AQSQID: 130890002

Site Name: South Dekalb

Location: DeKalb Co, GA

Reporting: True, Located: True

Current AQI: 26.0

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
May 22, 2019, midnight 3.1 ppb (3) -0.1 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (26) 0.19 ppb (2) N/A N/A 26.0
 
May 21, 2019, 11 p.m. 2.7 ppb (3) -0.1 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) 0.18 ppb (2) 22.0 μg/m3 (20) 10.7 μg/m3 (45) 45.0
 
May 21, 2019, 10 p.m. 1.9 ppb (2) -0.1 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) 0.17 ppb (2) 20.0 μg/m3 (18) 9.9 μg/m3 (41) 41.0
 
May 21, 2019, 9 p.m. 2.1 ppb (2) 0.0 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) 0.16 ppb (2) 23.0 μg/m3 (21) 10.2 μg/m3 (42) 42.0
 
May 21, 2019, 8 p.m. 2.4 ppb (2) 0.0 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 51.0 ppb (39) 0.17 ppb (2) 25.0 μg/m3 (23) 10.6 μg/m3 (44) 44.0
 
May 21, 2019, 7 p.m. 2.6 ppb (2) 0.0 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 53.0 ppb (41) 0.17 ppb (2) 26.0 μg/m3 (24) 10.9 μg/m3 (45) 45.0
 
May 21, 2019, 6 p.m. 2.7 ppb (3) 0.0 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 55.0 ppb (42) 0.17 ppb (2) 24.0 μg/m3 (22) 11.1 μg/m3 (46) 46.0
 
May 21, 2019, 5 p.m. 3.6 ppb (3) 0.0 ppb (0) 3.0 ppb (3) 4.0 ppb (4) N/A 0.0 ppb (0) 65.0 ppb (50) 0.19 ppb (2) 23.0 μg/m3 (21) 11.4 μg/m3 (48) 50.0
 
May 21, 2019, 4 p.m. 3.4 ppb (3) 0.0 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 62.0 ppb (48) 0.19 ppb (2) 22.0 μg/m3 (20) 9.9 μg/m3 (41) 48.0
 
May 21, 2019, 3 p.m. 2.7 ppb (3) 0.1 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 53.0 ppb (41) 0.18 ppb (2) 20.0 μg/m3 (18) 8.8 μg/m3 (37) 41.0
 
May 21, 2019, 2 p.m. 9.6 ppb (9) 1.6 ppb (1) 9.0 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 42.0 ppb (32) 0.29 ppb (3) 17.0 μg/m3 (15) 9.0 μg/m3 (38) 38.0
 
May 21, 2019, 1 p.m. 57.7 ppb (54) 35.8 ppb (33) 58.0 ppb (54) 22.0 ppb (20) N/A 0.0 ppb (0) 10.0 ppb (8) 0.71 ppb (8) 23.0 μg/m3 (21) 10.7 μg/m3 (45) 54.0
 
May 21, 2019, noon 87.0 ppb (85) 75.2 ppb (73) 90.0 ppb (88) 12.0 ppb (11) N/A 0.0 ppb (0) 0.0 ppb (0) 0.77 ppb (9) 27.0 μg/m3 (25) 10.7 μg/m3 (45) 88.0
 
May 21, 2019, 11 a.m. 81.2 ppb (79) 73.7 ppb (71) 81.0 ppb (79) 7.0 ppb (6) N/A 0.0 ppb (0) 0.0 ppb (0) 0.65 ppb (7) 27.0 μg/m3 (25) 11.1 μg/m3 (46) 79.0
 
May 21, 2019, 10 a.m. 72.4 ppb (70) 63.6 ppb (60) 75.0 ppb (72) 9.0 ppb (8) N/A 0.0 ppb (0) 0.0 ppb (0) 0.58 ppb (6) 25.0 μg/m3 (23) 11.6 μg/m3 (48) 72.0
 
May 21, 2019, 9 a.m. 55.5 ppb (52) 46.2 ppb (43) 60.0 ppb (56) 9.0 ppb (8) N/A 0.0 ppb (0) 0.0 ppb (0) 0.5 ppb (6) 26.0 μg/m3 (24) 11.7 μg/m3 (49) 56.0
 
May 21, 2019, 8 a.m. 47.6 ppb (44) 36.0 ppb (33) 50.0 ppb (46) 12.0 ppb (11) N/A 0.0 ppb (0) 0.0 ppb (0) 0.46 ppb (5) 29.0 μg/m3 (26) 11.8 μg/m3 (49) 49.0
 
May 21, 2019, 7 a.m. 36.7 ppb (34) 24.2 ppb (22) 38.0 ppb (35) 13.0 ppb (12) N/A 0.0 ppb (0) 0.0 ppb (0) N/A 28.0 μg/m3 (25) 11.6 μg/m3 (48) 48.0
 
May 21, 2019, 6 a.m. 31.6 ppb (29) 16.4 ppb (15) 32.0 ppb (30) 15.0 ppb (14) N/A 0.0 ppb (0) 0.0 ppb (0) N/A 29.0 μg/m3 (26) 11.6 μg/m3 (48) 48.0
 
May 21, 2019, 5 a.m. 38.4 ppb (36) 19.8 ppb (18) 40.0 ppb (37) 19.0 ppb (18) N/A 0.0 ppb (0) 0.0 ppb (0) 0.46 ppb (5) 32.0 μg/m3 (29) 11.2 μg/m3 (47) 47.0
 
May 21, 2019, 4 a.m. 36.5 ppb (34) 13.0 ppb (12) 38.0 ppb (35) 24.0 ppb (22) N/A 0.0 ppb (0) 0.0 ppb (0) 0.46 ppb (5) N/A N/A 35.0
 
May 21, 2019, 3 a.m. 39.5 ppb (37) 11.5 ppb (11) 42.0 ppb (39) 28.0 ppb (26) N/A 0.0 ppb (0) 0.0 ppb (0) 0.44 ppb (5) 27.0 μg/m3 (25) 10.3 μg/m3 (43) 43.0
 
May 21, 2019, 2 a.m. 47.8 ppb (44) 13.6 ppb (13) 50.0 ppb (46) 34.0 ppb (31) N/A N/A 0.0 ppb (0) 0.43 ppb (5) 22.0 μg/m3 (20) 9.6 μg/m3 (40) 46.0
 
May 21, 2019, 1 a.m. 20.7 ppb (19) 1.1 ppb (1) 28.0 ppb (26) 20.0 ppb (19) N/A N/A 19.0 ppb (15) 0.28 ppb (3) 21.0 μg/m3 (19) 8.8 μg/m3 (37) 37.0
 
May 21, 2019, midnight 6.0 ppb (6) -0.1 ppb (0) 6.0 ppb (6) 6.0 ppb (6) N/A N/A 40.0 ppb (31) 0.2 ppb (2) 17.0 μg/m3 (15) 8.2 μg/m3 (34) 34.0
 
May 20, 2019, 11 p.m. 4.2 ppb (4) 0.0 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (35) 0.17 ppb (2) 18.0 μg/m3 (16) 7.9 μg/m3 (33) 35.0
 
May 20, 2019, 10 p.m. 3.5 ppb (3) 0.1 ppb (0) 3.0 ppb (3) 4.0 ppb (4) N/A 0.0 ppb (0) 48.0 ppb (37) 0.17 ppb (2) 20.0 μg/m3 (18) 8.0 μg/m3 (33) 37.0
 
May 20, 2019, 9 p.m. 3.0 ppb (3) 0.1 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) 0.16 ppb (2) 19.0 μg/m3 (17) 8.2 μg/m3 (34) 38.0
 
May 20, 2019, 8 p.m. 3.4 ppb (3) 0.2 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 48.0 ppb (37) 0.17 ppb (2) 27.0 μg/m3 (25) 11.0 μg/m3 (46) 46.0
 
May 20, 2019, 7 p.m. 3.6 ppb (3) 0.2 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 50.0 ppb (38) 0.18 ppb (2) 28.0 μg/m3 (25) 11.4 μg/m3 (48) 48.0
 
May 20, 2019, 6 p.m. 3.3 ppb (3) 0.1 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 51.0 ppb (39) 0.18 ppb (2) 29.0 μg/m3 (26) 11.7 μg/m3 (49) 49.0
 
May 20, 2019, 5 p.m. 2.9 ppb (3) 0.1 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 50.0 ppb (38) 0.18 ppb (2) 29.0 μg/m3 (26) 11.4 μg/m3 (48) 48.0
 
May 20, 2019, 4 p.m. 3.3 ppb (3) 0.2 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) 0.18 ppb (2) 28.0 μg/m3 (25) 11.3 μg/m3 (47) 47.0
 
May 20, 2019, 3 p.m. 4.3 ppb (4) 0.4 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (35) 0.19 ppb (2) 24.0 μg/m3 (22) 11.4 μg/m3 (48) 48.0
 
May 20, 2019, 2 p.m. 6.5 ppb (6) 0.8 ppb (1) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 41.0 ppb (32) 0.21 ppb (2) 21.0 μg/m3 (19) 10.0 μg/m3 (42) 42.0
 
May 20, 2019, 1 p.m. 11.9 ppb (11) 3.3 ppb (3) 12.0 ppb (11) 9.0 ppb (8) N/A 0.0 ppb (0) 30.0 ppb (23) 0.27 ppb (3) 26.0 μg/m3 (24) 12.7 μg/m3 (51) 51.0
 
May 20, 2019, noon 46.6 ppb (43) 34.8 ppb (32) 50.0 ppb (46) 12.0 ppb (11) N/A 0.0 ppb (0) 1.0 ppb (1) 0.57 ppb (6) 30.0 μg/m3 (27) 17.6 μg/m3 (62) 62.0
 
May 20, 2019, 11 a.m. 49.3 ppb (46) 39.2 ppb (36) 51.0 ppb (47) 10.0 ppb (9) N/A 0.0 ppb (0) 0.0 ppb (0) 0.62 ppb (7) 36.0 μg/m3 (33) 18.0 μg/m3 (63) 63.0
 
May 20, 2019, 10 a.m. 70.4 ppb (67) 59.7 ppb (56) 75.0 ppb (72) 11.0 ppb (10) N/A 0.0 ppb (0) 0.0 ppb (0) 0.72 ppb (8) 37.0 μg/m3 (34) 18.1 μg/m3 (63) 72.0
 
May 20, 2019, 9 a.m. 72.9 ppb (70) 61.3 ppb (58) 80.0 ppb (78) 12.0 ppb (11) N/A 0.0 ppb (0) 0.0 ppb (0) 0.76 ppb (8) 35.0 μg/m3 (32) 18.3 μg/m3 (63) 78.0
 
May 20, 2019, 8 a.m. 45.3 ppb (42) 34.7 ppb (32) 50.0 ppb (46) 11.0 ppb (10) N/A 0.0 ppb (0) N/A 0.67 ppb (7) 35.0 μg/m3 (32) 17.7 μg/m3 (62) 62.0
 
May 20, 2019, 7 a.m. 30.4 ppb (28) 16.6 ppb (15) 32.0 ppb (30) 14.0 ppb (13) N/A 0.0 ppb (0) N/A N/A 34.0 μg/m3 (31) 17.9 μg/m3 (63) 63.0
 
May 20, 2019, 6 a.m. 30.6 ppb (28) 16.5 ppb (15) 33.0 ppb (31) 14.0 ppb (13) N/A 0.0 ppb (0) 0.0 ppb (0) N/A 33.0 μg/m3 (30) 18.1 μg/m3 (63) 63.0
 
May 20, 2019, 5 a.m. 31.9 ppb (30) 15.1 ppb (14) 39.0 ppb (36) 17.0 ppb (16) N/A 0.0 ppb (0) 0.0 ppb (0) 0.55 ppb (6) 35.0 μg/m3 (32) 17.8 μg/m3 (62) 62.0
 
May 20, 2019, 4 a.m. 27.1 ppb (25) 7.5 ppb (7) 36.0 ppb (33) 20.0 ppb (19) N/A 0.0 ppb (0) 0.0 ppb (0) 0.5 ppb (6) 31.0 μg/m3 (28) 17.5 μg/m3 (62) 62.0
 
May 20, 2019, 3 a.m. 27.0 ppb (25) 4.9 ppb (5) 33.0 ppb (31) 22.0 ppb (20) N/A 0.0 ppb (0) 2.0 ppb (2) 0.47 ppb (5) 28.0 μg/m3 (25) 16.9 μg/m3 (60) 60.0
 
May 20, 2019, 2 a.m. 7.3 ppb (7) 0.0 ppb (0) 9.0 ppb (8) 7.0 ppb (6) N/A 0.0 ppb (0) 23.0 ppb (18) 0.25 ppb (3) 25.0 μg/m3 (23) 16.9 μg/m3 (60) 60.0
 
May 20, 2019, 1 a.m. 3.8 ppb (4) -0.1 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) 0.21 ppb (2) 22.0 μg/m3 (20) 15.5 μg/m3 (57) 57.0
 
May 20, 2019, midnight 3.6 ppb (3) -0.1 ppb (0) 3.0 ppb (3) 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (35) 0.19 ppb (2) 20.0 μg/m3 (18) 14.2 μg/m3 (55) 55.0
 
May 19, 2019, 11 p.m. N/A N/A 2.0 ppb (2) N/A N/A 0.0 ppb (0) 48.0 ppb (37) 0.18 ppb (2) 21.0 μg/m3 (19) 13.3 μg/m3 (53) 53.0
 
May 19, 2019, 10 p.m. N/A N/A 1.0 ppb (1) N/A N/A 0.0 ppb (0) 49.0 ppb (38) 0.17 ppb (2) 21.0 μg/m3 (19) 13.5 μg/m3 (53) 53.0
 
May 19, 2019, 9 p.m. N/A N/A 1.0 ppb (1) N/A N/A 0.0 ppb (0) 50.0 ppb (38) 0.17 ppb (2) 19.0 μg/m3 (17) 12.8 μg/m3 (52) 52.0
 
May 19, 2019, 8 p.m. N/A N/A 1.0 ppb (1) N/A N/A 0.0 ppb (0) 48.0 ppb (37) 0.17 ppb (2) 20.0 μg/m3 (18) 12.8 μg/m3 (52) 52.0
 
May 19, 2019, 7 p.m. N/A N/A 1.0 ppb (1) N/A N/A 0.0 ppb (0) 48.0 ppb (37) 0.17 ppb (2) 20.0 μg/m3 (18) 12.9 μg/m3 (52) 52.0
 
May 19, 2019, 6 p.m. 1.7 ppb (2) 0.0 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 49.0 ppb (38) 0.17 ppb (2) 22.0 μg/m3 (20) 13.2 μg/m3 (53) 53.0
 
May 19, 2019, 5 p.m. 1.9 ppb (2) 0.0 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 50.0 ppb (38) 0.17 ppb (2) 21.0 μg/m3 (19) 13.2 μg/m3 (53) 53.0
 
May 19, 2019, 4 p.m. 1.7 ppb (2) 0.0 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 50.0 ppb (38) 0.17 ppb (2) 21.0 μg/m3 (19) 12.5 μg/m3 (51) 51.0
 
May 19, 2019, 3 p.m. 2.1 ppb (2) 0.0 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 49.0 ppb (38) 0.17 ppb (2) 20.0 μg/m3 (18) 12.6 μg/m3 (51) 51.0
 
May 19, 2019, 2 p.m. 5.7 ppb (5) 0.7 ppb (1) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 45.0 ppb (35) 0.23 ppb (3) 22.0 μg/m3 (20) 14.7 μg/m3 (56) 56.0
 
May 19, 2019, 1 p.m. 22.0 ppb (20) 8.6 ppb (8) 22.0 ppb (20) 14.0 ppb (13) N/A 0.0 ppb (0) 14.0 ppb (11) 0.5 ppb (6) 26.0 μg/m3 (24) 17.5 μg/m3 (62) 62.0
 
May 19, 2019, noon 22.4 ppb (21) 17.3 ppb (16) 24.0 ppb (22) 5.0 ppb (5) N/A 0.0 ppb (0) 1.0 ppb (1) 0.72 ppb (8) 30.0 μg/m3 (27) 17.6 μg/m3 (62) 62.0
 
May 19, 2019, 11 a.m. 25.4 ppb (24) 22.0 ppb (20) 27.0 ppb (25) 3.0 ppb (3) N/A 0.0 ppb (0) 0.0 ppb (0) 0.74 ppb (8) 32.0 μg/m3 (29) 19.0 μg/m3 (65) 65.0
 
May 19, 2019, 10 a.m. 24.2 ppb (22) 19.4 ppb (18) 27.0 ppb (25) 5.0 ppb (5) N/A 0.0 ppb (0) 0.0 ppb (0) 0.71 ppb (8) 35.0 μg/m3 (32) 20.0 μg/m3 (67) 67.0
 
May 19, 2019, 9 a.m. 22.2 ppb (21) 16.6 ppb (15) 25.0 ppb (23) 6.0 ppb (6) N/A 0.0 ppb (0) 0.0 ppb (0) 0.7 ppb (8) 37.0 μg/m3 (34) 20.3 μg/m3 (68) 68.0
 
May 19, 2019, 8 a.m. 28.5 ppb (26) 22.3 ppb (21) 28.0 ppb (26) 6.0 ppb (6) N/A 0.0 ppb (0) 0.0 ppb (0) 0.8 ppb (9) 35.0 μg/m3 (32) 19.9 μg/m3 (67) 67.0
 
May 19, 2019, 7 a.m. 42.3 ppb (39) 34.8 ppb (32) 45.0 ppb (42) 8.0 ppb (7) N/A 0.0 ppb (0) 0.0 ppb (0) N/A 35.0 μg/m3 (32) 19.3 μg/m3 (66) 66.0
 
May 19, 2019, 6 a.m. 40.1 ppb (37) 30.9 ppb (29) 44.0 ppb (41) 9.0 ppb (8) N/A 0.0 ppb (0) 0.0 ppb (0) N/A 35.0 μg/m3 (32) 19.0 μg/m3 (65) 65.0
 
May 19, 2019, 5 a.m. 36.0 ppb (33) 22.3 ppb (21) 40.0 ppb (37) 14.0 ppb (13) N/A 0.0 ppb (0) 0.0 ppb (0) 0.81 ppb (9) 35.0 μg/m3 (32) 18.8 μg/m3 (64) 64.0
 
May 19, 2019, 4 a.m. 22.2 ppb (21) 6.2 ppb (6) 25.0 ppb (23) 16.0 ppb (15) N/A 0.0 ppb (0) 0.0 ppb (0) 0.58 ppb (6) N/A N/A 23.0
 
May 19, 2019, 3 a.m. 13.0 ppb (12) 0.2 ppb (0) 15.0 ppb (14) 13.0 ppb (12) N/A 0.0 ppb (0) 7.0 ppb (5) 0.4 ppb (4) 29.0 μg/m3 (26) 17.9 μg/m3 (63) 63.0
 
May 19, 2019, 2 a.m. 6.3 ppb (6) 0.1 ppb (0) 8.0 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 19.0 ppb (15) 0.28 ppb (3) 27.0 μg/m3 (25) 17.3 μg/m3 (61) 61.0
 
May 19, 2019, 1 a.m. 4.0 ppb (4) 0.0 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (23) 0.35 ppb (4) 35.0 μg/m3 (32) 17.1 μg/m3 (61) 61.0
 
May 19, 2019, midnight 7.4 ppb (7) 0.9 ppb (1) 5.0 ppb (5) 7.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (28) 2.39 ppb (27) 92.0 μg/m3 (68) 26.7 μg/m3 (81) 81.0
 
May 18, 2019, 11 p.m. 2.2 ppb (2) -0.1 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) 0.27 ppb (3) 22.0 μg/m3 (20) 13.7 μg/m3 (54) 54.0
 
May 18, 2019, 10 p.m. 2.3 ppb (2) -0.1 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) 0.19 ppb (2) 19.0 μg/m3 (17) 13.4 μg/m3 (53) 53.0
 
May 18, 2019, 9 p.m. 2.4 ppb (2) 0.0 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 48.0 ppb (37) 0.19 ppb (2) 20.0 μg/m3 (18) 14.2 μg/m3 (55) 55.0
 
May 18, 2019, 8 p.m. 2.6 ppb (2) 0.0 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 51.0 ppb (39) 0.19 ppb (2) 22.0 μg/m3 (20) 14.4 μg/m3 (55) 55.0
 
May 18, 2019, 7 p.m. 2.7 ppb (3) 0.0 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 55.0 ppb (42) 0.2 ppb (2) 22.0 μg/m3 (20) 15.0 μg/m3 (56) 56.0
 
May 18, 2019, 6 p.m. 4.3 ppb (4) 0.1 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 64.0 ppb (49) 0.21 ppb (2) 25.0 μg/m3 (23) 16.3 μg/m3 (59) 59.0
 
May 18, 2019, 5 p.m. 4.9 ppb (5) 0.1 ppb (0) 4.0 ppb (4) 5.0 ppb (5) N/A 0.0 ppb (0) 67.0 ppb (52) 0.21 ppb (2) 23.0 μg/m3 (21) 16.6 μg/m3 (60) 60.0
 
May 18, 2019, 4 p.m. 4.2 ppb (4) 0.2 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 60.0 ppb (46) 0.21 ppb (2) 25.0 μg/m3 (23) 16.3 μg/m3 (59) 59.0
 
May 18, 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) 51.0 ppb (39) 0.21 ppb (2) 22.0 μg/m3 (20) 15.1 μg/m3 (57) 57.0
 
May 18, 2019, 2 p.m. 4.8 ppb (4) 0.4 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 44.0 ppb (34) 0.24 ppb (3) 23.0 μg/m3 (21) 15.1 μg/m3 (57) 57.0
 
May 18, 2019, 1 p.m. 24.1 ppb (22) 10.2 ppb (9) 24.0 ppb (22) 14.0 ppb (13) N/A 0.0 ppb (0) 20.0 ppb (15) 0.45 ppb (5) 25.0 μg/m3 (23) 14.0 μg/m3 (54) 54.0
 
May 18, 2019, noon 75.4 ppb (73) 65.3 ppb (62) 76.0 ppb (73) 10.0 ppb (9) N/A 0.0 ppb (0) 0.0 ppb (0) 0.83 ppb (9) 28.0 μg/m3 (25) 14.1 μg/m3 (54) 73.0
 
May 18, 2019, 11 a.m. 60.8 ppb (57) 55.2 ppb (51) 66.0 ppb (63) 6.0 ppb (6) N/A 0.0 ppb (0) 0.0 ppb (0) 0.74 ppb (8) 35.0 μg/m3 (32) 15.7 μg/m3 (58) 63.0
 
May 18, 2019, 10 a.m. 39.9 ppb (37) 34.3 ppb (32) 43.0 ppb (40) 6.0 ppb (6) N/A 0.0 ppb (0) 0.0 ppb (0) 0.63 ppb (7) 40.0 μg/m3 (36) 16.6 μg/m3 (60) 60.0
 
May 18, 2019, 9 a.m. 39.0 ppb (36) 31.9 ppb (30) 41.0 ppb (38) 7.0 ppb (6) N/A 0.0 ppb (0) 0.0 ppb (0) 0.62 ppb (7) 40.0 μg/m3 (36) 16.2 μg/m3 (59) 59.0
 
May 18, 2019, 8 a.m. 42.7 ppb (40) 36.4 ppb (34) 45.0 ppb (42) 6.0 ppb (6) N/A 0.0 ppb (0) 0.0 ppb (0) 0.65 ppb (7) 40.0 μg/m3 (36) 15.3 μg/m3 (57) 57.0
 
May 18, 2019, 7 a.m. 39.7 ppb (37) 31.5 ppb (29) 48.0 ppb (44) 8.0 ppb (7) N/A 0.0 ppb (0) 0.0 ppb (0) N/A 43.0 μg/m3 (39) 15.6 μg/m3 (58) 58.0
 
May 18, 2019, 6 a.m. 40.8 ppb (38) 30.7 ppb (28) 43.0 ppb (40) 10.0 ppb (9) N/A 0.0 ppb (0) 0.0 ppb (0) N/A 41.0 μg/m3 (37) 15.7 μg/m3 (58) 58.0
 
May 18, 2019, 5 a.m. 40.1 ppb (37) 27.1 ppb (25) 43.0 ppb (40) 13.0 ppb (12) N/A 0.0 ppb (0) 0.0 ppb (0) 0.58 ppb (6) 39.0 μg/m3 (35) 14.7 μg/m3 (56) 56.0
 
May 18, 2019, 4 a.m. 34.8 ppb (32) 19.0 ppb (18) 38.0 ppb (35) 16.0 ppb (15) N/A 0.0 ppb (0) 0.0 ppb (0) 0.55 ppb (6) N/A N/A 35.0
 
May 18, 2019, 3 a.m. 16.2 ppb (15) 2.8 ppb (3) 19.0 ppb (18) 13.0 ppb (12) N/A 0.0 ppb (0) 0.0 ppb (0) 0.41 ppb (5) 33.0 μg/m3 (30) 13.1 μg/m3 (52) 52.0
 
May 18, 2019, 2 a.m. 15.3 ppb (14) 0.2 ppb (0) 17.0 ppb (16) 15.0 ppb (14) N/A 0.0 ppb (0) 4.0 ppb (3) 0.38 ppb (4) 30.0 μg/m3 (27) 12.8 μg/m3 (52) 52.0
 
May 18, 2019, 1 a.m. 9.7 ppb (9) 0.1 ppb (0) 9.0 ppb (8) 10.0 ppb (9) N/A 0.0 ppb (0) 9.0 ppb (7) 0.32 ppb (4) 26.0 μg/m3 (24) 12.2 μg/m3 (50) 50.0
 
May 18, 2019, midnight 7.6 ppb (7) 0.0 ppb (0) 8.0 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 19.0 ppb (15) 0.26 ppb (3) 29.0 μg/m3 (26) 12.1 μg/m3 (50) 50.0
 
May 17, 2019, 11 p.m. 11.5 ppb (11) 0.6 ppb (1) 12.0 ppb (11) 11.0 ppb (10) N/A 0.0 ppb (0) 26.0 ppb (20) 0.28 ppb (3) 23.0 μg/m3 (21) 11.4 μg/m3 (48) 48.0
 
May 17, 2019, 10 p.m. 4.7 ppb (4) 0.3 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 29.0 ppb (22) 0.22 ppb (2) 20.0 μg/m3 (18) 9.7 μg/m3 (40) 40.0
 
May 17, 2019, 9 p.m. 2.9 ppb (3) 0.0 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) 0.18 ppb (2) 35.0 μg/m3 (32) 13.0 μg/m3 (52) 52.0
 
May 17, 2019, 8 p.m. 5.8 ppb (5) 0.0 ppb (0) 5.0 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 58.0 ppb (45) 0.21 ppb (2) 30.0 μg/m3 (27) 14.7 μg/m3 (56) 56.0
 
May 17, 2019, 7 p.m. 4.5 ppb (4) 0.0 ppb (0) 4.0 ppb (4) 5.0 ppb (5) N/A 0.0 ppb (0) 69.0 ppb (53) 0.19 ppb (2) 22.0 μg/m3 (20) 13.8 μg/m3 (54) 54.0
 
May 17, 2019, 6 p.m. 4.0 ppb (4) 0.0 ppb (0) 3.0 ppb (3) 4.0 ppb (4) N/A 0.0 ppb (0) 69.0 ppb (53) 0.19 ppb (2) 22.0 μg/m3 (20) 14.1 μg/m3 (54) 54.0
 
May 17, 2019, 5 p.m. 5.0 ppb (5) 0.1 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 72.0 ppb (56) 0.21 ppb (2) 26.0 μg/m3 (24) 14.9 μg/m3 (56) 56.0
 
May 17, 2019, 4 p.m. 5.3 ppb (5) 0.1 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 71.0 ppb (55) 0.23 ppb (3) 28.0 μg/m3 (25) 15.9 μg/m3 (58) 58.0
 
May 17, 2019, 3 p.m. 8.1 ppb (8) 0.7 ppb (1) 8.0 ppb (7) 7.0 ppb (6) N/A 0.0 ppb (0) 59.0 ppb (45) 0.25 ppb (3) 29.0 μg/m3 (26) 15.8 μg/m3 (58) 58.0
 
May 17, 2019, 2 p.m. 10.0 ppb (9) 1.3 ppb (1) 10.0 ppb (9) 9.0 ppb (8) N/A 1.0 ppb (1) 44.0 ppb (34) 0.26 ppb (3) 27.0 μg/m3 (25) 15.5 μg/m3 (57) 57.0
 
May 17, 2019, 1 p.m. 12.1 ppb (11) 2.4 ppb (2) 12.0 ppb (11) 10.0 ppb (9) N/A 0.0 ppb (0) 28.0 ppb (22) 0.27 ppb (3) 26.0 μg/m3 (24) 13.6 μg/m3 (53) 53.0
 
May 17, 2019, noon 29.8 ppb (28) 14.5 ppb (13) 30.0 ppb (28) 15.0 ppb (14) N/A 0.0 ppb (0) 7.0 ppb (5) 0.38 ppb (4) 24.0 μg/m3 (22) 13.4 μg/m3 (53) 53.0
 
May 17, 2019, 11 a.m. 53.2 ppb (49) 41.2 ppb (38) 56.0 ppb (52) 12.0 ppb (11) N/A 0.0 ppb (0) 0.0 ppb (0) 0.43 ppb (5) 27.0 μg/m3 (25) 16.8 μg/m3 (60) 60.0
 
May 17, 2019, 10 a.m. 39.3 ppb (36) 28.7 ppb (27) 42.0 ppb (39) 11.0 ppb (10) N/A 0.0 ppb (0) 0.0 ppb (0) 0.38 ppb (4) 25.0 μg/m3 (23) 16.1 μg/m3 (59) 59.0
 
May 17, 2019, 9 a.m. 33.0 ppb (31) 24.0 ppb (22) 35.0 ppb (32) 9.0 ppb (8) N/A 0.0 ppb (0) 0.0 ppb (0) 0.37 ppb (4) 24.0 μg/m3 (22) 15.3 μg/m3 (57) 57.0
 
May 17, 2019, 8 a.m. 22.2 ppb (21) 11.3 ppb (10) 27.0 ppb (25) 11.0 ppb (10) N/A 0.0 ppb (0) 0.0 ppb (0) 0.34 ppb (4) 23.0 μg/m3 (21) 15.4 μg/m3 (57) 57.0
 
May 17, 2019, 7 a.m. 17.4 ppb (16) 3.8 ppb (4) 18.0 ppb (17) 14.0 ppb (13) N/A 0.0 ppb (0) 0.0 ppb (0) N/A 23.0 μg/m3 (21) 15.2 μg/m3 (57) 57.0
 
May 17, 2019, 6 a.m. 18.7 ppb (17) 3.0 ppb (3) 21.0 ppb (19) 16.0 ppb (15) N/A 0.0 ppb (0) 0.0 ppb (0) N/A 23.0 μg/m3 (21) 14.7 μg/m3 (56) 56.0
 
May 17, 2019, 5 a.m. 20.1 ppb (19) 1.7 ppb (2) 24.0 ppb (22) 18.0 ppb (17) N/A 0.0 ppb (0) 1.0 ppb (1) 0.34 ppb (4) 22.0 μg/m3 (20) 14.3 μg/m3 (55) 55.0
 
May 17, 2019, 4 a.m. 13.2 ppb (12) 0.0 ppb (0) 15.0 ppb (14) 13.0 ppb (12) N/A 0.0 ppb (0) 13.0 ppb (10) 0.31 ppb (3) N/A N/A 14.0
 
May 17, 2019, 3 a.m. 13.4 ppb (12) 0.0 ppb (0) 14.0 ppb (13) 13.0 ppb (12) N/A 0.0 ppb (0) 16.0 ppb (12) 0.31 ppb (3) 22.0 μg/m3 (20) 13.7 μg/m3 (54) 54.0
 
May 17, 2019, 2 a.m. 13.2 ppb (12) -0.1 ppb (0) 14.0 ppb (13) 13.0 ppb (12) N/A 0.0 ppb (0) 22.0 ppb (17) 0.29 ppb (3) 23.0 μg/m3 (21) 13.0 μg/m3 (52) 52.0
 
May 17, 2019, 1 a.m. 7.4 ppb (7) -0.1 ppb (0) 7.0 ppb (6) 8.0 ppb (7) N/A 0.0 ppb (0) 37.0 ppb (28) 0.26 ppb (3) 23.0 μg/m3 (21) 12.6 μg/m3 (51) 51.0
 
May 17, 2019, midnight 10.0 ppb (9) -0.1 ppb (0) 10.0 ppb (9) 10.0 ppb (9) N/A 0.0 ppb (0) 41.0 ppb (32) 0.26 ppb (3) 18.0 μg/m3 (16) 10.3 μg/m3 (43) 43.0
 
May 16, 2019, 11 p.m. 5.9 ppb (5) 0.0 ppb (0) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 50.0 ppb (38) 0.2 ppb (2) 17.0 μg/m3 (15) 9.6 μg/m3 (40) 40.0
 
May 16, 2019, 10 p.m. 3.9 ppb (4) 0.0 ppb (0) 3.0 ppb (3) 4.0 ppb (4) N/A 0.0 ppb (0) 53.0 ppb (41) 0.19 ppb (2) 17.0 μg/m3 (15) 9.4 μg/m3 (39) 41.0
 
May 16, 2019, 9 p.m. 4.5 ppb (4) 0.1 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 55.0 ppb (42) 0.2 ppb (2) 18.0 μg/m3 (16) 10.3 μg/m3 (43) 43.0
 
May 16, 2019, 8 p.m. 4.5 ppb (4) 0.1 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 58.0 ppb (45) 0.21 ppb (2) 21.0 μg/m3 (19) 11.5 μg/m3 (48) 48.0
 
May 16, 2019, 7 p.m. 3.9 ppb (4) 0.0 ppb (0) 3.0 ppb (3) 4.0 ppb (4) N/A 0.0 ppb (0) 61.0 ppb (47) 0.21 ppb (2) 21.0 μg/m3 (19) 12.3 μg/m3 (51) 51.0
 
May 16, 2019, 6 p.m. 4.2 ppb (4) 0.1 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 61.0 ppb (47) 0.21 ppb (2) 22.0 μg/m3 (20) 12.4 μg/m3 (51) 51.0
 
May 16, 2019, 5 p.m. 4.2 ppb (4) 0.1 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 62.0 ppb (48) 0.22 ppb (2) 22.0 μg/m3 (20) 13.0 μg/m3 (52) 52.0
 
May 16, 2019, 4 p.m. 4.5 ppb (4) 0.1 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 60.0 ppb (46) 0.22 ppb (2) 24.0 μg/m3 (22) 12.9 μg/m3 (52) 52.0
 
May 16, 2019, 3 p.m. 9.4 ppb (9) 1.4 ppb (1) 9.0 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 47.0 ppb (36) 0.24 ppb (3) 21.0 μg/m3 (19) 11.9 μg/m3 (50) 50.0
 
May 16, 2019, 2 p.m. 9.4 ppb (9) 1.6 ppb (1) 9.0 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 38.0 ppb (29) 0.25 ppb (3) 22.0 μg/m3 (20) 10.8 μg/m3 (45) 45.0
 
May 16, 2019, 1 p.m. 25.7 ppb (24) 10.2 ppb (9) 26.0 ppb (24) 16.0 ppb (15) N/A 0.0 ppb (0) 19.0 ppb (15) 0.43 ppb (5) 30.0 μg/m3 (27) 13.6 μg/m3 (53) 53.0
 
May 16, 2019, noon 52.5 ppb (49) 35.0 ppb (32) 54.0 ppb (50) 17.0 ppb (16) N/A 0.0 ppb (0) 1.0 ppb (1) 0.7 ppb (8) 29.0 μg/m3 (26) 15.1 μg/m3 (57) 57.0
 
May 16, 2019, 8 a.m. 70.6 ppb (68) 52.5 ppb (49) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 0.0 ppb (0) 0.76 ppb (8) N/A N/A 68.0
 
May 16, 2019, 7 a.m. 48.3 ppb (45) 26.6 ppb (25) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 0.0 ppb (0) N/A 22.0 μg/m3 (20) 13.6 μg/m3 (53) 53.0
 
May 16, 2019, 6 a.m. 43.4 ppb (40) 22.5 ppb (21) 48.0 ppb (44) 21.0 ppb (19) N/A 0.0 ppb (0) 0.0 ppb (0) N/A 21.0 μg/m3 (19) 13.0 μg/m3 (52) 52.0
 
May 16, 2019, 5 a.m. 43.1 ppb (40) 17.2 ppb (16) 46.0 ppb (43) 26.0 ppb (24) N/A 0.0 ppb (0) 0.0 ppb (0) 0.62 ppb (7) 22.0 μg/m3 (20) 13.4 μg/m3 (53) 53.0
 
May 15, 2019, 6 a.m. 35.2 ppb (33) 16.5 ppb (15) 36.0 ppb (33) 19.0 ppb (18) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A N/A 33.0
 
May 15, 2019, 5 a.m. 48.1 ppb (45) 22.6 ppb (21) 51.0 ppb (47) 26.0 ppb (24) N/A 0.0 ppb (0) 0.0 ppb (0) 0.41 ppb (5) 16.0 μg/m3 (15) 8.7 μg/m3 (36) 47.0
 
May 14, 2019, 7 a.m. 14.2 ppb (13) 0.1 ppb (0) 15.0 ppb (14) 14.0 ppb (13) N/A 0.0 ppb (0) 10.0 ppb (8) N/A N/A N/A 14.0
 
May 14, 2019, 6 a.m. 9.3 ppb (9) -0.1 ppb (0) 9.0 ppb (8) 9.0 ppb (8) N/A 0.0 ppb (0) 17.0 ppb (13) N/A 12.0 μg/m3 (11) 5.6 μg/m3 (23) 23.0
 
May 14, 2019, 5 a.m. 7.7 ppb (7) -0.1 ppb (0) 7.0 ppb (6) 8.0 ppb (7) N/A 0.0 ppb (0) 20.0 ppb (15) 0.15 ppb (2) 11.0 μg/m3 (10) 5.6 μg/m3 (23) 23.0
 
May 13, 2019, 5 p.m. 3.1 ppb (3) 0.3 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) 0.13 ppb (1) N/A N/A 35.0
 
May 13, 2019, 4 p.m. 4.7 ppb (4) 0.7 ppb (1) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 41.0 ppb (32) 0.15 ppb (2) 13.0 μg/m3 (12) 4.6 μg/m3 (19) 32.0
 
May 13, 2019, 3 p.m. 5.2 ppb (5) 1.0 ppb (1) 5.0 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) 0.15 ppb (2) 14.0 μg/m3 (13) 4.8 μg/m3 (20) 27.0
 
May 13, 2019, 2 p.m. 6.1 ppb (6) 1.5 ppb (1) 6.0 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 27.0 ppb (21) 0.16 ppb (2) 13.0 μg/m3 (12) 5.3 μg/m3 (22) 22.0
 
May 13, 2019, 1 p.m. 7.2 ppb (7) 2.0 ppb (2) 7.0 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 20.0 ppb (15) 0.18 ppb (2) 13.0 μg/m3 (12) 5.2 μg/m3 (22) 22.0
 
May 13, 2019, noon 7.2 ppb (7) 1.4 ppb (1) 7.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 15.0 ppb (12) 0.19 ppb (2) 17.0 μg/m3 (15) 5.6 μg/m3 (23) 23.0
 
May 13, 2019, 11 a.m. 5.2 ppb (5) 0.5 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 11.0 ppb (8) 0.18 ppb (2) 21.0 μg/m3 (19) 5.8 μg/m3 (24) 24.0
 
May 13, 2019, 10 a.m. 5.8 ppb (5) 0.1 ppb (0) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 9.0 ppb (7) 0.18 ppb (2) 22.0 μg/m3 (20) 6.4 μg/m3 (27) 27.0
 
May 13, 2019, 9 a.m. 6.6 ppb (6) 0.0 ppb (0) 7.0 ppb (6) 7.0 ppb (6) N/A 0.0 ppb (0) N/A 0.18 ppb (2) 25.0 μg/m3 (23) 6.7 μg/m3 (28) 28.0
 
May 13, 2019, 8 a.m. 5.1 ppb (5) 0.0 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) N/A 0.19 ppb (2) 28.0 μg/m3 (25) 7.0 μg/m3 (29) 29.0
 
May 13, 2019, 7 a.m. 4.2 ppb (4) 0.0 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) N/A N/A 28.0 μg/m3 (25) 6.8 μg/m3 (28) 28.0
 
May 13, 2019, 6 a.m. 9.2 ppb (9) 1.5 ppb (1) 9.0 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 3.0 ppb (2) N/A 31.0 μg/m3 (28) 7.7 μg/m3 (32) 32.0
 
May 13, 2019, 5 a.m. 9.9 ppb (9) 0.8 ppb (1) 10.0 ppb (9) 9.0 ppb (8) N/A 0.0 ppb (0) 1.0 ppb (1) 0.29 ppb (3) 34.0 μg/m3 (31) 8.3 μg/m3 (35) 35.0
 
May 13, 2019, 4 a.m. 11.0 ppb (10) 1.4 ppb (1) 12.0 ppb (11) 10.0 ppb (9) N/A 0.0 ppb (0) 0.0 ppb (0) 0.31 ppb (3) 32.0 μg/m3 (29) 8.6 μg/m3 (36) 36.0
 
May 13, 2019, 3 a.m. 11.5 ppb (11) 1.0 ppb (1) 13.0 ppb (12) 10.0 ppb (9) N/A 0.0 ppb (0) 1.0 ppb (1) 0.31 ppb (3) 30.0 μg/m3 (27) 8.3 μg/m3 (35) 35.0
 
May 13, 2019, 2 a.m. 9.3 ppb (9) 0.3 ppb (0) 11.0 ppb (10) 9.0 ppb (8) N/A 0.0 ppb (0) 3.0 ppb (2) 0.29 ppb (3) 31.0 μg/m3 (28) 7.8 μg/m3 (32) 32.0
 
May 13, 2019, 1 a.m. 6.6 ppb (6) 0.0 ppb (0) 7.0 ppb (6) 7.0 ppb (6) N/A 0.0 ppb (0) 9.0 ppb (7) 0.24 ppb (3) 23.0 μg/m3 (21) 6.8 μg/m3 (28) 28.0
 
May 13, 2019, midnight 4.1 ppb (4) 0.0 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 15.0 ppb (12) 0.2 ppb (2) 19.0 μg/m3 (17) 5.9 μg/m3 (25) 25.0
 
May 12, 2019, 11 p.m. N/A N/A 2.0 ppb (2) N/A N/A 0.0 ppb (0) 23.0 ppb (18) 0.17 ppb (2) 14.0 μg/m3 (13) 5.5 μg/m3 (23) 23.0
 
May 12, 2019, 10 p.m. N/A N/A 3.0 ppb (3) N/A N/A 0.0 ppb (0) 24.0 ppb (18) 0.18 ppb (2) 15.0 μg/m3 (14) 6.1 μg/m3 (25) 25.0
 
May 12, 2019, 9 p.m. N/A N/A 3.0 ppb (3) N/A N/A 0.0 ppb (0) 27.0 ppb (21) 0.17 ppb (2) 13.0 μg/m3 (12) 5.7 μg/m3 (24) 24.0
 
May 12, 2019, 8 p.m. N/A N/A 1.0 ppb (1) N/A N/A 0.0 ppb (0) 32.0 ppb (25) 0.15 ppb (2) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 25.0
 
May 12, 2019, 7 p.m. N/A N/A 2.0 ppb (2) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.16 ppb (2) 10.0 μg/m3 (9) 4.2 μg/m3 (18) 28.0
 
May 12, 2019, 6 p.m. 2.4 ppb (2) 0.2 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) 0.17 ppb (2) 8.0 μg/m3 (7) 3.8 μg/m3 (16) 31.0
 
May 12, 2019, 5 p.m. 1.7 ppb (2) 0.1 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (28) 0.16 ppb (2) 9.0 μg/m3 (8) 3.7 μg/m3 (15) 28.0
 
May 12, 2019, 4 p.m. 2.1 ppb (2) 0.2 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 29.0 ppb (22) 0.16 ppb (2) 11.0 μg/m3 (10) 4.3 μg/m3 (18) 22.0