AQSQID: 270031002

Site Name: Blaine

Location: Blaine (Airport Rd Neast), MN

Reporting: True, Located: True

Current AQI: 16.0

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
April 1, 2020, 10 a.m. 5.2 ppb (5) 0.0 ppb (0) 5.9 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 21.0 ppb (16) 0.22 ppb (2) 4.0 μg/m3 (4) N/A 16.0
 
April 1, 2020, 9 a.m. 3.6 ppb (3) 0.0 ppb (0) 4.1 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 24.0 ppb (18) 0.22 ppb (2) 3.0 μg/m3 (3) N/A 18.0
 
April 1, 2020, 8 a.m. 2.7 ppb (3) 0.0 ppb (0) 3.2 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) N/A 3.0 μg/m3 (3) N/A 21.0
 
April 1, 2020, 7 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 28.0 ppb (22) 0.21 ppb (2) 3.0 μg/m3 (3) N/A 22.0
 
April 1, 2020, 6 a.m. 2.7 ppb (3) 0.0 ppb (0) 3.1 ppb (3) 3.0 ppb (3) N/A N/A 29.0 ppb (22) 0.21 ppb (2) 2.0 μg/m3 (2) N/A 22.0
 
April 1, 2020, 5 a.m. 3.6 ppb (3) 0.2 ppb (0) 3.8 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 29.0 ppb (22) 0.21 ppb (2) 3.0 μg/m3 (3) N/A 22.0
 
April 1, 2020, 4 a.m. 2.7 ppb (3) 0.1 ppb (0) 3.2 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 33.0 ppb (25) 0.23 ppb (3) 6.0 μg/m3 (5) N/A 25.0
 
April 1, 2020, 3 a.m. 4.9 ppb (5) 0.0 ppb (0) 4.8 ppb (4) 5.0 ppb (5) N/A 1.0 ppb (1) 34.0 ppb (26) 0.25 ppb (3) 8.0 μg/m3 (7) N/A 26.0
 
April 1, 2020, 2 a.m. 6.8 ppb (6) 0.0 ppb (0) 6.5 ppb (6) 7.0 ppb (6) N/A 1.0 ppb (1) 31.0 ppb (24) 0.29 ppb (3) 15.0 μg/m3 (14) N/A 24.0
 
April 1, 2020, 1 a.m. 4.8 ppb (4) 0.0 ppb (0) 4.8 ppb (4) 5.0 ppb (5) N/A 1.0 ppb (1) 36.0 ppb (28) 0.24 ppb (3) 8.0 μg/m3 (7) N/A 28.0
 
April 1, 2020, midnight 2.0 ppb (2) 0.0 ppb (0) 2.7 ppb (3) 2.0 ppb (2) N/A 1.0 ppb (1) 41.0 ppb (32) 0.21 ppb (2) 6.0 μg/m3 (5) N/A 32.0
 
March 31, 2020, 11 p.m. 0.8 ppb (1) 0.0 ppb (0) 1.4 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 44.0 ppb (34) 0.2 ppb (2) 6.0 μg/m3 (5) N/A 34.0
 
March 31, 2020, 10 p.m. 0.8 ppb (1) 0.0 ppb (0) 1.3 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 45.0 ppb (35) 0.18 ppb (2) 6.0 μg/m3 (5) N/A 35.0
 
March 31, 2020, 9 p.m. 1.1 ppb (1) 0.0 ppb (0) 1.4 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 45.0 ppb (35) 0.18 ppb (2) 7.0 μg/m3 (6) N/A 35.0
 
March 31, 2020, 8 p.m. 1.3 ppb (1) 0.0 ppb (0) 1.5 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 44.0 ppb (34) 0.18 ppb (2) 6.0 μg/m3 (5) N/A 34.0
 
March 31, 2020, 7 p.m. 1.6 ppb (1) 0.1 ppb (0) 1.6 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 42.0 ppb (32) 0.2 ppb (2) 7.0 μg/m3 (6) N/A 32.0
 
March 31, 2020, 6 p.m. 1.3 ppb (1) 0.1 ppb (0) 1.5 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 42.0 ppb (32) 0.18 ppb (2) 5.0 μg/m3 (5) N/A 32.0
 
March 31, 2020, 5 p.m. 1.3 ppb (1) 0.0 ppb (0) 1.3 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 41.0 ppb (32) 0.18 ppb (2) 8.0 μg/m3 (7) N/A 32.0
 
March 31, 2020, 4 p.m. 1.6 ppb (1) 0.3 ppb (0) 1.7 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) 40.0 ppb (31) 0.19 ppb (2) 16.0 μg/m3 (15) N/A 31.0
 
March 31, 2020, 3 p.m. 3.0 ppb (3) 0.5 ppb (0) 2.9 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 37.0 ppb (28) 0.2 ppb (2) 10.0 μg/m3 (9) 4.0 μg/m3 (17) 28.0
 
March 31, 2020, 2 p.m. 4.0 ppb (4) 0.7 ppb (1) 3.8 ppb (4) 3.0 ppb (3) N/A 1.0 ppb (1) 33.0 ppb (25) 0.2 ppb (2) 11.0 μg/m3 (10) 4.0 μg/m3 (17) 25.0
 
March 31, 2020, 1 p.m. 4.1 ppb (4) 0.7 ppb (1) 4.0 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (24) 0.26 ppb (3) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 24.0
 
March 31, 2020, noon 7.1 ppb (7) 0.4 ppb (0) 7.1 ppb (7) 7.0 ppb (6) N/A 0.0 ppb (0) 27.0 ppb (21) 0.21 ppb (2) 8.0 μg/m3 (7) 7.0 μg/m3 (29) 29.0
 
March 31, 2020, 11 a.m. 9.9 ppb (9) 0.3 ppb (0) 9.7 ppb (9) 10.0 ppb (9) N/A 0.0 ppb (0) 24.0 ppb (18) 0.24 ppb (3) 7.0 μg/m3 (6) 6.0 μg/m3 (25) 25.0
 
March 31, 2020, 10 a.m. 7.5 ppb (7) 0.4 ppb (0) 5.9 ppb (5) 7.0 ppb (6) N/A 0.0 ppb (0) 26.0 ppb (20) 0.22 ppb (2) 3.0 μg/m3 (3) 5.0 μg/m3 (21) 21.0
 
March 31, 2020, 9 a.m. 9.7 ppb (9) 0.6 ppb (1) 8.6 ppb (8) 9.0 ppb (8) N/A 0.0 ppb (0) 25.0 ppb (19) 0.21 ppb (2) 1.0 μg/m3 (1) 2.0 μg/m3 (8) 19.0
 
March 31, 2020, 8 a.m. 8.0 ppb (7) 0.6 ppb (1) 6.8 ppb (6) 8.0 ppb (7) N/A 0.0 ppb (0) 29.0 ppb (22) N/A 3.0 μg/m3 (3) 3.0 μg/m3 (12) 22.0
 
March 31, 2020, 7 a.m. 7.0 ppb (6) 0.2 ppb (0) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 28.0 ppb (22) 0.22 ppb (2) 6.0 μg/m3 (5) 7.0 μg/m3 (29) 29.0
 
March 31, 2020, 6 a.m. 5.4 ppb (5) 0.0 ppb (0) 6.7 ppb (6) 5.0 ppb (5) N/A N/A 31.0 ppb (24) 0.22 ppb (2) 6.0 μg/m3 (5) 7.0 μg/m3 (29) 29.0
 
March 31, 2020, 5 a.m. 4.1 ppb (4) 0.0 ppb (0) 4.3 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (26) 0.21 ppb (2) 4.0 μg/m3 (4) 6.0 μg/m3 (25) 26.0
 
March 31, 2020, 4 a.m. 4.0 ppb (4) 0.0 ppb (0) 4.4 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) 0.21 ppb (2) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 27.0
 
March 31, 2020, 3 a.m. 2.9 ppb (3) 0.1 ppb (0) 3.1 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (28) 0.23 ppb (3) 8.0 μg/m3 (7) 1.0 μg/m3 (4) 28.0
 
March 31, 2020, 2 a.m. 1.9 ppb (2) -0.1 ppb (0) 2.4 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 38.0 ppb (29) 0.2 ppb (2) 6.0 μg/m3 (5) 1.0 μg/m3 (4) 29.0
 
March 31, 2020, 1 a.m. 2.1 ppb (2) 0.0 ppb (0) 2.6 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 41.0 ppb (32) 0.22 ppb (2) 7.0 μg/m3 (6) 0.0 μg/m3 (0) 32.0
 
March 31, 2020, midnight 1.1 ppb (1) 0.0 ppb (0) 1.5 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 46.0 ppb (35) 0.21 ppb (2) 7.0 μg/m3 (6) 2.0 μg/m3 (8) 35.0
 
March 30, 2020, 11 p.m. 0.8 ppb (1) 0.0 ppb (0) 1.3 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 48.0 ppb (37) 0.21 ppb (2) 1.0 μg/m3 (1) 4.0 μg/m3 (17) 37.0
 
March 30, 2020, 10 p.m. 1.4 ppb (1) 0.1 ppb (0) 1.6 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 49.0 ppb (38) 0.19 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 38.0
 
March 30, 2020, 9 p.m. 1.6 ppb (1) 0.1 ppb (0) 1.9 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 49.0 ppb (38) 0.17 ppb (2) 3.0 μg/m3 (3) -2.0 μg/m3 (0) 38.0
 
March 30, 2020, 8 p.m. 1.3 ppb (1) 0.2 ppb (0) 1.3 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) 0.16 ppb (2) 0.0 μg/m3 (0) -1.0 μg/m3 (0) 37.0
 
March 30, 2020, 7 p.m. 1.2 ppb (1) 0.0 ppb (0) 1.5 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) 0.16 ppb (2) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 36.0
 
March 30, 2020, 6 p.m. 1.4 ppb (1) 0.0 ppb (0) 1.7 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) 0.19 ppb (2) 3.0 μg/m3 (3) 3.0 μg/m3 (12) 36.0
 
March 30, 2020, 5 p.m. 2.1 ppb (2) 0.1 ppb (0) 2.3 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) 0.16 ppb (2) 2.0 μg/m3 (2) 1.0 μg/m3 (4) 35.0
 
March 30, 2020, 4 p.m. 3.6 ppb (3) 0.4 ppb (0) 3.8 ppb (4) 3.0 ppb (3) N/A 1.0 ppb (1) 41.0 ppb (32) 0.17 ppb (2) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 32.0
 
March 30, 2020, 3 p.m. 4.6 ppb (4) 0.7 ppb (1) 4.4 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 37.0 ppb (28) 0.19 ppb (2) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 28.0
 
March 30, 2020, 2 p.m. 12.1 ppb (11) 3.6 ppb (3) 11.4 ppb (11) 9.0 ppb (8) N/A 1.0 ppb (1) 31.0 ppb (24) 0.23 ppb (3) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 24.0
 
March 30, 2020, 1 p.m. 32.3 ppb (30) 9.9 ppb (9) 30.3 ppb (28) 23.0 ppb (21) N/A 1.0 ppb (1) 14.0 ppb (11) 0.35 ppb (4) 10.0 μg/m3 (9) 4.0 μg/m3 (17) 30.0
 
March 30, 2020, noon 42.7 ppb (40) 13.6 ppb (13) 23.0 ppb (21) 29.0 ppb (27) N/A 1.0 ppb (1) 7.0 ppb (5) 0.4 ppb (4) 13.0 μg/m3 (12) 5.0 μg/m3 (21) 40.0
 
March 30, 2020, 11 a.m. 24.7 ppb (23) 2.2 ppb (2) 16.8 ppb (16) 23.0 ppb (21) N/A 0.0 ppb (0) 6.0 ppb (5) 0.34 ppb (4) 9.0 μg/m3 (8) 5.0 μg/m3 (21) 23.0
 
March 30, 2020, 10 a.m. 20.2 ppb (19) 2.4 ppb (2) 11.5 ppb (11) 18.0 ppb (17) N/A 0.0 ppb (0) 16.0 ppb (12) 0.23 ppb (3) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 19.0
 
March 30, 2020, 9 a.m. 10.1 ppb (9) 0.0 ppb (0) 10.3 ppb (10) 10.0 ppb (9) N/A 0.0 ppb (0) 26.0 ppb (20) 0.22 ppb (2) 2.0 μg/m3 (2) 4.0 μg/m3 (17) 20.0
 
March 30, 2020, 8 a.m. 7.6 ppb (7) 0.0 ppb (0) 7.2 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 28.0 ppb (22) N/A 3.0 μg/m3 (3) 5.0 μg/m3 (21) 22.0
 
March 30, 2020, 7 a.m. 5.0 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 33.0 ppb (25) 0.19 ppb (2) 1.0 μg/m3 (1) 5.0 μg/m3 (21) 25.0
 
March 30, 2020, 6 a.m. 6.1 ppb (6) 0.1 ppb (0) 5.5 ppb (5) 6.0 ppb (6) N/A N/A 31.0 ppb (24) 0.2 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 24.0
 
March 30, 2020, 5 a.m. 4.1 ppb (4) 0.1 ppb (0) 4.1 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 36.0 ppb (28) 0.18 ppb (2) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 28.0
 
March 30, 2020, 4 a.m. 2.5 ppb (2) 0.0 ppb (0) 2.8 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 39.0 ppb (30) 0.18 ppb (2) 4.0 μg/m3 (4) 2.0 μg/m3 (8) 30.0
 
March 30, 2020, 3 a.m. 1.8 ppb (2) 0.0 ppb (0) 2.4 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 40.0 ppb (31) 0.18 ppb (2) 1.0 μg/m3 (1) 1.0 μg/m3 (4) 31.0
 
March 30, 2020, 2 a.m. 4.1 ppb (4) 0.2 ppb (0) 4.2 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 38.0 ppb (29) 0.2 ppb (2) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 29.0
 
March 30, 2020, 1 a.m. 11.7 ppb (11) 0.2 ppb (0) 10.8 ppb (10) 12.0 ppb (11) N/A 1.0 ppb (1) 23.0 ppb (18) 0.3 ppb (3) 10.0 μg/m3 (9) 7.0 μg/m3 (29) 29.0
 
March 30, 2020, midnight 5.1 ppb (5) 0.0 ppb (0) 5.5 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (1) 30.0 ppb (23) 0.23 ppb (3) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 23.0
 
March 29, 2020, 11 p.m. 2.0 ppb (2) 0.0 ppb (0) 2.5 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 37.0 ppb (28) 0.19 ppb (2) 8.0 μg/m3 (7) 4.0 μg/m3 (17) 28.0
 
March 29, 2020, 10 p.m. 1.7 ppb (2) 0.1 ppb (0) 1.7 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 40.0 ppb (31) 0.19 ppb (2) 6.0 μg/m3 (5) 1.0 μg/m3 (4) 31.0
 
March 29, 2020, 9 p.m. 1.4 ppb (1) 0.0 ppb (0) 1.5 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 40.0 ppb (31) 0.18 ppb (2) 3.0 μg/m3 (3) -1.0 μg/m3 (0) 31.0
 
March 29, 2020, 8 p.m. 1.5 ppb (1) 0.1 ppb (0) 1.4 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 42.0 ppb (32) 0.18 ppb (2) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 32.0
 
March 29, 2020, 7 p.m. 1.3 ppb (1) 0.1 ppb (0) 1.2 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 43.0 ppb (33) 0.19 ppb (2) 7.0 μg/m3 (6) 5.0 μg/m3 (21) 33.0
 
March 29, 2020, 6 p.m. 1.3 ppb (1) 0.0 ppb (0) 1.2 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 42.0 ppb (32) 0.18 ppb (2) 4.0 μg/m3 (4) 4.0 μg/m3 (17) 32.0
 
March 29, 2020, 5 p.m. 1.5 ppb (1) 0.1 ppb (0) 1.3 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 42.0 ppb (32) 0.18 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 32.0
 
March 29, 2020, 4 p.m. 1.7 ppb (2) 0.2 ppb (0) 1.4 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 41.0 ppb (32) 0.18 ppb (2) 1.0 μg/m3 (1) 1.0 μg/m3 (4) 32.0
 
March 29, 2020, 3 p.m. 1.6 ppb (1) 0.0 ppb (0) 1.4 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 40.0 ppb (31) 0.18 ppb (2) 2.0 μg/m3 (2) -1.0 μg/m3 (0) 31.0
 
March 29, 2020, 2 p.m. 1.4 ppb (1) 0.0 ppb (0) 1.3 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 39.0 ppb (30) 0.18 ppb (2) 2.0 μg/m3 (2) -1.0 μg/m3 (0) 30.0
 
March 29, 2020, 1 p.m. 1.5 ppb (1) 0.2 ppb (0) 1.3 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 40.0 ppb (31) 0.17 ppb (2) 1.0 μg/m3 (1) 0.0 μg/m3 (0) 31.0
 
March 29, 2020, noon 1.5 ppb (1) 0.1 ppb (0) 1.4 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 41.0 ppb (32) 0.17 ppb (2) 1.0 μg/m3 (1) 2.0 μg/m3 (8) 32.0
 
March 29, 2020, 11 a.m. 1.2 ppb (1) 0.0 ppb (0) 1.2 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 43.0 ppb (33) 0.17 ppb (2) 1.0 μg/m3 (1) 1.0 μg/m3 (4) 33.0
 
March 29, 2020, 10 a.m. 0.9 ppb (1) 0.0 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.17 ppb (2) 0.0 μg/m3 (0) 0.0 μg/m3 (0) 2.0
 
March 29, 2020, 9 a.m. 1.1 ppb (1) 0.0 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 40.0 ppb (31) 0.15 ppb (2) 0.0 μg/m3 (0) 0.0 μg/m3 (0) 31.0
 
March 29, 2020, 8 a.m. 1.5 ppb (1) 0.2 ppb (0) 1.3 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 39.0 ppb (30) N/A -2.0 μg/m3 (0) 0.0 μg/m3 (0) 30.0
 
March 29, 2020, 7 a.m. 1.3 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 40.0 ppb (31) 0.17 ppb (2) -2.0 μg/m3 (0) -1.0 μg/m3 (0) 31.0
 
March 29, 2020, 6 a.m. 1.1 ppb (1) 0.0 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A N/A 40.0 ppb (31) 0.17 ppb (2) -1.0 μg/m3 (0) -1.0 μg/m3 (0) 31.0
 
March 29, 2020, 5 a.m. 1.3 ppb (1) 0.1 ppb (0) 1.3 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 39.0 ppb (30) 0.18 ppb (2) -3.0 μg/m3 (0) 0.0 μg/m3 (0) 30.0
 
March 29, 2020, 4 a.m. 1.4 ppb (1) 0.0 ppb (0) 1.3 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 38.0 ppb (29) 0.18 ppb (2) -3.0 μg/m3 (0) 2.0 μg/m3 (8) 29.0
 
March 29, 2020, 3 a.m. 1.5 ppb (1) 0.1 ppb (0) 1.4 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 38.0 ppb (29) 0.18 ppb (2) -2.0 μg/m3 (0) 1.0 μg/m3 (4) 29.0
 
March 29, 2020, 2 a.m. 1.3 ppb (1) 0.0 ppb (0) 1.2 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 38.0 ppb (29) 0.18 ppb (2) -2.0 μg/m3 (0) -1.0 μg/m3 (0) 29.0
 
March 29, 2020, 1 a.m. 1.2 ppb (1) 0.0 ppb (0) 1.2 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 36.0 ppb (28) 0.18 ppb (2) 0.0 μg/m3 (0) 4.0 μg/m3 (17) 28.0
 
March 29, 2020, midnight 1.3 ppb (1) 0.0 ppb (0) 1.3 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 36.0 ppb (28) 0.19 ppb (2) 3.0 μg/m3 (3) 7.0 μg/m3 (29) 29.0
 
March 28, 2020, 11 p.m. 1.5 ppb (1) 0.0 ppb (0) 1.4 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) 0.19 ppb (2) 4.0 μg/m3 (4) 4.0 μg/m3 (17) 28.0
 
March 28, 2020, 10 p.m. 1.7 ppb (2) 0.0 ppb (0) 1.7 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) 0.19 ppb (2) 4.0 μg/m3 (4) 4.0 μg/m3 (17) 28.0
 
March 28, 2020, 9 p.m. 1.4 ppb (1) 0.0 ppb (0) 1.5 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 37.0 ppb (28) 0.19 ppb (2) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 28.0
 
March 28, 2020, 8 p.m. 1.5 ppb (1) 0.0 ppb (0) 1.6 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 37.0 ppb (28) 0.2 ppb (2) 8.0 μg/m3 (7) 2.0 μg/m3 (8) 28.0
 
March 28, 2020, 7 p.m. 1.6 ppb (1) 0.0 ppb (0) 1.6 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) 0.2 ppb (2) 7.0 μg/m3 (6) 4.0 μg/m3 (17) 28.0
 
March 28, 2020, 6 p.m. 1.7 ppb (2) 0.0 ppb (0) 1.8 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) 0.21 ppb (2) 6.0 μg/m3 (5) 7.0 μg/m3 (29) 29.0
 
March 28, 2020, 5 p.m. 1.9 ppb (2) 0.0 ppb (0) 1.9 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 35.0 ppb (27) 0.21 ppb (2) 7.0 μg/m3 (6) 5.0 μg/m3 (21) 27.0
 
March 28, 2020, 4 p.m. 2.2 ppb (2) 0.1 ppb (0) 2.1 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 34.0 ppb (26) 0.21 ppb (2) 5.0 μg/m3 (5) 5.0 μg/m3 (21) 26.0
 
March 28, 2020, 3 p.m. 3.0 ppb (3) 0.3 ppb (0) 2.9 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 32.0 ppb (25) 0.3 ppb (3) 4.0 μg/m3 (4) 8.0 μg/m3 (33) 33.0
 
March 28, 2020, 2 p.m. 3.0 ppb (3) 0.5 ppb (0) 2.8 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 30.0 ppb (23) 0.23 ppb (3) 4.0 μg/m3 (4) 3.0 μg/m3 (12) 23.0
 
March 28, 2020, 1 p.m. 2.6 ppb (2) 0.2 ppb (0) 2.7 ppb (3) 2.0 ppb (2) N/A 1.0 ppb (1) 27.0 ppb (21) 0.22 ppb (2) 5.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
March 28, 2020, noon 3.0 ppb (3) 0.4 ppb (0) 2.6 ppb (2) 3.0 ppb (3) N/A 1.0 ppb (1) 26.0 ppb (20) 0.21 ppb (2) 6.0 μg/m3 (5) 6.0 μg/m3 (25) 25.0
 
March 28, 2020, 11 a.m. 2.5 ppb (2) 0.1 ppb (0) 2.2 ppb (2) 3.0 ppb (3) N/A 1.0 ppb (1) 27.0 ppb (21) 0.21 ppb (2) 7.0 μg/m3 (6) 5.0 μg/m3 (21) 21.0
 
March 28, 2020, 10 a.m. 1.9 ppb (2) 0.0 ppb (0) 1.7 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 31.0 ppb (24) 0.2 ppb (2) 6.0 μg/m3 (5) 4.0 μg/m3 (17) 24.0
 
March 28, 2020, 9 a.m. 1.7 ppb (2) 0.0 ppb (0) 1.6 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 33.0 ppb (25) 0.18 ppb (2) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 25.0
 
March 28, 2020, 8 a.m. 1.9 ppb (2) 0.0 ppb (0) 1.7 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 33.0 ppb (25) N/A 6.0 μg/m3 (5) 3.0 μg/m3 (12) 25.0
 
March 28, 2020, 7 a.m. 2.3 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 33.0 ppb (25) 0.21 ppb (2) 5.0 μg/m3 (5) 5.0 μg/m3 (21) 25.0
 
March 28, 2020, 6 a.m. 2.1 ppb (2) 0.0 ppb (0) 2.1 ppb (2) 2.0 ppb (2) N/A N/A 34.0 ppb (26) 0.21 ppb (2) 7.0 μg/m3 (6) 7.0 μg/m3 (29) 29.0
 
March 28, 2020, 5 a.m. 2.5 ppb (2) 0.0 ppb (0) 2.7 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 32.0 ppb (25) 0.23 ppb (3) 9.0 μg/m3 (8) 10.0 μg/m3 (42) 42.0
 
March 28, 2020, 4 a.m. 3.2 ppb (3) 0.0 ppb (0) 3.4 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 31.0 ppb (24) 0.24 ppb (3) 13.0 μg/m3 (12) 11.0 μg/m3 (46) 46.0
 
March 28, 2020, 3 a.m. 2.8 ppb (3) 0.0 ppb (0) 3.3 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 36.0 ppb (28) 0.23 ppb (3) 12.0 μg/m3 (11) 8.0 μg/m3 (33) 33.0
 
March 28, 2020, 2 a.m. 2.7 ppb (3) 0.0 ppb (0) 3.1 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 39.0 ppb (30) 0.22 ppb (2) 9.0 μg/m3 (8) 6.0 μg/m3 (25) 30.0
 
March 28, 2020, 1 a.m. 3.2 ppb (3) 0.0 ppb (0) 3.9 ppb (4) 3.0 ppb (3) N/A 1.0 ppb (1) 42.0 ppb (32) 0.27 ppb (3) 11.0 μg/m3 (10) 8.0 μg/m3 (33) 33.0
 
March 28, 2020, midnight 2.2 ppb (2) 0.0 ppb (0) 2.9 ppb (3) 2.0 ppb (2) N/A 1.0 ppb (1) 45.0 ppb (35) 0.19 ppb (2) 11.0 μg/m3 (10) 6.0 μg/m3 (25) 35.0
 
March 27, 2020, 11 p.m. 2.5 ppb (2) 0.0 ppb (0) 3.4 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 48.0 ppb (37) 0.2 ppb (2) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 37.0
 
March 27, 2020, 10 p.m. 3.8 ppb (4) 0.2 ppb (0) 4.6 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 47.0 ppb (36) 0.19 ppb (2) 9.0 μg/m3 (8) 7.0 μg/m3 (29) 36.0
 
March 27, 2020, 9 p.m. 4.7 ppb (4) 0.4 ppb (0) 5.3 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) 46.0 ppb (35) 0.19 ppb (2) 13.0 μg/m3 (12) 8.0 μg/m3 (33) 35.0
 
March 27, 2020, 8 p.m. 6.1 ppb (6) 0.7 ppb (1) 6.6 ppb (6) 5.0 ppb (5) N/A 1.0 ppb (1) 42.0 ppb (32) 0.2 ppb (2) 10.0 μg/m3 (9) 7.0 μg/m3 (29) 32.0
 
March 27, 2020, 7 p.m. 7.6 ppb (7) 1.3 ppb (1) 7.5 ppb (7) 6.0 ppb (6) N/A 1.0 ppb (1) 40.0 ppb (31) 0.2 ppb (2) 11.0 μg/m3 (10) 6.0 μg/m3 (25) 31.0
 
March 27, 2020, 6 p.m. 7.7 ppb (7) 1.4 ppb (1) 7.6 ppb (7) 6.0 ppb (6) N/A 1.0 ppb (1) 38.0 ppb (29) 0.2 ppb (2) 13.0 μg/m3 (12) 8.0 μg/m3 (33) 33.0
 
March 27, 2020, 5 p.m. 8.5 ppb (8) 1.6 ppb (1) 8.6 ppb (8) 7.0 ppb (6) N/A 1.0 ppb (1) 34.0 ppb (26) 0.2 ppb (2) 13.0 μg/m3 (12) 6.0 μg/m3 (25) 26.0
 
March 27, 2020, 4 p.m. 9.4 ppb (9) 2.1 ppb (2) 9.4 ppb (9) 7.0 ppb (6) N/A 1.0 ppb (1) 33.0 ppb (25) 0.22 ppb (2) 15.0 μg/m3 (14) 8.0 μg/m3 (33) 33.0
 
March 27, 2020, 3 p.m. 19.4 ppb (18) 4.7 ppb (4) 19.4 ppb (18) 15.0 ppb (14) N/A 1.0 ppb (1) 22.0 ppb (17) 0.25 ppb (3) 20.0 μg/m3 (18) 11.0 μg/m3 (46) 46.0
 
March 27, 2020, 2 p.m. 37.1 ppb (34) 14.3 ppb (13) 36.9 ppb (34) 23.0 ppb (21) N/A 1.0 ppb (1) 11.0 ppb (8) 0.33 ppb (4) 24.0 μg/m3 (22) 14.0 μg/m3 (54) 54.0
 
March 27, 2020, 1 p.m. 49.6 ppb (46) 25.7 ppb (24) 47.6 ppb (44) 24.0 ppb (22) N/A 1.0 ppb (1) 4.0 ppb (3) 0.43 ppb (5) 32.0 μg/m3 (29) 19.0 μg/m3 (65) 65.0
 
March 27, 2020, noon 34.9 ppb (32) 13.6 ppb (13) 33.7 ppb (31) 22.0 ppb (20) N/A 1.0 ppb (1) 2.0 ppb (2) 0.42 ppb (5) 24.0 μg/m3 (22) 18.0 μg/m3 (63) 63.0
 
March 27, 2020, 11 a.m. 24.1 ppb (22) 2.2 ppb (2) 24.3 ppb (23) 22.0 ppb (20) N/A 1.0 ppb (1) 2.0 ppb (2) 0.36 ppb (4) 20.0 μg/m3 (18) 16.0 μg/m3 (59) 59.0
 
March 27, 2020, 10 a.m. 19.7 ppb (18) 1.9 ppb (2) 20.0 ppb (19) 18.0 ppb (17) N/A 1.0 ppb (1) 4.0 ppb (3) 0.38 ppb (4) 22.0 μg/m3 (20) 19.0 μg/m3 (65) 65.0
 
March 27, 2020, 9 a.m. 21.1 ppb (20) 1.8 ppb (2) 21.3 ppb (20) 19.0 ppb (18) N/A 1.0 ppb (1) 4.0 ppb (3) 0.39 ppb (4) 18.0 μg/m3 (16) 18.0 μg/m3 (63) 63.0
 
March 27, 2020, 8 a.m. 29.9 ppb (28) 5.2 ppb (5) 26.9 ppb (25) 25.0 ppb (23) N/A 1.0 ppb (1) 3.0 ppb (2) N/A 20.0 μg/m3 (18) 18.0 μg/m3 (63) 63.0
 
March 27, 2020, 7 a.m. 22.1 ppb (20) 1.2 ppb (1) N/A 21.0 ppb (19) N/A 1.0 ppb (1) 6.0 ppb (5) 0.41 ppb (5) 19.0 μg/m3 (17) 18.0 μg/m3 (63) 63.0
 
March 27, 2020, 6 a.m. 25.1 ppb (23) 1.0 ppb (1) 22.1 ppb (20) 24.0 ppb (22) N/A N/A 5.0 ppb (4) 0.44 ppb (5) 16.0 μg/m3 (15) 18.0 μg/m3 (63) 63.0
 
March 27, 2020, 5 a.m. 28.1 ppb (26) 1.0 ppb (1) 28.6 ppb (26) 27.0 ppb (25) N/A 1.0 ppb (1) 5.0 ppb (4) 0.47 ppb (5) 16.0 μg/m3 (15) 13.0 μg/m3 (52) 52.0
 
March 27, 2020, 4 a.m. 22.9 ppb (21) 0.5 ppb (0) 27.1 ppb (25) 23.0 ppb (21) N/A 1.0 ppb (1) 10.0 ppb (8) 0.44 ppb (5) 16.0 μg/m3 (15) 11.0 μg/m3 (46) 46.0
 
March 27, 2020, 3 a.m. 14.2 ppb (13) 0.0 ppb (0) 13.9 ppb (13) 14.0 ppb (13) N/A 1.0 ppb (1) 20.0 ppb (15) 0.37 ppb (4) 12.0 μg/m3 (11) 9.0 μg/m3 (38) 38.0
 
March 27, 2020, 2 a.m. 9.1 ppb (8) 0.0 ppb (0) 11.1 ppb (10) 9.0 ppb (8) N/A 1.0 ppb (1) 28.0 ppb (22) 0.37 ppb (4) 12.0 μg/m3 (11) 6.0 μg/m3 (25) 25.0
 
March 27, 2020, 1 a.m. 3.6 ppb (3) 0.0 ppb (0) 4.7 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 36.0 ppb (28) 0.43 ppb (5) 7.0 μg/m3 (6) 5.0 μg/m3 (21) 28.0
 
March 27, 2020, midnight 4.3 ppb (4) 0.4 ppb (0) 3.6 ppb (3) 4.0 ppb (4) N/A 1.0 ppb (1) 39.0 ppb (30) 0.23 ppb (3) 8.0 μg/m3 (7) 3.0 μg/m3 (12) 30.0
 
March 26, 2020, 11 p.m. 1.7 ppb (2) 0.0 ppb (0) 2.3 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 43.0 ppb (33) 0.2 ppb (2) 4.0 μg/m3 (4) 4.0 μg/m3 (17) 33.0
 
March 26, 2020, 10 p.m. 1.9 ppb (2) 0.0 ppb (0) 2.2 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 43.0 ppb (33) 0.19 ppb (2) 4.0 μg/m3 (4) 5.0 μg/m3 (21) 33.0
 
March 26, 2020, 9 p.m. 2.4 ppb (2) 0.2 ppb (0) 2.6 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 42.0 ppb (32) 0.2 ppb (2) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 32.0
 
March 26, 2020, 8 p.m. 2.7 ppb (3) 0.2 ppb (0) 2.4 ppb (2) 3.0 ppb (3) N/A 1.0 ppb (1) 41.0 ppb (32) 0.2 ppb (2) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 32.0
 
March 26, 2020, 7 p.m. 3.0 ppb (3) 0.6 ppb (1) 2.4 ppb (2) 3.0 ppb (3) N/A 1.0 ppb (1) 39.0 ppb (30) 0.21 ppb (2) 6.0 μg/m3 (5) 1.0 μg/m3 (4) 30.0
 
March 26, 2020, 6 p.m. 2.5 ppb (2) 0.3 ppb (0) 2.2 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) 0.2 ppb (2) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 28.0
 
March 26, 2020, 5 p.m. 2.7 ppb (3) 0.3 ppb (0) 2.5 ppb (2) 3.0 ppb (3) N/A 1.0 ppb (1) 34.0 ppb (26) 0.19 ppb (2) 9.0 μg/m3 (8) 3.0 μg/m3 (12) 26.0
 
March 26, 2020, 4 p.m. 3.5 ppb (3) 0.7 ppb (1) 2.9 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 30.0 ppb (23) 0.2 ppb (2) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 23.0
 
March 26, 2020, 3 p.m. 6.7 ppb (6) 1.8 ppb (2) 6.0 ppb (6) 5.0 ppb (5) N/A 1.0 ppb (1) 24.0 ppb (18) 0.21 ppb (2) 5.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
March 26, 2020, 2 p.m. 6.9 ppb (6) 2.1 ppb (2) 5.9 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (1) 21.0 ppb (16) 0.2 ppb (2) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 16.0
 
March 26, 2020, 1 p.m. 17.9 ppb (17) 7.0 ppb (6) 10.2 ppb (9) 11.0 ppb (10) N/A 1.0 ppb (1) 16.0 ppb (12) 0.23 ppb (3) 3.0 μg/m3 (3) 3.0 μg/m3 (12) 17.0
 
March 26, 2020, noon 17.1 ppb (16) 5.3 ppb (5) 12.6 ppb (12) 12.0 ppb (11) N/A 1.0 ppb (1) 12.0 ppb (9) 0.25 ppb (3) 2.0 μg/m3 (2) 4.0 μg/m3 (17) 17.0
 
March 26, 2020, 11 a.m. 14.4 ppb (13) 2.4 ppb (2) 10.9 ppb (10) 12.0 ppb (11) N/A 1.0 ppb (1) 11.0 ppb (8) 0.23 ppb (3) 2.0 μg/m3 (2) 4.0 μg/m3 (17) 17.0
 
March 26, 2020, 10 a.m. 9.2 ppb (9) 0.8 ppb (1) 8.0 ppb (7) 9.0 ppb (8) N/A 1.0 ppb (1) 15.0 ppb (12) 0.2 ppb (2) 3.0 μg/m3 (3) 0.0 μg/m3 (0) 12.0
 
March 26, 2020, 9 a.m. 8.6 ppb (8) 0.6 ppb (1) 7.5 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 17.0 ppb (13) 0.18 ppb (2) 2.0 μg/m3 (2) 4.0 μg/m3 (17) 17.0
 
March 26, 2020, 8 a.m. 7.2 ppb (7) 0.5 ppb (0) 7.0 ppb (6) 7.0 ppb (6) N/A 1.0 ppb (1) 18.0 ppb (14) N/A 0.0 μg/m3 (0) 6.0 μg/m3 (25) 25.0
 
March 26, 2020, 7 a.m. 3.3 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 23.0 ppb (18) 0.18 ppb (2) -1.0 μg/m3 (0) 3.0 μg/m3 (12) 18.0
 
March 26, 2020, 6 a.m. 2.4 ppb (2) 0.2 ppb (0) 2.4 ppb (2) 2.0 ppb (2) N/A N/A 27.0 ppb (21) 0.18 ppb (2) 1.0 μg/m3 (1) 3.0 μg/m3 (12) 21.0
 
March 26, 2020, 5 a.m. 2.3 ppb (2) 0.1 ppb (0) 2.3 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 29.0 ppb (22) 0.18 ppb (2) 1.0 μg/m3 (1) 3.0 μg/m3 (12) 22.0
 
March 26, 2020, 4 a.m. 3.3 ppb (3) 0.3 ppb (0) 3.1 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 28.0 ppb (22) 0.19 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 22.0
 
March 26, 2020, 3 a.m. 4.4 ppb (4) 0.3 ppb (0) 4.3 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 25.0 ppb (19) 0.19 ppb (2) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 19.0
 
March 26, 2020, 2 a.m. 3.5 ppb (3) 0.1 ppb (0) 3.5 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 26.0 ppb (20) 0.2 ppb (2) 9.0 μg/m3 (8) 5.0 μg/m3 (21) 21.0
 
March 26, 2020, 1 a.m. 6.7 ppb (6) 0.5 ppb (0) 6.2 ppb (6) 6.0 ppb (6) N/A 1.0 ppb (1) 22.0 ppb (17) 0.23 ppb (3) 12.0 μg/m3 (11) 6.0 μg/m3 (25) 25.0
 
March 26, 2020, midnight 3.6 ppb (3) 0.2 ppb (0) 3.8 ppb (4) 3.0 ppb (3) N/A 1.0 ppb (1) 23.0 ppb (18) 0.21 ppb (2) 7.0 μg/m3 (6) 5.0 μg/m3 (21) 21.0
 
March 25, 2020, 11 p.m. 4.2 ppb (4) 0.4 ppb (0) 4.1 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 24.0 ppb (18) 0.23 ppb (3) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
March 25, 2020, 10 p.m. 3.8 ppb (4) 0.3 ppb (0) 3.8 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 27.0 ppb (21) 0.2 ppb (2) 6.0 μg/m3 (5) 4.0 μg/m3 (17) 21.0
 
March 25, 2020, 9 p.m. 4.0 ppb (4) 0.4 ppb (0) 3.9 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 28.0 ppb (22) 0.21 ppb (2) 9.0 μg/m3 (8) 4.0 μg/m3 (17) 22.0
 
March 25, 2020, 8 p.m. 4.1 ppb (4) 0.4 ppb (0) 4.0 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 28.0 ppb (22) 0.21 ppb (2) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 22.0
 
March 25, 2020, 7 p.m. 5.1 ppb (5) 0.5 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (1) 25.0 ppb (19) 0.21 ppb (2) 6.0 μg/m3 (5) 9.0 μg/m3 (38) 38.0
 
March 25, 2020, 6 p.m. 4.6 ppb (4) 0.5 ppb (0) 4.6 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 24.0 ppb (18) 0.21 ppb (2) 8.0 μg/m3 (7) 10.0 μg/m3 (42) 42.0
 
March 25, 2020, 5 p.m. 5.1 ppb (5) 0.8 ppb (1) 5.0 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) 22.0 ppb (17) 0.21 ppb (2) 7.0 μg/m3 (6) 7.0 μg/m3 (29) 29.0
 
March 25, 2020, 4 p.m. 4.8 ppb (4) 0.8 ppb (1) 5.1 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) 21.0 ppb (16) 0.21 ppb (2) 10.0 μg/m3 (9) 8.0 μg/m3 (33) 33.0
 
March 25, 2020, 3 p.m. 4.4 ppb (4) 0.8 ppb (1) 4.6 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 19.0 ppb (15) 0.21 ppb (2) 7.0 μg/m3 (6) 10.0 μg/m3 (42) 42.0
 
March 25, 2020, 2 p.m. 7.0 ppb (6) 1.5 ppb (1) 6.8 ppb (6) 6.0 ppb (6) N/A 1.0 ppb (1) 14.0 ppb (11) 0.25 ppb (3) 11.0 μg/m3 (10) 8.0 μg/m3 (33) 33.0
 
March 25, 2020, 1 p.m. 10.0 ppb (9) 1.7 ppb (2) 9.5 ppb (9) 9.0 ppb (8) N/A 1.0 ppb (1) 10.0 ppb (8) 0.25 ppb (3) 15.0 μg/m3 (14) 8.0 μg/m3 (33) 33.0
 
March 25, 2020, noon 9.9 ppb (9) 0.8 ppb (1) 9.1 ppb (8) 9.0 ppb (8) N/A 1.0 ppb (1) 11.0 ppb (8) 0.26 ppb (3) 12.0 μg/m3 (11) 14.0 μg/m3 (54) 54.0
 
March 25, 2020, 11 a.m. 10.1 ppb (9) 0.5 ppb (0) 9.2 ppb (9) 10.0 ppb (9) N/A 1.0 ppb (1) 12.0 ppb (9) 0.25 ppb (3) 11.0 μg/m3 (10) 8.0 μg/m3 (33) 33.0