ID: 642

AQSQID: 371830014

Site Name: Millbrook Ncore

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

Updated: April 11, 2021, 7:41 a.m.

Location: Raleigh (Neast Raleigh), NC

Reporting: True, Located: True

Current AQI: 38.0

Raleigh (Neast Raleigh) NC, US: 35.856111, -78.574167

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 4, 2021, 6 a.m. N/A N/A 15.1 ppb (15) N/A N/A N/A 14.0 ppb (13) 0.47 ppb (6) 21.0 μg/m3 (20) 19.0 μg/m3 (66) 66.0
 
April 4, 2021, 5 a.m. 15.4 ppb (15) 0.6 ppb (1) 18.3 ppb (18) 15.0 ppb (15) N/A 0.0 ppb (0) 17.0 ppb (16) N/A 21.0 μg/m3 (20) 14.0 μg/m3 (55) 55.0
 
April 4, 2021, 4 a.m. 15.1 ppb (15) 0.8 ppb (1) 16.2 ppb (16) 14.0 ppb (14) N/A 0.0 ppb (0) 22.0 ppb (21) 0.45 ppb (6) 26.0 μg/m3 (25) 16.0 μg/m3 (60) 60.0
 
April 4, 2021, 3 a.m. 18.9 ppb (18) 0.9 ppb (1) 19.9 ppb (19) 18.0 ppb (17) N/A 0.0 ppb (0) 21.0 ppb (20) 0.53 ppb (6) 26.0 μg/m3 (25) 16.0 μg/m3 (60) 60.0
 
April 4, 2021, 2 a.m. 21.3 ppb (21) 2.5 ppb (3) 17.1 ppb (17) 19.0 ppb (18) N/A 0.0 ppb (0) 20.0 ppb (19) 0.49 ppb (6) 22.0 μg/m3 (21) 18.0 μg/m3 (64) 64.0
 
April 4, 2021, 1 a.m. 23.9 ppb (23) 2.0 ppb (2) 22.8 ppb (22) 22.0 ppb (21) N/A 0.0 ppb (0) 20.0 ppb (19) 0.61 ppb (7) 20.0 μg/m3 (19) 10.0 μg/m3 (42) 42.0
 
April 4, 2021, midnight 18.3 ppb (18) 1.4 ppb (2) 17.7 ppb (17) 17.0 ppb (17) N/A 0.0 ppb (0) 26.0 ppb (25) 0.46 ppb (6) 14.0 μg/m3 (13) 4.0 μg/m3 (17) 25.0
 
April 3, 2021, 11 p.m. 8.1 ppb (8) 0.8 ppb (1) 7.8 ppb (8) 7.0 ppb (7) N/A 0.0 ppb (0) 42.0 ppb (39) 0.26 ppb (4) 7.0 μg/m3 (7) 3.0 μg/m3 (13) 39.0
 
April 3, 2021, 10 p.m. 2.2 ppb (3) 0.3 ppb (1) 3.3 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 49.0 ppb (46) 0.18 ppb (3) 6.0 μg/m3 (6) 3.0 μg/m3 (13) 46.0
 
April 3, 2021, 9 p.m. 1.3 ppb (2) 0.3 ppb (1) 2.3 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 51.0 ppb (48) 0.17 ppb (3) 4.0 μg/m3 (4) 3.0 μg/m3 (13) 48.0
 
April 3, 2021, 8 p.m. 1.7 ppb (2) 0.7 ppb (1) 2.7 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 51.0 ppb (48) 0.16 ppb (3) 3.0 μg/m3 (3) 4.0 μg/m3 (17) 48.0
 
April 3, 2021, 7 p.m. 1.1 ppb (2) 0.4 ppb (1) 1.9 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (47) 0.16 ppb (3) 5.0 μg/m3 (5) 1.0 μg/m3 (5) 47.0
 
April 3, 2021, 6 p.m. 0.9 ppb (1) 0.3 ppb (1) 1.6 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (44) 0.16 ppb (3) 6.0 μg/m3 (6) 0.0 μg/m3 (0) 44.0
 
April 3, 2021, 5 p.m. 0.6 ppb (1) 0.3 ppb (1) 1.2 ppb (2) 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) 0.15 ppb (2) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 43.0
 
April 3, 2021, 4 p.m. 1.0 ppb (1) 0.4 ppb (1) 1.6 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (42) 0.15 ppb (2) 4.0 μg/m3 (4) 5.0 μg/m3 (21) 42.0
 
April 3, 2021, 3 p.m. 0.8 ppb (1) 0.3 ppb (1) 1.3 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (42) 0.15 ppb (2) 5.0 μg/m3 (5) 7.0 μg/m3 (30) 42.0
 
April 3, 2021, 2 p.m. 1.5 ppb (2) 0.5 ppb (1) 2.2 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (40) 0.15 ppb (2) 5.0 μg/m3 (5) 8.0 μg/m3 (34) 40.0
 
April 3, 2021, 1 p.m. 7.7 ppb (8) 2.5 ppb (3) 7.6 ppb (8) 5.0 ppb (5) N/A 0.0 ppb (0) 35.0 ppb (33) 0.19 ppb (3) 35.0 μg/m3 (33) 14.0 μg/m3 (55) 55.0
 
April 3, 2021, noon 24.2 ppb (23) 9.2 ppb (9) 25.9 ppb (25) 15.0 ppb (15) N/A 0.0 ppb (0) 16.0 ppb (15) 0.33 ppb (4) 8.0 μg/m3 (8) 4.0 μg/m3 (17) 25.0
 
April 3, 2021, 11 a.m. 9.7 ppb (10) 1.4 ppb (2) 14.1 ppb (14) 8.0 ppb (8) N/A 0.0 ppb (0) 19.0 ppb (18) 0.22 ppb (3) 9.0 μg/m3 (9) 3.0 μg/m3 (13) 18.0
 
April 3, 2021, 10 a.m. 13.5 ppb (13) 0.9 ppb (1) 15.1 ppb (15) 13.0 ppb (13) N/A 0.0 ppb (0) 18.0 ppb (17) 0.41 ppb (5) 11.0 μg/m3 (11) 4.0 μg/m3 (17) 17.0
 
April 3, 2021, 9 a.m. 8.9 ppb (9) 0.4 ppb (1) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 20.0 ppb (19) 0.2 ppb (3) 7.0 μg/m3 (7) 2.0 μg/m3 (9) 19.0
 
April 3, 2021, 8 a.m. 6.1 ppb (6) 0.2 ppb (1) 7.4 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) N/A 0.19 ppb (3) 7.0 μg/m3 (7) 4.0 μg/m3 (17) 17.0
 
April 3, 2021, 7 a.m. 5.5 ppb (6) 0.4 ppb (1) 7.4 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 28.0 ppb (26) 0.19 ppb (3) 8.0 μg/m3 (8) 7.0 μg/m3 (30) 30.0
 
April 3, 2021, 6 a.m. N/A N/A 6.2 ppb (6) N/A N/A N/A 27.0 ppb (25) 0.21 ppb (3) 11.0 μg/m3 (11) 6.0 μg/m3 (25) 25.0
 
April 3, 2021, 5 a.m. 5.1 ppb (5) 0.5 ppb (1) 4.7 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 32.0 ppb (30) N/A 7.0 μg/m3 (7) 4.0 μg/m3 (17) 30.0
 
April 3, 2021, 4 a.m. 3.5 ppb (4) 0.2 ppb (1) 4.1 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (33) 0.17 ppb (3) 10.0 μg/m3 (10) 6.0 μg/m3 (25) 33.0
 
April 3, 2021, 3 a.m. 3.1 ppb (3) 0.3 ppb (1) 3.4 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (35) 0.17 ppb (3) 11.0 μg/m3 (11) 7.0 μg/m3 (30) 35.0
 
April 3, 2021, 2 a.m. 5.0 ppb (5) 0.2 ppb (1) 5.4 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 36.0 ppb (34) 0.2 ppb (3) 9.0 μg/m3 (9) 5.0 μg/m3 (21) 34.0
 
April 3, 2021, 1 a.m. 5.4 ppb (6) 0.1 ppb (1) 6.6 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 35.0 ppb (33) 0.2 ppb (3) 7.0 μg/m3 (7) 5.0 μg/m3 (21) 33.0
 
April 3, 2021, midnight 3.2 ppb (4) 0.0 ppb (0) 3.9 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (38) 0.17 ppb (3) 9.0 μg/m3 (9) 5.0 μg/m3 (21) 38.0
 
April 2, 2021, 11 p.m. 2.0 ppb (2) 0.0 ppb (0) 2.7 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (41) 0.15 ppb (2) 6.0 μg/m3 (6) 1.0 μg/m3 (5) 41.0
 
April 2, 2021, 10 p.m. 1.0 ppb (1) 0.1 ppb (1) 1.6 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (43) 0.14 ppb (2) 5.0 μg/m3 (5) 1.0 μg/m3 (5) 43.0
 
April 2, 2021, 9 p.m. 1.0 ppb (1) 0.2 ppb (1) 1.6 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (44) 0.13 ppb (2) 3.0 μg/m3 (3) 1.0 μg/m3 (5) 44.0
 
April 2, 2021, 8 p.m. 0.7 ppb (1) 0.3 ppb (1) 1.2 ppb (2) 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (44) 0.13 ppb (2) 2.0 μg/m3 (2) 1.0 μg/m3 (5) 44.0
 
April 2, 2021, 7 p.m. 0.5 ppb (1) 0.1 ppb (1) 1.1 ppb (2) 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (43) 0.13 ppb (2) 2.0 μg/m3 (2) 2.0 μg/m3 (9) 43.0
 
April 2, 2021, 6 p.m. 0.6 ppb (1) 0.2 ppb (1) 1.1 ppb (2) 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (42) 0.14 ppb (2) 2.0 μg/m3 (2) 3.0 μg/m3 (13) 42.0
 
April 2, 2021, 5 p.m. 0.7 ppb (1) 0.3 ppb (1) 1.1 ppb (2) 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (41) 0.13 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (9) 41.0
 
April 2, 2021, 4 p.m. 0.9 ppb (1) 0.4 ppb (1) 1.3 ppb (2) 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (39) 0.13 ppb (2) 4.0 μg/m3 (4) 3.0 μg/m3 (13) 39.0
 
April 2, 2021, 3 p.m. 1.1 ppb (2) 0.5 ppb (1) 1.5 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (38) 0.14 ppb (2) 5.0 μg/m3 (5) 3.0 μg/m3 (13) 38.0
 
April 2, 2021, 2 p.m. 1.2 ppb (2) 0.5 ppb (1) 1.7 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (37) 0.14 ppb (2) 5.0 μg/m3 (5) 0.0 μg/m3 (0) 37.0
 
April 2, 2021, 1 p.m. 1.8 ppb (2) 0.6 ppb (1) 2.0 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) 0.14 ppb (2) 6.0 μg/m3 (6) 2.0 μg/m3 (9) 35.0
 
April 2, 2021, noon 4.3 ppb (5) 1.1 ppb (2) 4.5 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (29) 0.15 ppb (2) 7.0 μg/m3 (7) 5.0 μg/m3 (21) 29.0
 
April 2, 2021, 11 a.m. 4.5 ppb (5) 0.3 ppb (1) 5.0 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 29.0 ppb (27) 0.15 ppb (2) 9.0 μg/m3 (9) 3.0 μg/m3 (13) 27.0
 
April 2, 2021, 10 a.m. 2.7 ppb (3) 0.0 ppb (0) 3.4 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (28) 0.14 ppb (2) 7.0 μg/m3 (7) -1.0 μg/m3 (0) 28.0
 
April 2, 2021, 9 a.m. 1.6 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (30) 0.14 ppb (2) 6.0 μg/m3 (6) 1.0 μg/m3 (5) 30.0
 
April 2, 2021, 8 a.m. 1.4 ppb (2) 0.1 ppb (1) 1.8 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) N/A 0.13 ppb (2) 8.0 μg/m3 (8) 2.0 μg/m3 (9) 9.0
 
April 2, 2021, 7 a.m. 1.1 ppb (2) 0.2 ppb (1) 1.4 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) 0.13 ppb (2) 10.0 μg/m3 (10) 2.0 μg/m3 (9) 33.0
 
April 2, 2021, 6 a.m. N/A N/A 1.2 ppb (2) N/A N/A N/A 36.0 ppb (34) 0.13 ppb (2) 10.0 μg/m3 (10) 2.0 μg/m3 (9) 34.0
 
April 2, 2021, 5 a.m. 0.8 ppb (1) 0.0 ppb (0) 1.2 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) N/A 9.0 μg/m3 (9) 2.0 μg/m3 (9) 35.0
 
April 2, 2021, 4 a.m. 0.9 ppb (1) 0.0 ppb (0) 1.4 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) 0.14 ppb (2) 7.0 μg/m3 (7) 2.0 μg/m3 (9) 35.0
 
April 2, 2021, 3 a.m. 1.0 ppb (1) 0.0 ppb (0) 1.6 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) 0.14 ppb (2) 8.0 μg/m3 (8) 4.0 μg/m3 (17) 35.0
 
April 2, 2021, 2 a.m. 1.1 ppb (2) 0.0 ppb (0) 1.7 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) 0.14 ppb (2) 16.0 μg/m3 (15) 7.0 μg/m3 (30) 36.0
 
April 2, 2021, 1 a.m. 1.3 ppb (2) 0.0 ppb (0) 1.9 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) 0.14 ppb (2) 12.0 μg/m3 (12) 5.0 μg/m3 (21) 36.0
 
April 2, 2021, midnight 1.5 ppb (2) 0.1 ppb (1) 2.1 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (37) 0.14 ppb (2) 10.0 μg/m3 (10) 4.0 μg/m3 (17) 37.0
 
April 1, 2021, 11 p.m. 3.1 ppb (3) 0.3 ppb (1) 4.0 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (38) 0.14 ppb (2) 19.0 μg/m3 (18) 6.0 μg/m3 (25) 38.0
 
April 1, 2021, 10 p.m. 2.3 ppb (3) 0.3 ppb (1) 3.1 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (39) 0.15 ppb (2) 13.0 μg/m3 (13) 8.0 μg/m3 (34) 39.0
 
April 1, 2021, 9 p.m. 2.4 ppb (3) 0.6 ppb (1) 3.5 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (39) 0.15 ppb (2) 16.0 μg/m3 (15) 10.0 μg/m3 (42) 42.0
 
April 1, 2021, 8 p.m. 1.6 ppb (2) 0.3 ppb (1) 2.7 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (41) 0.14 ppb (2) 12.0 μg/m3 (12) 8.0 μg/m3 (34) 41.0
 
April 1, 2021, 7 p.m. 1.2 ppb (2) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (41) 0.14 ppb (2) 17.0 μg/m3 (16) 6.0 μg/m3 (25) 41.0
 
April 1, 2021, 6 p.m. 1.0 ppb (1) 0.3 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (42) 0.14 ppb (2) 12.0 μg/m3 (12) 7.0 μg/m3 (30) 42.0
 
April 1, 2021, 5 p.m. 1.8 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (42) 0.15 ppb (2) 16.0 μg/m3 (15) 4.0 μg/m3 (17) 42.0
 
April 1, 2021, 4 p.m. N/A N/A 2.1 ppb (2) N/A N/A 0.0 ppb (0) 46.0 ppb (43) 0.14 ppb (2) 10.0 μg/m3 (10) 3.0 μg/m3 (13) 43.0
 
April 1, 2021, 3 p.m. N/A N/A 2.2 ppb (3) N/A N/A 0.0 ppb (0) 45.0 ppb (42) 0.14 ppb (2) 10.0 μg/m3 (10) 5.0 μg/m3 (21) 42.0
 
April 1, 2021, 2 p.m. N/A N/A 3.2 ppb (4) N/A N/A 0.0 ppb (0) 41.0 ppb (38) N/A 14.0 μg/m3 (13) 3.0 μg/m3 (13) 38.0
 
April 1, 2021, 1 p.m. 2.2 ppb (3) 0.4 ppb (1) 3.0 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (37) 0.14 ppb (2) 8.0 μg/m3 (8) 3.0 μg/m3 (13) 37.0
 
April 1, 2021, noon 2.8 ppb (3) 0.2 ppb (1) 3.4 ppb (4) 3.0 ppb (3) N/A 1.0 ppb (2) 35.0 ppb (33) 0.16 ppb (3) 7.0 μg/m3 (7) 3.0 μg/m3 (13) 33.0
 
April 1, 2021, 11 a.m. 2.0 ppb (2) 0.0 ppb (0) 2.8 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) 0.15 ppb (2) 7.0 μg/m3 (7) 2.0 μg/m3 (9) 34.0
 
April 1, 2021, 10 a.m. 1.3 ppb (2) -0.1 ppb (0) 2.1 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) 0.15 ppb (2) 6.0 μg/m3 (6) 4.0 μg/m3 (17) 35.0
 
April 1, 2021, 9 a.m. 0.7 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) 0.14 ppb (2) 4.0 μg/m3 (4) 3.0 μg/m3 (13) 34.0
 
April 1, 2021, 8 a.m. 0.5 ppb (1) -0.2 ppb (0) 1.3 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) N/A 0.15 ppb (2) 5.0 μg/m3 (5) 1.0 μg/m3 (5) 5.0
 
April 1, 2021, 7 a.m. 0.8 ppb (1) 0.2 ppb (1) 1.1 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) 0.16 ppb (3) 7.0 μg/m3 (7) 2.0 μg/m3 (9) 34.0
 
April 1, 2021, 6 a.m. N/A N/A 1.7 ppb (2) N/A N/A N/A 27.0 ppb (25) 0.16 ppb (3) 9.0 μg/m3 (9) 3.0 μg/m3 (13) 25.0
 
April 1, 2021, 5 a.m. 4.1 ppb (4) 0.0 ppb (0) 4.6 ppb (5) 4.0 ppb (4) N/A 0.0 ppb (0) 15.0 ppb (14) N/A 8.0 μg/m3 (8) 4.0 μg/m3 (17) 17.0
 
April 1, 2021, 4 a.m. 6.6 ppb (7) 0.1 ppb (1) 7.3 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 13.0 ppb (13) 0.25 ppb (3) 9.0 μg/m3 (9) 2.0 μg/m3 (9) 13.0
 
April 1, 2021, 3 a.m. 7.9 ppb (8) 0.6 ppb (1) 8.1 ppb (8) 7.0 ppb (7) N/A 0.0 ppb (0) 15.0 ppb (14) 0.27 ppb (4) 8.0 μg/m3 (8) 5.0 μg/m3 (21) 21.0
 
April 1, 2021, 2 a.m. 10.7 ppb (11) 0.3 ppb (1) 11.4 ppb (11) 10.0 ppb (10) N/A 0.0 ppb (0) 13.0 ppb (13) 0.33 ppb (4) 6.0 μg/m3 (6) 5.0 μg/m3 (21) 21.0
 
April 1, 2021, 1 a.m. 10.5 ppb (10) 0.4 ppb (1) 11.1 ppb (11) 10.0 ppb (10) N/A 0.0 ppb (0) 15.0 ppb (14) 0.37 ppb (5) 4.0 μg/m3 (4) 4.0 μg/m3 (17) 17.0
 
April 1, 2021, midnight 12.6 ppb (12) 1.7 ppb (2) 12.7 ppb (12) 11.0 ppb (11) N/A 0.0 ppb (0) 18.0 ppb (17) 0.34 ppb (4) 3.0 μg/m3 (3) 1.0 μg/m3 (5) 17.0
 
March 31, 2021, 11 p.m. 6.9 ppb (7) 0.6 ppb (1) 8.2 ppb (8) 6.0 ppb (6) N/A 0.0 ppb (0) 26.0 ppb (25) 0.27 ppb (4) 7.0 μg/m3 (7) 1.0 μg/m3 (5) 25.0
 
March 31, 2021, 10 p.m. 4.9 ppb (5) 0.8 ppb (1) 5.6 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (30) 0.22 ppb (3) 12.0 μg/m3 (12) 4.0 μg/m3 (17) 30.0
 
March 31, 2021, 9 p.m. 1.3 ppb (2) -0.1 ppb (0) 2.5 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) 0.17 ppb (3) 20.0 μg/m3 (19) 8.0 μg/m3 (34) 34.0
 
March 31, 2021, 8 p.m. 2.7 ppb (3) 0.8 ppb (1) 3.7 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (30) 0.19 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 31, 2021, 7 p.m. 4.8 ppb (5) 1.4 ppb (2) 5.6 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (27) 0.22 ppb (3) N/A N/A 27.0
 
March 31, 2021, 6 p.m. 4.7 ppb (5) 1.4 ppb (2) 5.6 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (27) 0.2 ppb (3) N/A N/A 27.0
 
March 31, 2021, 5 p.m. 2.3 ppb (3) 0.7 ppb (1) 3.7 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) 0.19 ppb (3) 29.0 μg/m3 (27) 7.0 μg/m3 (30) 31.0
 
March 31, 2021, 4 p.m. 2.5 ppb (3) 0.6 ppb (1) 4.0 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) 0.18 ppb (3) 33.0 μg/m3 (31) 8.0 μg/m3 (34) 34.0
 
March 31, 2021, 3 p.m. 2.5 ppb (3) 0.8 ppb (1) 3.8 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) 0.18 ppb (3) 44.0 μg/m3 (41) 10.0 μg/m3 (42) 42.0
 
March 31, 2021, 2 p.m. 3.1 ppb (3) 1.0 ppb (1) 4.9 ppb (5) 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) 0.2 ppb (3) 32.0 μg/m3 (30) 7.0 μg/m3 (30) 32.0
 
March 31, 2021, 1 p.m. 5.6 ppb (6) 1.3 ppb (2) 6.6 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (29) 0.21 ppb (3) 16.0 μg/m3 (15) 7.0 μg/m3 (30) 30.0
 
March 31, 2021, noon 8.1 ppb (8) 2.0 ppb (2) 8.9 ppb (9) 6.0 ppb (6) N/A 0.0 ppb (0) 25.0 ppb (24) 0.24 ppb (3) 12.0 μg/m3 (12) 5.0 μg/m3 (21) 24.0
 
March 31, 2021, 11 a.m. 9.5 ppb (9) 2.0 ppb (2) 8.6 ppb (9) 7.0 ppb (7) N/A 0.0 ppb (0) 19.0 ppb (18) 0.27 ppb (4) 11.0 μg/m3 (11) 3.0 μg/m3 (13) 18.0
 
March 31, 2021, 10 a.m. 8.3 ppb (8) 1.7 ppb (2) 6.4 ppb (7) 7.0 ppb (7) N/A 0.0 ppb (0) 21.0 ppb (20) 0.25 ppb (3) 11.0 μg/m3 (11) 4.0 μg/m3 (17) 20.0
 
March 31, 2021, 9 a.m. 4.8 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 27.0 ppb (25) 0.18 ppb (3) 12.0 μg/m3 (12) 5.0 μg/m3 (21) 25.0
 
March 31, 2021, 8 a.m. 2.5 ppb (3) 0.1 ppb (1) 3.4 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.17 ppb (3) 11.0 μg/m3 (11) 7.0 μg/m3 (30) 30.0
 
March 31, 2021, 7 a.m. 3.3 ppb (4) 0.8 ppb (1) 3.4 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (31) 0.17 ppb (3) 12.0 μg/m3 (12) 8.0 μg/m3 (34) 34.0
 
March 31, 2021, 6 a.m. N/A N/A 2.7 ppb (3) N/A N/A N/A 37.0 ppb (35) 0.16 ppb (3) 13.0 μg/m3 (13) 4.0 μg/m3 (17) 35.0
 
March 31, 2021, 5 a.m. 1.6 ppb (2) 0.0 ppb (0) 2.6 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (36) N/A 12.0 μg/m3 (12) 3.0 μg/m3 (13) 36.0
 
March 31, 2021, 4 a.m. 1.7 ppb (2) 0.0 ppb (0) 2.6 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (38) 0.16 ppb (3) 15.0 μg/m3 (14) 4.0 μg/m3 (17) 38.0
 
March 31, 2021, 3 a.m. 1.5 ppb (2) 0.0 ppb (0) 2.7 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (38) 0.16 ppb (3) 18.0 μg/m3 (17) 6.0 μg/m3 (25) 38.0
 
March 31, 2021, 2 a.m. 1.6 ppb (2) 0.1 ppb (1) 3.3 ppb (4) 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (40) 0.17 ppb (3) 28.0 μg/m3 (26) 8.0 μg/m3 (34) 40.0
 
March 31, 2021, 1 a.m. 4.3 ppb (5) 0.4 ppb (1) 5.5 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 41.0 ppb (38) 0.23 ppb (3) 21.0 μg/m3 (20) 7.0 μg/m3 (30) 38.0
 
March 31, 2021, midnight 9.1 ppb (9) 0.7 ppb (1) 8.8 ppb (9) 8.0 ppb (8) N/A 0.0 ppb (0) 38.0 ppb (36) 0.32 ppb (4) 19.0 μg/m3 (18) 8.0 μg/m3 (34) 36.0
 
March 30, 2021, 11 p.m. 5.3 ppb (5) 0.8 ppb (1) 6.1 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 45.0 ppb (42) 0.25 ppb (3) 18.0 μg/m3 (17) 10.0 μg/m3 (42) 42.0
 
March 30, 2021, 10 p.m. 3.7 ppb (4) 0.8 ppb (1) 5.5 ppb (6) 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (46) 0.21 ppb (3) 18.0 μg/m3 (17) 13.0 μg/m3 (53) 53.0
 
March 30, 2021, 9 p.m. 2.5 ppb (3) 0.7 ppb (1) 4.8 ppb (5) 2.0 ppb (2) N/A 0.0 ppb (0) 52.0 ppb (49) 0.19 ppb (3) 20.0 μg/m3 (19) 6.0 μg/m3 (25) 49.0
 
March 30, 2021, 8 p.m. 2.3 ppb (3) 0.5 ppb (1) 4.2 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 54.0 ppb (50) 0.18 ppb (3) 11.0 μg/m3 (11) 2.0 μg/m3 (9) 50.0
 
March 30, 2021, 7 p.m. N/A N/A 3.7 ppb (4) N/A N/A 0.0 ppb (0) 54.0 ppb (50) 0.17 ppb (3) N/A N/A 50.0
 
March 30, 2021, 6 p.m. 1.8 ppb (2) 0.6 ppb (1) 3.6 ppb (4) 1.0 ppb (1) N/A 0.0 ppb (0) 51.0 ppb (48) 0.17 ppb (3) 13.0 μg/m3 (13) 4.0 μg/m3 (17) 48.0
 
March 30, 2021, 5 p.m. 2.0 ppb (2) 0.7 ppb (1) 3.7 ppb (4) 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (47) 0.18 ppb (3) 14.0 μg/m3 (13) 3.0 μg/m3 (13) 47.0
 
March 30, 2021, 4 p.m. 1.9 ppb (2) 0.7 ppb (1) 3.8 ppb (4) 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (45) 0.17 ppb (3) 7.0 μg/m3 (7) 5.0 μg/m3 (21) 45.0
 
March 30, 2021, 3 p.m. 2.4 ppb (3) 1.0 ppb (1) 3.1 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (40) 0.16 ppb (3) 11.0 μg/m3 (11) 8.0 μg/m3 (34) 40.0
 
March 30, 2021, 2 p.m. 6.1 ppb (6) 2.3 ppb (3) 7.3 ppb (7) 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (32) 0.22 ppb (3) 8.0 μg/m3 (8) 11.0 μg/m3 (46) 46.0
 
March 30, 2021, 1 p.m. 14.1 ppb (14) 6.0 ppb (6) 14.1 ppb (14) 8.0 ppb (8) N/A 0.0 ppb (0) 24.0 ppb (23) 0.29 ppb (4) 26.0 μg/m3 (25) 17.0 μg/m3 (62) 62.0
 
March 30, 2021, noon 46.5 ppb (44) 33.5 ppb (32) 46.3 ppb (44) 13.0 ppb (13) N/A 0.0 ppb (0) N/A 0.59 ppb (7) 49.0 μg/m3 (46) 16.0 μg/m3 (60) 60.0
 
March 30, 2021, 11 a.m. 37.6 ppb (36) 25.0 ppb (24) 41.2 ppb (39) 13.0 ppb (13) N/A 0.0 ppb (0) 2.0 ppb (2) 0.53 ppb (6) 67.0 μg/m3 (57) 24.0 μg/m3 (77) 77.0
 
March 30, 2021, 10 a.m. 37.7 ppb (36) 23.5 ppb (23) 42.6 ppb (41) 14.0 ppb (14) N/A 0.0 ppb (0) 0.0 ppb (0) 0.45 ppb (6) 14.0 μg/m3 (13) 12.0 μg/m3 (50) 50.0
 
March 30, 2021, 9 a.m. 15.2 ppb (15) 3.3 ppb (4) N/A 12.0 ppb (12) N/A 0.0 ppb (0) 6.0 ppb (6) 0.3 ppb (4) 14.0 μg/m3 (13) 13.0 μg/m3 (53) 53.0
 
March 30, 2021, 8 a.m. 7.6 ppb (8) 0.6 ppb (1) 9.9 ppb (10) 7.0 ppb (7) N/A 0.0 ppb (0) N/A 0.28 ppb (4) 16.0 μg/m3 (15) 13.0 μg/m3 (53) 53.0
 
March 30, 2021, 7 a.m. 9.8 ppb (10) 1.2 ppb (2) 7.1 ppb (7) 9.0 ppb (9) N/A 0.0 ppb (0) 16.0 ppb (15) 0.28 ppb (4) 16.0 μg/m3 (15) 9.0 μg/m3 (38) 38.0
 
March 30, 2021, 6 a.m. N/A N/A 8.9 ppb (9) N/A N/A N/A 11.0 ppb (11) 0.34 ppb (4) 25.0 μg/m3 (24) 19.0 μg/m3 (66) 66.0
 
March 30, 2021, 5 a.m. 21.8 ppb (21) 3.4 ppb (4) 17.5 ppb (17) 18.0 ppb (17) N/A 0.0 ppb (0) 4.0 ppb (4) N/A 65.0 μg/m3 (56) 55.0 μg/m3 (150) 150.0
 
March 30, 2021, 4 a.m. 23.4 ppb (23) 2.5 ppb (3) 28.1 ppb (27) 21.0 ppb (20) N/A 0.0 ppb (0) 8.0 ppb (8) 0.68 ppb (8) 22.0 μg/m3 (21) 14.0 μg/m3 (55) 55.0
 
March 30, 2021, 3 a.m. 17.5 ppb (17) 0.4 ppb (1) 20.7 ppb (20) 17.0 ppb (17) N/A 0.0 ppb (0) 16.0 ppb (15) 0.47 ppb (6) 16.0 μg/m3 (15) 5.0 μg/m3 (21) 21.0
 
March 30, 2021, 2 a.m. 18.2 ppb (18) 0.4 ppb (1) 19.9 ppb (19) 18.0 ppb (17) N/A 0.0 ppb (0) 16.0 ppb (15) 0.38 ppb (5) 25.0 μg/m3 (24) 18.0 μg/m3 (64) 64.0
 
March 30, 2021, 1 a.m. 14.2 ppb (14) 0.3 ppb (1) 19.8 ppb (19) 14.0 ppb (14) N/A 0.0 ppb (0) 27.0 ppb (25) 0.38 ppb (5) 11.0 μg/m3 (11) 6.0 μg/m3 (25) 25.0
 
March 30, 2021, midnight 20.5 ppb (20) 1.6 ppb (2) 19.0 ppb (18) 19.0 ppb (18) N/A 0.0 ppb (0) 23.0 ppb (22) 0.43 ppb (5) 8.0 μg/m3 (8) 3.0 μg/m3 (13) 22.0
 
March 29, 2021, 11 p.m. 9.8 ppb (10) 0.9 ppb (1) 10.0 ppb (10) 9.0 ppb (9) N/A 0.0 ppb (0) 39.0 ppb (37) 0.26 ppb (4) 7.0 μg/m3 (7) 3.0 μg/m3 (13) 37.0
 
March 29, 2021, 10 p.m. 1.1 ppb (2) 0.1 ppb (1) 1.9 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (47) 0.13 ppb (2) 8.0 μg/m3 (8) 3.0 μg/m3 (13) 47.0
 
March 29, 2021, 9 p.m. 1.0 ppb (1) 0.2 ppb (1) 1.9 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (47) 0.15 ppb (2) 3.0 μg/m3 (3) 0.0 μg/m3 (0) 47.0
 
March 29, 2021, 8 p.m. 0.8 ppb (1) 0.1 ppb (1) 1.7 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (47) 0.13 ppb (2) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 47.0
 
March 29, 2021, 7 p.m. 1.1 ppb (2) 0.3 ppb (1) 1.8 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (45) 0.12 ppb (2) 3.0 μg/m3 (3) 0.0 μg/m3 (0) 45.0
 
March 29, 2021, 6 p.m. 0.8 ppb (1) 0.3 ppb (1) 1.3 ppb (2) 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (44) 0.12 ppb (2) 6.0 μg/m3 (6) 0.0 μg/m3 (0) 44.0
 
March 29, 2021, 5 p.m. 1.0 ppb (1) 0.4 ppb (1) 1.5 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (42) 0.13 ppb (2) 6.0 μg/m3 (6) 2.0 μg/m3 (9) 42.0
 
March 29, 2021, 4 p.m. 0.8 ppb (1) 0.3 ppb (1) 1.3 ppb (2) 0.0 ppb (0) N/A 0.0 ppb (0) 44.0 ppb (41) 0.13 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (9) 41.0
 
March 29, 2021, 3 p.m. 1.0 ppb (1) 0.4 ppb (1) 1.4 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (38) 0.13 ppb (2) 2.0 μg/m3 (2) 5.0 μg/m3 (21) 38.0
 
March 29, 2021, 2 p.m. 0.9 ppb (1) 0.3 ppb (1) 1.3 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (38) 0.13 ppb (2) 3.0 μg/m3 (3) 6.0 μg/m3 (25) 38.0
 
March 29, 2021, 1 p.m. 1.3 ppb (2) 0.4 ppb (1) 1.6 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) 0.13 ppb (2) 5.0 μg/m3 (5) 6.0 μg/m3 (25) 36.0
 
March 29, 2021, noon 2.1 ppb (2) 0.3 ppb (1) 2.5 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (34) 0.13 ppb (2) 6.0 μg/m3 (6) 5.0 μg/m3 (21) 34.0
 
March 29, 2021, 11 a.m. 2.3 ppb (3) 0.1 ppb (1) 2.7 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (33) 0.14 ppb (2) 5.0 μg/m3 (5) 5.0 μg/m3 (21) 33.0
 
March 29, 2021, 10 a.m. 0.9 ppb (1) 0.0 ppb (0) 1.3 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) 0.13 ppb (2) 5.0 μg/m3 (5) 1.0 μg/m3 (5) 35.0
 
March 29, 2021, 9 a.m. 0.5 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 37.0 ppb (35) 0.12 ppb (2) 7.0 μg/m3 (7) 2.0 μg/m3 (9) 35.0
 
March 29, 2021, 8 a.m. 0.3 ppb (1) 0.0 ppb (0) 0.5 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.12 ppb (2) 5.0 μg/m3 (5) 3.0 μg/m3 (13) 13.0
 
March 29, 2021, 7 a.m. 0.5 ppb (1) 0.2 ppb (1) 0.5 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) 39.0 ppb (37) 0.11 ppb (2) 3.0 μg/m3 (3) 4.0 μg/m3 (17) 37.0
 
March 29, 2021, 6 a.m. N/A N/A 0.6 ppb (1) N/A N/A N/A 40.0 ppb (38) 0.11 ppb (2) 5.0 μg/m3 (5) 3.0 μg/m3 (13) 38.0
 
March 29, 2021, 5 a.m. 0.1 ppb (1) -0.1 ppb (0) 0.6 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) 40.0 ppb (38) N/A 8.0 μg/m3 (8) 6.0 μg/m3 (25) 38.0
 
March 29, 2021, 4 a.m. 0.1 ppb (1) -0.1 ppb (0) 0.6 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (38) 0.12 ppb (2) 10.0 μg/m3 (10) 6.0 μg/m3 (25) 38.0
 
March 29, 2021, 3 a.m. 0.1 ppb (1) -0.3 ppb (0) 0.7 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (38) 0.12 ppb (2) 10.0 μg/m3 (10) 5.0 μg/m3 (21) 38.0
 
March 29, 2021, 2 a.m. 0.5 ppb (1) -0.1 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (36) 0.14 ppb (2) 13.0 μg/m3 (13) 6.0 μg/m3 (25) 36.0
 
March 29, 2021, 1 a.m. 0.6 ppb (1) -0.2 ppb (0) 1.2 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (37) 0.14 ppb (2) 9.0 μg/m3 (9) 3.0 μg/m3 (13) 37.0
 
March 29, 2021, midnight 1.2 ppb (2) 0.1 ppb (1) 1.7 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) 0.14 ppb (2) 9.0 μg/m3 (9) 1.0 μg/m3 (5) 35.0
 
March 28, 2021, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) 1.5 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (37) 0.14 ppb (2) 9.0 μg/m3 (9) 0.0 μg/m3 (0) 37.0
 
March 28, 2021, 10 p.m. 1.9 ppb (2) 0.4 ppb (1) 2.3 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (38) 0.15 ppb (2) 10.0 μg/m3 (10) 5.0 μg/m3 (21) 38.0
 
March 28, 2021, 9 p.m. 2.0 ppb (2) 0.2 ppb (1) 2.1 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (35) 0.15 ppb (2) 13.0 μg/m3 (13) 9.0 μg/m3 (38) 38.0
 
March 28, 2021, 8 p.m. 3.2 ppb (4) 0.6 ppb (1) 3.6 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (27) 0.19 ppb (3) 6.0 μg/m3 (6) 11.0 μg/m3 (46) 46.0
 
March 28, 2021, 7 p.m. 2.4 ppb (3) 0.7 ppb (1) 2.7 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (28) 0.19 ppb (3) 20.0 μg/m3 (19) 12.0 μg/m3 (50) 50.0
 
March 28, 2021, 6 p.m. 2.0 ppb (2) 0.3 ppb (1) 2.8 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (32) 0.18 ppb (3) 11.0 μg/m3 (11) 9.0 μg/m3 (38) 38.0
 
March 28, 2021, 5 p.m. 1.4 ppb (2) 0.2 ppb (1) 2.3 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (33) 0.17 ppb (3) 20.0 μg/m3 (19) 9.0 μg/m3 (38) 38.0
 
March 28, 2021, 4 p.m. 1.6 ppb (2) 0.6 ppb (1) 2.6 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (31) 0.16 ppb (3) 23.0 μg/m3 (22) 14.0 μg/m3 (55) 55.0
 
March 28, 2021, 3 p.m. 1.7 ppb (2) 0.6 ppb (1) 2.4 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 28.0 ppb (26) 0.16 ppb (3) 14.0 μg/m3 (13) 7.0 μg/m3 (30) 30.0
 
March 28, 2021, 2 p.m. 2.5 ppb (3) 1.0 ppb (1) 3.0 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (22) 0.17 ppb (3) 12.0 μg/m3 (12) 8.0 μg/m3 (34) 34.0
 
March 28, 2021, 1 p.m. 2.1 ppb (2) 0.6 ppb (1) 2.5 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (21) 0.16 ppb (3) 10.0 μg/m3 (10) 8.0 μg/m3 (34) 34.0
 
March 28, 2021, noon 2.1 ppb (2) 0.3 ppb (1) 2.7 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 20.0 ppb (19) 0.19 ppb (3) 11.0 μg/m3 (11) 6.0 μg/m3 (25) 25.0
 
March 28, 2021, 11 a.m. 1.7 ppb (2) 0.1 ppb (1) 2.2 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 22.0 ppb (21) 0.18 ppb (3) 7.0 μg/m3 (7) 7.0 μg/m3 (30) 30.0
 
March 28, 2021, 10 a.m. 1.0 ppb (1) 0.0 ppb (0) 1.4 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (27) 0.16 ppb (3) 14.0 μg/m3 (13) 9.0 μg/m3 (38) 38.0
 
March 28, 2021, 9 a.m. 1.8 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 18.0 ppb (17) 0.19 ppb (3) 15.0 μg/m3 (14) 17.0 μg/m3 (62) 62.0
 
March 28, 2021, 8 a.m. 2.0 ppb (2) -0.1 ppb (0) 2.9 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.21 ppb (3) 14.0 μg/m3 (13) 13.0 μg/m3 (53) 53.0
 
March 28, 2021, 7 a.m. 4.4 ppb (5) 1.3 ppb (2) 3.1 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 16.0 ppb (15) 0.22 ppb (3) 16.0 μg/m3 (15) 6.0 μg/m3 (25) 25.0