ID: 318

AQSQID: 130890002

Site Name: South Dekalb

Added: April 21, 2020, 6:24 p.m.

Updated: March 8, 2021, 12:32 a.m.

Location: Decatur (Clifton Spgs Rd), GA

Reporting: True, Located: True

Current AQI: 55.0

Decatur (Clifton Spgs Rd) GA, US: 33.6906, -84.2731

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Feb. 28, 2021, 11 p.m. 3.4 ppb (4) -0.3 ppb (0) 1.0 ppb (1) 4.0 ppb (4) N/A 0.0 ppb (0) 23.0 ppb (22) 0.16 ppb (3) 14.4 μg/m3 (14) 6.9 μg/m3 (29) 29.0
 
Feb. 28, 2021, 10 p.m. 2.9 ppb (3) -0.2 ppb (0) 1.0 ppb (1) 3.0 ppb (3) N/A N/A 23.0 ppb (22) 0.16 ppb (3) 12.9 μg/m3 (12) 6.6 μg/m3 (28) 28.0
 
Feb. 28, 2021, 9 p.m. 2.6 ppb (3) -0.2 ppb (0) 1.0 ppb (1) 3.0 ppb (3) N/A N/A 24.0 ppb (23) 0.16 ppb (3) 12.2 μg/m3 (12) 6.4 μg/m3 (27) 27.0
 
Feb. 28, 2021, 8 p.m. 1.9 ppb (2) -0.2 ppb (0) 0.0 ppb (0) 2.0 ppb (2) N/A N/A 23.0 ppb (22) 0.15 ppb (2) 11.8 μg/m3 (11) 5.8 μg/m3 (25) 25.0
 
Feb. 28, 2021, 7 p.m. 1.8 ppb (2) -0.1 ppb (0) 0.0 ppb (0) 2.0 ppb (2) N/A N/A 22.0 ppb (21) 0.15 ppb (2) 12.0 μg/m3 (12) 5.8 μg/m3 (25) 25.0
 
Feb. 28, 2021, 6 p.m. 1.6 ppb (2) -0.1 ppb (0) 0.0 ppb (0) 2.0 ppb (2) N/A N/A 21.0 ppb (20) 0.15 ppb (2) 13.2 μg/m3 (13) 6.1 μg/m3 (26) 26.0
 
Feb. 28, 2021, 5 p.m. 1.3 ppb (2) -0.1 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A N/A 22.0 ppb (21) 0.15 ppb (2) 14.2 μg/m3 (14) 7.8 μg/m3 (33) 33.0
 
Feb. 28, 2021, 4 p.m. 1.5 ppb (2) 0.0 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A N/A 20.0 ppb (19) 0.17 ppb (3) 16.1 μg/m3 (15) 9.9 μg/m3 (42) 42.0
 
Feb. 28, 2021, 3 p.m. 3.8 ppb (4) 0.9 ppb (1) 4.0 ppb (4) 3.0 ppb (3) N/A N/A 13.0 ppb (13) 0.23 ppb (3) 19.1 μg/m3 (18) 13.4 μg/m3 (54) 54.0
 
Feb. 28, 2021, 2 p.m. 3.6 ppb (4) 0.8 ppb (1) 4.0 ppb (4) 3.0 ppb (3) N/A N/A 9.0 ppb (9) 0.27 ppb (4) 26.8 μg/m3 (25) 19.0 μg/m3 (66) 66.0
 
Feb. 28, 2021, 1 p.m. 3.3 ppb (4) 0.3 ppb (1) 4.0 ppb (4) 3.0 ppb (3) N/A N/A 9.0 ppb (9) 0.29 ppb (4) 28.2 μg/m3 (27) 20.0 μg/m3 (68) 68.0
 
Feb. 28, 2021, noon 3.5 ppb (4) -0.2 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A N/A 9.0 ppb (9) 0.29 ppb (4) 25.9 μg/m3 (24) 18.8 μg/m3 (66) 66.0
 
Feb. 28, 2021, 11 a.m. 5.5 ppb (6) -0.2 ppb (0) 6.0 ppb (6) 6.0 ppb (6) N/A N/A 7.0 ppb (7) 0.31 ppb (4) 23.7 μg/m3 (22) 18.0 μg/m3 (64) 64.0
 
Feb. 28, 2021, 10 a.m. 7.6 ppb (8) -0.1 ppb (0) 9.0 ppb (9) 8.0 ppb (8) N/A N/A 4.0 ppb (4) 0.33 ppb (4) 23.5 μg/m3 (22) 17.7 μg/m3 (63) 63.0
 
Feb. 28, 2021, 9 a.m. 6.6 ppb (7) -0.1 ppb (0) 8.0 ppb (8) 7.0 ppb (7) N/A N/A 6.0 ppb (6) N/A 24.9 μg/m3 (24) 19.1 μg/m3 (66) 66.0
 
Feb. 28, 2021, 8 a.m. 3.6 ppb (4) -0.3 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A N/A 10.0 ppb (10) N/A 23.6 μg/m3 (22) 18.4 μg/m3 (65) 65.0
 
Feb. 28, 2021, 7 a.m. 2.6 ppb (3) -0.3 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A N/A 13.0 ppb (13) 0.28 ppb (4) 23.0 μg/m3 (22) 17.3 μg/m3 (62) 62.0
 
Feb. 28, 2021, 6 a.m. 5.3 ppb (5) -0.3 ppb (0) 6.0 ppb (6) 6.0 ppb (6) N/A N/A 13.0 ppb (13) 0.31 ppb (4) 23.8 μg/m3 (23) 17.9 μg/m3 (64) 64.0
 
Feb. 28, 2021, 5 a.m. 7.4 ppb (7) -0.2 ppb (0) 8.0 ppb (8) 8.0 ppb (8) N/A N/A 10.0 ppb (10) 0.37 ppb (5) 26.1 μg/m3 (25) 19.7 μg/m3 (67) 67.0
 
Feb. 28, 2021, 4 a.m. 16.2 ppb (16) 0.6 ppb (1) 16.0 ppb (16) 16.0 ppb (16) N/A N/A 2.0 ppb (2) 0.54 ppb (6) 28.0 μg/m3 (26) 21.6 μg/m3 (71) 71.0
 
Feb. 28, 2021, 3 a.m. 30.5 ppb (29) 9.1 ppb (9) 31.0 ppb (30) 21.0 ppb (20) N/A 0.0 ppb (0) 0.0 ppb (0) 0.74 ppb (8) 27.9 μg/m3 (26) 21.3 μg/m3 (71) 71.0
 
Feb. 28, 2021, 2 a.m. 26.4 ppb (25) 5.5 ppb (6) 27.0 ppb (26) 21.0 ppb (20) N/A 0.0 ppb (0) 0.0 ppb (0) 0.74 ppb (8) 29.6 μg/m3 (28) 22.5 μg/m3 (73) 73.0
 
Feb. 28, 2021, 1 a.m. 22.6 ppb (22) 2.6 ppb (3) 23.0 ppb (22) 20.0 ppb (19) N/A N/A 1.0 ppb (1) 0.61 ppb (7) 27.2 μg/m3 (26) 20.0 μg/m3 (68) 68.0
 
Feb. 28, 2021, midnight 16.2 ppb (16) 0.1 ppb (1) 17.0 ppb (17) 16.0 ppb (16) N/A N/A 10.0 ppb (10) 0.5 ppb (6) 30.3 μg/m3 (29) 23.0 μg/m3 (74) 74.0
 
Feb. 27, 2021, 11 p.m. 9.5 ppb (9) -0.2 ppb (0) 12.0 ppb (12) 10.0 ppb (10) N/A 0.0 ppb (0) 22.0 ppb (21) 0.37 ppb (5) 25.2 μg/m3 (24) 19.1 μg/m3 (66) 66.0
 
Feb. 27, 2021, 10 p.m. 7.4 ppb (7) 0.2 ppb (1) 8.0 ppb (8) 7.0 ppb (7) N/A 0.0 ppb (0) 27.0 ppb (25) 0.31 ppb (4) 25.2 μg/m3 (24) 18.4 μg/m3 (65) 65.0
 
Feb. 27, 2021, 9 p.m. 4.7 ppb (5) 0.3 ppb (1) 5.0 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (28) 0.27 ppb (4) 25.3 μg/m3 (24) 18.1 μg/m3 (64) 64.0
 
Feb. 27, 2021, 8 p.m. 4.2 ppb (4) 0.5 ppb (1) 5.0 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 27.0 ppb (25) 0.25 ppb (3) 22.0 μg/m3 (21) 16.1 μg/m3 (60) 60.0
 
Feb. 27, 2021, 7 p.m. 5.3 ppb (5) 0.9 ppb (1) 6.0 ppb (6) 5.0 ppb (5) N/A N/A 24.0 ppb (23) 0.25 ppb (3) 23.2 μg/m3 (22) 16.4 μg/m3 (61) 61.0
 
Feb. 27, 2021, 6 p.m. 3.9 ppb (4) 0.6 ppb (1) 5.0 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 21.0 ppb (20) 0.25 ppb (3) 26.7 μg/m3 (25) 19.2 μg/m3 (66) 66.0
 
Feb. 27, 2021, 5 p.m. 4.1 ppb (4) 1.0 ppb (1) 6.0 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) 16.0 ppb (15) 0.26 ppb (4) 30.4 μg/m3 (29) 20.7 μg/m3 (70) 70.0
 
Feb. 27, 2021, 4 p.m. 4.1 ppb (4) 1.0 ppb (1) 6.0 ppb (6) 3.0 ppb (3) N/A N/A 14.0 ppb (13) 0.25 ppb (3) 31.3 μg/m3 (29) 21.3 μg/m3 (71) 71.0
 
Feb. 27, 2021, 3 p.m. 4.1 ppb (4) 0.9 ppb (1) 6.0 ppb (6) 3.0 ppb (3) N/A N/A 14.0 ppb (13) 0.24 ppb (3) 28.7 μg/m3 (27) 19.5 μg/m3 (67) 67.0
 
Feb. 27, 2021, 2 p.m. 5.1 ppb (5) 0.8 ppb (1) 7.0 ppb (7) 4.0 ppb (4) N/A N/A 13.0 ppb (13) 0.24 ppb (3) 30.2 μg/m3 (28) 20.1 μg/m3 (68) 68.0
 
Feb. 27, 2021, 1 p.m. 5.7 ppb (6) 0.4 ppb (1) 8.0 ppb (8) 6.0 ppb (6) N/A N/A 13.0 ppb (13) 0.25 ppb (3) 32.6 μg/m3 (31) 21.8 μg/m3 (72) 72.0
 
Feb. 27, 2021, noon 4.7 ppb (5) -0.2 ppb (0) 7.0 ppb (7) 5.0 ppb (5) N/A N/A 13.0 ppb (13) 0.24 ppb (3) 33.2 μg/m3 (31) 21.4 μg/m3 (71) 71.0
 
Feb. 27, 2021, 11 a.m. 3.8 ppb (4) -0.3 ppb (0) 6.0 ppb (6) 4.0 ppb (4) N/A N/A 15.0 ppb (14) 0.24 ppb (3) 29.6 μg/m3 (28) 18.5 μg/m3 (65) 65.0
 
Feb. 27, 2021, 10 a.m. 3.8 ppb (4) -0.3 ppb (0) 6.0 ppb (6) 4.0 ppb (4) N/A N/A 16.0 ppb (15) 0.24 ppb (3) 27.2 μg/m3 (26) 17.7 μg/m3 (63) 63.0
 
Feb. 27, 2021, 9 a.m. 3.2 ppb (4) -0.3 ppb (0) 6.0 ppb (6) 4.0 ppb (4) N/A N/A 16.0 ppb (15) 0.23 ppb (3) 28.3 μg/m3 (27) 20.5 μg/m3 (69) 69.0
 
Feb. 27, 2021, 8 a.m. 3.2 ppb (4) -0.3 ppb (0) 5.0 ppb (5) 4.0 ppb (4) N/A N/A 16.0 ppb (15) 0.23 ppb (3) 28.3 μg/m3 (27) 19.6 μg/m3 (67) 67.0
 
Feb. 27, 2021, 7 a.m. 3.0 ppb (3) -0.3 ppb (0) 4.0 ppb (4) 3.0 ppb (3) N/A N/A 19.0 ppb (18) 0.22 ppb (3) 23.8 μg/m3 (23) 16.4 μg/m3 (61) 61.0
 
Feb. 27, 2021, 6 a.m. 2.5 ppb (3) -0.3 ppb (0) 4.0 ppb (4) 3.0 ppb (3) N/A N/A 20.0 ppb (19) 0.22 ppb (3) 23.7 μg/m3 (22) 16.3 μg/m3 (60) 60.0
 
Feb. 27, 2021, 5 a.m. 2.7 ppb (3) -0.3 ppb (0) 4.0 ppb (4) 3.0 ppb (3) N/A N/A 22.0 ppb (21) 0.23 ppb (3) 24.1 μg/m3 (23) 16.9 μg/m3 (62) 62.0
 
Feb. 27, 2021, 4 a.m. 3.3 ppb (4) -0.4 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A N/A 22.0 ppb (21) 0.23 ppb (3) 25.0 μg/m3 (24) 17.8 μg/m3 (63) 63.0
 
Feb. 27, 2021, 3 a.m. 3.7 ppb (4) -0.3 ppb (0) 5.0 ppb (5) 4.0 ppb (4) N/A N/A 21.0 ppb (20) 0.24 ppb (3) 22.9 μg/m3 (22) 17.2 μg/m3 (62) 62.0
 
Feb. 27, 2021, 2 a.m. 4.3 ppb (5) -0.3 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A -1.0 ppb (0) 21.0 ppb (20) 0.24 ppb (3) 22.7 μg/m3 (22) 17.0 μg/m3 (62) 62.0
 
Feb. 27, 2021, 1 a.m. 5.3 ppb (5) -0.3 ppb (0) 6.0 ppb (6) 6.0 ppb (6) N/A N/A 21.0 ppb (20) 0.26 ppb (4) 23.5 μg/m3 (22) 18.0 μg/m3 (64) 64.0
 
Feb. 27, 2021, midnight 6.0 ppb (6) -0.3 ppb (0) 7.0 ppb (7) 6.0 ppb (6) N/A N/A 22.0 ppb (21) 0.26 ppb (4) 24.6 μg/m3 (23) 17.1 μg/m3 (62) 62.0
 
Feb. 26, 2021, 11 p.m. 6.0 ppb (6) -0.2 ppb (0) 7.0 ppb (7) 6.0 ppb (6) N/A N/A 22.0 ppb (21) 0.26 ppb (4) 22.2 μg/m3 (21) 15.1 μg/m3 (58) 58.0
 
Feb. 26, 2021, 10 p.m. 8.1 ppb (8) 0.2 ppb (1) 9.0 ppb (9) 8.0 ppb (8) N/A N/A 23.0 ppb (22) 0.27 ppb (4) 18.0 μg/m3 (17) 14.2 μg/m3 (56) 56.0
 
Feb. 26, 2021, 9 p.m. 7.0 ppb (7) 0.5 ppb (1) 8.0 ppb (8) 7.0 ppb (7) N/A 0.0 ppb (0) 25.0 ppb (24) 0.26 ppb (4) 16.8 μg/m3 (16) 13.5 μg/m3 (54) 54.0
 
Feb. 26, 2021, 8 p.m. 5.9 ppb (6) 0.3 ppb (1) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 26.0 ppb (25) 0.25 ppb (3) 16.9 μg/m3 (16) 13.5 μg/m3 (54) 54.0
 
Feb. 26, 2021, 7 p.m. 6.6 ppb (7) 0.4 ppb (1) 7.0 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 27.0 ppb (25) 0.25 ppb (3) 17.1 μg/m3 (16) 13.2 μg/m3 (54) 54.0
 
Feb. 26, 2021, 6 p.m. 7.7 ppb (8) 0.4 ppb (1) 8.0 ppb (8) 7.0 ppb (7) N/A N/A 25.0 ppb (24) 0.27 ppb (4) 17.3 μg/m3 (17) 14.3 μg/m3 (56) 56.0
 
Feb. 26, 2021, 5 p.m. 9.1 ppb (9) 0.6 ppb (1) 10.0 ppb (10) 9.0 ppb (9) N/A N/A 25.0 ppb (24) 0.27 ppb (4) 18.8 μg/m3 (18) 15.4 μg/m3 (58) 58.0
 
Feb. 26, 2021, 4 p.m. 9.5 ppb (9) 0.3 ppb (1) 10.0 ppb (10) 9.0 ppb (9) N/A N/A 23.0 ppb (22) 0.26 ppb (4) 21.9 μg/m3 (21) 17.7 μg/m3 (63) 63.0
 
Feb. 26, 2021, 3 p.m. 5.1 ppb (5) -0.1 ppb (0) 6.0 ppb (6) 5.0 ppb (5) N/A N/A 27.0 ppb (25) 0.23 ppb (3) 18.5 μg/m3 (18) 13.8 μg/m3 (55) 55.0
 
Feb. 26, 2021, 2 p.m. 8.9 ppb (9) -0.1 ppb (0) 9.0 ppb (9) 9.0 ppb (9) N/A N/A 24.0 ppb (23) 0.24 ppb (3) 17.1 μg/m3 (16) 11.7 μg/m3 (49) 49.0
 
Feb. 26, 2021, 1 p.m. 9.6 ppb (10) -0.1 ppb (0) 10.0 ppb (10) 10.0 ppb (10) N/A N/A 20.0 ppb (19) 0.25 ppb (3) 15.5 μg/m3 (15) 9.9 μg/m3 (42) 42.0
 
Feb. 26, 2021, noon 8.0 ppb (8) -0.2 ppb (0) 9.0 ppb (9) 8.0 ppb (8) N/A 0.0 ppb (0) 20.0 ppb (19) 0.23 ppb (3) 13.8 μg/m3 (13) 9.3 μg/m3 (39) 39.0
 
Feb. 26, 2021, 11 a.m. 8.1 ppb (8) -0.2 ppb (0) 9.0 ppb (9) 8.0 ppb (8) N/A 0.0 ppb (0) 23.0 ppb (22) 0.23 ppb (3) 14.9 μg/m3 (14) 9.0 μg/m3 (38) 38.0
 
Feb. 26, 2021, 10 a.m. 67.0 ppb (65) 46.0 ppb (44) 69.0 ppb (67) 21.0 ppb (20) N/A 0.0 ppb (0) 11.0 ppb (11) 0.59 ppb (7) 23.4 μg/m3 (22) 14.9 μg/m3 (57) 67.0
 
Feb. 26, 2021, 9 a.m. 94.1 ppb (94) 69.4 ppb (68) 100.0 ppb (100) 25.0 ppb (24) N/A 0.0 ppb (0) 0.0 ppb (0) 0.87 ppb (11) 30.8 μg/m3 (29) 21.0 μg/m3 (70) 100.0
 
Feb. 26, 2021, 8 a.m. 92.3 ppb (92) 67.2 ppb (66) 99.0 ppb (99) 25.0 ppb (24) N/A 0.0 ppb (0) 0.0 ppb (0) 0.84 ppb (10) 30.9 μg/m3 (29) 20.2 μg/m3 (69) 99.0
 
Feb. 26, 2021, 7 a.m. 104.2 ppb (102) 78.2 ppb (77) 106.0 ppb (102) 26.0 ppb (25) N/A 1.0 ppb (2) 0.0 ppb (0) 0.86 ppb (11) 30.2 μg/m3 (28) 19.4 μg/m3 (67) 102.0
 
Feb. 26, 2021, 6 a.m. 107.1 ppb (103) 77.5 ppb (77) 119.0 ppb (105) 29.0 ppb (28) N/A 1.0 ppb (2) 0.0 ppb (0) 0.87 ppb (11) 32.0 μg/m3 (30) 19.2 μg/m3 (66) 105.0
 
Feb. 26, 2021, 5 a.m. 107.1 ppb (103) 74.2 ppb (73) 113.0 ppb (104) 33.0 ppb (32) N/A 1.0 ppb (2) 0.0 ppb (0) 0.87 ppb (11) 29.3 μg/m3 (28) 17.6 μg/m3 (63) 104.0
 
Feb. 26, 2021, 4 a.m. 125.6 ppb (106) 85.8 ppb (85) 147.0 ppb (110) 40.0 ppb (38) N/A 1.0 ppb (2) 0.0 ppb (0) 0.92 ppb (11) 27.2 μg/m3 (26) 17.5 μg/m3 (63) 110.0
 
Feb. 26, 2021, 3 a.m. 93.7 ppb (94) 52.8 ppb (50) 103.0 ppb (102) 41.0 ppb (39) N/A 1.0 ppb (2) 0.0 ppb (0) 0.77 ppb (10) 26.3 μg/m3 (25) 16.8 μg/m3 (61) 102.0
 
Feb. 26, 2021, 2 a.m. 68.6 ppb (67) 24.3 ppb (23) 107.0 ppb (103) 44.0 ppb (42) N/A 1.0 ppb (2) 0.0 ppb (0) 0.6 ppb (7) 24.6 μg/m3 (23) 15.1 μg/m3 (58) 103.0
 
Feb. 26, 2021, 1 a.m. 47.5 ppb (45) 4.3 ppb (5) 48.0 ppb (46) 43.0 ppb (41) N/A 1.0 ppb (2) 4.0 ppb (4) 0.49 ppb (6) 24.8 μg/m3 (23) 16.7 μg/m3 (61) 61.0
 
Feb. 26, 2021, midnight 35.5 ppb (34) 0.2 ppb (1) 37.0 ppb (35) 35.0 ppb (34) N/A 1.0 ppb (2) 17.0 ppb (16) 0.45 ppb (6) 24.9 μg/m3 (24) 16.0 μg/m3 (60) 60.0
 
Feb. 25, 2021, 11 p.m. N/A N/A 13.0 ppb (13) N/A N/A 1.0 ppb (2) 43.0 ppb (40) 0.27 ppb (4) 22.2 μg/m3 (21) 13.9 μg/m3 (55) 55.0
 
Feb. 25, 2021, 10 p.m. N/A N/A 9.0 ppb (9) N/A N/A 1.0 ppb (2) 48.0 ppb (45) 0.21 ppb (3) 18.1 μg/m3 (17) 9.9 μg/m3 (42) 45.0
 
Feb. 25, 2021, 9 p.m. N/A N/A 6.0 ppb (6) N/A N/A 0.0 ppb (0) 53.0 ppb (50) 0.2 ppb (3) 16.4 μg/m3 (16) 7.9 μg/m3 (33) 50.0
 
Feb. 25, 2021, 8 p.m. N/A N/A 5.0 ppb (5) N/A N/A 0.0 ppb (0) 54.0 ppb (50) 0.2 ppb (3) 17.6 μg/m3 (17) 8.2 μg/m3 (35) 50.0
 
Feb. 25, 2021, 7 p.m. N/A N/A 5.0 ppb (5) N/A N/A 0.0 ppb (0) 55.0 ppb (51) 0.2 ppb (3) 18.2 μg/m3 (17) 9.1 μg/m3 (38) 51.0
 
Feb. 25, 2021, 6 p.m. 8.1 ppb (8) 0.6 ppb (1) 6.0 ppb (6) 8.0 ppb (8) N/A 0.0 ppb (0) 53.0 ppb (50) 0.22 ppb (3) 21.5 μg/m3 (20) 10.5 μg/m3 (44) 50.0
 
Feb. 25, 2021, 5 p.m. 9.3 ppb (9) 1.0 ppb (1) 8.0 ppb (8) 8.0 ppb (8) N/A 0.0 ppb (0) 48.0 ppb (45) 0.23 ppb (3) 21.5 μg/m3 (20) 11.6 μg/m3 (49) 49.0
 
Feb. 25, 2021, 4 p.m. 11.5 ppb (11) 1.8 ppb (2) 10.0 ppb (10) 10.0 ppb (10) N/A 0.0 ppb (0) 42.0 ppb (39) 0.25 ppb (3) 26.0 μg/m3 (25) 14.1 μg/m3 (56) 56.0
 
Feb. 25, 2021, 3 p.m. 17.7 ppb (17) 3.6 ppb (4) 17.0 ppb (17) 14.0 ppb (14) N/A 1.0 ppb (2) 33.0 ppb (31) 0.3 ppb (4) 34.6 μg/m3 (33) 20.3 μg/m3 (69) 69.0
 
Feb. 25, 2021, 2 p.m. 17.4 ppb (17) 3.3 ppb (4) 17.0 ppb (17) 14.0 ppb (14) N/A 1.0 ppb (2) 29.0 ppb (27) 0.32 ppb (4) 37.1 μg/m3 (35) 26.7 μg/m3 (82) 82.0
 
Feb. 25, 2021, 1 p.m. 51.5 ppb (49) 24.3 ppb (23) 36.0 ppb (34) 27.0 ppb (26) N/A 0.0 ppb (0) 9.0 ppb (9) 0.55 ppb (7) 42.1 μg/m3 (39) 32.1 μg/m3 (94) 94.0
 
Feb. 25, 2021, noon 104.4 ppb (102) 79.1 ppb (78) 80.0 ppb (79) 25.0 ppb (24) N/A 1.0 ppb (2) 0.0 ppb (0) 0.84 ppb (10) 39.2 μg/m3 (37) 24.6 μg/m3 (78) 102.0
 
Feb. 25, 2021, 11 a.m. 122.2 ppb (106) 102.8 ppb (102) 130.0 ppb (107) 19.0 ppb (18) N/A 1.0 ppb (2) 0.0 ppb (0) 0.84 ppb (10) 31.6 μg/m3 (30) 20.4 μg/m3 (69) 107.0
 
Feb. 25, 2021, 10 a.m. 127.6 ppb (107) 106.3 ppb (103) 140.0 ppb (109) 21.0 ppb (20) N/A 1.0 ppb (2) 0.0 ppb (0) 0.88 ppb (11) 33.2 μg/m3 (31) 20.3 μg/m3 (69) 109.0
 
Feb. 25, 2021, 9 a.m. 117.7 ppb (105) 93.6 ppb (94) 124.0 ppb (106) 24.0 ppb (23) N/A 1.0 ppb (2) 0.0 ppb (0) 0.87 ppb (11) 33.7 μg/m3 (32) 21.4 μg/m3 (71) 106.0
 
Feb. 25, 2021, 8 a.m. 104.7 ppb (102) 81.0 ppb (80) 107.0 ppb (103) 24.0 ppb (23) N/A 1.0 ppb (2) 0.0 ppb (0) 0.84 ppb (10) 33.7 μg/m3 (32) 21.2 μg/m3 (71) 103.0
 
Feb. 25, 2021, 7 a.m. 113.7 ppb (104) 86.2 ppb (86) 126.0 ppb (106) 27.0 ppb (26) N/A 1.0 ppb (2) 0.0 ppb (0) 0.83 ppb (10) 32.4 μg/m3 (30) 20.6 μg/m3 (69) 106.0
 
Feb. 25, 2021, 6 a.m. 110.8 ppb (103) 77.0 ppb (76) 116.0 ppb (104) 34.0 ppb (33) N/A 1.0 ppb (2) 0.0 ppb (0) 0.81 ppb (10) 35.3 μg/m3 (33) 20.9 μg/m3 (70) 104.0
 
Feb. 25, 2021, 5 a.m. 78.2 ppb (77) 47.3 ppb (45) 107.0 ppb (103) 31.0 ppb (30) N/A 0.0 ppb (0) 0.0 ppb (0) 0.68 ppb (8) 33.7 μg/m3 (32) 20.5 μg/m3 (69) 103.0
 
Feb. 25, 2021, 4 a.m. 84.7 ppb (84) 49.6 ppb (47) 88.0 ppb (88) 35.0 ppb (34) N/A 0.0 ppb (0) 0.0 ppb (0) 0.74 ppb (8) 33.7 μg/m3 (32) 21.3 μg/m3 (71) 88.0
 
Feb. 25, 2021, 3 a.m. 119.2 ppb (105) 78.4 ppb (77) 145.0 ppb (110) 41.0 ppb (39) N/A 1.0 ppb (2) 0.0 ppb (0) 0.91 ppb (11) 35.3 μg/m3 (33) 21.0 μg/m3 (70) 110.0
 
Feb. 25, 2021, 2 a.m. 189.2 ppb (118) 138.2 ppb (109) 198.0 ppb (120) 51.0 ppb (49) N/A 1.0 ppb (2) 0.0 ppb (0) 1.12 ppb (13) 34.2 μg/m3 (32) 18.3 μg/m3 (65) 120.0
 
Feb. 25, 2021, 1 a.m. 77.4 ppb (76) 35.0 ppb (34) 106.0 ppb (102) N/A N/A 0.0 ppb (0) 8.0 ppb (8) 0.57 ppb (7) 27.9 μg/m3 (26) 14.2 μg/m3 (56) 102.0
 
Feb. 25, 2021, midnight 8.3 ppb (8) -0.2 ppb (0) 11.0 ppb (11) 9.0 ppb (9) N/A 0.0 ppb (0) 44.0 ppb (41) 0.24 ppb (3) 21.0 μg/m3 (20) 12.8 μg/m3 (53) 53.0
 
Feb. 24, 2021, 11 p.m. 4.7 ppb (5) -0.2 ppb (0) 4.0 ppb (4) 5.0 ppb (5) N/A 0.0 ppb (0) 53.0 ppb (50) 0.2 ppb (3) 18.3 μg/m3 (17) 10.8 μg/m3 (46) 50.0
 
Feb. 24, 2021, 10 p.m. 3.9 ppb (4) -0.2 ppb (0) 2.0 ppb (2) 4.0 ppb (4) N/A 0.0 ppb (0) 53.0 ppb (50) 0.18 ppb (3) 17.6 μg/m3 (17) 10.1 μg/m3 (43) 50.0
 
Feb. 24, 2021, 9 p.m. 4.3 ppb (5) -0.1 ppb (0) 2.0 ppb (2) 5.0 ppb (5) N/A 0.0 ppb (0) 55.0 ppb (51) 0.18 ppb (3) 18.8 μg/m3 (18) 10.0 μg/m3 (42) 51.0
 
Feb. 24, 2021, 8 p.m. 4.7 ppb (5) 0.0 ppb (0) 2.0 ppb (2) 5.0 ppb (5) N/A 0.0 ppb (0) 53.0 ppb (50) 0.18 ppb (3) 19.4 μg/m3 (18) 10.9 μg/m3 (46) 50.0
 
Feb. 24, 2021, 7 p.m. 5.2 ppb (5) 0.1 ppb (1) 2.0 ppb (2) 5.0 ppb (5) N/A 0.0 ppb (0) 53.0 ppb (50) 0.19 ppb (3) 20.4 μg/m3 (19) 11.9 μg/m3 (50) 50.0
 
Feb. 24, 2021, 6 p.m. 5.1 ppb (5) 0.1 ppb (1) 2.0 ppb (2) 5.0 ppb (5) N/A 0.0 ppb (0) 49.0 ppb (46) 0.17 ppb (3) 13.8 μg/m3 (13) 6.8 μg/m3 (29) 46.0
 
Feb. 24, 2021, 5 p.m. 6.0 ppb (6) 0.3 ppb (1) 3.0 ppb (3) 6.0 ppb (6) N/A 0.0 ppb (0) 47.0 ppb (44) 0.16 ppb (3) 13.6 μg/m3 (13) 6.5 μg/m3 (28) 44.0
 
Feb. 24, 2021, 4 p.m. 17.3 ppb (17) 3.4 ppb (4) 15.0 ppb (15) 14.0 ppb (14) N/A 1.0 ppb (2) 37.0 ppb (35) N/A 16.6 μg/m3 (16) 7.5 μg/m3 (32) 35.0
 
Feb. 24, 2021, 3 p.m. 57.0 ppb (55) 27.0 ppb (26) 57.0 ppb (55) 30.0 ppb (29) N/A 2.0 ppb (3) 21.0 ppb (20) N/A 29.7 μg/m3 (28) 15.1 μg/m3 (58) 58.0
 
Feb. 24, 2021, 2 p.m. 192.1 ppb (119) 158.8 ppb (112) 195.0 ppb (119) 33.0 ppb (32) N/A 2.0 ppb (3) 1.0 ppb (1) 1.21 ppb (14) 46.1 μg/m3 (43) 27.0 μg/m3 (83) 119.0
 
Feb. 24, 2021, 1 p.m. 179.6 ppb (116) 162.5 ppb (113) 186.0 ppb (118) 17.0 ppb (17) N/A 1.0 ppb (2) 0.0 ppb (0) 1.2 ppb (14) 36.7 μg/m3 (34) 24.9 μg/m3 (78) 118.0
 
Feb. 24, 2021, noon 179.7 ppb (116) 163.4 ppb (113) 198.0 ppb (120) 16.0 ppb (16) N/A 1.0 ppb (2) 0.0 ppb (0) 1.17 ppb (14) 35.9 μg/m3 (34) 24.5 μg/m3 (78) 120.0
 
Feb. 24, 2021, 11 a.m. 160.1 ppb (113) 142.4 ppb (109) 174.0 ppb (115) 18.0 ppb (17) N/A 1.0 ppb (2) 0.0 ppb (0) 1.08 ppb (13) 32.1 μg/m3 (30) 24.1 μg/m3 (77) 115.0
 
Feb. 24, 2021, 10 a.m. 104.2 ppb (102) 86.5 ppb (86) 115.0 ppb (104) 18.0 ppb (17) N/A 1.0 ppb (2) 0.0 ppb (0) 0.94 ppb (11) 32.0 μg/m3 (30) 23.0 μg/m3 (74) 104.0
 
Feb. 24, 2021, 9 a.m. 90.7 ppb (91) 70.7 ppb (69) 94.0 ppb (94) 20.0 ppb (19) N/A 0.0 ppb (0) 0.0 ppb (0) 0.88 ppb (11) 32.5 μg/m3 (31) 20.8 μg/m3 (70) 94.0
 
Feb. 24, 2021, 8 a.m. 90.3 ppb (90) 69.7 ppb (68) 94.0 ppb (94) 21.0 ppb (20) N/A 0.0 ppb (0) 0.0 ppb (0) 0.8 ppb (10) 25.7 μg/m3 (24) 15.8 μg/m3 (59) 94.0
 
Feb. 24, 2021, 7 a.m. 117.6 ppb (105) 94.1 ppb (94) 125.0 ppb (106) 23.0 ppb (22) N/A 1.0 ppb (2) 0.0 ppb (0) 0.83 ppb (10) 21.1 μg/m3 (20) 11.1 μg/m3 (47) 106.0
 
Feb. 24, 2021, 6 a.m. 126.6 ppb (106) 99.6 ppb (100) 134.0 ppb (108) 27.0 ppb (26) N/A 1.0 ppb (2) 0.0 ppb (0) 0.92 ppb (11) 19.4 μg/m3 (18) 9.9 μg/m3 (42) 108.0
 
Feb. 24, 2021, 5 a.m. 110.2 ppb (103) 81.2 ppb (80) 120.0 ppb (105) 29.0 ppb (28) N/A 1.0 ppb (2) 0.0 ppb (0) 0.81 ppb (10) 17.7 μg/m3 (17) 8.7 μg/m3 (37) 105.0
 
Feb. 24, 2021, 4 a.m. 128.7 ppb (107) 95.4 ppb (96) 126.0 ppb (106) 33.0 ppb (32) N/A 1.0 ppb (2) 0.0 ppb (0) 0.83 ppb (10) 17.9 μg/m3 (17) 8.4 μg/m3 (36) 107.0
 
Feb. 24, 2021, 3 a.m. 136.1 ppb (108) 101.1 ppb (102) 148.0 ppb (110) 35.0 ppb (34) N/A 1.0 ppb (2) 0.0 ppb (0) 0.82 ppb (10) 16.8 μg/m3 (16) 7.8 μg/m3 (33) 110.0
 
Feb. 24, 2021, 2 a.m. 100.0 ppb (100) 62.8 ppb (61) 138.0 ppb (108) 37.0 ppb (35) N/A 0.0 ppb (0) 1.0 ppb (1) 0.63 ppb (7) 13.4 μg/m3 (13) 5.8 μg/m3 (25) 108.0
 
Feb. 24, 2021, 1 a.m. 51.9 ppb (49) 11.7 ppb (12) 63.0 ppb (61) 40.0 ppb (38) N/A 0.0 ppb (0) 2.0 ppb (2) 0.41 ppb (5) 11.7 μg/m3 (11) 4.7 μg/m3 (20) 61.0
 
Feb. 24, 2021, midnight 21.8 ppb (21) -0.2 ppb (0) 25.0 ppb (24) 22.0 ppb (21) N/A 0.0 ppb (0) 21.0 ppb (20) 0.27 ppb (4) 10.6 μg/m3 (10) 3.9 μg/m3 (17) 24.0
 
Feb. 23, 2021, 11 p.m. 7.3 ppb (7) -0.2 ppb (0) 6.0 ppb (6) 8.0 ppb (8) N/A 0.0 ppb (0) 38.0 ppb (36) 0.17 ppb (3) 9.6 μg/m3 (9) 3.5 μg/m3 (15) 36.0
 
Feb. 23, 2021, 10 p.m. 5.4 ppb (6) -0.1 ppb (0) 4.0 ppb (4) 6.0 ppb (6) N/A 0.0 ppb (0) 42.0 ppb (39) 0.15 ppb (2) 9.4 μg/m3 (9) 2.7 μg/m3 (12) 39.0
 
Feb. 23, 2021, 9 p.m. 5.0 ppb (5) 0.1 ppb (1) 3.0 ppb (3) 5.0 ppb (5) N/A 0.0 ppb (0) 44.0 ppb (41) 0.14 ppb (2) 10.3 μg/m3 (10) 3.0 μg/m3 (13) 41.0
 
Feb. 23, 2021, 8 p.m. 5.8 ppb (6) 0.3 ppb (1) 3.0 ppb (3) 6.0 ppb (6) N/A 0.0 ppb (0) 46.0 ppb (43) 0.16 ppb (3) 11.9 μg/m3 (12) 5.5 μg/m3 (23) 43.0
 
Feb. 23, 2021, 7 p.m. 5.5 ppb (6) 0.3 ppb (1) 3.0 ppb (3) 5.0 ppb (5) N/A N/A 46.0 ppb (43) 0.15 ppb (2) 12.1 μg/m3 (12) 4.7 μg/m3 (20) 43.0
 
Feb. 23, 2021, 6 p.m. 6.3 ppb (6) 0.5 ppb (1) 4.0 ppb (4) 6.0 ppb (6) N/A N/A 45.0 ppb (42) 0.15 ppb (2) 11.0 μg/m3 (11) 3.2 μg/m3 (14) 42.0
 
Feb. 23, 2021, 5 p.m. 6.7 ppb (7) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 41.0 ppb (38) 0.15 ppb (2) 10.4 μg/m3 (10) 3.5 μg/m3 (15) 38.0
 
Feb. 23, 2021, 4 p.m. 7.8 ppb (8) 1.4 ppb (2) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 36.0 ppb (34) 0.16 ppb (3) 9.8 μg/m3 (10) 3.8 μg/m3 (16) 34.0
 
Feb. 23, 2021, 3 p.m. 9.0 ppb (9) 1.7 ppb (2) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 33.0 ppb (31) 0.17 ppb (3) 9.4 μg/m3 (9) 3.9 μg/m3 (17) 31.0
 
Feb. 23, 2021, 2 p.m. 19.7 ppb (19) 5.5 ppb (6) N/A 14.0 ppb (14) N/A 1.0 ppb (2) 24.0 ppb (23) 0.21 ppb (3) 12.2 μg/m3 (12) 4.6 μg/m3 (20) 23.0
 
Feb. 23, 2021, 1 p.m. 61.2 ppb (59) 31.2 ppb (30) 57.0 ppb (55) 30.0 ppb (29) N/A 1.0 ppb (2) 6.0 ppb (6) 0.4 ppb (5) 12.4 μg/m3 (12) 5.6 μg/m3 (24) 59.0
 
Feb. 23, 2021, noon 80.3 ppb (80) 51.8 ppb (49) 83.0 ppb (82) 28.0 ppb (27) N/A 0.0 ppb (0) 0.0 ppb (0) 0.49 ppb (6) 10.9 μg/m3 (11) 5.5 μg/m3 (23) 82.0
 
Feb. 23, 2021, 11 a.m. 43.5 ppb (42) 16.3 ppb (16) 32.0 ppb (31) 27.0 ppb (26) N/A 0.0 ppb (0) 0.0 ppb (0) 0.31 ppb (4) 9.2 μg/m3 (9) 5.0 μg/m3 (21) 42.0
 
Feb. 23, 2021, 10 a.m. 41.0 ppb (39) 14.1 ppb (14) 26.0 ppb (25) 27.0 ppb (26) N/A 0.0 ppb (0) 1.0 ppb (1) 0.26 ppb (4) 9.5 μg/m3 (9) 5.0 μg/m3 (21) 39.0
 
Feb. 23, 2021, 9 a.m. 33.4 ppb (32) 4.9 ppb (5) 28.0 ppb (27) 29.0 ppb (28) N/A 0.0 ppb (0) 2.0 ppb (2) 0.25 ppb (3) 9.2 μg/m3 (9) 4.6 μg/m3 (20) 32.0
 
Feb. 23, 2021, 8 a.m. 30.5 ppb (29) 2.5 ppb (3) 30.0 ppb (29) 28.0 ppb (27) N/A 0.0 ppb (0) 4.0 ppb (4) 0.23 ppb (3) 9.2 μg/m3 (9) 4.7 μg/m3 (20) 29.0
 
Feb. 23, 2021, 7 a.m. 17.8 ppb (17) -0.2 ppb (0) 20.0 ppb (19) 18.0 ppb (17) N/A 0.0 ppb (0) 15.0 ppb (14) 0.19 ppb (3) 9.3 μg/m3 (9) 4.7 μg/m3 (20) 20.0
 
Feb. 23, 2021, 6 a.m. 13.8 ppb (14) -0.2 ppb (0) 15.0 ppb (15) 14.0 ppb (14) N/A 0.0 ppb (0) 19.0 ppb (18) 0.2 ppb (3) 8.4 μg/m3 (8) 4.7 μg/m3 (20) 20.0
 
Feb. 23, 2021, 5 a.m. 11.2 ppb (11) -0.3 ppb (0) 12.0 ppb (12) 12.0 ppb (12) N/A 0.0 ppb (0) 22.0 ppb (21) 0.19 ppb (3) 8.1 μg/m3 (8) 4.6 μg/m3 (20) 21.0
 
Feb. 23, 2021, 4 a.m. 8.3 ppb (8) -0.3 ppb (0) 8.0 ppb (8) 9.0 ppb (9) N/A 0.0 ppb (0) 28.0 ppb (26) 0.18 ppb (3) 9.0 μg/m3 (9) 4.9 μg/m3 (21) 26.0
 
Feb. 23, 2021, 3 a.m. 10.2 ppb (10) -0.3 ppb (0) 9.0 ppb (9) 11.0 ppb (11) N/A 0.0 ppb (0) 26.0 ppb (25) 0.2 ppb (3) 8.8 μg/m3 (9) 5.2 μg/m3 (22) 25.0
 
Feb. 23, 2021, 2 a.m. 11.5 ppb (11) -0.3 ppb (0) 11.0 ppb (11) 12.0 ppb (12) N/A N/A 26.0 ppb (25) 0.21 ppb (3) 9.5 μg/m3 (9) 5.4 μg/m3 (23) 25.0
 
Feb. 23, 2021, 1 a.m. 10.0 ppb (10) -0.3 ppb (0) 10.0 ppb (10) 10.0 ppb (10) N/A N/A 31.0 ppb (29) 0.19 ppb (3) 8.8 μg/m3 (9) 5.3 μg/m3 (23) 29.0
 
Feb. 23, 2021, midnight 11.1 ppb (11) -0.3 ppb (0) 11.0 ppb (11) 12.0 ppb (12) N/A N/A 30.0 ppb (28) 0.19 ppb (3) 8.8 μg/m3 (9) 4.2 μg/m3 (18) 28.0
 
Feb. 22, 2021, 11 p.m. 8.0 ppb (8) -0.2 ppb (0) 7.0 ppb (7) 8.0 ppb (8) N/A 0.0 ppb (0) 34.0 ppb (32) 0.17 ppb (3) 7.6 μg/m3 (8) 3.4 μg/m3 (15) 32.0
 
Feb. 22, 2021, 10 p.m. 4.1 ppb (4) -0.1 ppb (0) 3.0 ppb (3) 4.0 ppb (4) N/A 0.0 ppb (0) 39.0 ppb (37) 0.15 ppb (2) 7.3 μg/m3 (7) 3.1 μg/m3 (13) 37.0
 
Feb. 22, 2021, 9 p.m. 3.5 ppb (4) 0.1 ppb (1) 3.0 ppb (3) 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (38) 0.15 ppb (2) 8.0 μg/m3 (8) 3.3 μg/m3 (14) 38.0
 
Feb. 22, 2021, 8 p.m. 3.0 ppb (3) 0.2 ppb (1) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (38) 0.15 ppb (2) 8.8 μg/m3 (9) 4.2 μg/m3 (18) 38.0
 
Feb. 22, 2021, 7 p.m. 3.7 ppb (4) 0.4 ppb (1) 4.0 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (32) 0.17 ppb (3) 7.2 μg/m3 (7) 3.7 μg/m3 (16) 32.0
 
Feb. 22, 2021, 6 p.m. 4.7 ppb (5) 0.8 ppb (1) 5.0 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (28) 0.18 ppb (3) 6.1 μg/m3 (6) 3.3 μg/m3 (14) 28.0
 
Feb. 22, 2021, 5 p.m. 8.9 ppb (9) 0.9 ppb (1) 9.0 ppb (9) 8.0 ppb (8) N/A 0.0 ppb (0) 24.0 ppb (23) 0.18 ppb (3) 10.2 μg/m3 (10) 5.1 μg/m3 (22) 23.0
 
Feb. 22, 2021, 4 p.m. 6.2 ppb (6) 0.3 ppb (1) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 24.0 ppb (23) 0.17 ppb (3) 9.2 μg/m3 (9) 5.0 μg/m3 (21) 23.0
 
Feb. 22, 2021, 3 p.m. 3.8 ppb (4) 0.2 ppb (1) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (26) 0.16 ppb (3) 10.0 μg/m3 (10) 5.5 μg/m3 (23) 26.0
 
Feb. 22, 2021, 2 p.m. 4.9 ppb (5) 0.0 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 26.0 ppb (25) 0.16 ppb (3) 11.7 μg/m3 (11) 6.6 μg/m3 (28) 28.0
 
Feb. 22, 2021, 1 p.m. 5.4 ppb (6) -0.1 ppb (0) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 25.0 ppb (24) 0.16 ppb (3) 12.5 μg/m3 (12) 7.0 μg/m3 (30) 30.0
 
Feb. 22, 2021, noon 4.8 ppb (5) -0.3 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 25.0 ppb (24) 0.15 ppb (2) 13.1 μg/m3 (13) 7.1 μg/m3 (30) 30.0
 
Feb. 22, 2021, 11 a.m. 2.1 ppb (2) -0.4 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (27) 0.15 ppb (2) 12.5 μg/m3 (12) 6.8 μg/m3 (29) 29.0
 
Feb. 22, 2021, 10 a.m. 1.7 ppb (2) -0.4 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (28) 0.14 ppb (2) 12.0 μg/m3 (12) 6.6 μg/m3 (28) 28.0
 
Feb. 22, 2021, 9 a.m. 2.2 ppb (3) -0.4 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.14 ppb (2) 11.7 μg/m3 (11) 6.4 μg/m3 (27) 27.0
 
Feb. 22, 2021, 8 a.m. 1.2 ppb (2) -0.4 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.14 ppb (2) 12.4 μg/m3 (12) 6.5 μg/m3 (28) 28.0
 
Feb. 22, 2021, 7 a.m. 0.8 ppb (1) -0.4 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) 0.14 ppb (2) 13.6 μg/m3 (13) 6.8 μg/m3 (29) 35.0
 
Feb. 22, 2021, 6 a.m. 2.1 ppb (2) -0.4 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (35) 0.17 ppb (3) 12.5 μg/m3 (12) 6.6 μg/m3 (28) 35.0
 
Feb. 22, 2021, 5 a.m. 4.2 ppb (4) -0.3 ppb (0) 4.0 ppb (4) 5.0 ppb (5) N/A 0.0 ppb (0) 35.0 ppb (33) 0.18 ppb (3) 11.8 μg/m3 (11) 6.2 μg/m3 (26) 33.0
 
Feb. 22, 2021, 4 a.m. 2.3 ppb (3) -0.3 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (35) 0.18 ppb (3) 11.5 μg/m3 (11) 6.1 μg/m3 (26) 35.0
 
Feb. 22, 2021, 3 a.m. 1.3 ppb (2) -0.3 ppb (0) 1.0 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (36) 0.18 ppb (3) 10.2 μg/m3 (10) 6.5 μg/m3 (28) 36.0
 
Feb. 22, 2021, 2 a.m. 2.1 ppb (2) -0.3 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (37) 0.19 ppb (3) 10.8 μg/m3 (10) 6.1 μg/m3 (26) 37.0
 
Feb. 22, 2021, 1 a.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 (37) 0.19 ppb (3) 9.4 μg/m3 (9) 5.5 μg/m3 (23) 37.0
 
Feb. 22, 2021, midnight 2.8 ppb (3) -0.3 ppb (0) 2.0 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (38) 0.19 ppb (3) 8.8 μg/m3 (9) 5.2 μg/m3 (22) 38.0