ID: 512

AQSQID: 270031002

Site Name: Blaine

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

Updated: March 7, 2021, 2:32 p.m.

Location: Blaine (Airport Rd Neast), MN

Reporting: True, Located: True

Current AQI: 42.0

Blaine (Airport Rd Neast) MN, US: 45.1425, -93.2139

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 7, 2021, 1 p.m. 4.8 ppb (5) 0.0 ppb (0) 6.1 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 40.0 ppb (38) 0.13 ppb (2) 16.0 μg/m3 (15) 10.0 μg/m3 (42) 42.0
 
March 7, 2021, noon 4.0 ppb (4) 0.0 ppb (0) 5.3 ppb (5) 4.0 ppb (4) N/A N/A 41.0 ppb (38) 0.12 ppb (2) 15.0 μg/m3 (14) 11.0 μg/m3 (46) 46.0
 
March 7, 2021, 11 a.m. 2.8 ppb (3) 0.0 ppb (0) 4.3 ppb (5) 3.0 ppb (3) N/A N/A 43.0 ppb (40) 0.13 ppb (2) 14.0 μg/m3 (13) 8.0 μg/m3 (34) 40.0
 
March 7, 2021, 10 a.m. 3.2 ppb (4) 0.0 ppb (0) 4.4 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (39) N/A 15.0 μg/m3 (14) 10.0 μg/m3 (42) 42.0
 
March 7, 2021, 9 a.m. 3.4 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 42.0 ppb (39) 0.13 ppb (2) 16.0 μg/m3 (15) 14.0 μg/m3 (55) 55.0
 
March 7, 2021, 8 a.m. 3.5 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (38) 0.14 ppb (2) 11.0 μg/m3 (11) 16.0 μg/m3 (60) 60.0
 
March 7, 2021, 7 a.m. 5.0 ppb (5) -0.1 ppb (0) 6.2 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 36.0 ppb (34) 0.18 ppb (3) 9.0 μg/m3 (9) 7.0 μg/m3 (30) 34.0
 
March 7, 2021, 6 a.m. 6.0 ppb (6) -0.1 ppb (0) 6.9 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.18 ppb (3) 13.0 μg/m3 (13) 7.0 μg/m3 (30) 30.0
 
March 7, 2021, 5 a.m. 7.6 ppb (8) 0.0 ppb (0) 8.8 ppb (9) 8.0 ppb (8) N/A 0.0 ppb (0) 34.0 ppb (32) 0.21 ppb (3) 12.0 μg/m3 (12) 8.0 μg/m3 (34) 34.0
 
March 7, 2021, 4 a.m. 9.6 ppb (10) 0.0 ppb (0) 10.5 ppb (10) 10.0 ppb (10) N/A 0.0 ppb (0) 33.0 ppb (31) 0.23 ppb (3) 16.0 μg/m3 (15) 9.0 μg/m3 (38) 38.0
 
March 7, 2021, 3 a.m. 9.4 ppb (9) 0.0 ppb (0) 10.8 ppb (11) 9.0 ppb (9) N/A 0.0 ppb (0) 35.0 ppb (33) 0.24 ppb (3) 18.0 μg/m3 (17) 15.0 μg/m3 (58) 58.0
 
March 7, 2021, 2 a.m. 7.4 ppb (7) -0.1 ppb (0) 8.1 ppb (8) 8.0 ppb (8) N/A 0.0 ppb (0) 38.0 ppb (36) 0.24 ppb (3) 12.0 μg/m3 (12) 10.0 μg/m3 (42) 42.0
 
March 7, 2021, 1 a.m. 4.3 ppb (5) -0.1 ppb (0) 5.4 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 42.0 ppb (39) 0.21 ppb (3) 15.0 μg/m3 (14) 12.0 μg/m3 (50) 50.0
 
March 7, 2021, midnight 2.5 ppb (3) -0.1 ppb (0) 3.5 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (42) 0.16 ppb (3) 10.0 μg/m3 (10) 6.0 μg/m3 (25) 42.0
 
March 6, 2021, 11 p.m. 1.6 ppb (2) 0.0 ppb (0) 2.6 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (44) 0.14 ppb (2) 12.0 μg/m3 (12) 6.0 μg/m3 (25) 44.0
 
March 6, 2021, 10 p.m. 1.6 ppb (2) 0.0 ppb (0) 2.5 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 49.0 ppb (46) 0.14 ppb (2) 6.0 μg/m3 (6) 5.0 μg/m3 (21) 46.0
 
March 6, 2021, 9 p.m. 1.4 ppb (2) 0.0 ppb (0) 2.1 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (46) 0.14 ppb (2) 9.0 μg/m3 (9) 6.0 μg/m3 (25) 46.0
 
March 6, 2021, 8 p.m. 1.3 ppb (2) 0.0 ppb (0) 2.0 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (45) 0.13 ppb (2) 9.0 μg/m3 (9) 2.0 μg/m3 (9) 45.0
 
March 6, 2021, 7 p.m. 1.7 ppb (2) 0.0 ppb (0) 2.3 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (43) 0.14 ppb (2) 7.0 μg/m3 (7) 1.0 μg/m3 (5) 43.0
 
March 6, 2021, 6 p.m. 1.8 ppb (2) 0.1 ppb (1) 2.3 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (41) 0.13 ppb (2) 5.0 μg/m3 (5) 1.0 μg/m3 (5) 41.0
 
March 6, 2021, 5 p.m. 2.0 ppb (2) 0.2 ppb (1) 2.5 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (40) 0.12 ppb (2) 7.0 μg/m3 (7) 1.0 μg/m3 (5) 40.0
 
March 6, 2021, 4 p.m. 3.2 ppb (4) 0.5 ppb (1) 3.5 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (38) 0.13 ppb (2) 10.0 μg/m3 (10) 4.0 μg/m3 (17) 38.0
 
March 6, 2021, 3 p.m. 7.7 ppb (8) 1.5 ppb (2) 7.9 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 36.0 ppb (34) 0.16 ppb (3) 12.0 μg/m3 (12) 9.0 μg/m3 (38) 38.0
 
March 6, 2021, 2 p.m. 13.7 ppb (13) 2.8 ppb (3) 13.8 ppb (14) 11.0 ppb (11) N/A 0.0 ppb (0) 28.0 ppb (26) 0.22 ppb (3) 10.0 μg/m3 (10) 11.0 μg/m3 (46) 46.0
 
March 6, 2021, 1 p.m. 21.7 ppb (21) 3.0 ppb (3) 23.9 ppb (23) 19.0 ppb (18) N/A 0.0 ppb (0) 18.0 ppb (17) 0.24 ppb (3) 13.0 μg/m3 (13) 9.0 μg/m3 (38) 38.0
 
March 6, 2021, noon 21.9 ppb (21) 1.9 ppb (2) 22.0 ppb (21) 20.0 ppb (19) N/A N/A 15.0 ppb (14) 0.25 ppb (3) 14.0 μg/m3 (13) 10.0 μg/m3 (42) 42.0
 
March 6, 2021, 11 a.m. 24.4 ppb (24) 0.8 ppb (1) 21.9 ppb (21) 24.0 ppb (23) N/A N/A 9.0 ppb (9) 0.32 ppb (4) 18.0 μg/m3 (17) 18.0 μg/m3 (64) 64.0
 
March 6, 2021, 10 a.m. 30.6 ppb (29) 5.2 ppb (5) 30.8 ppb (30) 25.0 ppb (24) N/A 0.0 ppb (0) 6.0 ppb (6) N/A 22.0 μg/m3 (21) 22.0 μg/m3 (72) 72.0
 
March 6, 2021, 9 a.m. 38.6 ppb (37) 9.8 ppb (10) N/A 29.0 ppb (28) N/A 0.0 ppb (0) 3.0 ppb (3) 0.39 ppb (5) 23.0 μg/m3 (22) 22.0 μg/m3 (72) 72.0
 
March 6, 2021, 8 a.m. 30.7 ppb (29) 1.1 ppb (2) N/A 30.0 ppb (29) N/A 0.0 ppb (0) 5.0 ppb (5) 0.36 ppb (5) 26.0 μg/m3 (25) 24.0 μg/m3 (77) 77.0
 
March 6, 2021, 7 a.m. 36.7 ppb (35) 5.2 ppb (5) 39.1 ppb (37) 32.0 ppb (31) N/A 0.0 ppb (0) 4.0 ppb (4) 0.39 ppb (5) 25.0 μg/m3 (24) 23.0 μg/m3 (74) 74.0
 
March 6, 2021, 6 a.m. 35.0 ppb (34) 4.1 ppb (4) 38.2 ppb (37) 31.0 ppb (30) N/A 0.0 ppb (0) 4.0 ppb (4) 0.41 ppb (5) 25.0 μg/m3 (24) 21.0 μg/m3 (70) 70.0
 
March 6, 2021, 5 a.m. 47.6 ppb (45) 11.4 ppb (11) 54.4 ppb (52) 36.0 ppb (34) N/A 0.0 ppb (0) 4.0 ppb (4) 0.52 ppb (6) 32.0 μg/m3 (30) 21.0 μg/m3 (70) 70.0
 
March 6, 2021, 4 a.m. 41.3 ppb (39) 5.2 ppb (5) 50.3 ppb (48) 36.0 ppb (34) N/A 0.0 ppb (0) 4.0 ppb (4) 0.45 ppb (6) 33.0 μg/m3 (31) 19.0 μg/m3 (66) 66.0
 
March 6, 2021, 3 a.m. 38.4 ppb (37) 3.2 ppb (4) 49.4 ppb (47) 35.0 ppb (34) N/A 0.0 ppb (0) 4.0 ppb (4) 0.48 ppb (6) 30.0 μg/m3 (28) 14.0 μg/m3 (55) 55.0
 
March 6, 2021, 2 a.m. 32.1 ppb (31) 1.5 ppb (2) 48.7 ppb (46) 31.0 ppb (30) N/A 0.0 ppb (0) 8.0 ppb (8) 0.45 ppb (6) 34.0 μg/m3 (32) 13.0 μg/m3 (53) 53.0
 
March 6, 2021, 1 a.m. 22.1 ppb (21) 0.1 ppb (1) 23.4 ppb (23) 22.0 ppb (21) N/A 0.0 ppb (0) 20.0 ppb (19) 0.34 ppb (4) 26.0 μg/m3 (25) 9.0 μg/m3 (38) 38.0
 
March 6, 2021, midnight 13.6 ppb (13) 1.2 ppb (2) 13.2 ppb (13) 12.0 ppb (12) N/A 0.0 ppb (0) 31.0 ppb (29) 0.21 ppb (3) 25.0 μg/m3 (24) 4.0 μg/m3 (17) 29.0
 
March 5, 2021, 11 p.m. 4.5 ppb (5) 0.0 ppb (0) 5.8 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 42.0 ppb (39) 0.15 ppb (2) 7.0 μg/m3 (7) 3.0 μg/m3 (13) 39.0
 
March 5, 2021, 10 p.m. 4.5 ppb (5) 0.4 ppb (1) 5.7 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 43.0 ppb (40) 0.14 ppb (2) 6.0 μg/m3 (6) 4.0 μg/m3 (17) 40.0
 
March 5, 2021, 9 p.m. 4.5 ppb (5) 0.5 ppb (1) 5.6 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 42.0 ppb (39) 0.14 ppb (2) 7.0 μg/m3 (7) 1.0 μg/m3 (5) 39.0
 
March 5, 2021, 8 p.m. 5.8 ppb (6) 1.1 ppb (2) 6.9 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 41.0 ppb (38) 0.13 ppb (2) 9.0 μg/m3 (9) 1.0 μg/m3 (5) 38.0
 
March 5, 2021, 7 p.m. 9.4 ppb (9) 2.2 ppb (3) 10.7 ppb (11) 7.0 ppb (7) N/A 0.0 ppb (0) 38.0 ppb (36) 0.16 ppb (3) 15.0 μg/m3 (14) 4.0 μg/m3 (17) 36.0
 
March 5, 2021, 6 p.m. 13.8 ppb (14) 3.8 ppb (4) 15.2 ppb (15) 10.0 ppb (10) N/A 0.0 ppb (0) 35.0 ppb (33) 0.18 ppb (3) 16.0 μg/m3 (15) 6.0 μg/m3 (25) 33.0
 
March 5, 2021, 5 p.m. 17.5 ppb (17) 5.1 ppb (5) 18.7 ppb (18) 12.0 ppb (12) N/A 0.0 ppb (0) 32.0 ppb (30) 0.17 ppb (3) 9.0 μg/m3 (9) 7.0 μg/m3 (30) 30.0
 
March 5, 2021, 4 p.m. 26.4 ppb (25) 6.7 ppb (7) 27.8 ppb (27) 20.0 ppb (19) N/A 1.0 ppb (2) 24.0 ppb (23) 0.23 ppb (3) 20.0 μg/m3 (19) 10.0 μg/m3 (42) 42.0
 
March 5, 2021, 3 p.m. 38.8 ppb (37) 12.2 ppb (12) 40.0 ppb (38) 27.0 ppb (26) N/A 0.0 ppb (0) 16.0 ppb (15) 0.28 ppb (4) 21.0 μg/m3 (20) 12.0 μg/m3 (50) 50.0
 
March 5, 2021, 2 p.m. 46.3 ppb (44) 17.7 ppb (17) 47.2 ppb (45) 29.0 ppb (28) N/A 0.0 ppb (0) 8.0 ppb (8) 0.32 ppb (4) 26.0 μg/m3 (25) 15.0 μg/m3 (58) 58.0
 
March 5, 2021, 1 p.m. 40.1 ppb (38) 12.0 ppb (12) 46.0 ppb (44) 28.0 ppb (27) N/A 0.0 ppb (0) 5.0 ppb (5) 0.35 ppb (4) 31.0 μg/m3 (29) 11.0 μg/m3 (46) 46.0
 
March 5, 2021, noon 21.0 ppb (20) 0.3 ppb (1) 24.7 ppb (24) 21.0 ppb (20) N/A N/A 11.0 ppb (11) 0.3 ppb (4) 21.0 μg/m3 (20) 9.0 μg/m3 (38) 38.0
 
March 5, 2021, 11 a.m. 15.4 ppb (15) 0.0 ppb (0) 16.9 ppb (16) 15.0 ppb (15) N/A N/A 14.0 ppb (13) 0.24 ppb (3) 14.0 μg/m3 (13) 11.0 μg/m3 (46) 46.0
 
March 5, 2021, 10 a.m. 15.6 ppb (15) 0.0 ppb (0) 15.8 ppb (15) 16.0 ppb (16) N/A 0.0 ppb (0) 14.0 ppb (13) N/A 12.0 μg/m3 (12) 13.0 μg/m3 (53) 53.0
 
March 5, 2021, 9 a.m. 18.2 ppb (18) 0.1 ppb (1) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 13.0 ppb (13) 0.23 ppb (3) 20.0 μg/m3 (19) 13.0 μg/m3 (53) 53.0
 
March 5, 2021, 8 a.m. 22.6 ppb (22) 0.2 ppb (1) N/A 22.0 ppb (21) N/A 0.0 ppb (0) 10.0 ppb (10) 0.26 ppb (4) 15.0 μg/m3 (14) 8.0 μg/m3 (34) 34.0
 
March 5, 2021, 7 a.m. 18.6 ppb (18) 1.0 ppb (1) 20.7 ppb (20) 18.0 ppb (17) N/A 0.0 ppb (0) 15.0 ppb (14) 0.22 ppb (3) 12.0 μg/m3 (12) 10.0 μg/m3 (42) 42.0
 
March 5, 2021, 6 a.m. 13.7 ppb (13) 0.3 ppb (1) 18.0 ppb (17) 13.0 ppb (13) N/A 0.0 ppb (0) 21.0 ppb (20) 0.22 ppb (3) 17.0 μg/m3 (16) 13.0 μg/m3 (53) 53.0
 
March 5, 2021, 5 a.m. 10.8 ppb (11) -0.1 ppb (0) 11.9 ppb (12) 11.0 ppb (11) N/A 0.0 ppb (0) 28.0 ppb (26) 0.25 ppb (3) 14.0 μg/m3 (13) 12.0 μg/m3 (50) 50.0
 
March 5, 2021, 4 a.m. 9.9 ppb (10) -0.1 ppb (0) 11.3 ppb (11) 10.0 ppb (10) N/A 0.0 ppb (0) 31.0 ppb (29) 0.24 ppb (3) 12.0 μg/m3 (12) 13.0 μg/m3 (53) 53.0
 
March 5, 2021, 3 a.m. 11.3 ppb (11) 0.0 ppb (0) 11.3 ppb (11) 11.0 ppb (11) N/A 0.0 ppb (0) 29.0 ppb (27) 0.25 ppb (3) 14.0 μg/m3 (13) 14.0 μg/m3 (55) 55.0
 
March 5, 2021, 2 a.m. 7.2 ppb (7) -0.1 ppb (0) 8.4 ppb (8) 7.0 ppb (7) N/A 0.0 ppb (0) 36.0 ppb (34) 0.23 ppb (3) 13.0 μg/m3 (13) 9.0 μg/m3 (38) 38.0
 
March 5, 2021, 1 a.m. 5.8 ppb (6) -0.1 ppb (0) 6.8 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (35) 0.19 ppb (3) 12.0 μg/m3 (12) 8.0 μg/m3 (34) 35.0
 
March 5, 2021, midnight 5.1 ppb (5) 0.0 ppb (0) 5.9 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 39.0 ppb (37) 0.16 ppb (3) 14.0 μg/m3 (13) 3.0 μg/m3 (13) 37.0
 
March 4, 2021, 11 p.m. 3.7 ppb (4) 0.0 ppb (0) 4.6 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 42.0 ppb (39) 0.15 ppb (2) 8.0 μg/m3 (8) 4.0 μg/m3 (17) 39.0
 
March 4, 2021, 10 p.m. 2.6 ppb (3) 0.0 ppb (0) 3.4 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 44.0 ppb (41) 0.13 ppb (2) 6.0 μg/m3 (6) 4.0 μg/m3 (17) 41.0
 
March 4, 2021, 9 p.m. 2.1 ppb (2) 0.1 ppb (1) 3.0 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (42) 0.12 ppb (2) 10.0 μg/m3 (10) 6.0 μg/m3 (25) 42.0
 
March 4, 2021, 8 p.m. 2.1 ppb (2) 0.1 ppb (1) 2.8 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (41) N/A 12.0 μg/m3 (12) 7.0 μg/m3 (30) 41.0
 
March 4, 2021, 7 p.m. 4.5 ppb (5) 1.8 ppb (2) 3.9 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (39) N/A 6.0 μg/m3 (6) 8.0 μg/m3 (34) 39.0
 
March 4, 2021, 6 p.m. 2.4 ppb (3) 0.2 ppb (1) 3.3 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.1 ppb (2) 6.0 μg/m3 (6) 3.0 μg/m3 (13) 13.0
 
March 4, 2021, 5 p.m. 2.6 ppb (3) 0.4 ppb (1) 3.4 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.1 ppb (2) 7.0 μg/m3 (7) 2.0 μg/m3 (9) 9.0
 
March 4, 2021, 4 p.m. 3.3 ppb (4) 0.4 ppb (1) 4.2 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (35) 0.1 ppb (2) 10.0 μg/m3 (10) 7.0 μg/m3 (30) 35.0
 
March 4, 2021, 3 p.m. 4.4 ppb (5) 0.6 ppb (1) 4.5 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (33) 0.13 ppb (2) 12.0 μg/m3 (12) 13.0 μg/m3 (53) 53.0
 
March 4, 2021, 2 p.m. 5.3 ppb (5) 0.6 ppb (1) 5.0 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 32.0 ppb (30) 0.14 ppb (2) 10.0 μg/m3 (10) 5.0 μg/m3 (21) 30.0
 
March 4, 2021, 1 p.m. 17.9 ppb (17) 2.1 ppb (2) 16.6 ppb (16) 16.0 ppb (16) N/A 0.0 ppb (0) 19.0 ppb (18) 0.22 ppb (3) 12.0 μg/m3 (12) 5.0 μg/m3 (21) 21.0
 
March 4, 2021, noon 30.2 ppb (29) 3.3 ppb (4) 30.0 ppb (29) 27.0 ppb (26) N/A N/A 7.0 ppb (7) 0.28 ppb (4) 11.0 μg/m3 (11) 8.0 μg/m3 (34) 34.0
 
March 4, 2021, 11 a.m. 14.5 ppb (14) 0.4 ppb (1) 13.7 ppb (13) 14.0 ppb (14) N/A N/A 19.0 ppb (18) 0.2 ppb (3) 7.0 μg/m3 (7) 12.0 μg/m3 (50) 50.0
 
March 4, 2021, 10 a.m. 17.4 ppb (17) 1.5 ppb (2) 15.3 ppb (15) 16.0 ppb (16) N/A 0.0 ppb (0) 21.0 ppb (20) N/A 9.0 μg/m3 (9) 10.0 μg/m3 (42) 42.0
 
March 4, 2021, 9 a.m. 10.9 ppb (11) 0.2 ppb (1) N/A 11.0 ppb (11) N/A 0.0 ppb (0) 25.0 ppb (24) 0.16 ppb (3) 11.0 μg/m3 (11) 11.0 μg/m3 (46) 46.0
 
March 4, 2021, 8 a.m. 14.9 ppb (15) 0.3 ppb (1) N/A 15.0 ppb (15) N/A 0.0 ppb (0) 20.0 ppb (19) 0.21 ppb (3) 12.0 μg/m3 (12) 9.0 μg/m3 (38) 38.0
 
March 4, 2021, 7 a.m. 30.0 ppb (29) 3.5 ppb (4) 28.3 ppb (27) 27.0 ppb (26) N/A 0.0 ppb (0) 9.0 ppb (9) 0.32 ppb (4) 17.0 μg/m3 (16) 14.0 μg/m3 (55) 55.0
 
March 4, 2021, 6 a.m. 21.6 ppb (21) 2.1 ppb (2) 28.6 ppb (27) 20.0 ppb (19) N/A 0.0 ppb (0) 16.0 ppb (15) 0.28 ppb (4) 9.0 μg/m3 (9) 17.0 μg/m3 (62) 62.0
 
March 4, 2021, 5 a.m. 16.6 ppb (16) 0.2 ppb (1) 24.7 ppb (24) 16.0 ppb (16) N/A 0.0 ppb (0) 20.0 ppb (19) 0.26 ppb (4) 10.0 μg/m3 (10) 15.0 μg/m3 (58) 58.0
 
March 4, 2021, 4 a.m. 10.5 ppb (10) 0.1 ppb (1) 11.9 ppb (12) 10.0 ppb (10) N/A 0.0 ppb (0) 26.0 ppb (25) 0.27 ppb (4) 17.0 μg/m3 (16) 12.0 μg/m3 (50) 50.0
 
March 4, 2021, 3 a.m. 7.6 ppb (8) 0.0 ppb (0) 8.9 ppb (9) 8.0 ppb (8) N/A 0.0 ppb (0) 31.0 ppb (29) 0.19 ppb (3) 10.0 μg/m3 (10) 10.0 μg/m3 (42) 42.0
 
March 4, 2021, 2 a.m. 10.9 ppb (11) 0.0 ppb (0) 12.1 ppb (12) 11.0 ppb (11) N/A 0.0 ppb (0) 29.0 ppb (27) 0.2 ppb (3) 18.0 μg/m3 (17) 9.0 μg/m3 (38) 38.0
 
March 4, 2021, 1 a.m. 10.0 ppb (10) 0.0 ppb (0) 12.4 ppb (12) 10.0 ppb (10) N/A 0.0 ppb (0) 32.0 ppb (30) 0.21 ppb (3) N/A N/A 30.0
 
March 4, 2021, midnight 6.2 ppb (6) 0.0 ppb (0) 7.3 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (35) 0.2 ppb (3) N/A N/A 35.0
 
March 3, 2021, 11 p.m. 5.1 ppb (5) 0.0 ppb (0) 6.2 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 40.0 ppb (38) 0.2 ppb (3) N/A N/A 38.0
 
March 3, 2021, 10 p.m. 3.3 ppb (4) 0.3 ppb (1) 3.6 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (42) 0.23 ppb (3) N/A N/A 42.0
 
March 3, 2021, 9 p.m. 15.6 ppb (15) 8.9 ppb (9) 6.4 ppb (7) 7.0 ppb (7) N/A 0.0 ppb (0) 43.0 ppb (40) 1.21 ppb (14) N/A N/A 40.0
 
March 3, 2021, 8 p.m. 2.4 ppb (3) 0.1 ppb (1) 2.9 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (41) 0.1 ppb (2) N/A N/A 41.0
 
March 3, 2021, 7 p.m. 2.6 ppb (3) 0.1 ppb (1) 2.6 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (40) 0.1 ppb (2) N/A N/A 40.0
 
March 3, 2021, 6 p.m. 3.3 ppb (4) 0.2 ppb (1) 3.3 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (38) 0.11 ppb (2) N/A N/A 38.0
 
March 3, 2021, 5 p.m. 6.4 ppb (7) 0.6 ppb (1) 4.2 ppb (4) 6.0 ppb (6) N/A 0.0 ppb (0) 38.0 ppb (36) 0.1 ppb (2) N/A N/A 36.0
 
March 3, 2021, 4 p.m. 4.8 ppb (5) 0.7 ppb (1) 4.3 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (32) 0.11 ppb (2) N/A N/A 32.0
 
March 3, 2021, 3 p.m. 6.9 ppb (7) 1.4 ppb (2) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 31.0 ppb (29) 0.12 ppb (2) N/A N/A 29.0
 
March 3, 2021, 2 p.m. 14.1 ppb (14) 3.4 ppb (4) 13.7 ppb (13) 11.0 ppb (11) N/A 0.0 ppb (0) 23.0 ppb (22) 0.17 ppb (3) N/A N/A 22.0
 
March 3, 2021, 1 p.m. 30.3 ppb (29) 9.3 ppb (9) 27.9 ppb (27) 21.0 ppb (20) N/A 0.0 ppb (0) 9.0 ppb (9) 0.25 ppb (3) N/A N/A 29.0
 
March 3, 2021, noon 26.8 ppb (26) 3.4 ppb (4) 23.5 ppb (23) 23.0 ppb (22) N/A N/A 6.0 ppb (6) 0.21 ppb (3) N/A N/A 26.0
 
March 3, 2021, 11 a.m. 18.2 ppb (18) 0.9 ppb (1) 15.2 ppb (15) 17.0 ppb (17) N/A N/A 10.0 ppb (10) 0.19 ppb (3) N/A N/A 18.0
 
March 3, 2021, 10 a.m. 13.8 ppb (14) 0.4 ppb (1) 13.0 ppb (13) 13.0 ppb (13) N/A 0.0 ppb (0) 12.0 ppb (12) N/A N/A N/A 14.0
 
March 3, 2021, 9 a.m. 13.6 ppb (13) 0.0 ppb (0) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 12.0 ppb (12) 0.17 ppb (3) N/A N/A 14.0
 
March 3, 2021, 8 a.m. 13.6 ppb (13) 0.0 ppb (0) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 13.0 ppb (13) 0.17 ppb (3) N/A N/A 14.0
 
March 3, 2021, 7 a.m. 16.2 ppb (16) 0.2 ppb (1) 16.1 ppb (16) 16.0 ppb (16) N/A 0.0 ppb (0) 13.0 ppb (13) 0.18 ppb (3) N/A N/A 16.0
 
March 3, 2021, 6 a.m. 17.5 ppb (17) 0.0 ppb (0) 17.2 ppb (17) 18.0 ppb (17) N/A 0.0 ppb (0) 13.0 ppb (13) 0.2 ppb (3) N/A N/A 17.0
 
March 3, 2021, 5 a.m. 20.2 ppb (20) 0.1 ppb (1) 15.7 ppb (15) 20.0 ppb (19) N/A 0.0 ppb (0) 12.0 ppb (12) 0.23 ppb (3) N/A N/A 20.0
 
March 3, 2021, 4 a.m. 16.8 ppb (16) 0.1 ppb (1) 15.3 ppb (15) 17.0 ppb (17) N/A 0.0 ppb (0) 17.0 ppb (16) 0.21 ppb (3) N/A N/A 17.0
 
March 3, 2021, 3 a.m. 10.8 ppb (11) -0.1 ppb (0) 11.0 ppb (11) 11.0 ppb (11) N/A 0.0 ppb (0) 25.0 ppb (24) 0.16 ppb (3) N/A N/A 24.0
 
March 3, 2021, 2 a.m. 10.1 ppb (10) -0.1 ppb (0) 10.6 ppb (10) 10.0 ppb (10) N/A 0.0 ppb (0) 28.0 ppb (26) 0.15 ppb (2) N/A N/A 26.0
 
March 3, 2021, 1 a.m. 9.5 ppb (9) 0.0 ppb (0) 9.7 ppb (10) 10.0 ppb (10) N/A 0.0 ppb (0) 30.0 ppb (28) 0.15 ppb (2) N/A N/A 28.0
 
March 3, 2021, midnight 6.9 ppb (7) -0.1 ppb (0) 7.9 ppb (8) 7.0 ppb (7) N/A 0.0 ppb (0) 33.0 ppb (31) 0.14 ppb (2) N/A N/A 31.0
 
March 2, 2021, 11 p.m. 4.4 ppb (5) 0.1 ppb (1) 5.7 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (35) 0.12 ppb (2) N/A N/A 35.0
 
March 2, 2021, 10 p.m. 4.7 ppb (5) 0.5 ppb (1) 6.2 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 38.0 ppb (36) 0.13 ppb (2) N/A N/A 36.0
 
March 2, 2021, 9 p.m. 4.5 ppb (5) 0.6 ppb (1) 5.8 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 38.0 ppb (36) 0.12 ppb (2) 16.0 μg/m3 (15) 4.0 μg/m3 (17) 36.0
 
March 2, 2021, 8 p.m. 3.9 ppb (4) 0.5 ppb (1) 5.2 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 39.0 ppb (37) 0.11 ppb (2) 15.0 μg/m3 (14) 5.0 μg/m3 (21) 37.0
 
March 2, 2021, 7 p.m. 5.3 ppb (5) 1.1 ppb (2) 6.4 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (35) 0.13 ppb (2) 15.0 μg/m3 (14) 6.0 μg/m3 (25) 35.0
 
March 2, 2021, 6 p.m. 5.8 ppb (6) 1.4 ppb (2) 7.1 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (33) 0.13 ppb (2) 16.0 μg/m3 (15) 7.0 μg/m3 (30) 33.0
 
March 2, 2021, 5 p.m. 6.7 ppb (7) 1.8 ppb (2) 7.7 ppb (8) 5.0 ppb (5) N/A 0.0 ppb (0) 34.0 ppb (32) 0.13 ppb (2) 20.0 μg/m3 (19) 8.0 μg/m3 (34) 34.0
 
March 2, 2021, 4 p.m. 7.9 ppb (8) 2.2 ppb (3) 8.4 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (30) 0.14 ppb (2) 27.0 μg/m3 (25) 7.0 μg/m3 (30) 30.0
 
March 2, 2021, 3 p.m. 8.4 ppb (8) 2.2 ppb (3) 9.2 ppb (9) 6.0 ppb (6) N/A 0.0 ppb (0) 31.0 ppb (29) 0.14 ppb (2) 28.0 μg/m3 (26) 10.0 μg/m3 (42) 42.0
 
March 2, 2021, 2 p.m. 12.0 ppb (12) 2.9 ppb (3) 12.9 ppb (13) 9.0 ppb (9) N/A 0.0 ppb (0) 28.0 ppb (26) 0.15 ppb (2) 14.0 μg/m3 (13) 7.0 μg/m3 (30) 30.0
 
March 2, 2021, 1 p.m. 12.5 ppb (12) 1.9 ppb (2) 13.1 ppb (13) 11.0 ppb (11) N/A 0.0 ppb (0) N/A 0.16 ppb (3) 13.0 μg/m3 (13) 8.0 μg/m3 (34) 34.0
 
March 2, 2021, noon 13.9 ppb (14) 1.1 ppb (2) 14.2 ppb (14) 13.0 ppb (13) N/A N/A 27.0 ppb (25) 0.16 ppb (3) 8.0 μg/m3 (8) 8.0 μg/m3 (34) 34.0
 
March 2, 2021, 11 a.m. 10.2 ppb (10) 0.3 ppb (1) 10.9 ppb (11) 10.0 ppb (10) N/A N/A 30.0 ppb (28) 0.15 ppb (2) 7.0 μg/m3 (7) 4.0 μg/m3 (17) 28.0
 
March 2, 2021, 10 a.m. 7.1 ppb (7) -0.2 ppb (0) 8.3 ppb (8) 7.0 ppb (7) N/A 0.0 ppb (0) 34.0 ppb (32) N/A 6.0 μg/m3 (6) 5.0 μg/m3 (21) 32.0
 
March 2, 2021, 9 a.m. 7.5 ppb (8) 0.0 ppb (0) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 34.0 ppb (32) 0.14 ppb (2) 9.0 μg/m3 (9) 5.0 μg/m3 (21) 32.0
 
March 2, 2021, 8 a.m. 6.6 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 35.0 ppb (33) 0.16 ppb (3) 11.0 μg/m3 (11) 3.0 μg/m3 (13) 33.0
 
March 2, 2021, 7 a.m. 8.5 ppb (9) -0.1 ppb (0) 10.1 ppb (10) 9.0 ppb (9) N/A 0.0 ppb (0) 33.0 ppb (31) 0.16 ppb (3) 7.0 μg/m3 (7) 4.0 μg/m3 (17) 31.0
 
March 2, 2021, 6 a.m. 11.1 ppb (11) -0.1 ppb (0) 13.0 ppb (13) 11.0 ppb (11) N/A 0.0 ppb (0) 32.0 ppb (30) 0.17 ppb (3) 12.0 μg/m3 (12) 8.0 μg/m3 (34) 34.0
 
March 2, 2021, 5 a.m. 13.1 ppb (13) -0.1 ppb (0) 15.1 ppb (15) 13.0 ppb (13) N/A 0.0 ppb (0) 31.0 ppb (29) 0.19 ppb (3) 14.0 μg/m3 (13) 7.0 μg/m3 (30) 30.0
 
March 2, 2021, 4 a.m. 18.8 ppb (18) 0.0 ppb (0) 21.3 ppb (21) 19.0 ppb (18) N/A 0.0 ppb (0) 25.0 ppb (24) 0.2 ppb (3) 14.0 μg/m3 (13) 8.0 μg/m3 (34) 34.0
 
March 2, 2021, 3 a.m. 12.5 ppb (12) 0.0 ppb (0) 15.0 ppb (15) 13.0 ppb (13) N/A 0.0 ppb (0) 32.0 ppb (30) 0.2 ppb (3) 11.0 μg/m3 (11) 7.0 μg/m3 (30) 30.0
 
March 2, 2021, 2 a.m. 10.8 ppb (11) 0.0 ppb (0) 13.0 ppb (13) 11.0 ppb (11) N/A 0.0 ppb (0) 33.0 ppb (31) 0.2 ppb (3) 13.0 μg/m3 (13) 7.0 μg/m3 (30) 31.0
 
March 2, 2021, 1 a.m. 8.4 ppb (8) 0.0 ppb (0) 10.4 ppb (10) 9.0 ppb (9) N/A 0.0 ppb (0) 37.0 ppb (35) 0.19 ppb (3) 12.0 μg/m3 (12) 10.0 μg/m3 (42) 42.0
 
March 2, 2021, midnight 7.9 ppb (8) -0.1 ppb (0) 9.9 ppb (10) 8.0 ppb (8) N/A 0.0 ppb (0) 38.0 ppb (36) 0.2 ppb (3) 16.0 μg/m3 (15) 7.0 μg/m3 (30) 36.0
 
March 1, 2021, 11 p.m. 7.8 ppb (8) 0.4 ppb (1) 9.5 ppb (9) 8.0 ppb (8) N/A 0.0 ppb (0) 40.0 ppb (38) 0.19 ppb (3) 15.0 μg/m3 (14) 3.0 μg/m3 (13) 38.0
 
March 1, 2021, 10 p.m. 4.2 ppb (4) 0.4 ppb (1) 5.7 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 43.0 ppb (40) 0.17 ppb (3) 9.0 μg/m3 (9) 2.0 μg/m3 (9) 40.0
 
March 1, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 3.0 μg/m3 (13) 13.0
 
March 1, 2021, 8 p.m. 2.2 ppb (3) 0.3 ppb (1) 2.9 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (41) 0.14 ppb (2) 5.0 μg/m3 (5) 3.0 μg/m3 (13) 41.0
 
March 1, 2021, 7 p.m. 2.3 ppb (3) 0.3 ppb (1) 2.9 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (41) 0.14 ppb (2) 6.0 μg/m3 (6) 4.0 μg/m3 (17) 41.0
 
March 1, 2021, 6 p.m. 2.9 ppb (3) 0.5 ppb (1) 3.5 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (39) 0.15 ppb (2) 6.0 μg/m3 (6) 4.0 μg/m3 (17) 39.0
 
March 1, 2021, 5 p.m. 3.1 ppb (3) 0.7 ppb (1) 3.5 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (38) 0.14 ppb (2) 6.0 μg/m3 (6) 3.0 μg/m3 (13) 38.0
 
March 1, 2021, 4 p.m. 3.7 ppb (4) 0.9 ppb (1) 4.0 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (36) 0.14 ppb (2) 5.0 μg/m3 (5) 5.0 μg/m3 (21) 36.0
 
March 1, 2021, 3 p.m. 2.9 ppb (3) 0.7 ppb (1) 3.3 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) 0.14 ppb (2) 5.0 μg/m3 (5) 6.0 μg/m3 (25) 34.0
 
March 1, 2021, 2 p.m. 4.7 ppb (5) 1.2 ppb (2) 5.1 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) 6.0 μg/m3 (6) 5.0 μg/m3 (21) 32.0
 
March 1, 2021, 1 p.m. 7.9 ppb (8) 0.9 ppb (1) 8.4 ppb (8) 7.0 ppb (7) N/A 0.0 ppb (0) 31.0 ppb (29) 0.21 ppb (3) 6.0 μg/m3 (6) 4.0 μg/m3 (17) 29.0
 
March 1, 2021, noon 8.8 ppb (9) 0.4 ppb (1) 9.8 ppb (10) 8.0 ppb (8) N/A 0.0 ppb (0) 30.0 ppb (28) 0.21 ppb (3) 8.0 μg/m3 (8) 3.0 μg/m3 (13) 28.0
 
March 1, 2021, 11 a.m. 5.6 ppb (6) 0.2 ppb (1) 6.1 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 34.0 ppb (32) 0.14 ppb (2) 3.0 μg/m3 (3) 7.0 μg/m3 (30) 32.0
 
March 1, 2021, 10 a.m. 3.1 ppb (3) 0.1 ppb (1) 3.9 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (34) 0.12 ppb (2) 2.0 μg/m3 (2) 11.0 μg/m3 (46) 46.0
 
March 1, 2021, 9 a.m. 1.9 ppb (2) 0.0 ppb (0) 2.7 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) 0.13 ppb (2) 3.0 μg/m3 (3) 5.0 μg/m3 (21) 34.0
 
March 1, 2021, 8 a.m. 3.4 ppb (4) 0.2 ppb (1) 4.2 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (29) 0.11 ppb (2) 3.0 μg/m3 (3) 7.0 μg/m3 (30) 30.0
 
March 1, 2021, 7 a.m. 2.9 ppb (3) 0.1 ppb (1) 3.9 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (30) 0.12 ppb (2) 4.0 μg/m3 (4) 6.0 μg/m3 (25) 30.0
 
March 1, 2021, 6 a.m. 3.4 ppb (4) 0.0 ppb (0) 4.5 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (29) 0.13 ppb (2) 6.0 μg/m3 (6) 8.0 μg/m3 (34) 34.0
 
March 1, 2021, 5 a.m. 5.5 ppb (6) 0.1 ppb (1) 6.8 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (26) 0.14 ppb (2) 6.0 μg/m3 (6) 5.0 μg/m3 (21) 26.0
 
March 1, 2021, 4 a.m. 6.2 ppb (6) 0.0 ppb (0) 7.3 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 27.0 ppb (25) 0.15 ppb (2) 10.0 μg/m3 (10) 4.0 μg/m3 (17) 25.0
 
March 1, 2021, 3 a.m. 5.6 ppb (6) 0.0 ppb (0) 6.7 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (26) 0.15 ppb (2) 8.0 μg/m3 (8) 6.0 μg/m3 (25) 26.0
 
March 1, 2021, 2 a.m. 5.8 ppb (6) 0.0 ppb (0) 6.8 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (26) 0.15 ppb (2) 7.0 μg/m3 (7) 5.0 μg/m3 (21) 26.0
 
March 1, 2021, 1 a.m. 4.3 ppb (5) 0.0 ppb (0) 5.3 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 30.0 ppb (28) 0.14 ppb (2) 4.0 μg/m3 (4) 3.0 μg/m3 (13) 28.0
 
March 1, 2021, midnight 2.7 ppb (3) 0.0 ppb (0) 3.8 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) 4.0 μg/m3 (4) 1.0 μg/m3 (5) 32.0
 
Feb. 28, 2021, 11 p.m. 2.8 ppb (3) 0.0 ppb (0) 3.8 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (36) 0.14 ppb (2) 3.0 μg/m3 (3) 3.0 μg/m3 (13) 36.0
 
Feb. 28, 2021, 10 p.m. 4.6 ppb (5) 1.4 ppb (2) 4.6 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (37) 0.14 ppb (2) 5.0 μg/m3 (5) 5.0 μg/m3 (21) 37.0
 
Feb. 28, 2021, 9 p.m. 3.3 ppb (4) 0.7 ppb (1) 3.6 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (36) 0.13 ppb (2) 4.0 μg/m3 (4) 5.0 μg/m3 (21) 36.0
 
Feb. 28, 2021, 8 p.m. 2.3 ppb (3) 0.2 ppb (1) 2.5 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (35) 0.12 ppb (2) 5.0 μg/m3 (5) 7.0 μg/m3 (30) 35.0
 
Feb. 28, 2021, 7 p.m. 3.0 ppb (3) 0.3 ppb (1) 2.4 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (32) 0.11 ppb (2) 6.0 μg/m3 (6) 6.0 μg/m3 (25) 32.0
 
Feb. 28, 2021, 6 p.m. 3.3 ppb (4) 0.6 ppb (1) 2.8 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (27) 0.12 ppb (2) 6.0 μg/m3 (6) 4.0 μg/m3 (17) 27.0
 
Feb. 28, 2021, 5 p.m. 3.2 ppb (4) 0.7 ppb (1) 2.8 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 26.0 ppb (25) 0.11 ppb (2) 4.0 μg/m3 (4) 4.0 μg/m3 (17) 25.0
 
Feb. 28, 2021, 4 p.m. 3.8 ppb (4) 0.7 ppb (1) 3.4 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (24) 0.11 ppb (2) 5.0 μg/m3 (5) 4.0 μg/m3 (17) 24.0
 
Feb. 28, 2021, 3 p.m. 2.8 ppb (3) 0.1 ppb (1) 2.6 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) 0.11 ppb (2) 3.0 μg/m3 (3) 5.0 μg/m3 (21) 26.0
 
Feb. 28, 2021, 2 p.m. 2.9 ppb (3) 0.0 ppb (0) 2.8 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 28.0 ppb (26) 0.14 ppb (2) 5.0 μg/m3 (5) 6.0 μg/m3 (25) 26.0