ID: 739

AQSQID: 440071010

Site Name: E Providence

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

Updated: April 21, 2021, 7:45 p.m.

Location: Rumford (Rumford), RI

Reporting: True, Located: True

Current AQI: 45.0

Rumford (Rumford) RI, US: 41.840302, -71.361702

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 21, 2021, 6 p.m. 4.0 ppb (4) 0.3 ppb (1) 3.9 ppb (4) 4.0 ppb (4) 3.6 ppb (4) 0.0 ppb (0) 48.0 ppb (45) 0.17 ppb (3) N/A N/A 45.0
 
April 21, 2021, 5 p.m. 2.8 ppb (3) 0.3 ppb (1) 2.8 ppb (3) 3.0 ppb (3) 2.5 ppb (3) 0.0 ppb (0) N/A 0.18 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
April 21, 2021, 4 p.m. 2.1 ppb (2) 0.4 ppb (1) 2.3 ppb (3) 2.0 ppb (2) 1.9 ppb (2) 0.0 ppb (0) N/A 0.17 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
April 21, 2021, 3 p.m. 1.9 ppb (2) 0.4 ppb (1) 2.2 ppb (3) 2.0 ppb (2) 1.9 ppb (2) 0.0 ppb (0) N/A 0.17 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
April 21, 2021, 2 p.m. 2.4 ppb (3) 0.4 ppb (1) 2.6 ppb (3) 2.0 ppb (2) 2.2 ppb (3) 0.0 ppb (0) N/A 0.18 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
April 21, 2021, 1 p.m. 3.1 ppb (3) 0.5 ppb (1) 3.1 ppb (3) 3.0 ppb (3) 2.5 ppb (3) 0.0 ppb (0) 48.0 ppb (45) 0.17 ppb (3) N/A 9.0 μg/m3 (38) 45.0
 
April 21, 2021, noon 4.3 ppb (5) 0.6 ppb (1) 4.4 ppb (5) 4.0 ppb (4) 3.7 ppb (4) 0.0 ppb (0) 46.0 ppb (43) 0.19 ppb (3) N/A 9.0 μg/m3 (38) 43.0
 
April 21, 2021, 11 a.m. 6.0 ppb (6) 0.6 ppb (1) 5.9 ppb (6) 5.0 ppb (5) 5.3 ppb (5) 0.0 ppb (0) 44.0 ppb (41) 0.19 ppb (3) N/A 7.0 μg/m3 (30) 41.0
 
April 21, 2021, 10 a.m. 8.2 ppb (8) 0.6 ppb (1) 8.7 ppb (9) 8.0 ppb (8) 7.8 ppb (8) 0.0 ppb (0) 40.0 ppb (38) 0.2 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
April 21, 2021, 9 a.m. 6.8 ppb (7) 0.1 ppb (1) 6.5 ppb (7) 7.0 ppb (7) 6.3 ppb (6) 0.0 ppb (0) 42.0 ppb (39) 0.18 ppb (3) N/A 8.0 μg/m3 (34) 39.0
 
April 21, 2021, 8 a.m. 5.8 ppb (6) 0.2 ppb (1) 5.1 ppb (5) 6.0 ppb (6) 4.9 ppb (5) 0.0 ppb (0) 45.0 ppb (42) 0.17 ppb (3) N/A 8.0 μg/m3 (34) 42.0
 
April 21, 2021, 7 a.m. 3.5 ppb (4) 0.1 ppb (1) 3.3 ppb (4) 3.0 ppb (3) 3.2 ppb (4) 0.0 ppb (0) 49.0 ppb (46) 0.16 ppb (3) N/A 7.0 μg/m3 (30) 46.0
 
April 21, 2021, 6 a.m. 3.8 ppb (4) 0.0 ppb (0) 3.5 ppb (4) 4.0 ppb (4) 3.5 ppb (4) 0.0 ppb (0) 48.0 ppb (45) 0.17 ppb (3) N/A 9.0 μg/m3 (38) 45.0
 
April 21, 2021, 5 a.m. 4.0 ppb (4) 0.1 ppb (1) 4.3 ppb (5) 4.0 ppb (4) 3.9 ppb (4) 0.0 ppb (0) 47.0 ppb (44) 0.17 ppb (3) N/A 9.0 μg/m3 (38) 44.0
 
April 21, 2021, 4 a.m. 3.9 ppb (4) 0.1 ppb (1) 3.5 ppb (4) 4.0 ppb (4) 3.4 ppb (4) 0.0 ppb (0) 46.0 ppb (43) 0.17 ppb (3) N/A 7.0 μg/m3 (30) 43.0
 
April 21, 2021, 3 a.m. 5.0 ppb (5) 0.1 ppb (1) 4.4 ppb (5) 5.0 ppb (5) 4.3 ppb (5) 0.0 ppb (0) 46.0 ppb (43) 0.18 ppb (3) N/A 6.0 μg/m3 (25) 43.0
 
April 21, 2021, 2 a.m. 4.5 ppb (5) 0.1 ppb (1) 3.9 ppb (4) 4.0 ppb (4) 3.8 ppb (4) 0.0 ppb (0) 49.0 ppb (46) 0.18 ppb (3) N/A 9.0 μg/m3 (38) 46.0
 
April 21, 2021, 1 a.m. 3.9 ppb (4) 0.1 ppb (1) 3.9 ppb (4) 4.0 ppb (4) 3.8 ppb (4) 0.0 ppb (0) 53.0 ppb (50) 0.18 ppb (3) N/A 10.0 μg/m3 (42) 50.0
 
April 21, 2021, midnight 4.5 ppb (5) 0.1 ppb (1) 4.4 ppb (5) 4.0 ppb (4) 4.3 ppb (5) 0.0 ppb (0) 53.0 ppb (50) 0.19 ppb (3) N/A 9.0 μg/m3 (38) 50.0
 
April 20, 2021, 11 p.m. 4.4 ppb (5) 0.1 ppb (1) 4.3 ppb (5) 4.0 ppb (4) 4.2 ppb (4) 0.0 ppb (0) 56.0 ppb (55) 0.18 ppb (3) N/A 9.0 μg/m3 (38) 55.0
 
April 20, 2021, 10 p.m. 3.8 ppb (4) 0.1 ppb (1) 3.9 ppb (4) 4.0 ppb (4) 3.8 ppb (4) 0.0 ppb (0) 61.0 ppb (71) 0.18 ppb (3) N/A 8.0 μg/m3 (34) 71.0
 
April 20, 2021, 9 p.m. 4.6 ppb (5) 0.3 ppb (1) 5.0 ppb (5) 4.0 ppb (4) 4.7 ppb (5) 0.0 ppb (0) 61.0 ppb (71) 0.2 ppb (3) N/A 10.0 μg/m3 (42) 71.0
 
April 20, 2021, 8 p.m. 5.6 ppb (6) 0.7 ppb (1) 5.8 ppb (6) 5.0 ppb (5) 5.2 ppb (5) 0.0 ppb (0) 60.0 ppb (68) 0.22 ppb (3) N/A 9.0 μg/m3 (38) 68.0
 
April 20, 2021, 7 p.m. 6.1 ppb (6) 0.7 ppb (1) 6.4 ppb (7) 5.0 ppb (5) 5.7 ppb (6) 0.0 ppb (0) 59.0 ppb (65) 0.19 ppb (3) N/A 8.0 μg/m3 (34) 65.0
 
April 20, 2021, 6 p.m. 7.5 ppb (8) 0.9 ppb (1) 7.8 ppb (8) 7.0 ppb (7) 6.9 ppb (7) 0.0 ppb (0) 56.0 ppb (55) 0.19 ppb (3) N/A 9.0 μg/m3 (38) 55.0
 
April 20, 2021, 5 p.m. 6.5 ppb (7) 1.1 ppb (2) 6.7 ppb (7) 5.0 ppb (5) 5.7 ppb (6) 0.0 ppb (0) 56.0 ppb (55) 0.18 ppb (3) N/A 10.0 μg/m3 (42) 55.0
 
April 20, 2021, 4 p.m. 5.1 ppb (5) 0.9 ppb (1) 5.4 ppb (6) 4.0 ppb (4) 4.5 ppb (5) 0.0 ppb (0) 56.0 ppb (55) 0.17 ppb (3) N/A 10.0 μg/m3 (42) 55.0
 
April 20, 2021, 3 p.m. 4.9 ppb (5) 0.9 ppb (1) 4.9 ppb (5) 4.0 ppb (4) 4.1 ppb (4) 0.0 ppb (0) 52.0 ppb (49) 0.16 ppb (3) N/A 5.0 μg/m3 (21) 49.0
 
April 20, 2021, 2 p.m. 6.7 ppb (7) 1.5 ppb (2) 6.5 ppb (7) 5.0 ppb (5) 5.1 ppb (5) 0.0 ppb (0) 47.0 ppb (44) 0.17 ppb (3) N/A 6.0 μg/m3 (25) 44.0
 
April 20, 2021, 1 p.m. 20.5 ppb (20) 7.4 ppb (7) 19.9 ppb (19) 13.0 ppb (13) 12.5 ppb (12) 0.0 ppb (0) 32.0 ppb (30) 0.26 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 20, 2021, noon 32.1 ppb (31) 11.7 ppb (12) 33.1 ppb (32) 20.0 ppb (19) 21.2 ppb (20) 1.0 ppb (2) 19.0 ppb (18) 0.36 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
April 20, 2021, 11 a.m. 41.0 ppb (39) 18.0 ppb (17) 43.5 ppb (42) 23.0 ppb (22) 24.6 ppb (24) 0.0 ppb (0) 9.0 ppb (9) 0.38 ppb (5) N/A 7.0 μg/m3 (30) 42.0
 
April 20, 2021, 10 a.m. 33.8 ppb (32) 16.3 ppb (16) 39.8 ppb (38) 18.0 ppb (17) 22.9 ppb (22) 0.0 ppb (0) 2.0 ppb (2) 0.34 ppb (4) N/A 8.0 μg/m3 (34) 38.0
 
April 20, 2021, 9 a.m. 25.9 ppb (25) 4.1 ppb (4) 31.0 ppb (30) 22.0 ppb (21) 26.9 ppb (26) 0.0 ppb (0) N/A 0.29 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 20, 2021, 8 a.m. 21.2 ppb (20) 0.6 ppb (1) 27.6 ppb (27) 21.0 ppb (20) 22.9 ppb (22) 0.0 ppb (0) 8.0 ppb (8) 0.26 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
April 20, 2021, 7 a.m. 20.4 ppb (20) 0.7 ppb (1) 23.1 ppb (22) 20.0 ppb (19) 22.2 ppb (21) 0.0 ppb (0) 8.0 ppb (8) 0.27 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
April 20, 2021, 6 a.m. 15.5 ppb (15) 0.2 ppb (1) 20.9 ppb (20) 15.0 ppb (15) 20.5 ppb (20) 0.0 ppb (0) 14.0 ppb (13) 0.24 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
April 20, 2021, 5 a.m. 12.3 ppb (12) 0.1 ppb (1) 14.2 ppb (14) 12.0 ppb (12) 13.8 ppb (14) 0.0 ppb (0) 23.0 ppb (22) 0.24 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
April 20, 2021, 4 a.m. 13.6 ppb (13) 0.1 ppb (1) 13.3 ppb (13) 14.0 ppb (14) 13.2 ppb (13) 0.0 ppb (0) 27.0 ppb (25) 0.26 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 20, 2021, 3 a.m. 7.8 ppb (8) 0.0 ppb (0) 7.7 ppb (8) 8.0 ppb (8) 7.6 ppb (8) 0.0 ppb (0) 35.0 ppb (33) 0.2 ppb (3) N/A 6.0 μg/m3 (25) 33.0
 
April 20, 2021, 2 a.m. 8.2 ppb (8) 0.1 ppb (1) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 34.0 ppb (32) 0.22 ppb (3) N/A 5.0 μg/m3 (21) 32.0
 
April 20, 2021, 1 a.m. 10.7 ppb (11) 0.1 ppb (1) 10.7 ppb (11) 11.0 ppb (11) 10.6 ppb (10) 0.0 ppb (0) 32.0 ppb (30) 0.21 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
April 20, 2021, midnight 6.9 ppb (7) 0.1 ppb (1) 7.0 ppb (7) 7.0 ppb (7) 6.9 ppb (7) 0.0 ppb (0) 38.0 ppb (36) 0.17 ppb (3) N/A 5.0 μg/m3 (21) 36.0
 
April 19, 2021, 11 p.m. 4.3 ppb (5) 0.1 ppb (1) 4.0 ppb (4) 4.0 ppb (4) 3.9 ppb (4) 0.0 ppb (0) 43.0 ppb (40) 0.17 ppb (3) N/A 7.0 μg/m3 (30) 40.0
 
April 19, 2021, 10 p.m. 4.2 ppb (4) 0.2 ppb (1) 3.9 ppb (4) 4.0 ppb (4) 3.7 ppb (4) 0.0 ppb (0) 42.0 ppb (39) 0.17 ppb (3) N/A 8.0 μg/m3 (34) 39.0
 
April 19, 2021, 9 p.m. 2.9 ppb (3) 0.4 ppb (1) 2.7 ppb (3) 3.0 ppb (3) 2.3 ppb (3) 0.0 ppb (0) 43.0 ppb (40) 0.17 ppb (3) N/A 8.0 μg/m3 (34) 40.0
 
April 19, 2021, 8 p.m. 2.2 ppb (3) 0.3 ppb (1) 2.0 ppb (2) 2.0 ppb (2) 1.7 ppb (2) 0.0 ppb (0) 45.0 ppb (42) 0.16 ppb (3) N/A 6.0 μg/m3 (25) 42.0
 
April 19, 2021, 7 p.m. 2.5 ppb (3) 0.4 ppb (1) 2.2 ppb (3) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 44.0 ppb (41) 0.16 ppb (3) N/A 4.0 μg/m3 (17) 41.0
 
April 19, 2021, 6 p.m. 2.8 ppb (3) 0.5 ppb (1) 2.6 ppb (3) 2.0 ppb (2) 2.1 ppb (2) 0.0 ppb (0) 44.0 ppb (41) 0.16 ppb (3) N/A 5.0 μg/m3 (21) 41.0
 
April 19, 2021, 5 p.m. 2.7 ppb (3) 0.4 ppb (1) 2.5 ppb (3) 2.0 ppb (2) 2.0 ppb (2) 0.0 ppb (0) 44.0 ppb (41) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 41.0
 
April 19, 2021, 4 p.m. 2.3 ppb (3) 0.4 ppb (1) 2.1 ppb (2) 2.0 ppb (2) 1.7 ppb (2) 0.0 ppb (0) 42.0 ppb (39) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 39.0
 
April 19, 2021, 3 p.m. 2.3 ppb (3) 0.5 ppb (1) 2.1 ppb (2) 2.0 ppb (2) 1.6 ppb (2) 0.0 ppb (0) 40.0 ppb (38) 0.15 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
April 19, 2021, 2 p.m. 3.4 ppb (4) 1.0 ppb (1) 3.2 ppb (4) 2.0 ppb (2) 2.3 ppb (3) 0.0 ppb (0) 36.0 ppb (34) 0.17 ppb (3) N/A 6.0 μg/m3 (25) 34.0
 
April 19, 2021, 1 p.m. 6.5 ppb (7) 2.1 ppb (2) 6.4 ppb (7) 4.0 ppb (4) 4.3 ppb (5) 0.0 ppb (0) 30.0 ppb (28) 0.19 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
April 19, 2021, noon 28.6 ppb (27) 13.8 ppb (14) 29.1 ppb (28) 15.0 ppb (15) 15.1 ppb (15) 0.0 ppb (0) 17.0 ppb (16) 0.36 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
April 19, 2021, 11 a.m. 44.8 ppb (43) 26.3 ppb (25) 46.4 ppb (44) 19.0 ppb (18) 21.2 ppb (20) 0.0 ppb (0) 5.0 ppb (5) 0.56 ppb (7) N/A 11.0 μg/m3 (46) 46.0
 
April 19, 2021, 10 a.m. 40.5 ppb (39) 24.1 ppb (23) 54.6 ppb (52) 16.0 ppb (16) 23.4 ppb (23) 0.0 ppb (0) 2.0 ppb (2) 0.44 ppb (5) N/A 9.0 μg/m3 (38) 52.0
 
April 19, 2021, 9 a.m. 32.6 ppb (31) 11.0 ppb (11) 34.5 ppb (33) 22.0 ppb (21) 27.9 ppb (27) 0.0 ppb (0) 1.0 ppb (1) 0.38 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 19, 2021, 8 a.m. 26.6 ppb (26) 5.8 ppb (6) 26.3 ppb (25) 21.0 ppb (20) 22.2 ppb (21) 0.0 ppb (0) 2.0 ppb (2) 0.36 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
April 19, 2021, 7 a.m. 20.4 ppb (20) 2.1 ppb (2) 25.6 ppb (25) 18.0 ppb (17) 21.5 ppb (21) 0.0 ppb (0) 3.0 ppb (3) 0.34 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 19, 2021, 6 a.m. N/A N/A 25.6 ppb (25) N/A 20.4 ppb (20) N/A 4.0 ppb (4) N/A N/A 13.0 μg/m3 (53) 53.0
 
April 19, 2021, 5 a.m. N/A N/A 24.2 ppb (23) N/A 23.5 ppb (23) N/A 9.0 ppb (9) N/A N/A 10.0 μg/m3 (42) 42.0
 
April 19, 2021, 4 a.m. 18.6 ppb (18) 0.8 ppb (1) 20.8 ppb (20) 18.0 ppb (17) 19.6 ppb (19) 0.0 ppb (0) 16.0 ppb (15) 0.34 ppb (4) N/A 13.0 μg/m3 (53) 53.0
 
April 19, 2021, 3 a.m. 16.1 ppb (16) 0.8 ppb (1) 16.6 ppb (16) 15.0 ppb (15) 15.8 ppb (15) 0.0 ppb (0) 16.0 ppb (15) 0.32 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
April 19, 2021, 2 a.m. 16.2 ppb (16) 0.7 ppb (1) 15.3 ppb (15) 16.0 ppb (16) 14.2 ppb (14) 0.0 ppb (0) 16.0 ppb (15) 0.32 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 19, 2021, 1 a.m. 12.6 ppb (12) 0.2 ppb (1) 13.2 ppb (13) 13.0 ppb (13) 12.9 ppb (13) 0.0 ppb (0) 25.0 ppb (24) 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
April 19, 2021, midnight 7.8 ppb (8) 0.1 ppb (1) 7.8 ppb (8) 8.0 ppb (8) 7.5 ppb (8) 0.0 ppb (0) 33.0 ppb (31) 0.21 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
April 18, 2021, 11 p.m. 2.7 ppb (3) 0.0 ppb (0) 2.4 ppb (3) 3.0 ppb (3) 2.4 ppb (3) 0.0 ppb (0) 41.0 ppb (38) 0.16 ppb (3) N/A 8.0 μg/m3 (34) 38.0
 
April 18, 2021, 10 p.m. 1.8 ppb (2) 0.2 ppb (1) 1.5 ppb (2) 2.0 ppb (2) 1.4 ppb (2) 0.0 ppb (0) 42.0 ppb (39) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 39.0
 
April 18, 2021, 9 p.m. 1.6 ppb (2) 0.2 ppb (1) 1.3 ppb (2) 2.0 ppb (2) 1.1 ppb (2) 0.0 ppb (0) 42.0 ppb (39) 0.14 ppb (2) N/A 4.0 μg/m3 (17) 39.0
 
April 18, 2021, 8 p.m. 1.5 ppb (2) 0.2 ppb (1) 1.2 ppb (2) 1.0 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 42.0 ppb (39) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 39.0
 
April 18, 2021, 7 p.m. 1.3 ppb (2) 0.2 ppb (1) 1.0 ppb (1) 1.0 ppb (1) 0.9 ppb (1) 0.0 ppb (0) 41.0 ppb (38) 0.14 ppb (2) N/A 4.0 μg/m3 (17) 38.0
 
April 18, 2021, 6 p.m. 1.0 ppb (1) 0.2 ppb (1) 0.7 ppb (1) 1.0 ppb (1) 0.5 ppb (1) 0.0 ppb (0) 41.0 ppb (38) 0.14 ppb (2) N/A 4.0 μg/m3 (17) 38.0
 
April 18, 2021, 5 p.m. 1.0 ppb (1) 0.2 ppb (1) 0.7 ppb (1) 1.0 ppb (1) 0.5 ppb (1) 0.0 ppb (0) 40.0 ppb (38) 0.14 ppb (2) N/A 7.0 μg/m3 (30) 38.0
 
April 18, 2021, 4 p.m. 1.1 ppb (2) 0.2 ppb (1) 0.9 ppb (1) 1.0 ppb (1) 0.7 ppb (1) 0.0 ppb (0) 39.0 ppb (37) 0.14 ppb (2) N/A 8.0 μg/m3 (34) 37.0
 
April 18, 2021, 3 p.m. 1.5 ppb (2) 0.3 ppb (1) 1.3 ppb (2) 1.0 ppb (1) 1.0 ppb (1) 0.0 ppb (0) 40.0 ppb (38) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 38.0
 
April 18, 2021, 2 p.m. 1.7 ppb (2) 0.5 ppb (1) 1.6 ppb (2) 1.0 ppb (1) 1.1 ppb (2) 0.0 ppb (0) 38.0 ppb (36) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 36.0
 
April 18, 2021, 1 p.m. 2.9 ppb (3) 0.7 ppb (1) 2.8 ppb (3) 2.0 ppb (2) 2.0 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 34.0
 
April 18, 2021, noon 5.8 ppb (6) 0.7 ppb (1) 5.7 ppb (6) 5.0 ppb (5) 5.0 ppb (5) 0.0 ppb (0) 30.0 ppb (28) 0.17 ppb (3) N/A 5.0 μg/m3 (21) 28.0
 
April 18, 2021, 11 a.m. 7.2 ppb (7) 0.5 ppb (1) 7.0 ppb (7) 7.0 ppb (7) 6.5 ppb (7) 0.0 ppb (0) 26.0 ppb (25) 0.18 ppb (3) N/A 1.0 μg/m3 (5) 25.0
 
April 18, 2021, 10 a.m. 8.8 ppb (9) 0.3 ppb (1) 9.3 ppb (9) 8.0 ppb (8) 8.9 ppb (9) 0.0 ppb (0) 21.0 ppb (20) 0.2 ppb (3) N/A 1.0 μg/m3 (5) 20.0
 
April 18, 2021, 9 a.m. 6.7 ppb (7) 0.2 ppb (1) 6.7 ppb (7) 7.0 ppb (7) 6.5 ppb (7) 0.0 ppb (0) 22.0 ppb (21) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 21.0
 
April 18, 2021, 8 a.m. 5.1 ppb (5) 0.1 ppb (1) 4.9 ppb (5) 5.0 ppb (5) 4.8 ppb (5) 0.0 ppb (0) 24.0 ppb (23) 0.17 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 18, 2021, 7 a.m. 4.8 ppb (5) 0.1 ppb (1) 4.6 ppb (5) 5.0 ppb (5) 4.5 ppb (5) 0.0 ppb (0) 25.0 ppb (24) 0.18 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 18, 2021, 6 a.m. 5.7 ppb (6) 0.1 ppb (1) 5.6 ppb (6) 6.0 ppb (6) 5.6 ppb (6) 0.0 ppb (0) 24.0 ppb (23) 0.19 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 18, 2021, 5 a.m. 5.6 ppb (6) 0.1 ppb (1) 5.5 ppb (6) 6.0 ppb (6) 5.5 ppb (6) 0.0 ppb (0) 24.0 ppb (23) 0.2 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
April 18, 2021, 4 a.m. 8.7 ppb (9) 0.1 ppb (1) 8.9 ppb (9) 9.0 ppb (9) 8.8 ppb (9) 0.0 ppb (0) 22.0 ppb (21) 0.22 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
April 18, 2021, 3 a.m. 12.3 ppb (12) 0.1 ppb (1) 12.4 ppb (12) 12.0 ppb (12) 12.3 ppb (12) 0.0 ppb (0) 20.0 ppb (19) 0.27 ppb (4) N/A 10.0 μg/m3 (42) 42.0
 
April 18, 2021, 2 a.m. 11.4 ppb (11) 0.1 ppb (1) 11.8 ppb (12) 11.0 ppb (11) 11.8 ppb (12) 0.0 ppb (0) 21.0 ppb (20) 0.26 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 18, 2021, 1 a.m. 8.1 ppb (8) 0.2 ppb (1) 7.8 ppb (8) 8.0 ppb (8) 7.6 ppb (8) 0.0 ppb (0) 24.0 ppb (23) 0.21 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
April 18, 2021, midnight 6.1 ppb (6) 0.0 ppb (0) 6.0 ppb (6) 6.0 ppb (6) 6.0 ppb (6) 0.0 ppb (0) 27.0 ppb (25) 0.21 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 17, 2021, 11 p.m. 4.0 ppb (4) 0.1 ppb (1) 3.8 ppb (4) 4.0 ppb (4) 3.6 ppb (4) 0.0 ppb (0) 31.0 ppb (29) 0.18 ppb (3) N/A 4.0 μg/m3 (17) 29.0
 
April 17, 2021, 10 p.m. 2.4 ppb (3) 0.2 ppb (1) 2.2 ppb (3) 2.0 ppb (2) 2.0 ppb (2) 0.0 ppb (0) 34.0 ppb (32) 0.16 ppb (3) N/A 1.0 μg/m3 (5) 32.0
 
April 17, 2021, 9 p.m. 2.3 ppb (3) 0.3 ppb (1) 2.0 ppb (2) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 34.0 ppb (32) 0.16 ppb (3) N/A 1.0 μg/m3 (5) 32.0
 
April 17, 2021, 8 p.m. 2.0 ppb (2) 0.3 ppb (1) 1.7 ppb (2) 2.0 ppb (2) 1.4 ppb (2) 0.0 ppb (0) 34.0 ppb (32) 0.16 ppb (3) N/A 3.0 μg/m3 (13) 32.0
 
April 17, 2021, 7 p.m. 2.7 ppb (3) 0.6 ppb (1) 2.4 ppb (3) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 33.0 ppb (31) 0.17 ppb (3) N/A 2.0 μg/m3 (9) 31.0
 
April 17, 2021, 6 p.m. 2.0 ppb (2) 0.5 ppb (1) 1.7 ppb (2) 1.0 ppb (1) 1.1 ppb (2) 0.0 ppb (0) 34.0 ppb (32) 0.16 ppb (3) N/A 1.0 μg/m3 (5) 32.0
 
April 17, 2021, 5 p.m. 2.1 ppb (2) 0.7 ppb (1) 1.9 ppb (2) 2.0 ppb (2) 1.3 ppb (2) 0.0 ppb (0) 34.0 ppb (32) 0.16 ppb (3) N/A 0.0 μg/m3 (0) 32.0
 
April 17, 2021, 4 p.m. 2.7 ppb (3) 0.6 ppb (1) 2.5 ppb (3) 2.0 ppb (2) 1.9 ppb (2) 0.0 ppb (0) 33.0 ppb (31) 0.16 ppb (3) N/A -1.0 μg/m3 (0) 31.0
 
April 17, 2021, 3 p.m. 2.3 ppb (3) 0.5 ppb (1) 2.1 ppb (2) 2.0 ppb (2) 1.5 ppb (2) 0.0 ppb (0) 33.0 ppb (31) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 31.0
 
April 17, 2021, 2 p.m. 2.3 ppb (3) 0.5 ppb (1) 2.0 ppb (2) 2.0 ppb (2) 1.5 ppb (2) 0.0 ppb (0) 32.0 ppb (30) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 30.0
 
April 17, 2021, 1 p.m. 2.5 ppb (3) 0.6 ppb (1) 2.2 ppb (3) 2.0 ppb (2) 1.6 ppb (2) 0.0 ppb (0) 32.0 ppb (30) 0.15 ppb (2) N/A 1.0 μg/m3 (5) 30.0
 
April 17, 2021, noon 3.3 ppb (4) 0.6 ppb (1) 2.6 ppb (3) 3.0 ppb (3) 2.1 ppb (2) 0.0 ppb (0) 33.0 ppb (31) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 31.0
 
April 17, 2021, 11 a.m. 2.9 ppb (3) 0.3 ppb (1) 2.6 ppb (3) 3.0 ppb (3) 2.3 ppb (3) 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) N/A 0.0 μg/m3 (0) 32.0
 
April 17, 2021, 10 a.m. 3.0 ppb (3) 0.2 ppb (1) 2.6 ppb (3) 3.0 ppb (3) 2.4 ppb (3) 0.0 ppb (0) 35.0 ppb (33) 0.15 ppb (2) N/A 0.0 μg/m3 (0) 33.0
 
April 17, 2021, 9 a.m. 2.6 ppb (3) 0.1 ppb (1) 2.2 ppb (3) 3.0 ppb (3) 2.1 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.14 ppb (2) N/A 3.0 μg/m3 (13) 34.0
 
April 17, 2021, 8 a.m. 2.2 ppb (3) 0.1 ppb (1) 1.8 ppb (2) 2.0 ppb (2) 1.7 ppb (2) 0.0 ppb (0) 37.0 ppb (35) 0.14 ppb (2) N/A 3.0 μg/m3 (13) 35.0
 
April 17, 2021, 7 a.m. 2.1 ppb (2) 0.1 ppb (1) 1.7 ppb (2) 2.0 ppb (2) 1.6 ppb (2) 0.0 ppb (0) 37.0 ppb (35) 0.14 ppb (2) N/A 3.0 μg/m3 (13) 35.0
 
April 17, 2021, 6 a.m. 1.9 ppb (2) 0.1 ppb (1) 1.5 ppb (2) 2.0 ppb (2) 1.4 ppb (2) 0.0 ppb (0) 37.0 ppb (35) 0.14 ppb (2) N/A 1.0 μg/m3 (5) 35.0
 
April 17, 2021, 5 a.m. 2.0 ppb (2) 0.1 ppb (1) 1.6 ppb (2) 2.0 ppb (2) 1.5 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 34.0
 
April 17, 2021, 4 a.m. 2.1 ppb (2) 0.1 ppb (1) 1.7 ppb (2) 2.0 ppb (2) 1.6 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.14 ppb (2) N/A 1.0 μg/m3 (5) 34.0
 
April 17, 2021, 3 a.m. 2.1 ppb (2) 0.1 ppb (1) 1.7 ppb (2) 2.0 ppb (2) 1.6 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.15 ppb (2) N/A 0.0 μg/m3 (0) 34.0
 
April 17, 2021, 2 a.m. 2.4 ppb (3) 0.1 ppb (1) 2.0 ppb (2) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.15 ppb (2) N/A 1.0 μg/m3 (5) 34.0
 
April 17, 2021, 1 a.m. 2.1 ppb (2) 0.1 ppb (1) 1.7 ppb (2) 2.0 ppb (2) 1.6 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.15 ppb (2) N/A 3.0 μg/m3 (13) 34.0
 
April 17, 2021, midnight 2.5 ppb (3) 0.2 ppb (1) 2.1 ppb (2) 2.0 ppb (2) 2.0 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.15 ppb (2) N/A 3.0 μg/m3 (13) 34.0
 
April 16, 2021, 11 p.m. 2.6 ppb (3) 0.2 ppb (1) 2.1 ppb (2) 2.0 ppb (2) 2.0 ppb (2) 0.0 ppb (0) 35.0 ppb (33) 0.15 ppb (2) N/A 0.0 μg/m3 (0) 33.0
 
April 16, 2021, 10 p.m. 2.6 ppb (3) 0.3 ppb (1) 2.2 ppb (3) 2.0 ppb (2) 2.0 ppb (2) 0.0 ppb (0) 35.0 ppb (33) 0.16 ppb (3) N/A 1.0 μg/m3 (5) 33.0
 
April 16, 2021, 9 p.m. 2.7 ppb (3) 0.2 ppb (1) 2.3 ppb (3) 2.0 ppb (2) 2.0 ppb (2) 0.0 ppb (0) 35.0 ppb (33) 0.16 ppb (3) N/A 2.0 μg/m3 (9) 33.0
 
April 16, 2021, 8 p.m. 2.5 ppb (3) 0.2 ppb (1) 2.1 ppb (2) 2.0 ppb (2) 1.9 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.15 ppb (2) N/A 3.0 μg/m3 (13) 34.0
 
April 16, 2021, 7 p.m. 2.9 ppb (3) 0.3 ppb (1) 2.6 ppb (3) 3.0 ppb (3) 2.3 ppb (3) 0.0 ppb (0) 36.0 ppb (34) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 34.0
 
April 16, 2021, 6 p.m. 3.1 ppb (3) 0.3 ppb (1) 2.8 ppb (3) 3.0 ppb (3) 2.4 ppb (3) 0.0 ppb (0) 37.0 ppb (35) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 35.0
 
April 16, 2021, 5 p.m. 3.2 ppb (4) 0.4 ppb (1) 2.8 ppb (3) 3.0 ppb (3) 2.4 ppb (3) 0.0 ppb (0) 38.0 ppb (36) 0.15 ppb (2) N/A 1.0 μg/m3 (5) 36.0
 
April 16, 2021, 4 p.m. 3.4 ppb (4) 0.5 ppb (1) 3.1 ppb (3) 3.0 ppb (3) 2.5 ppb (3) 0.0 ppb (0) 38.0 ppb (36) 0.15 ppb (2) N/A -2.0 μg/m3 (0) 36.0
 
April 16, 2021, 3 p.m. 4.1 ppb (4) 0.5 ppb (1) 3.8 ppb (4) 4.0 ppb (4) 3.3 ppb (4) 0.0 ppb (0) 38.0 ppb (36) 0.16 ppb (3) N/A 1.0 μg/m3 (5) 36.0
 
April 16, 2021, 2 p.m. 6.4 ppb (7) 0.9 ppb (1) 6.1 ppb (6) 6.0 ppb (6) 5.3 ppb (5) 0.0 ppb (0) 36.0 ppb (34) 0.17 ppb (3) N/A 3.0 μg/m3 (13) 34.0
 
April 16, 2021, 1 p.m. 5.7 ppb (6) 0.6 ppb (1) 5.6 ppb (6) 5.0 ppb (5) 5.0 ppb (5) 0.0 ppb (0) 39.0 ppb (37) 0.17 ppb (3) N/A 1.0 μg/m3 (5) 37.0
 
April 16, 2021, noon 3.1 ppb (3) 0.3 ppb (1) 3.0 ppb (3) 3.0 ppb (3) 2.7 ppb (3) 0.0 ppb (0) 43.0 ppb (40) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 40.0
 
April 16, 2021, 11 a.m. 5.5 ppb (6) 0.2 ppb (1) 5.4 ppb (6) 5.0 ppb (5) 5.1 ppb (5) 0.0 ppb (0) 39.0 ppb (37) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 37.0
 
April 16, 2021, 10 a.m. 5.3 ppb (5) 0.2 ppb (1) 5.2 ppb (5) 5.0 ppb (5) 5.0 ppb (5) 0.0 ppb (0) 38.0 ppb (36) 0.17 ppb (3) N/A 3.0 μg/m3 (13) 36.0
 
April 16, 2021, 9 a.m. 3.4 ppb (4) 0.1 ppb (1) 3.3 ppb (4) 3.0 ppb (3) 3.1 ppb (3) 0.0 ppb (0) 40.0 ppb (38) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 38.0
 
April 16, 2021, 8 a.m. 3.7 ppb (4) 0.2 ppb (1) 3.7 ppb (4) 4.0 ppb (4) 3.5 ppb (4) 0.0 ppb (0) 37.0 ppb (35) 0.15 ppb (2) N/A 3.0 μg/m3 (13) 35.0
 
April 16, 2021, 7 a.m. N/A N/A 2.8 ppb (3) N/A 2.6 ppb (3) N/A 39.0 ppb (37) N/A N/A 4.0 μg/m3 (17) 37.0
 
April 16, 2021, 6 a.m. N/A N/A 2.2 ppb (3) N/A 1.9 ppb (2) N/A 40.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
April 16, 2021, 5 a.m. N/A N/A 2.6 ppb (3) N/A 2.3 ppb (3) N/A 38.0 ppb (36) N/A N/A 6.0 μg/m3 (25) 36.0
 
April 16, 2021, 4 a.m. 2.2 ppb (3) 0.2 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (36) 0.14 ppb (2) N/A 6.0 μg/m3 (25) 36.0
 
April 16, 2021, 3 a.m. 2.4 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (35) 0.15 ppb (2) N/A 8.0 μg/m3 (34) 35.0
 
April 16, 2021, 2 a.m. 1.5 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (35) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 35.0
 
April 16, 2021, 1 a.m. 2.2 ppb (3) 0.1 ppb (1) 1.9 ppb (2) 2.0 ppb (2) 1.8 ppb (2) 0.0 ppb (0) 36.0 ppb (34) 0.15 ppb (2) N/A 7.0 μg/m3 (30) 34.0
 
April 16, 2021, midnight 2.6 ppb (3) 0.1 ppb (1) 2.4 ppb (3) 3.0 ppb (3) 2.2 ppb (3) 0.0 ppb (0) 35.0 ppb (33) 0.16 ppb (3) N/A 6.0 μg/m3 (25) 33.0
 
April 15, 2021, 11 p.m. 3.1 ppb (3) 0.1 ppb (1) 3.2 ppb (4) 3.0 ppb (3) 3.0 ppb (3) 0.0 ppb (0) 35.0 ppb (33) 0.16 ppb (3) N/A 5.0 μg/m3 (21) 33.0
 
April 15, 2021, 10 p.m. 3.2 ppb (4) 0.3 ppb (1) 3.3 ppb (4) 3.0 ppb (3) 2.9 ppb (3) 0.0 ppb (0) 37.0 ppb (35) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 35.0
 
April 15, 2021, 9 p.m. 2.6 ppb (3) 0.2 ppb (1) 2.5 ppb (3) 2.0 ppb (2) 2.3 ppb (3) 0.0 ppb (0) 38.0 ppb (36) 0.15 ppb (2) N/A 3.0 μg/m3 (13) 36.0
 
April 15, 2021, 8 p.m. 3.7 ppb (4) 0.5 ppb (1) 3.8 ppb (4) 3.0 ppb (3) 3.3 ppb (4) 0.0 ppb (0) 39.0 ppb (37) 0.16 ppb (3) N/A 4.0 μg/m3 (17) 37.0
 
April 15, 2021, 7 p.m. 3.7 ppb (4) 0.5 ppb (1) 3.7 ppb (4) 3.0 ppb (3) 3.1 ppb (3) 0.0 ppb (0) 40.0 ppb (38) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 38.0
 
April 15, 2021, 6 p.m. 2.8 ppb (3) 0.3 ppb (1) 2.7 ppb (3) 2.0 ppb (2) 2.4 ppb (3) 0.0 ppb (0) 41.0 ppb (38) 0.14 ppb (2) N/A 3.0 μg/m3 (13) 38.0
 
April 15, 2021, 5 p.m. 3.1 ppb (3) 0.4 ppb (1) 3.3 ppb (4) 3.0 ppb (3) 2.8 ppb (3) 0.0 ppb (0) 42.0 ppb (39) 0.15 ppb (2) N/A 3.0 μg/m3 (13) 39.0
 
April 15, 2021, 4 p.m. N/A N/A N/A N/A 4.7 ppb (5) N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
April 15, 2021, 3 p.m. N/A N/A N/A N/A 4.5 ppb (5) N/A N/A N/A N/A 2.0 μg/m3 (9) 9.0
 
April 15, 2021, 2 p.m. 4.0 ppb (4) 0.5 ppb (1) 6.1 ppb (6) 4.0 ppb (4) 5.7 ppb (6) 0.0 ppb (0) 39.0 ppb (37) 0.16 ppb (3) N/A 5.0 μg/m3 (21) 37.0
 
April 15, 2021, 1 p.m. 4.9 ppb (5) 0.6 ppb (1) 3.9 ppb (4) 4.0 ppb (4) 3.4 ppb (4) 0.0 ppb (0) 36.0 ppb (34) 0.18 ppb (3) N/A 8.0 μg/m3 (34) 34.0
 
April 15, 2021, noon 6.3 ppb (6) 0.7 ppb (1) 1.5 ppb (2) 6.0 ppb (6) 0.8 ppb (1) 0.0 ppb (0) 35.0 ppb (33) 0.18 ppb (3) N/A 5.0 μg/m3 (21) 33.0
 
April 15, 2021, 11 a.m. 6.8 ppb (7) 0.9 ppb (1) 1.7 ppb (2) 6.0 ppb (6) 0.9 ppb (1) 0.0 ppb (0) 31.0 ppb (29) 0.17 ppb (3) N/A 4.0 μg/m3 (17) 29.0
 
April 15, 2021, 10 a.m. 4.4 ppb (5) 0.6 ppb (1) 0.9 ppb (1) 4.0 ppb (4) 0.5 ppb (1) 0.0 ppb (0) N/A 0.17 ppb (3) N/A 3.0 μg/m3 (13) 13.0
 
April 15, 2021, 9 a.m. 3.3 ppb (4) 0.1 ppb (1) 0.6 ppb (1) 3.0 ppb (3) 0.3 ppb (1) 0.0 ppb (0) N/A 0.14 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
April 15, 2021, 8 a.m. 2.7 ppb (3) 0.1 ppb (1) 0.1 ppb (1) 3.0 ppb (3) 0.0 ppb (0) 0.0 ppb (0) 34.0 ppb (32) 0.14 ppb (2) N/A 7.0 μg/m3 (30) 32.0
 
April 15, 2021, 7 a.m. 2.3 ppb (3) 0.1 ppb (1) -0.1 ppb (0) 2.0 ppb (2) -0.1 ppb (0) 0.0 ppb (0) 37.0 ppb (35) 0.14 ppb (2) N/A 8.0 μg/m3 (34) 35.0
 
April 15, 2021, 6 a.m. 3.0 ppb (3) 0.1 ppb (1) 0.0 ppb (0) 3.0 ppb (3) -0.1 ppb (0) 0.0 ppb (0) 37.0 ppb (35) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 35.0
 
April 15, 2021, 5 a.m. 2.5 ppb (3) 0.1 ppb (1) -0.3 ppb (0) 2.0 ppb (2) -0.3 ppb (0) 0.0 ppb (0) 37.0 ppb (35) 0.14 ppb (2) N/A 7.0 μg/m3 (30) 35.0
 
April 15, 2021, 4 a.m. 2.1 ppb (2) 0.1 ppb (1) -0.5 ppb (0) 2.0 ppb (2) -0.5 ppb (0) 0.0 ppb (0) 41.0 ppb (38) 0.14 ppb (2) N/A 6.0 μg/m3 (25) 38.0
 
April 15, 2021, 3 a.m. 3.1 ppb (3) 0.1 ppb (1) -0.4 ppb (0) 3.0 ppb (3) -0.4 ppb (0) 0.0 ppb (0) 38.0 ppb (36) 0.16 ppb (3) N/A 5.0 μg/m3 (21) 36.0
 
April 15, 2021, 2 a.m. 3.3 ppb (4) 0.1 ppb (1) -0.5 ppb (0) 3.0 ppb (3) -0.5 ppb (0) 0.0 ppb (0) 38.0 ppb (36) 0.16 ppb (3) N/A 7.0 μg/m3 (30) 36.0
 
April 15, 2021, 1 a.m. 3.1 ppb (3) 0.1 ppb (1) -0.5 ppb (0) 3.0 ppb (3) -0.5 ppb (0) 0.0 ppb (0) 39.0 ppb (37) 0.16 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
April 15, 2021, midnight 3.2 ppb (4) 0.2 ppb (1) -0.4 ppb (0) 3.0 ppb (3) -0.6 ppb (0) 0.0 ppb (0) 39.0 ppb (37) 0.16 ppb (3) N/A 7.0 μg/m3 (30) 37.0
 
April 14, 2021, 11 p.m. 2.6 ppb (3) 0.1 ppb (1) -0.6 ppb (0) 3.0 ppb (3) -0.6 ppb (0) 0.0 ppb (0) 41.0 ppb (38) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 38.0
 
April 14, 2021, 10 p.m. 1.9 ppb (2) 0.2 ppb (1) -0.6 ppb (0) 2.0 ppb (2) -0.7 ppb (0) 0.0 ppb (0) 44.0 ppb (41) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 41.0
 
April 14, 2021, 9 p.m. 1.8 ppb (2) 0.2 ppb (1) -0.6 ppb (0) 2.0 ppb (2) -0.7 ppb (0) 0.0 ppb (0) 47.0 ppb (44) 0.16 ppb (3) N/A 5.0 μg/m3 (21) 44.0
 
April 14, 2021, 8 p.m. 1.8 ppb (2) 0.3 ppb (1) -0.6 ppb (0) 2.0 ppb (2) -0.8 ppb (0) 0.0 ppb (0) 47.0 ppb (44) 0.16 ppb (3) N/A 4.0 μg/m3 (17) 44.0
 
April 14, 2021, 7 p.m. 1.7 ppb (2) 0.3 ppb (1) -0.5 ppb (0) 1.0 ppb (1) -0.8 ppb (0) 0.0 ppb (0) 47.0 ppb (44) 0.15 ppb (2) N/A 2.0 μg/m3 (9) 44.0