.0
 
March 15, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) 0.1 ppb (1) 10.0 μg/m3 (9) 0.4 μg/m3 (2) 42.0
 
March 15, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) 0.1 ppb (1) 11.0 μg/m3 (10) 1.7 μg/m3 (7) 42.0
 
March 15, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) 0.1 ppb (1) 10.0 μg/m3 (9) 2.5 μg/m3 (10) 42.0
 
March 15, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) 0.1 ppb (1) 6.0 μg/m3 (5) 0.2 μg/m3 (1) 41.0
 
March 15, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) 0.1 ppb (1) 4.0 μg/m3 (4) 0.9 μg/m3 (4) 38.0
 
March 15, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) 0.1 ppb (1) 6.0 μg/m3 (5) 2.5 μg/m3 (10) 38.0
 
March 15, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) 0.1 ppb (1) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 36.0
 
March 15, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) 0.1 ppb (1) 6.0 μg/m3 (5) 2.2 μg/m3 (9) 33.0
 
March 15, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) 0.2 ppb (2) 10.0 μg/m3 (9) 2.6 μg/m3 (11) 25.0
 
March 15, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) 0.2 ppb (2) 3.0 μg/m3 (3) -0.6 μg/m3 (0) 15.0
 
March 15, 2019, noon N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.1 ppb (1) 2.0 μg/m3 (2) 0.1 μg/m3 (0) 26.0
 
March 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.1 ppb (1) -2.0 μg/m3 (0) -2.1 μg/m3 (0) 26.0
 
March 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) 0.1 ppb (1) 0.0 μg/m3 (0) -0.8 μg/m3 (0) 27.0
 
March 15, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.1 ppb (1) 0.0 μg/m3 (0) -0.1 μg/m3 (0) 29.0
 
March 15, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.1 ppb (1) 0.0 μg/m3 (0) -1.0 μg/m3 (0) 29.0
 
March 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) 0.1 ppb (1) 6.0 μg/m3 (5) -0.7 μg/m3 (0) 22.0
 
March 15, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) 0.2 ppb (2) 15.0 μg/m3 (14) 5.2 μg/m3 (22) 22.0
 
March 15, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) 0.4 ppb (4) 18.0 μg/m3 (16) 7.4 μg/m3 (31) 31.0
 
March 15, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) 0.4 ppb (4) 12.0 μg/m3 (11) 6.7 μg/m3 (28) 28.0
 
March 15, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) 0.3 ppb (3) 9.0 μg/m3 (8) 5.0 μg/m3 (21) 25.0
 
March 15, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) 0.2 ppb (2) 4.0 μg/m3 (4) 1.7 μg/m3 (7) 32.0
 
March 15, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) 0.1 ppb (1) 3.0 μg/m3 (3) 1.8 μg/m3 (8) 37.0
 
March 15, 2019, midnight N/A N/A N/A N/A N/A N/A 51.0 ppb (39) 0.1 ppb (1) 3.0 μg/m3 (3) 1.6 μg/m3 (7) 39.0
 
March 14, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) 0.1 ppb (1) 1.0 μg/m3 (1) -0.9 μg/m3 (0) 41.0
 
March 14, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) 0.1 ppb (1) 3.0 μg/m3 (3) 0.7 μg/m3 (3) 42.0
 
March 14, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) 0.1 ppb (1) 3.0 μg/m3 (3) 0.8 μg/m3 (3) 41.0
 
March 14, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) 0.1 ppb (1) N/A N/A 38.0
 
March 14, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) 0.2 ppb (2) N/A N/A 35.0
 
March 14, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) 0.1 ppb (1) N/A N/A 32.0
 
March 14, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.1 ppb (1) N/A N/A 28.0
 
March 14, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) 0.3 ppb (3) N/A N/A 20.0
 
March 14, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) 0.3 ppb (3) N/A N/A 13.0
 
March 14, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) 0.3 ppb (3) 13.0 μg/m3 (12) 8.0 μg/m3 (33) 33.0
 
March 14, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) 0.2 ppb (2) 6.0 μg/m3 (5) 3.2 μg/m3 (13) 13.0
 
March 14, 2019, noon N/A N/A N/A N/A N/A N/A 17.0 ppb (13) 0.2 ppb (2) 10.0 μg/m3 (9) 4.1 μg/m3 (17) 17.0
 
March 14, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) 0.2 ppb (2) 10.0 μg/m3 (9) 3.5 μg/m3 (15) 15.0
 
March 14, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) 0.2 ppb (2) 10.0 μg/m3 (9) 3.5 μg/m3 (15) 16.0
 
March 14, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) 0.2 ppb (2) 13.0 μg/m3 (12) 5.7 μg/m3 (24) 24.0