AQSQID: 130890002

Site Name: South Dekalb

Location: DeKalb Co, GA

Reporting: True, Located: True

Current AQI: 29.0

DeKalb Co GA, US: 33.6906, -84.2731

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 19, 2019, 2 p.m. 3.6 ppb (3) 0.4 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (32) 0.09 ppb (1) N/A N/A 32.0
 
March 19, 2019, 1 p.m. 6.0 ppb (6) 0.4 ppb (0) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 38.0 ppb (29) 0.12 ppb (1) 12.0 μg/m3 (11) 5.6 μg/m3 (23) 29.0
 
March 19, 2019, noon 12.7 ppb (12) 0.5 ppb (0) 13.0 ppb (12) 12.0 ppb (11) N/A 0.0 ppb (0) 28.0 ppb (22) 0.18 ppb (2) 10.0 μg/m3 (9) 6.2 μg/m3 (26) 26.0
 
March 19, 2019, 11 a.m. 27.3 ppb (25) 2.4 ppb (2) 25.0 ppb (23) 25.0 ppb (23) N/A 0.0 ppb (0) 12.0 ppb (9) 0.23 ppb (3) 11.0 μg/m3 (10) 7.1 μg/m3 (30) 30.0
 
March 19, 2019, 10 a.m. 33.6 ppb (31) 5.2 ppb (5) 38.0 ppb (35) 29.0 ppb (27) N/A 0.0 ppb (0) 1.0 ppb (1) 0.24 ppb (3) 12.0 μg/m3 (11) 7.6 μg/m3 (32) 35.0
 
March 19, 2019, 9 a.m. 43.8 ppb (41) 15.1 ppb (14) 49.0 ppb (45) 29.0 ppb (27) N/A 0.0 ppb (0) 1.0 ppb (1) 0.26 ppb (3) 11.0 μg/m3 (10) 7.4 μg/m3 (31) 45.0
 
March 19, 2019, 8 a.m. 17.2 ppb (16) 0.2 ppb (0) 21.0 ppb (19) 17.0 ppb (16) N/A 0.0 ppb (0) 13.0 ppb (10) 0.2 ppb (2) 9.0 μg/m3 (8) 6.2 μg/m3 (26) 26.0
 
March 19, 2019, 7 a.m. 10.2 ppb (9) -0.2 ppb (0) 12.0 ppb (11) 10.0 ppb (9) N/A 0.0 ppb (0) 22.0 ppb (17) N/A 10.0 μg/m3 (9) 5.9 μg/m3 (25) 25.0
 
March 19, 2019, 6 a.m. 11.8 ppb (11) -0.2 ppb (0) 12.0 ppb (11) 12.0 ppb (11) N/A 0.0 ppb (0) 24.0 ppb (18) N/A 8.0 μg/m3 (7) 5.2 μg/m3 (22) 22.0
 
March 19, 2019, 5 a.m. 14.1 ppb (13) -0.2 ppb (0) 14.0 ppb (13) 14.0 ppb (13) N/A 0.0 ppb (0) 25.0 ppb (19) 0.19 ppb (2) 8.0 μg/m3 (7) 5.4 μg/m3 (23) 23.0
 
March 19, 2019, 4 a.m. 17.4 ppb (16) -0.2 ppb (0) 17.0 ppb (16) 18.0 ppb (17) N/A 0.0 ppb (0) 27.0 ppb (21) 0.21 ppb (2) N/A N/A 21.0
 
March 19, 2019, 3 a.m. 9.7 ppb (9) -0.2 ppb (0) 10.0 ppb (9) 10.0 ppb (9) N/A 0.0 ppb (0) 36.0 ppb (28) 0.18 ppb (2) 7.0 μg/m3 (6) 4.3 μg/m3 (18) 28.0
 
March 19, 2019, 2 a.m. 9.9 ppb (9) -0.3 ppb (0) 10.0 ppb (9) 10.0 ppb (9) N/A 0.0 ppb (0) 36.0 ppb (28) 0.17 ppb (2) 8.0 μg/m3 (7) 4.4 μg/m3 (18) 28.0
 
March 19, 2019, 1 a.m. 9.5 ppb (9) -0.3 ppb (0) 9.0 ppb (8) 10.0 ppb (9) N/A 0.0 ppb (0) 37.0 ppb (28) 0.17 ppb (2) 8.0 μg/m3 (7) 3.9 μg/m3 (16) 28.0
 
March 19, 2019, midnight 8.6 ppb (8) -0.2 ppb (0) 9.0 ppb (8) 9.0 ppb (8) N/A 0.0 ppb (0) 39.0 ppb (30) 0.18 ppb (2) 8.0 μg/m3 (7) 3.8 μg/m3 (16) 30.0
 
March 18, 2019, 11 p.m. 6.6 ppb (6) -0.2 ppb (0) 7.0 ppb (6) 7.0 ppb (6) N/A 0.0 ppb (0) 42.0 ppb (32) 0.18 ppb (2) 7.0 μg/m3 (6) 3.5 μg/m3 (15) 32.0
 
March 18, 2019, 10 p.m. 5.5 ppb (5) 0.1 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 44.0 ppb (34) 0.17 ppb (2) 8.0 μg/m3 (7) 4.1 μg/m3 (17) 34.0
 
March 18, 2019, 9 p.m. 5.1 ppb (5) 0.5 ppb (0) 4.0 ppb (4) 5.0 ppb (5) N/A 0.0 ppb (0) 49.0 ppb (38) 0.35 ppb (4) 18.0 μg/m3 (16) 7.2 μg/m3 (30) 38.0
 
March 18, 2019, 8 p.m. 5.3 ppb (5) 0.5 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 49.0 ppb (38) 0.16 ppb (2) 12.0 μg/m3 (11) 6.1 μg/m3 (25) 38.0
 
March 18, 2019, 7 p.m. 4.5 ppb (4) 0.5 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 49.0 ppb (38) 0.15 ppb (2) 10.0 μg/m3 (9) 4.6 μg/m3 (19) 38.0
 
March 18, 2019, 6 p.m. 5.4 ppb (5) 0.8 ppb (1) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 48.0 ppb (37) 0.16 ppb (2) 11.0 μg/m3 (10) 4.2 μg/m3 (18) 37.0
 
March 18, 2019, 5 p.m. 5.5 ppb (5) 0.9 ppb (1) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 47.0 ppb (36) 0.16 ppb (2) 9.0 μg/m3 (8) 3.9 μg/m3 (16) 36.0
 
March 18, 2019, 4 p.m. 5.1 ppb (5) 0.8 ppb (1) 5.0 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 46.0 ppb (35) 0.17 ppb (2) 7.0 μg/m3 (6) 3.6 μg/m3 (15) 35.0
 
March 18, 2019, 3 p.m. 7.3 ppb (7) 1.3 ppb (1) 7.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 43.0 ppb (33) 0.18 ppb (2) 8.0 μg/m3 (7) 3.7 μg/m3 (15) 33.0
 
March 18, 2019, 2 p.m. 10.3 ppb (10) 1.9 ppb (2) 10.0 ppb (9) 8.0 ppb (7) N/A 0.0 ppb (0) 39.0 ppb (30) 0.21 ppb (2) 10.0 μg/m3 (9) 4.8 μg/m3 (20) 30.0
 
March 18, 2019, 1 p.m. 18.4 ppb (17) 3.4 ppb (3) 18.0 ppb (17) 15.0 ppb (14) N/A 1.0 ppb (1) 29.0 ppb (22) 0.27 ppb (3) 11.0 μg/m3 (10) 6.3 μg/m3 (26) 26.0
 
March 18, 2019, noon 67.3 ppb (64) 36.2 ppb (34) 47.0 ppb (44) 31.0 ppb (29) N/A 1.0 ppb (1) 5.0 ppb (4) 0.49 ppb (5) 12.0 μg/m3 (11) 7.0 μg/m3 (29) 64.0
 
March 18, 2019, 11 a.m. 58.5 ppb (55) 25.4 ppb (24) 56.0 ppb (52) 33.0 ppb (31) N/A 0.0 ppb (0) 2.0 ppb (2) 0.39 ppb (4) 11.0 μg/m3 (10) 6.7 μg/m3 (28) 55.0
 
March 18, 2019, 10 a.m. 31.5 ppb (29) 3.0 ppb (3) 26.0 ppb (24) 29.0 ppb (27) N/A 0.0 ppb (0) 7.0 ppb (5) 0.33 ppb (4) 11.0 μg/m3 (10) 6.8 μg/m3 (28) 29.0
 
March 18, 2019, 9 a.m. 62.2 ppb (59) 38.5 ppb (36) N/A 24.0 ppb (22) N/A 1.0 ppb (1) 0.0 ppb (0) 0.59 ppb (7) 15.0 μg/m3 (14) 9.2 μg/m3 (38) 59.0
 
March 18, 2019, 8 a.m. 45.4 ppb (42) 25.4 ppb (24) N/A 20.0 ppb (19) N/A 0.0 ppb (0) N/A 0.6 ppb (7) 16.0 μg/m3 (15) 10.7 μg/m3 (45) 45.0
 
March 18, 2019, 7 a.m. 47.9 ppb (44) 26.3 ppb (24) N/A 22.0 ppb (20) N/A 0.0 ppb (0) N/A N/A 19.0 μg/m3 (17) 13.5 μg/m3 (53) 53.0
 
March 18, 2019, 6 a.m. 41.2 ppb (38) 17.3 ppb (16) 41.0 ppb (38) 24.0 ppb (22) N/A 0.0 ppb (0) 0.0 ppb (0) N/A 17.0 μg/m3 (15) 10.8 μg/m3 (45) 45.0
 
March 18, 2019, 5 a.m. 41.4 ppb (38) 15.3 ppb (14) 43.0 ppb (40) 26.0 ppb (24) N/A 0.0 ppb (0) 0.0 ppb (0) 0.57 ppb (6) 14.0 μg/m3 (13) 9.1 μg/m3 (38) 40.0
 
March 18, 2019, 4 a.m. 36.3 ppb (34) 9.4 ppb (9) 38.0 ppb (35) 27.0 ppb (25) N/A 0.0 ppb (0) 0.0 ppb (0) 0.54 ppb (6) N/A N/A 35.0
 
March 18, 2019, 3 a.m. 42.0 ppb (39) 10.7 ppb (10) 43.0 ppb (40) 31.0 ppb (29) N/A 0.0 ppb (0) 0.0 ppb (0) 0.55 ppb (6) 12.0 μg/m3 (11) 6.7 μg/m3 (28) 40.0
 
March 18, 2019, 2 a.m. 51.6 ppb (48) 13.6 ppb (13) 64.0 ppb (61) 38.0 ppb (35) N/A N/A 1.0 ppb (1) 0.6 ppb (7) 16.0 μg/m3 (15) 8.3 μg/m3 (35) 61.0
 
March 18, 2019, 1 a.m. 26.1 ppb (24) 0.0 ppb (0) 26.0 ppb (24) 26.0 ppb (24) N/A N/A 16.0 ppb (12) 0.52 ppb (6) 15.0 μg/m3 (14) 10.3 μg/m3 (43) 43.0
 
March 18, 2019, midnight 13.2 ppb (12) -0.3 ppb (0) 14.0 ppb (13) 14.0 ppb (13) N/A N/A 37.0 ppb (28) 0.31 ppb (3) 11.0 μg/m3 (10) 6.5 μg/m3 (27) 28.0
 
March 17, 2019, 11 p.m. N/A N/A 5.0 ppb (5) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.22 ppb (2) 8.0 μg/m3 (7) 4.2 μg/m3 (18) 35.0
 
March 17, 2019, 10 p.m. N/A N/A 3.0 ppb (3) N/A N/A 0.0 ppb (0) 47.0 ppb (36) 0.2 ppb (2) 7.0 μg/m3 (6) 3.8 μg/m3 (16) 36.0
 
March 17, 2019, 9 p.m. N/A N/A 3.0 ppb (3) N/A N/A 0.0 ppb (0) 50.0 ppb (38) 0.19 ppb (2) 7.0 μg/m3 (6) 3.8 μg/m3 (16) 38.0
 
March 17, 2019, 8 p.m. N/A N/A 4.0 ppb (4) N/A N/A 0.0 ppb (0) 52.0 ppb (40) 0.21 ppb (2) 9.0 μg/m3 (8) 5.1 μg/m3 (21) 40.0
 
March 17, 2019, 7 p.m. N/A N/A 4.0 ppb (4) N/A N/A 0.0 ppb (0) 51.0 ppb (39) 0.22 ppb (2) 9.0 μg/m3 (8) 4.8 μg/m3 (20) 39.0
 
March 17, 2019, 6 p.m. 3.3 ppb (3) 0.2 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) 0.21 ppb (2) 9.0 μg/m3 (8) 4.1 μg/m3 (17) 38.0
 
March 17, 2019, 5 p.m. 2.9 ppb (3) 0.2 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) 0.21 ppb (2) 7.0 μg/m3 (6) 3.8 μg/m3 (16) 36.0
 
March 17, 2019, 4 p.m. 2.5 ppb (2) 0.1 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) 0.2 ppb (2) 6.0 μg/m3 (5) 3.5 μg/m3 (15) 35.0
 
March 17, 2019, 3 p.m. 4.3 ppb (4) 0.6 ppb (1) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 41.0 ppb (32) 0.23 ppb (3) 7.0 μg/m3 (6) 3.7 μg/m3 (15) 32.0
 
March 17, 2019, 2 p.m. 8.3 ppb (8) 1.3 ppb (1) 8.0 ppb (7) 7.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (25) 0.27 ppb (3) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 25.0
 
March 17, 2019, 1 p.m. 9.7 ppb (9) 1.7 ppb (2) 11.0 ppb (10) 8.0 ppb (7) N/A 0.0 ppb (0) 19.0 ppb (15) 0.28 ppb (3) 8.0 μg/m3 (7) 4.3 μg/m3 (18) 18.0
 
March 17, 2019, noon 8.6 ppb (8) 0.7 ppb (1) 9.0 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 14.0 ppb (11) 0.27 ppb (3) 8.0 μg/m3 (7) 4.6 μg/m3 (19) 19.0
 
March 17, 2019, 11 a.m. 6.0 ppb (6) -0.2 ppb (0) 7.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 20.0 ppb (15) 0.25 ppb (3) 7.0 μg/m3 (6) 4.5 μg/m3 (19) 19.0
 
March 17, 2019, 10 a.m. 4.8 ppb (4) -0.3 ppb (0) 6.0 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 20.0 ppb (15) 0.24 ppb (3) 7.0 μg/m3 (6) 4.1 μg/m3 (17) 17.0
 
March 17, 2019, 9 a.m. 5.2 ppb (5) -0.3 ppb (0) 7.0 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 22.0 ppb (17) 0.22 ppb (2) 7.0 μg/m3 (6) 4.1 μg/m3 (17) 17.0
 
March 17, 2019, 8 a.m. 5.2 ppb (5) -0.3 ppb (0) 6.0 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 28.0 ppb (22) 0.22 ppb (2) 7.0 μg/m3 (6) 4.3 μg/m3 (18) 22.0
 
March 17, 2019, 7 a.m. 5.0 ppb (5) -0.3 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 29.0 ppb (22) N/A 8.0 μg/m3 (7) 4.5 μg/m3 (19) 22.0
 
March 17, 2019, 6 a.m. 5.2 ppb (5) -0.3 ppb (0) 5.0 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 8.0 μg/m3 (7) 4.5 μg/m3 (19) 24.0
 
March 17, 2019, 5 a.m. 5.6 ppb (5) -0.3 ppb (0) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 29.0 ppb (22) 0.16 ppb (2) 8.0 μg/m3 (7) 4.6 μg/m3 (19) 22.0
 
March 17, 2019, 4 a.m. 6.8 ppb (6) -0.3 ppb (0) 7.0 ppb (6) 7.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (23) 0.19 ppb (2) N/A N/A 23.0
 
March 17, 2019, 3 a.m. 8.0 ppb (7) -0.2 ppb (0) 8.0 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 28.0 ppb (22) 0.21 ppb (2) 8.0 μg/m3 (7) 5.2 μg/m3 (22) 22.0
 
March 17, 2019, 2 a.m. 7.9 ppb (7) -0.2 ppb (0) 8.0 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 30.0 ppb (23) 0.22 ppb (2) 9.0 μg/m3 (8) 5.4 μg/m3 (23) 23.0
 
March 17, 2019, 1 a.m. 8.0 ppb (7) -0.3 ppb (0) 8.0 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 31.0 ppb (24) 0.22 ppb (2) 8.0 μg/m3 (7) 4.5 μg/m3 (19) 24.0
 
March 17, 2019, midnight 7.1 ppb (7) -0.3 ppb (0) 7.0 ppb (6) 7.0 ppb (6) N/A 0.0 ppb (0) 35.0 ppb (27) 0.2 ppb (2) 8.0 μg/m3 (7) 4.4 μg/m3 (18) 27.0
 
March 16, 2019, 11 p.m. 5.6 ppb (5) -0.2 ppb (0) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (28) 0.17 ppb (2) 7.0 μg/m3 (6) 3.8 μg/m3 (16) 28.0
 
March 16, 2019, 10 p.m. 5.5 ppb (5) 0.1 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 39.0 ppb (30) 0.17 ppb (2) 8.0 μg/m3 (7) 4.0 μg/m3 (17) 30.0
 
March 16, 2019, 9 p.m. 4.5 ppb (4) 0.2 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (31) 0.17 ppb (2) 8.0 μg/m3 (7) 4.3 μg/m3 (18) 31.0
 
March 16, 2019, 8 p.m. 4.5 ppb (4) 0.3 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (31) 0.16 ppb (2) 8.0 μg/m3 (7) 4.7 μg/m3 (20) 31.0
 
March 16, 2019, 7 p.m. 4.7 ppb (4) 0.5 ppb (0) 5.0 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (31) 0.16 ppb (2) 8.0 μg/m3 (7) 4.7 μg/m3 (20) 31.0
 
March 16, 2019, 6 p.m. 4.4 ppb (4) 0.5 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (31) 0.16 ppb (2) 8.0 μg/m3 (7) 4.4 μg/m3 (18) 31.0
 
March 16, 2019, 5 p.m. 4.3 ppb (4) 0.5 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (31) 0.16 ppb (2) 8.0 μg/m3 (7) 4.2 μg/m3 (18) 31.0
 
March 16, 2019, 4 p.m. 4.3 ppb (4) 0.5 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 39.0 ppb (30) 0.16 ppb (2) 7.0 μg/m3 (6) 3.7 μg/m3 (15) 30.0
 
March 16, 2019, 3 p.m. 5.1 ppb (5) 0.7 ppb (1) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (28) 0.17 ppb (2) 7.0 μg/m3 (6) 4.1 μg/m3 (17) 28.0
 
March 16, 2019, 2 p.m. 5.2 ppb (5) 0.4 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 36.0 ppb (28) 0.17 ppb (2) 8.0 μg/m3 (7) 4.3 μg/m3 (18) 28.0
 
March 16, 2019, 1 p.m. 6.0 ppb (6) 0.4 ppb (0) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 35.0 ppb (27) 0.17 ppb (2) 7.0 μg/m3 (6) 3.6 μg/m3 (15) 27.0
 
March 16, 2019, noon 6.6 ppb (6) 0.0 ppb (0) 6.0 ppb (6) 7.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) 0.19 ppb (2) 8.0 μg/m3 (7) 4.1 μg/m3 (17) 25.0
 
March 16, 2019, 11 a.m. 5.5 ppb (5) -0.2 ppb (0) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (25) 0.2 ppb (2) 7.0 μg/m3 (6) 3.9 μg/m3 (16) 25.0
 
March 16, 2019, 10 a.m. 4.0 ppb (4) -0.3 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) 0.19 ppb (2) 6.0 μg/m3 (5) 4.0 μg/m3 (17) 27.0
 
March 16, 2019, 9 a.m. 2.9 ppb (3) -0.3 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) 0.19 ppb (2) 7.0 μg/m3 (6) 4.1 μg/m3 (17) 28.0
 
March 16, 2019, 8 a.m. 2.3 ppb (2) -0.3 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) 0.17 ppb (2) 7.0 μg/m3 (6) 4.1 μg/m3 (17) 28.0
 
March 16, 2019, 7 a.m. 2.4 ppb (2) -0.3 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 7.0 μg/m3 (6) 4.0 μg/m3 (17) 28.0
 
March 16, 2019, 6 a.m. 2.3 ppb (2) -0.3 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 7.0 μg/m3 (6) 3.9 μg/m3 (16) 28.0
 
March 16, 2019, 5 a.m. 2.4 ppb (2) -0.3 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) 0.1 ppb (1) 9.0 μg/m3 (8) 4.0 μg/m3 (17) 28.0
 
March 16, 2019, 4 a.m. 3.9 ppb (4) -0.3 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) 0.1 ppb (1) N/A N/A 27.0
 
March 16, 2019, 3 a.m. 3.7 ppb (3) -0.3 ppb (0) 3.0 ppb (3) 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (28) 0.1 ppb (1) 9.0 μg/m3 (8) 4.2 μg/m3 (18) 28.0
 
March 16, 2019, 2 a.m. 4.0 ppb (4) -0.3 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 38.0 ppb (29) 0.1 ppb (1) 10.0 μg/m3 (9) 4.6 μg/m3 (19) 29.0
 
March 16, 2019, 1 a.m. 4.8 ppb (4) -0.3 ppb (0) 4.0 ppb (4) 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (28) 0.11 ppb (1) 11.0 μg/m3 (10) 5.1 μg/m3 (21) 28.0
 
March 16, 2019, midnight 6.1 ppb (6) -0.3 ppb (0) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 35.0 ppb (27) 0.13 ppb (1) 11.0 μg/m3 (10) 4.7 μg/m3 (20) 27.0
 
March 15, 2019, 11 p.m. 4.6 ppb (4) -0.2 ppb (0) 4.0 ppb (4) 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (28) 0.12 ppb (1) 12.0 μg/m3 (11) 4.3 μg/m3 (18) 28.0
 
March 15, 2019, 10 p.m. 5.8 ppb (5) 0.1 ppb (0) 5.0 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 34.0 ppb (26) 0.14 ppb (2) 14.0 μg/m3 (13) 4.6 μg/m3 (19) 26.0
 
March 15, 2019, 9 p.m. 5.6 ppb (5) 0.4 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 33.0 ppb (25) 0.13 ppb (1) 15.0 μg/m3 (14) 5.1 μg/m3 (21) 25.0
 
March 15, 2019, 8 p.m. 5.4 ppb (5) 0.4 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 31.0 ppb (24) 0.14 ppb (2) 15.0 μg/m3 (14) 5.5 μg/m3 (23) 24.0
 
March 15, 2019, 7 p.m. 6.2 ppb (6) 0.8 ppb (1) 6.0 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 30.0 ppb (23) 0.16 ppb (2) 17.0 μg/m3 (15) 6.1 μg/m3 (25) 25.0
 
March 15, 2019, 6 p.m. 6.3 ppb (6) 0.9 ppb (1) 6.0 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 29.0 ppb (22) 0.15 ppb (2) 19.0 μg/m3 (17) 6.1 μg/m3 (25) 25.0
 
March 15, 2019, 5 p.m. 9.4 ppb (9) 1.6 ppb (1) 9.0 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 26.0 ppb (20) 0.17 ppb (2) 17.0 μg/m3 (15) 6.7 μg/m3 (28) 28.0
 
March 15, 2019, 4 p.m. 9.7 ppb (9) 0.6 ppb (1) 9.0 ppb (8) 9.0 ppb (8) N/A 0.0 ppb (0) 26.0 ppb (20) 0.16 ppb (2) 19.0 μg/m3 (17) 6.7 μg/m3 (28) 28.0
 
March 15, 2019, 3 p.m. 11.8 ppb (11) 0.6 ppb (1) 11.0 ppb (10) 11.0 ppb (10) N/A 0.0 ppb (0) 22.0 ppb (17) 0.18 ppb (2) 30.0 μg/m3 (27) 9.2 μg/m3 (38) 38.0
 
March 15, 2019, 2 p.m. 19.0 ppb (18) 3.8 ppb (4) 18.0 ppb (17) 15.0 ppb (14) N/A 0.0 ppb (0) 12.0 ppb (9) 0.21 ppb (2) 39.0 μg/m3 (35) 13.3 μg/m3 (53) 53.0
 
March 15, 2019, 1 p.m. 14.2 ppb (13) 1.7 ppb (2) 14.0 ppb (13) 13.0 ppb (12) N/A 0.0 ppb (0) 11.0 ppb (8) 0.2 ppb (2) 34.0 μg/m3 (31) 12.7 μg/m3 (51) 51.0
 
March 15, 2019, noon 8.0 ppb (7) -0.1 ppb (0) 7.0 ppb (6) 8.0 ppb (7) N/A 0.0 ppb (0) 17.0 ppb (13) 0.18 ppb (2) 24.0 μg/m3 (22) 11.0 μg/m3 (46) 46.0
 
March 15, 2019, 11 a.m. 4.1 ppb (4) -0.2 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 19.0 ppb (15) 0.16 ppb (2) 19.0 μg/m3 (17) 10.7 μg/m3 (45) 45.0
 
March 15, 2019, 10 a.m. 3.1 ppb (3) -0.2 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 21.0 ppb (16) 0.14 ppb (2) 19.0 μg/m3 (17) 11.3 μg/m3 (47) 47.0
 
March 15, 2019, 9 a.m. 1.7 ppb (2) -0.2 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 24.0 ppb (18) 0.14 ppb (2) 21.0 μg/m3 (19) 12.6 μg/m3 (51) 51.0
 
March 15, 2019, 8 a.m. 2.2 ppb (2) -0.3 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (19) 0.17 ppb (2) 23.0 μg/m3 (21) 14.0 μg/m3 (54) 54.0
 
March 15, 2019, 7 a.m. 2.0 ppb (2) -0.3 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 27.0 ppb (21) N/A 24.0 μg/m3 (22) 14.8 μg/m3 (56) 56.0
 
March 15, 2019, 6 a.m. 1.8 ppb (2) -0.3 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (22) N/A 25.0 μg/m3 (23) 16.6 μg/m3 (60) 60.0
 
March 15, 2019, 5 a.m. 1.6 ppb (1) -0.3 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (25) 0.06 ppb (1) 27.0 μg/m3 (25) 18.1 μg/m3 (63) 63.0
 
March 15, 2019, 4 a.m. 2.1 ppb (2) -0.3 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (27) 0.06 ppb (1) 27.0 μg/m3 (25) 17.3 μg/m3 (61) 61.0
 
March 15, 2019, 3 a.m. 2.4 ppb (2) -0.3 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (32) 0.1 ppb (1) 33.0 μg/m3 (30) 23.5 μg/m3 (74) 74.0
 
March 15, 2019, 2 a.m. 2.6 ppb (2) -0.3 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (32) 0.1 ppb (1) 33.0 μg/m3 (30) 22.8 μg/m3 (73) 73.0
 
March 15, 2019, 1 a.m. 3.8 ppb (4) -0.3 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 39.0 ppb (30) 0.09 ppb (1) 28.0 μg/m3 (25) 18.1 μg/m3 (63) 63.0
 
March 15, 2019, midnight 2.4 ppb (2) -0.3 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (32) 0.08 ppb (1) 25.0 μg/m3 (23) 13.8 μg/m3 (54) 54.0
 
March 14, 2019, 11 p.m. 2.7 ppb (3) -0.3 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (30) 0.07 ppb (1) 21.0 μg/m3 (19) 12.3 μg/m3 (51) 51.0
 
March 14, 2019, 10 p.m. 2.4 ppb (2) -0.2 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (32) 0.07 ppb (1) 23.0 μg/m3 (21) 12.6 μg/m3 (51) 51.0
 
March 14, 2019, 9 p.m. 2.2 ppb (2) -0.2 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) 0.07 ppb (1) 22.0 μg/m3 (20) 12.3 μg/m3 (51) 51.0
 
March 14, 2019, 8 p.m. 2.4 ppb (2) -0.1 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (32) 0.05 ppb (1) 21.0 μg/m3 (19) 10.5 μg/m3 (44) 44.0
 
March 14, 2019, 7 p.m. 2.1 ppb (2) -0.2 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) 0.01 ppb (0) 19.0 μg/m3 (17) 9.3 μg/m3 (39) 39.0
 
March 14, 2019, 6 p.m. 2.1 ppb (2) -0.1 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) 0.04 ppb (0) 23.0 μg/m3 (21) 8.9 μg/m3 (37) 37.0
 
March 14, 2019, 5 p.m. 2.1 ppb (2) -0.1 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) 0.07 ppb (1) 20.0 μg/m3 (18) 8.2 μg/m3 (34) 34.0
 
March 14, 2019, 4 p.m. 1.9 ppb (2) -0.1 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) 0.07 ppb (1) 17.0 μg/m3 (15) 7.4 μg/m3 (31) 31.0
 
March 14, 2019, 3 p.m. 3.1 ppb (3) 0.1 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (28) 0.1 ppb (1) 18.0 μg/m3 (16) 7.3 μg/m3 (30) 30.0
 
March 14, 2019, 2 p.m. 3.4 ppb (3) 0.1 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (26) 0.15 ppb (2) 19.0 μg/m3 (17) 7.5 μg/m3 (31) 31.0
 
March 14, 2019, 1 p.m. 4.3 ppb (4) -0.1 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (23) 0.17 ppb (2) 18.0 μg/m3 (16) 7.7 μg/m3 (32) 32.0
 
March 14, 2019, noon 4.0 ppb (4) -0.2 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (24) 0.17 ppb (2) 16.0 μg/m3 (15) 7.1 μg/m3 (30) 30.0
 
March 14, 2019, 11 a.m. 2.3 ppb (2) -0.3 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (25) 0.17 ppb (2) 15.0 μg/m3 (14) 6.9 μg/m3 (29) 29.0
 
March 14, 2019, 10 a.m. 5.3 ppb (5) -0.2 ppb (0) 4.0 ppb (4) 6.0 ppb (6) N/A 0.0 ppb (0) 29.0 ppb (22) 0.17 ppb (2) 15.0 μg/m3 (14) 6.9 μg/m3 (29) 29.0
 
March 14, 2019, 9 a.m. 4.8 ppb (4) -0.2 ppb (0) 4.0 ppb (4) 5.0 ppb (5) N/A 0.0 ppb (0) 30.0 ppb (23) 0.18 ppb (2) 15.0 μg/m3 (14) 6.9 μg/m3 (29) 29.0
 
March 14, 2019, 8 a.m. 1.2 ppb (1) -0.3 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (26) 0.18 ppb (2) 15.0 μg/m3 (14) 7.5 μg/m3 (31) 31.0
 
March 14, 2019, 7 a.m. 1.0 ppb (1) -0.3 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 17.0 μg/m3 (15) 8.9 μg/m3 (37) 37.0
 
March 14, 2019, 6 a.m. 1.5 ppb (1) -0.3 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 18.0 μg/m3 (16) 10.5 μg/m3 (44) 44.0
 
March 14, 2019, 5 a.m. 2.5 ppb (2) -0.3 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (29) 0.19 ppb (2) 20.0 μg/m3 (18) 13.2 μg/m3 (53) 53.0
 
March 14, 2019, 4 a.m. 4.2 ppb (4) -0.3 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 38.0 ppb (29) 0.22 ppb (2) N/A N/A 29.0
 
March 14, 2019, 3 a.m. 6.2 ppb (6) -0.3 ppb (0) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 38.0 ppb (29) 0.24 ppb (3) 24.0 μg/m3 (22) 16.3 μg/m3 (59) 59.0
 
March 14, 2019, 2 a.m. 6.1 ppb (6) -0.3 ppb (0) 5.0 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 40.0 ppb (31) 0.23 ppb (3) 20.0 μg/m3 (18) 11.0 μg/m3 (46) 46.0
 
March 14, 2019, 1 a.m. 6.6 ppb (6) -0.3 ppb (0) 6.0 ppb (6) 7.0 ppb (6) N/A 0.0 ppb (0) 41.0 ppb (32) 0.23 ppb (3) 13.0 μg/m3 (12) 7.9 μg/m3 (33) 33.0
 
March 14, 2019, midnight 3.6 ppb (3) -0.3 ppb (0) 3.0 ppb (3) 4.0 ppb (4) N/A 0.0 ppb (0) 47.0 ppb (36) 0.2 ppb (2) 13.0 μg/m3 (12) 6.8 μg/m3 (28) 36.0
 
March 13, 2019, 11 p.m. 2.6 ppb (2) -0.3 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 50.0 ppb (38) 0.2 ppb (2) 24.0 μg/m3 (22) 16.9 μg/m3 (60) 60.0
 
March 13, 2019, 10 p.m. 3.6 ppb (3) -0.2 ppb (0) 3.0 ppb (3) 4.0 ppb (4) N/A 1.0 ppb (1) 59.0 ppb (45) 0.28 ppb (3) 58.0 μg/m3 (52) 50.0 μg/m3 (136) 136.0
 
March 13, 2019, 9 p.m. 2.4 ppb (2) -0.2 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 1.0 ppb (1) 54.0 ppb (42) 0.19 ppb (2) 17.0 μg/m3 (15) 10.5 μg/m3 (44) 44.0
 
March 13, 2019, 8 p.m. 2.5 ppb (2) -0.2 ppb (0) 1.0 ppb (1) 3.0 ppb (3) N/A 0.0 ppb (0) 51.0 ppb (39) 0.17 ppb (2) 13.0 μg/m3 (12) 7.3 μg/m3 (30) 39.0
 
March 13, 2019, 7 p.m. 2.5 ppb (2) -0.2 ppb (0) 1.0 ppb (1) 3.0 ppb (3) N/A 0.0 ppb (0) 51.0 ppb (39) 0.17 ppb (2) 14.0 μg/m3 (13) 7.0 μg/m3 (29) 39.0
 
March 13, 2019, 6 p.m. 2.3 ppb (2) -0.2 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 50.0 ppb (38) 0.17 ppb (2) 11.0 μg/m3 (10) 6.3 μg/m3 (26) 38.0
 
March 13, 2019, 5 p.m. 2.2 ppb (2) -0.1 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 49.0 ppb (38) 0.17 ppb (2) 12.0 μg/m3 (11) 6.0 μg/m3 (25) 38.0
 
March 13, 2019, 4 p.m. 2.3 ppb (2) -0.1 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 46.0 ppb (35) 0.17 ppb (2) 14.0 μg/m3 (13) 7.2 μg/m3 (30) 35.0
 
March 13, 2019, 3 p.m. 2.4 ppb (2) 0.0 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 1.0 ppb (1) 42.0 ppb (32) N/A 19.0 μg/m3 (17) 9.4 μg/m3 (39) 39.0
 
March 13, 2019, 2 p.m. 3.9 ppb (4) 0.0 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 35.0 ppb (27) N/A 12.0 μg/m3 (11) 6.0 μg/m3 (25) 27.0
 
March 13, 2019, 1 p.m. 6.8 ppb (6) 0.1 ppb (0) 7.0 ppb (6) 7.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (23) N/A 14.0 μg/m3 (13) 7.8 μg/m3 (32) 32.0
 
March 13, 2019, noon 15.6 ppb (14) 0.8 ppb (1) 14.0 ppb (13) 15.0 ppb (14) N/A 0.0 ppb (0) 18.0 ppb (14) N/A 15.0 μg/m3 (14) 9.3 μg/m3 (39) 39.0
 
March 13, 2019, 11 a.m. 37.2 ppb (34) 8.3 ppb (8) 28.0 ppb (26) 29.0 ppb (27) N/A 0.0 ppb (0) 4.0 ppb (3) N/A 16.0 μg/m3 (15) 9.9 μg/m3 (41) 41.0
 
March 13, 2019, 10 a.m. 42.6 ppb (39) 17.8 ppb (16) 45.0 ppb (42) 25.0 ppb (23) N/A 0.0 ppb (0) 10.0 ppb (8) N/A 17.0 μg/m3 (15) 9.9 μg/m3 (41) 42.0
 
March 13, 2019, 9 a.m. 6.8 ppb (6) -0.3 ppb (0) 7.0 ppb (6) 7.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (22) N/A 15.0 μg/m3 (14) 9.7 μg/m3 (40) 40.0
 
March 13, 2019, 8 a.m. 2.3 ppb (2) -0.3 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 15.0 μg/m3 (14) 9.4 μg/m3 (39) 39.0
 
March 13, 2019, 7 a.m. 2.3 ppb (2) -0.3 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 12.0 μg/m3 (11) 7.6 μg/m3 (32) 32.0
 
March 13, 2019, 6 a.m. 9.2 ppb (9) -0.3 ppb (0) 8.0 ppb (7) 9.0 ppb (8) N/A 0.0 ppb (0) 28.0 ppb (22) N/A 14.0 μg/m3 (13) 7.2 μg/m3 (30) 30.0
 
March 13, 2019, 5 a.m. 39.3 ppb (36) 10.5 ppb (10) 41.0 ppb (38) 29.0 ppb (27) N/A 0.0 ppb (0) 5.0 ppb (4) N/A 13.0 μg/m3 (12) 7.1 μg/m3 (30) 38.0
 
March 13, 2019, 4 a.m. 52.7 ppb (49) 15.5 ppb (14) 52.0 ppb (48) 37.0 ppb (34) N/A 0.0 ppb (0) 0.0 ppb (0) N/A 12.0 μg/m3 (11) 6.8 μg/m3 (28) 49.0
 
March 13, 2019, 3 a.m. 45.9 ppb (42) 8.4 ppb (8) 60.0 ppb (56) 38.0 ppb (35) N/A 0.0 ppb (0) 3.0 ppb (2) N/A 13.0 μg/m3 (12) 6.3 μg/m3 (26) 56.0
 
March 13, 2019, 2 a.m. 27.5 ppb (25) -0.2 ppb (0) 29.0 ppb (27) 28.0 ppb (26) N/A 0.0 ppb (0) 14.0 ppb (11) N/A 12.0 μg/m3 (11) 5.8 μg/m3 (24) 27.0
 
March 13, 2019, 1 a.m. 22.2 ppb (21) -0.2 ppb (0) 23.0 ppb (21) 23.0 ppb (21) N/A 0.0 ppb (0) 22.0 ppb (17) N/A 11.0 μg/m3 (10) 5.4 μg/m3 (23) 23.0
 
March 13, 2019, midnight 31.7 ppb (29) -0.2 ppb (0) 29.0 ppb (27) 32.0 ppb (30) N/A 0.0 ppb (0) 21.0 ppb (16) N/A 12.0 μg/m3 (11) 5.7 μg/m3 (24) 30.0
 
March 12, 2019, 11 p.m. 14.9 ppb (14) -0.2 ppb (0) 15.0 ppb (14) 15.0 ppb (14) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 12.0 μg/m3 (11) 5.2 μg/m3 (22) 34.0
 
March 12, 2019, 10 p.m. 10.7 ppb (10) 0.2 ppb (0) 9.0 ppb (8) 11.0 ppb (10) N/A 0.0 ppb (0) 50.0 ppb (38) N/A 11.0 μg/m3 (10) 5.3 μg/m3 (22) 38.0
 
March 12, 2019, 9 p.m. 11.1 ppb (10) 0.6 ppb (1) 9.0 ppb (8) 11.0 ppb (10) N/A 0.0 ppb (0) 52.0 ppb (40) N/A 12.0 μg/m3 (11) 5.0 μg/m3 (21) 40.0
 
March 12, 2019, 8 p.m. 9.9 ppb (9) 0.7 ppb (1) 8.0 ppb (7) 9.0 ppb (8) N/A 0.0 ppb (0) 54.0 ppb (42) N/A 13.0 μg/m3 (12) 5.1 μg/m3 (21) 42.0
 
March 12, 2019, 7 p.m. 9.0 ppb (8) 0.7 ppb (1) 7.0 ppb (6) 8.0 ppb (7) N/A 0.0 ppb (0) 53.0 ppb (41) N/A 11.0 μg/m3 (10) 4.7 μg/m3 (20) 41.0
 
March 12, 2019, 6 p.m. 9.0 ppb (8) 1.2 ppb (1) 7.0 ppb (6) 8.0 ppb (7) N/A 0.0 ppb (0) 48.0 ppb (37) N/A 10.0 μg/m3 (9) 4.7 μg/m3 (20) 37.0
 
March 12, 2019, 5 p.m. 9.0 ppb (8) 1.4 ppb (1) 8.0 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 9.0 μg/m3 (8) 4.4 μg/m3 (18) 34.0
 
March 12, 2019, 4 p.m. 9.0 ppb (8) 1.7 ppb (2) 8.0 ppb (7) 7.0 ppb (6) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 9.0 μg/m3 (8) 4.4 μg/m3 (18) 32.0
 
March 12, 2019, 3 p.m. 13.1 ppb (12) 2.9 ppb (3) 12.0 ppb (11) 10.0 ppb (9) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 10.0 μg/m3 (9) 4.5 μg/m3 (19) 26.0