AQSQID: 550790026

Site Name: Milwaukee Ser Dnr

Location: Milwaukee (N 2nd St), WI

Reporting: True, Located: True

Current AQI: 32.0

Milwaukee (N 2nd St) WI, US: 43.0611, -87.9125

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 23, 2019, 9 p.m. 10.7 ppb (10) 1.8 ppb (2) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 12.0 μg/m3 (11) 6.8 μg/m3 (28) 32.0
 
March 23, 2019, 8 p.m. 7.2 ppb (7) 1.1 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 10.0 μg/m3 (9) 5.7 μg/m3 (24) 34.0
 
March 23, 2019, 7 p.m. 7.7 ppb (7) 1.5 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 11.0 μg/m3 (10) 6.5 μg/m3 (27) 33.0
 
March 23, 2019, 6 p.m. 7.2 ppb (7) 1.4 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 11.0 μg/m3 (10) 5.7 μg/m3 (24) 33.0
 
March 23, 2019, 5 p.m. 7.1 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 10.0 μg/m3 (9) 5.9 μg/m3 (25) 32.0
 
March 23, 2019, 4 p.m. 7.8 ppb (7) 1.6 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 10.0 μg/m3 (9) 5.4 μg/m3 (23) 32.0
 
March 23, 2019, 3 p.m. 11.8 ppb (11) 2.7 ppb (3) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 9.0 μg/m3 (8) 5.1 μg/m3 (21) 29.0
 
March 23, 2019, 2 p.m. 23.9 ppb (22) 7.1 ppb (7) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 13.0 μg/m3 (12) 6.5 μg/m3 (27) 27.0
 
March 23, 2019, 1 p.m. 52.2 ppb (48) 22.1 ppb (20) N/A 30.0 ppb (28) N/A 0.0 ppb (0) 15.0 ppb (12) N/A 20.0 μg/m3 (18) 12.2 μg/m3 (50) 50.0
 
March 23, 2019, noon 121.9 ppb (104) 83.9 ppb (82) N/A 38.0 ppb (35) N/A 1.0 ppb (1) 3.0 ppb (2) N/A 29.0 μg/m3 (26) 16.4 μg/m3 (59) 104.0
 
March 23, 2019, 11 a.m. 100.3 ppb (99) 63.8 ppb (60) N/A 37.0 ppb (34) N/A 1.0 ppb (1) 1.0 ppb (1) N/A 22.0 μg/m3 (20) 14.6 μg/m3 (56) 99.0
 
March 23, 2019, 10 a.m. 94.7 ppb (93) 57.3 ppb (54) N/A 37.0 ppb (34) N/A 1.0 ppb (1) 1.0 ppb (1) N/A 23.0 μg/m3 (21) 14.3 μg/m3 (55) 93.0
 
March 23, 2019, 9 a.m. 105.9 ppb (101) 67.5 ppb (64) N/A 38.0 ppb (35) N/A 1.0 ppb (1) 2.0 ppb (2) N/A 23.0 μg/m3 (21) 12.6 μg/m3 (51) 101.0
 
March 23, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 27.0 μg/m3 (25) 11.8 μg/m3 (49) 49.0
 
March 23, 2019, 7 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 2.0 ppb (2) N/A 31.0 μg/m3 (28) 10.6 μg/m3 (44) 44.0
 
March 23, 2019, 6 a.m. 89.8 ppb (88) 51.4 ppb (48) N/A 38.0 ppb (35) N/A 1.0 ppb (1) 2.0 ppb (2) N/A 28.0 μg/m3 (25) 9.1 μg/m3 (38) 88.0
 
March 23, 2019, 5 a.m. 57.9 ppb (54) 21.1 ppb (20) N/A 37.0 ppb (34) N/A 0.0 ppb (0) 2.0 ppb (2) N/A 25.0 μg/m3 (23) 7.9 μg/m3 (33) 54.0
 
March 23, 2019, 4 a.m. 34.4 ppb (32) 4.5 ppb (4) N/A 30.0 ppb (28) N/A 0.0 ppb (0) 8.0 ppb (6) N/A 20.0 μg/m3 (18) 6.1 μg/m3 (25) 32.0
 
March 23, 2019, 3 a.m. 16.6 ppb (15) 0.5 ppb (0) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 26.0 ppb (20) N/A 10.0 μg/m3 (9) 3.8 μg/m3 (16) 20.0
 
March 23, 2019, 2 a.m. 10.7 ppb (10) 0.0 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 8.0 μg/m3 (7) 3.2 μg/m3 (13) 28.0
 
March 23, 2019, 1 a.m. 8.4 ppb (8) -0.2 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 39.0 ppb (30) N/A 7.0 μg/m3 (6) 3.5 μg/m3 (15) 30.0
 
March 23, 2019, midnight 3.6 ppb (3) -0.4 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 6.0 μg/m3 (5) 3.1 μg/m3 (13) 35.0
 
March 22, 2019, 11 p.m. 2.2 ppb (2) -0.5 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 5.0 μg/m3 (5) 2.6 μg/m3 (11) 36.0
 
March 22, 2019, 10 p.m. 3.0 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 4.0 μg/m3 (4) 2.2 μg/m3 (9) 36.0
 
March 22, 2019, 9 p.m. 2.7 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 5.0 μg/m3 (5) 2.3 μg/m3 (10) 36.0
 
March 22, 2019, 8 p.m. 3.0 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 6.0 μg/m3 (5) 2.6 μg/m3 (11) 35.0
 
March 22, 2019, 7 p.m. 2.8 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 7.0 μg/m3 (6) 2.0 μg/m3 (8) 35.0
 
March 22, 2019, 6 p.m. 2.7 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 5.0 μg/m3 (5) 1.7 μg/m3 (7) 35.0
 
March 22, 2019, 5 p.m. 3.1 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 6.0 μg/m3 (5) 1.6 μg/m3 (7) 35.0
 
March 22, 2019, 4 p.m. 3.3 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 7.0 μg/m3 (6) 1.5 μg/m3 (6) 34.0
 
March 22, 2019, 3 p.m. 3.6 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 6.0 μg/m3 (5) 1.3 μg/m3 (5) 33.0
 
March 22, 2019, 2 p.m. 4.9 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 9.0 μg/m3 (8) 3.1 μg/m3 (13) 32.0
 
March 22, 2019, 1 p.m. 17.3 ppb (16) 4.0 ppb (4) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 15.0 μg/m3 (14) 7.1 μg/m3 (30) 30.0
 
March 22, 2019, noon 34.5 ppb (32) 7.2 ppb (7) N/A 27.0 ppb (25) N/A 0.0 ppb (0) 15.0 ppb (12) N/A 27.0 μg/m3 (25) 9.5 μg/m3 (40) 40.0
 
March 22, 2019, 11 a.m. 33.9 ppb (31) 4.8 ppb (4) N/A 29.0 ppb (27) N/A 0.0 ppb (0) 12.0 ppb (9) N/A 16.0 μg/m3 (15) 8.0 μg/m3 (33) 33.0
 
March 22, 2019, 10 a.m. 13.5 ppb (12) 0.6 ppb (1) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 29.0 ppb (22) N/A 11.0 μg/m3 (10) 5.9 μg/m3 (25) 25.0
 
March 22, 2019, 9 a.m. 12.5 ppb (12) 0.5 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 12.0 μg/m3 (11) 7.9 μg/m3 (33) 33.0
 
March 22, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (11) 7.9 μg/m3 (33) 33.0
 
March 22, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) N/A 12.0 μg/m3 (11) 7.8 μg/m3 (32) 32.0
 
March 22, 2019, 6 a.m. 5.9 ppb (5) -0.5 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 11.0 μg/m3 (10) 7.3 μg/m3 (30) 31.0
 
March 22, 2019, 5 a.m. 5.8 ppb (5) -0.2 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 11.0 μg/m3 (10) 6.7 μg/m3 (28) 32.0
 
March 22, 2019, 4 a.m. 5.9 ppb (5) -0.1 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 11.0 μg/m3 (10) 6.2 μg/m3 (26) 32.0
 
March 22, 2019, 3 a.m. 7.2 ppb (7) -0.1 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 39.0 ppb (30) N/A 12.0 μg/m3 (11) 5.5 μg/m3 (23) 30.0
 
March 22, 2019, 2 a.m. 8.0 ppb (7) 0.2 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 39.0 ppb (30) N/A 10.0 μg/m3 (9) 5.3 μg/m3 (22) 30.0
 
March 22, 2019, 1 a.m. 9.7 ppb (9) 0.2 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 39.0 ppb (30) N/A 12.0 μg/m3 (11) 5.4 μg/m3 (23) 30.0
 
March 22, 2019, midnight 12.7 ppb (12) 0.8 ppb (1) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 13.0 μg/m3 (12) 5.3 μg/m3 (22) 28.0
 
March 21, 2019, 11 p.m. 8.6 ppb (8) 0.6 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 11.0 μg/m3 (10) 5.1 μg/m3 (21) 33.0
 
March 21, 2019, 10 p.m. 9.3 ppb (9) 1.5 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 12.0 μg/m3 (11) 5.9 μg/m3 (25) 35.0
 
March 21, 2019, 9 p.m. 8.2 ppb (8) 1.3 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 13.0 μg/m3 (12) 6.5 μg/m3 (27) 35.0
 
March 21, 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 21, 2019, 7 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 21, 2019, 6 p.m. 10.3 ppb (10) 1.6 ppb (1) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 39.0 ppb (30) N/A 15.0 μg/m3 (14) 8.4 μg/m3 (35) 35.0
 
March 21, 2019, 5 p.m. 11.1 ppb (10) 1.6 ppb (1) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 19.0 μg/m3 (17) 11.9 μg/m3 (50) 50.0
 
March 21, 2019, 4 p.m. 9.4 ppb (9) 1.0 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A N/A 29.0
 
March 21, 2019, 3 p.m. 9.0 ppb (8) 1.2 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A N/A 29.0
 
March 21, 2019, 2 p.m. 10.4 ppb (10) 1.2 ppb (1) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 30.0 ppb (23) N/A 22.0 μg/m3 (20) 15.3 μg/m3 (57) 57.0
 
March 21, 2019, 1 p.m. 13.5 ppb (12) 1.5 ppb (1) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 25.0 ppb (19) N/A 27.0 μg/m3 (25) 18.8 μg/m3 (64) 64.0
 
March 21, 2019, noon 12.4 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 24.0 ppb (18) N/A 30.0 μg/m3 (27) 20.7 μg/m3 (69) 69.0
 
March 21, 2019, 11 a.m. 7.3 ppb (7) 0.2 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (22) N/A 30.0 μg/m3 (27) 21.8 μg/m3 (71) 71.0
 
March 21, 2019, 10 a.m. 5.2 ppb (5) -0.2 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 27.0 μg/m3 (25) 21.3 μg/m3 (70) 70.0
 
March 21, 2019, 9 a.m. 5.5 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 23.0 μg/m3 (21) 20.6 μg/m3 (68) 68.0
 
March 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 23.0 μg/m3 (21) 21.1 μg/m3 (69) 69.0
 
March 21, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (25) N/A 23.0 μg/m3 (21) 20.8 μg/m3 (69) 69.0
 
March 21, 2019, 6 a.m. 6.3 ppb (6) -0.2 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 20.0 μg/m3 (18) 18.7 μg/m3 (64) 64.0
 
March 21, 2019, 5 a.m. 6.6 ppb (6) -0.1 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 19.0 μg/m3 (17) 17.1 μg/m3 (61) 61.0
 
March 21, 2019, 4 a.m. 7.1 ppb (7) -0.2 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 18.0 μg/m3 (16) 15.7 μg/m3 (58) 58.0
 
March 21, 2019, 3 a.m. 7.6 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 17.0 μg/m3 (15) 14.0 μg/m3 (54) 54.0
 
March 21, 2019, 2 a.m. 8.4 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 17.0 μg/m3 (15) 13.7 μg/m3 (54) 54.0
 
March 21, 2019, 1 a.m. 15.5 ppb (14) 0.6 ppb (1) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 28.0 ppb (22) N/A 28.0 μg/m3 (25) 20.8 μg/m3 (69) 69.0
 
March 21, 2019, midnight 14.8 ppb (14) 0.5 ppb (0) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 27.0 ppb (21) N/A 31.0 μg/m3 (28) 23.2 μg/m3 (74) 74.0
 
March 20, 2019, 11 p.m. 13.6 ppb (13) 0.9 ppb (1) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 31.0 μg/m3 (28) 22.4 μg/m3 (72) 72.0
 
March 20, 2019, 10 p.m. 15.2 ppb (14) 2.2 ppb (2) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 32.0 μg/m3 (29) 20.2 μg/m3 (67) 67.0
 
March 20, 2019, 9 p.m. 13.5 ppb (12) 1.8 ppb (2) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 29.0 μg/m3 (26) 19.7 μg/m3 (66) 66.0
 
March 20, 2019, 8 p.m. 13.9 ppb (13) 2.7 ppb (3) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 32.0 μg/m3 (29) 20.7 μg/m3 (69) 69.0
 
March 20, 2019, 7 p.m. 12.7 ppb (12) 2.1 ppb (2) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 31.0 μg/m3 (28) 22.5 μg/m3 (72) 72.0
 
March 20, 2019, 6 p.m. 12.8 ppb (12) 2.2 ppb (2) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 30.0 μg/m3 (27) 22.0 μg/m3 (71) 71.0
 
March 20, 2019, 5 p.m. 12.0 ppb (11) 2.1 ppb (2) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 29.0 μg/m3 (26) 20.2 μg/m3 (67) 67.0
 
March 20, 2019, 4 p.m. 12.0 ppb (11) 1.8 ppb (2) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 25.0 μg/m3 (23) 17.5 μg/m3 (62) 62.0
 
March 20, 2019, 3 p.m. 14.7 ppb (14) 3.5 ppb (3) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 25.0 μg/m3 (23) 16.0 μg/m3 (59) 59.0
 
March 20, 2019, 2 p.m. 21.3 ppb (20) 5.1 ppb (5) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 28.0 ppb (22) N/A 25.0 μg/m3 (23) 15.9 μg/m3 (58) 58.0
 
March 20, 2019, 1 p.m. 27.0 ppb (25) 5.5 ppb (5) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 20.0 ppb (15) N/A 24.0 μg/m3 (22) 15.9 μg/m3 (58) 58.0
 
March 20, 2019, noon 27.9 ppb (26) 4.8 ppb (4) N/A 23.0 ppb (21) N/A 0.0 ppb (0) 17.0 ppb (13) N/A 27.0 μg/m3 (25) 17.2 μg/m3 (61) 61.0
 
March 20, 2019, 11 a.m. 21.6 ppb (20) 2.1 ppb (2) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 20.0 ppb (15) N/A 25.0 μg/m3 (23) 17.6 μg/m3 (62) 62.0
 
March 20, 2019, 10 a.m. 17.9 ppb (17) 1.4 ppb (1) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 23.0 ppb (18) N/A 24.0 μg/m3 (22) 18.6 μg/m3 (64) 64.0
 
March 20, 2019, 9 a.m. 14.8 ppb (14) 0.8 ppb (1) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 27.0 ppb (21) N/A 23.0 μg/m3 (21) 18.0 μg/m3 (63) 63.0
 
March 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 21.0 μg/m3 (19) 17.0 μg/m3 (61) 61.0
 
March 20, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 34.0 ppb (26) N/A 20.0 μg/m3 (18) 15.1 μg/m3 (57) 57.0
 
March 20, 2019, 6 a.m. 13.2 ppb (12) 0.5 ppb (0) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 19.0 μg/m3 (17) 13.8 μg/m3 (54) 54.0
 
March 20, 2019, 5 a.m. 14.1 ppb (13) 0.5 ppb (0) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 18.0 μg/m3 (16) 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 4 a.m. 16.4 ppb (15) 0.6 ppb (1) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 17.0 μg/m3 (15) 10.2 μg/m3 (42) 42.0
 
March 20, 2019, 3 a.m. 14.7 ppb (14) 0.5 ppb (0) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 17.0 μg/m3 (15) 9.9 μg/m3 (41) 41.0
 
March 20, 2019, 2 a.m. 14.8 ppb (14) 0.4 ppb (0) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 18.0 μg/m3 (16) 9.6 μg/m3 (40) 40.0
 
March 20, 2019, 1 a.m. 18.3 ppb (17) 0.8 ppb (1) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 19.0 μg/m3 (17) 9.5 μg/m3 (40) 40.0
 
March 20, 2019, midnight 11.1 ppb (10) 0.3 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 15.0 μg/m3 (14) 7.7 μg/m3 (32) 32.0
 
March 19, 2019, 11 p.m. 7.2 ppb (7) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 13.0 μg/m3 (12) 6.5 μg/m3 (27) 35.0
 
March 19, 2019, 10 p.m. 7.7 ppb (7) 0.8 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 15.0 μg/m3 (14) 4.9 μg/m3 (20) 36.0
 
March 19, 2019, 9 p.m. 7.1 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 48.0 ppb (37) N/A 11.0 μg/m3 (10) 4.2 μg/m3 (18) 37.0
 
March 19, 2019, 8 p.m. 8.1 ppb (8) 1.3 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 14.0 μg/m3 (13) 4.5 μg/m3 (19) 35.0
 
March 19, 2019, 7 p.m. 7.3 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 12.0 μg/m3 (11) 4.3 μg/m3 (18) 35.0
 
March 19, 2019, 6 p.m. 6.8 ppb (6) 0.9 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 10.0 μg/m3 (9) 3.5 μg/m3 (15) 36.0
 
March 19, 2019, 5 p.m. 6.6 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 10.0 μg/m3 (9) 4.2 μg/m3 (18) 36.0
 
March 19, 2019, 4 p.m. 10.9 ppb (10) 2.3 ppb (2) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 16.0 μg/m3 (15) 7.0 μg/m3 (29) 34.0
 
March 19, 2019, 3 p.m. 15.0 ppb (14) 3.4 ppb (3) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 19.0 μg/m3 (17) 9.4 μg/m3 (39) 39.0
 
March 19, 2019, 2 p.m. 23.9 ppb (22) 6.9 ppb (6) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 24.0 μg/m3 (22) 10.6 μg/m3 (44) 44.0
 
March 19, 2019, 1 p.m. 47.3 ppb (44) 18.3 ppb (17) N/A 29.0 ppb (27) N/A 0.0 ppb (0) 15.0 ppb (12) N/A 35.0 μg/m3 (32) 12.9 μg/m3 (52) 52.0
 
March 19, 2019, noon 69.1 ppb (66) 30.6 ppb (28) N/A 39.0 ppb (36) N/A 0.0 ppb (0) 4.0 ppb (3) N/A 36.0 μg/m3 (33) 13.8 μg/m3 (54) 66.0
 
March 19, 2019, 11 a.m. 57.1 ppb (53) 18.3 ppb (17) N/A 39.0 ppb (36) N/A 0.0 ppb (0) 2.0 ppb (2) N/A 28.0 μg/m3 (25) 12.0 μg/m3 (50) 53.0
 
March 19, 2019, 10 a.m. 38.6 ppb (36) 5.9 ppb (5) N/A 33.0 ppb (31) N/A 0.0 ppb (0) 7.0 ppb (5) N/A 20.0 μg/m3 (18) 10.6 μg/m3 (44) 44.0
 
March 19, 2019, 9 a.m. 28.9 ppb (27) 2.3 ppb (2) N/A 27.0 ppb (25) N/A 0.0 ppb (0) 14.0 ppb (11) N/A 18.0 μg/m3 (16) 11.2 μg/m3 (47) 47.0
 
March 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 18.0 μg/m3 (16) 13.0 μg/m3 (52) 52.0
 
March 19, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 11.0 ppb (8) N/A 24.0 μg/m3 (22) 16.2 μg/m3 (59) 59.0
 
March 19, 2019, 6 a.m. 38.5 ppb (36) 3.2 ppb (3) N/A 35.0 ppb (32) N/A 0.0 ppb (0) 13.0 ppb (10) N/A 25.0 μg/m3 (23) 16.2 μg/m3 (59) 59.0
 
March 19, 2019, 5 a.m. 29.4 ppb (27) 1.5 ppb (1) N/A 28.0 ppb (26) N/A 0.0 ppb (0) 22.0 ppb (17) N/A 23.0 μg/m3 (21) 15.9 μg/m3 (58) 58.0
 
March 19, 2019, 4 a.m. 19.7 ppb (18) 0.5 ppb (0) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 25.0 μg/m3 (23) 16.5 μg/m3 (60) 60.0
 
March 19, 2019, 3 a.m. 18.9 ppb (18) 0.6 ppb (1) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 22.0 μg/m3 (20) 15.1 μg/m3 (57) 57.0
 
March 19, 2019, 2 a.m. 17.3 ppb (16) 0.6 ppb (1) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 23.0 μg/m3 (21) 15.8 μg/m3 (58) 58.0
 
March 19, 2019, 1 a.m. 28.0 ppb (26) 1.7 ppb (2) N/A 26.0 ppb (24) N/A 0.0 ppb (0) 24.0 ppb (18) N/A 31.0 μg/m3 (28) 15.5 μg/m3 (57) 57.0
 
March 19, 2019, midnight 20.0 ppb (19) 0.7 ppb (1) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 30.0 ppb (23) N/A 26.0 μg/m3 (24) 13.3 μg/m3 (53) 53.0
 
March 18, 2019, 11 p.m. 7.7 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 20.0 μg/m3 (18) 12.2 μg/m3 (50) 50.0
 
March 18, 2019, 10 p.m. 8.0 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 19.0 μg/m3 (17) 11.1 μg/m3 (46) 46.0
 
March 18, 2019, 9 p.m. 7.6 ppb (7) 0.9 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 20.0 μg/m3 (18) 11.5 μg/m3 (48) 48.0
 
March 18, 2019, 8 p.m. 8.2 ppb (8) 1.3 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 48.0 ppb (37) N/A 18.0 μg/m3 (16) 11.6 μg/m3 (48) 48.0
 
March 18, 2019, 7 p.m. 9.1 ppb (8) 1.6 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 21.0 μg/m3 (19) 11.3 μg/m3 (47) 47.0
 
March 18, 2019, 6 p.m. 9.2 ppb (9) 1.4 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 20.0 μg/m3 (18) 12.3 μg/m3 (51) 51.0
 
March 18, 2019, 5 p.m. 8.4 ppb (8) 1.4 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 16.0 μg/m3 (15) 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 4 p.m. 9.3 ppb (9) 1.8 ppb (2) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 20.0 μg/m3 (18) 11.8 μg/m3 (49) 49.0
 
March 18, 2019, 3 p.m. 11.9 ppb (11) 2.7 ppb (3) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 39.0 ppb (30) N/A 24.0 μg/m3 (22) 14.8 μg/m3 (56) 56.0
 
March 18, 2019, 2 p.m. 15.0 ppb (14) 3.6 ppb (3) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 27.0 μg/m3 (25) 17.8 μg/m3 (62) 62.0
 
March 18, 2019, 1 p.m. 22.8 ppb (21) 5.0 ppb (5) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 28.0 ppb (22) N/A 30.0 μg/m3 (27) 19.6 μg/m3 (66) 66.0
 
March 18, 2019, noon 28.1 ppb (26) 4.5 ppb (4) N/A 24.0 ppb (22) N/A 0.0 ppb (0) 20.0 ppb (15) N/A 31.0 μg/m3 (28) 20.2 μg/m3 (67) 67.0
 
March 18, 2019, 11 a.m. 19.8 ppb (18) 1.3 ppb (1) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 25.0 ppb (19) N/A 24.0 μg/m3 (22) 20.1 μg/m3 (67) 67.0
 
March 18, 2019, 10 a.m. 14.1 ppb (13) 0.7 ppb (1) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 30.0 ppb (23) N/A 22.0 μg/m3 (20) 18.4 μg/m3 (64) 64.0
 
March 18, 2019, 9 a.m. 14.8 ppb (14) 0.7 ppb (1) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 20.0 μg/m3 (18) 18.0 μg/m3 (63) 63.0
 
March 18, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 21.0 μg/m3 (19) 17.3 μg/m3 (61) 61.0
 
March 18, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) N/A 21.0 μg/m3 (19) 16.8 μg/m3 (60) 60.0
 
March 18, 2019, 6 a.m. 8.1 ppb (8) 0.1 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 39.0 ppb (30) N/A 19.0 μg/m3 (17) 14.6 μg/m3 (56) 56.0
 
March 18, 2019, 5 a.m. 17.0 ppb (16) 0.9 ppb (1) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 29.0 ppb (22) N/A 21.0 μg/m3 (19) 9.6 μg/m3 (40) 40.0
 
March 18, 2019, 4 a.m. 21.0 ppb (19) 1.2 ppb (1) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 25.0 ppb (19) N/A 20.0 μg/m3 (18) 9.4 μg/m3 (39) 39.0
 
March 18, 2019, 3 a.m. 21.2 ppb (20) 0.9 ppb (1) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 25.0 ppb (19) N/A 21.0 μg/m3 (19) 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 2 a.m. 26.5 ppb (25) 2.2 ppb (2) N/A 24.0 ppb (22) N/A 0.0 ppb (0) 23.0 ppb (18) N/A 21.0 μg/m3 (19) 8.3 μg/m3 (35) 35.0
 
March 18, 2019, 1 a.m. 35.7 ppb (33) 4.7 ppb (4) N/A 31.0 ppb (29) N/A 0.0 ppb (0) 16.0 ppb (12) N/A 25.0 μg/m3 (23) 9.2 μg/m3 (38) 38.0
 
March 18, 2019, midnight 11.1 ppb (10) -0.1 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 17.0 μg/m3 (15) 7.1 μg/m3 (30) 30.0
 
March 17, 2019, 11 p.m. 5.0 ppb (5) -0.3 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 14.0 μg/m3 (13) 7.5 μg/m3 (31) 35.0
 
March 17, 2019, 10 p.m. 4.5 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 48.0 ppb (37) N/A 12.0 μg/m3 (11) 7.6 μg/m3 (32) 37.0
 
March 17, 2019, 9 p.m. 3.8 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 49.0 ppb (38) N/A 11.0 μg/m3 (10) 6.5 μg/m3 (27) 38.0
 
March 17, 2019, 8 p.m. 4.1 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 49.0 ppb (38) N/A 13.0 μg/m3 (12) 7.9 μg/m3 (33) 38.0
 
March 17, 2019, 7 p.m. 4.3 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 48.0 ppb (37) N/A 15.0 μg/m3 (14) 9.2 μg/m3 (38) 38.0
 
March 17, 2019, 6 p.m. 4.2 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 12.0 μg/m3 (11) 7.2 μg/m3 (30) 36.0
 
March 17, 2019, 5 p.m. 4.6 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 10.0 μg/m3 (9) 7.1 μg/m3 (30) 35.0
 
March 17, 2019, 4 p.m. 5.1 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 11.0 μg/m3 (10) 6.5 μg/m3 (27) 34.0
 
March 17, 2019, 3 p.m. 5.5 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 11.0 μg/m3 (10) 7.0 μg/m3 (29) 32.0
 
March 17, 2019, 2 p.m. 13.8 ppb (13) 3.3 ppb (3) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 16.0 μg/m3 (15) 11.0 μg/m3 (46) 46.0
 
March 17, 2019, 1 p.m. 20.2 ppb (19) 4.3 ppb (4) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 22.0 ppb (17) N/A 19.0 μg/m3 (17) 15.5 μg/m3 (57) 57.0
 
March 17, 2019, noon 23.7 ppb (22) 3.5 ppb (3) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 16.0 ppb (12) N/A 20.0 μg/m3 (18) 17.4 μg/m3 (61) 61.0
 
March 17, 2019, 11 a.m. 16.7 ppb (15) 0.9 ppb (1) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 23.0 ppb (18) N/A 17.0 μg/m3 (15) 15.1 μg/m3 (57) 57.0
 
March 17, 2019, 10 a.m. 11.8 ppb (11) 0.5 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 13.0 μg/m3 (12) 11.2 μg/m3 (47) 47.0
 
March 17, 2019, 9 a.m. 11.8 ppb (11) 0.5 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 11.0 μg/m3 (10) 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (10) 8.4 μg/m3 (35) 35.0
 
March 17, 2019, 7 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) N/A 10.0 μg/m3 (9) 7.4 μg/m3 (31) 31.0
 
March 17, 2019, 6 a.m. 11.4 ppb (11) 0.2 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 10.0 μg/m3 (9) 6.8 μg/m3 (28) 28.0
 
March 17, 2019, 5 a.m. 10.6 ppb (10) 0.0 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 10.0 μg/m3 (9) 5.5 μg/m3 (23) 27.0
 
March 17, 2019, 4 a.m. 12.2 ppb (11) 0.0 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 9.0 μg/m3 (8) 4.8 μg/m3 (20) 25.0
 
March 17, 2019, 3 a.m. 9.0 ppb (8) -0.1 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 8.0 μg/m3 (7) 4.2 μg/m3 (18) 28.0
 
March 17, 2019, 2 a.m. 5.8 ppb (5) -0.3 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 7.0 μg/m3 (6) 3.6 μg/m3 (15) 31.0
 
March 17, 2019, 1 a.m. 4.7 ppb (4) -0.4 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 7.0 μg/m3 (6) 3.5 μg/m3 (15) 32.0
 
March 17, 2019, midnight 3.4 ppb (3) -0.3 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 8.0 μg/m3 (7) 3.5 μg/m3 (15) 33.0
 
March 16, 2019, 11 p.m. 2.7 ppb (3) -0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 6.0 μg/m3 (5) 3.6 μg/m3 (15) 35.0
 
March 16, 2019, 10 p.m. 2.9 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 7.0 μg/m3 (6) 3.8 μg/m3 (16) 35.0