ID: 878

AQSQID: 510870014

Site Name: Math & Science Ctr

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

Updated: Feb. 28, 2021, 6:32 a.m.

Location: Richmond (Hartman St), VA

Reporting: True, Located: True

Current AQI: 41.0

Richmond (Hartman St) VA, US: 37.55652, -77.40027

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Feb. 28, 2021, 5 a.m. N/A N/A N/A 8.0 ppb (8) N/A 0.0 ppb (0) 10.0 ppb (10) 0.26 ppb (4) N/A 9.8 μg/m3 (41) 41.0
 
Feb. 28, 2021, 4 a.m. N/A N/A N/A 11.0 ppb (11) N/A 0.0 ppb (0) 8.0 ppb (8) 0.29 ppb (4) N/A 11.1 μg/m3 (47) 47.0
 
Feb. 28, 2021, 3 a.m. N/A N/A N/A 12.0 ppb (12) N/A 0.0 ppb (0) 6.0 ppb (6) 0.32 ppb (4) N/A 10.2 μg/m3 (43) 43.0
 
Feb. 28, 2021, 2 a.m. N/A N/A N/A 13.0 ppb (13) N/A 0.0 ppb (0) 5.0 ppb (5) 0.31 ppb (4) N/A 7.6 μg/m3 (32) 32.0
 
Feb. 28, 2021, 1 a.m. N/A N/A N/A 12.0 ppb (12) N/A 0.0 ppb (0) 10.0 ppb (10) 0.31 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 28, 2021, midnight N/A N/A N/A 11.0 ppb (11) N/A 0.0 ppb (0) 16.0 ppb (15) 0.31 ppb (4) N/A 7.1 μg/m3 (30) 30.0
 
Feb. 27, 2021, 11 p.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 19.0 ppb (18) 0.25 ppb (3) N/A 6.3 μg/m3 (27) 27.0
 
Feb. 27, 2021, 10 p.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 20.0 ppb (19) 0.25 ppb (3) N/A 5.4 μg/m3 (23) 23.0
 
Feb. 27, 2021, 9 p.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 24.0 ppb (23) 0.21 ppb (3) N/A 5.0 μg/m3 (21) 23.0
 
Feb. 27, 2021, 8 p.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 26.0 ppb (25) 0.19 ppb (3) N/A 4.9 μg/m3 (21) 25.0
 
Feb. 27, 2021, 7 p.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 28.0 ppb (26) 0.2 ppb (3) N/A 4.5 μg/m3 (19) 26.0
 
Feb. 27, 2021, 6 p.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 30.0 ppb (28) 0.17 ppb (3) N/A 4.2 μg/m3 (18) 28.0
 
Feb. 27, 2021, 5 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (29) 0.17 ppb (3) N/A 3.7 μg/m3 (16) 29.0
 
Feb. 27, 2021, 4 p.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 29.0 ppb (27) 0.2 ppb (3) N/A 3.4 μg/m3 (15) 27.0
 
Feb. 27, 2021, 3 p.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 26.0 ppb (25) 0.2 ppb (3) N/A 3.4 μg/m3 (15) 25.0
 
Feb. 27, 2021, 2 p.m. N/A N/A N/A 10.0 ppb (10) N/A 0.0 ppb (0) 23.0 ppb (22) 0.21 ppb (3) N/A 3.3 μg/m3 (14) 22.0
 
Feb. 27, 2021, 1 p.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 28.0 ppb (26) 0.18 ppb (3) N/A 2.0 μg/m3 (9) 26.0
 
Feb. 27, 2021, noon N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (28) 0.18 ppb (3) N/A 4.3 μg/m3 (18) 28.0
 
Feb. 27, 2021, 11 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (32) 0.15 ppb (2) N/A 2.1 μg/m3 (9) 32.0
 
Feb. 27, 2021, 10 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (33) 0.15 ppb (2) N/A 2.8 μg/m3 (12) 33.0
 
Feb. 27, 2021, 9 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.14 ppb (2) N/A 3.2 μg/m3 (14) 14.0
 
Feb. 27, 2021, 8 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 36.0 ppb (34) N/A N/A 4.6 μg/m3 (20) 34.0
 
Feb. 27, 2021, 7 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A 36.0 ppb (34) N/A N/A 5.1 μg/m3 (22) 34.0
 
Feb. 27, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (36) 0.16 ppb (3) N/A 4.7 μg/m3 (20) 36.0
 
Feb. 27, 2021, 5 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (37) 0.15 ppb (2) N/A 4.9 μg/m3 (21) 37.0
 
Feb. 27, 2021, 4 a.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (37) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 37.0
 
Feb. 27, 2021, 3 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (35) 0.16 ppb (3) N/A 5.5 μg/m3 (23) 35.0
 
Feb. 27, 2021, 2 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (35) 0.16 ppb (3) N/A 5.4 μg/m3 (23) 35.0
 
Feb. 27, 2021, 1 a.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 36.0 ppb (34) 0.17 ppb (3) N/A 5.5 μg/m3 (23) 34.0
 
Feb. 27, 2021, midnight N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (35) 0.17 ppb (3) N/A 5.1 μg/m3 (22) 35.0
 
Feb. 26, 2021, 11 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (38) 0.16 ppb (3) N/A 4.3 μg/m3 (18) 38.0
 
Feb. 26, 2021, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A 1.0 ppb (2) 40.0 ppb (38) 0.16 ppb (3) N/A 4.8 μg/m3 (20) 38.0
 
Feb. 26, 2021, 9 p.m. N/A N/A N/A 4.0 ppb (4) N/A 1.0 ppb (2) 38.0 ppb (36) 0.16 ppb (3) N/A 5.4 μg/m3 (23) 36.0
 
Feb. 26, 2021, 8 p.m. N/A N/A N/A 4.0 ppb (4) N/A 1.0 ppb (2) 38.0 ppb (36) 0.16 ppb (3) N/A 4.8 μg/m3 (20) 36.0
 
Feb. 26, 2021, 7 p.m. N/A N/A N/A 4.0 ppb (4) N/A 1.0 ppb (2) 38.0 ppb (36) 0.16 ppb (3) N/A 4.8 μg/m3 (20) 36.0
 
Feb. 26, 2021, 6 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (35) 0.16 ppb (3) N/A 5.0 μg/m3 (21) 35.0
 
Feb. 26, 2021, 5 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (36) 0.16 ppb (3) N/A 4.7 μg/m3 (20) 36.0
 
Feb. 26, 2021, 4 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (37) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 37.0
 
Feb. 26, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.6 μg/m3 (24) 24.0
 
Feb. 26, 2021, 2 p.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 31.0 ppb (29) 0.2 ppb (3) N/A 6.3 μg/m3 (27) 29.0
 
Feb. 26, 2021, 1 p.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 26.0 ppb (25) 0.25 ppb (3) N/A 7.5 μg/m3 (32) 32.0
 
Feb. 26, 2021, noon N/A N/A N/A 16.0 ppb (16) N/A 0.0 ppb (0) 18.0 ppb (17) 0.28 ppb (4) N/A 8.6 μg/m3 (36) 36.0
 
Feb. 26, 2021, 11 a.m. N/A N/A N/A 14.0 ppb (14) N/A 0.0 ppb (0) 16.0 ppb (15) 0.28 ppb (4) N/A 7.5 μg/m3 (32) 32.0
 
Feb. 26, 2021, 10 a.m. N/A N/A N/A 11.0 ppb (11) N/A 0.0 ppb (0) 21.0 ppb (20) 0.26 ppb (4) N/A 6.9 μg/m3 (29) 29.0
 
Feb. 26, 2021, 9 a.m. N/A N/A N/A 12.0 ppb (12) N/A 0.0 ppb (0) 19.0 ppb (18) 0.24 ppb (3) N/A 7.1 μg/m3 (30) 30.0
 
Feb. 26, 2021, 8 a.m. N/A N/A N/A 15.0 ppb (15) N/A 0.0 ppb (0) 13.0 ppb (13) 0.31 ppb (4) N/A 7.5 μg/m3 (32) 32.0
 
Feb. 26, 2021, 7 a.m. N/A N/A N/A 16.0 ppb (16) N/A 0.0 ppb (0) 14.0 ppb (13) 0.29 ppb (4) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 26, 2021, 6 a.m. N/A N/A N/A 22.0 ppb (21) N/A 0.0 ppb (0) 6.0 ppb (6) 0.38 ppb (5) N/A 7.6 μg/m3 (32) 32.0
 
Feb. 26, 2021, 5 a.m. N/A N/A N/A 25.0 ppb (24) N/A 0.0 ppb (0) 3.0 ppb (3) 0.43 ppb (5) N/A 8.1 μg/m3 (34) 34.0
 
Feb. 26, 2021, 4 a.m. N/A N/A N/A 26.0 ppb (25) N/A 0.0 ppb (0) 4.0 ppb (4) 0.46 ppb (6) N/A 7.5 μg/m3 (32) 32.0
 
Feb. 26, 2021, 3 a.m. N/A N/A N/A 12.0 ppb (12) N/A 0.0 ppb (0) 21.0 ppb (20) 0.27 ppb (4) N/A 6.1 μg/m3 (26) 26.0
 
Feb. 26, 2021, 2 a.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 31.0 ppb (29) 0.25 ppb (3) N/A 5.6 μg/m3 (24) 29.0
 
Feb. 26, 2021, 1 a.m. N/A N/A N/A 8.0 ppb (8) N/A 0.0 ppb (0) 32.0 ppb (30) 0.25 ppb (3) N/A 4.9 μg/m3 (21) 30.0
 
Feb. 26, 2021, midnight N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 32.0 ppb (30) 0.27 ppb (4) N/A 4.3 μg/m3 (18) 30.0
 
Feb. 25, 2021, 11 p.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 34.0 ppb (32) 0.24 ppb (3) N/A 3.5 μg/m3 (15) 32.0
 
Feb. 25, 2021, 10 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (42) 0.18 ppb (3) N/A 3.7 μg/m3 (16) 42.0
 
Feb. 25, 2021, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 46.0 ppb (43) 0.18 ppb (3) N/A 3.6 μg/m3 (16) 43.0
 
Feb. 25, 2021, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (44) 0.18 ppb (3) N/A 3.6 μg/m3 (16) 44.0
 
Feb. 25, 2021, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 46.0 ppb (43) 0.17 ppb (3) N/A 3.7 μg/m3 (16) 43.0
 
Feb. 25, 2021, 6 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (42) 0.17 ppb (3) N/A 3.6 μg/m3 (16) 42.0
 
Feb. 25, 2021, 5 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.17 ppb (3) N/A 3.9 μg/m3 (17) 17.0
 
Feb. 25, 2021, 4 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.17 ppb (3) N/A 4.2 μg/m3 (18) 18.0
 
Feb. 25, 2021, 3 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.17 ppb (3) N/A 5.5 μg/m3 (23) 23.0
 
Feb. 25, 2021, 2 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (38) 0.18 ppb (3) N/A 6.7 μg/m3 (28) 38.0
 
Feb. 25, 2021, 1 p.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (38) 0.17 ppb (3) N/A 6.5 μg/m3 (28) 38.0
 
Feb. 25, 2021, noon N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (37) 0.18 ppb (3) N/A 5.1 μg/m3 (22) 37.0
 
Feb. 25, 2021, 11 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 36.0 ppb (34) 0.18 ppb (3) N/A 4.4 μg/m3 (19) 34.0
 
Feb. 25, 2021, 10 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 36.0 ppb (34) 0.19 ppb (3) N/A 5.6 μg/m3 (24) 34.0
 
Feb. 25, 2021, 9 a.m. N/A N/A N/A 14.0 ppb (14) N/A 0.0 ppb (0) 25.0 ppb (24) 0.24 ppb (3) N/A 7.6 μg/m3 (32) 32.0
 
Feb. 25, 2021, 8 a.m. N/A N/A N/A 10.0 ppb (10) N/A 0.0 ppb (0) 32.0 ppb (30) 0.21 ppb (3) N/A 8.1 μg/m3 (34) 34.0
 
Feb. 25, 2021, 7 a.m. N/A N/A N/A 13.0 ppb (13) N/A 0.0 ppb (0) 24.0 ppb (23) 0.22 ppb (3) N/A 8.6 μg/m3 (36) 36.0
 
Feb. 25, 2021, 6 a.m. N/A N/A N/A 12.0 ppb (12) N/A 0.0 ppb (0) 29.0 ppb (27) 0.21 ppb (3) N/A 8.5 μg/m3 (36) 36.0
 
Feb. 25, 2021, 5 a.m. N/A N/A N/A 8.0 ppb (8) N/A 0.0 ppb (0) 35.0 ppb (33) 0.21 ppb (3) N/A 7.0 μg/m3 (30) 33.0
 
Feb. 25, 2021, 4 a.m. N/A N/A N/A 8.0 ppb (8) N/A 0.0 ppb (0) 37.0 ppb (35) 0.2 ppb (3) N/A 5.7 μg/m3 (24) 35.0
 
Feb. 25, 2021, 3 a.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 37.0 ppb (35) 0.21 ppb (3) N/A 5.2 μg/m3 (22) 35.0
 
Feb. 24, 2021, 7 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 46.0 ppb (43) 0.17 ppb (3) N/A 3.2 μg/m3 (14) 43.0
 
Feb. 24, 2021, 6 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (42) 0.16 ppb (3) N/A 3.0 μg/m3 (13) 42.0
 
Feb. 24, 2021, 5 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 43.0 ppb (40) 0.17 ppb (3) N/A 3.1 μg/m3 (13) 40.0
 
Feb. 24, 2021, 4 p.m. N/A N/A N/A 8.0 ppb (8) N/A 2.0 ppb (3) 36.0 ppb (34) 0.19 ppb (3) N/A 3.6 μg/m3 (16) 34.0
 
Feb. 24, 2021, 3 p.m. N/A N/A N/A 11.0 ppb (11) N/A 1.0 ppb (2) 29.0 ppb (27) 0.2 ppb (3) N/A 5.1 μg/m3 (22) 27.0
 
Feb. 24, 2021, 2 p.m. N/A N/A N/A 13.0 ppb (13) N/A 1.0 ppb (2) 21.0 ppb (20) 0.24 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 24, 2021, 1 p.m. N/A N/A N/A 27.0 ppb (26) N/A 1.0 ppb (2) 5.0 ppb (5) 0.57 ppb (7) N/A 8.7 μg/m3 (37) 37.0
 
Feb. 24, 2021, noon N/A N/A N/A 21.0 ppb (20) N/A 0.0 ppb (0) 1.0 ppb (1) 0.66 ppb (8) N/A 6.3 μg/m3 (27) 27.0
 
Feb. 24, 2021, 11 a.m. N/A N/A N/A 20.0 ppb (19) N/A 0.0 ppb (0) 0.0 ppb (0) 0.88 ppb (11) N/A 5.7 μg/m3 (24) 24.0
 
Feb. 24, 2021, 10 a.m. N/A N/A N/A 29.0 ppb (28) N/A 0.0 ppb (0) 0.0 ppb (0) 1.28 ppb (15) N/A 6.3 μg/m3 (27) 28.0
 
Feb. 24, 2021, 9 a.m. N/A N/A N/A 26.0 ppb (25) N/A 0.0 ppb (0) N/A 0.52 ppb (6) N/A 5.0 μg/m3 (21) 25.0
 
Feb. 24, 2021, 8 a.m. N/A N/A N/A 26.0 ppb (25) N/A N/A 2.0 ppb (2) N/A N/A 4.9 μg/m3 (21) 25.0
 
Feb. 24, 2021, 7 a.m. N/A N/A N/A 27.0 ppb (26) N/A N/A 1.0 ppb (1) N/A N/A 5.2 μg/m3 (22) 26.0
 
Feb. 24, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 1.0 ppb (1) 0.69 ppb (8) N/A 6.1 μg/m3 (26) 26.0
 
Feb. 24, 2021, 5 a.m. N/A N/A N/A 34.0 ppb (33) N/A 0.0 ppb (0) 0.0 ppb (0) 0.78 ppb (10) N/A 6.2 μg/m3 (26) 33.0
 
Feb. 24, 2021, 4 a.m. N/A N/A N/A 30.0 ppb (29) N/A 0.0 ppb (0) 0.0 ppb (0) 0.7 ppb (8) N/A 6.2 μg/m3 (26) 29.0
 
Feb. 24, 2021, 3 a.m. N/A N/A N/A 36.0 ppb (34) N/A 0.0 ppb (0) 0.0 ppb (0) 0.84 ppb (10) N/A 7.5 μg/m3 (32) 34.0
 
Feb. 24, 2021, 2 a.m. N/A N/A N/A 39.0 ppb (37) N/A 0.0 ppb (0) 0.0 ppb (0) 0.83 ppb (10) N/A 6.9 μg/m3 (29) 37.0
 
Feb. 24, 2021, 1 a.m. N/A N/A N/A 28.0 ppb (27) N/A 0.0 ppb (0) 9.0 ppb (9) 0.53 ppb (6) N/A 4.4 μg/m3 (19) 27.0
 
Feb. 24, 2021, midnight N/A N/A N/A 11.0 ppb (11) N/A 0.0 ppb (0) 31.0 ppb (29) 0.25 ppb (3) N/A 3.0 μg/m3 (13) 29.0
 
Feb. 23, 2021, 11 p.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 39.0 ppb (37) 0.18 ppb (3) N/A 2.7 μg/m3 (12) 37.0
 
Feb. 23, 2021, 10 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 42.0 ppb (39) 0.16 ppb (3) N/A 2.8 μg/m3 (12) 39.0
 
Feb. 23, 2021, 9 p.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 40.0 ppb (38) 0.18 ppb (3) N/A 3.4 μg/m3 (15) 38.0
 
Feb. 23, 2021, 8 p.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 41.0 ppb (38) 0.17 ppb (3) N/A 3.4 μg/m3 (15) 38.0
 
Feb. 23, 2021, 7 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 41.0 ppb (38) 0.16 ppb (3) N/A 3.6 μg/m3 (16) 38.0
 
Feb. 23, 2021, 6 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (38) 0.16 ppb (3) N/A 3.7 μg/m3 (16) 38.0
 
Feb. 23, 2021, 5 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 39.0 ppb (37) 0.16 ppb (3) N/A 4.1 μg/m3 (18) 37.0
 
Feb. 23, 2021, 4 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 38.0 ppb (36) 0.15 ppb (2) N/A 4.4 μg/m3 (19) 36.0
 
Feb. 23, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.2 μg/m3 (22) 22.0
 
Feb. 23, 2021, 2 p.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 31.0 ppb (29) 0.27 ppb (4) N/A 6.5 μg/m3 (28) 29.0
 
Feb. 23, 2021, 1 p.m. N/A N/A N/A 13.0 ppb (13) N/A 0.0 ppb (0) 20.0 ppb (19) 0.32 ppb (4) N/A 7.3 μg/m3 (31) 31.0
 
Feb. 23, 2021, noon N/A N/A N/A 21.0 ppb (20) N/A 0.0 ppb (0) 11.0 ppb (11) 0.41 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
Feb. 23, 2021, 11 a.m. N/A N/A N/A 22.0 ppb (21) N/A 0.0 ppb (0) 10.0 ppb (10) 0.35 ppb (4) N/A 6.5 μg/m3 (28) 28.0
 
Feb. 23, 2021, 10 a.m. N/A N/A N/A 10.0 ppb (10) N/A 0.0 ppb (0) 20.0 ppb (19) 0.27 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
Feb. 23, 2021, 9 a.m. N/A N/A N/A 10.0 ppb (10) N/A 0.0 ppb (0) 20.0 ppb (19) 0.29 ppb (4) N/A 5.6 μg/m3 (24) 24.0
 
Feb. 23, 2021, 8 a.m. N/A N/A N/A 8.0 ppb (8) N/A 0.0 ppb (0) 21.0 ppb (20) 0.24 ppb (3) N/A 5.2 μg/m3 (22) 22.0
 
Feb. 23, 2021, 7 a.m. N/A N/A N/A 8.0 ppb (8) N/A 0.0 ppb (0) 22.0 ppb (21) 0.24 ppb (3) N/A 4.9 μg/m3 (21) 21.0
 
Feb. 23, 2021, 6 a.m. N/A N/A N/A 11.0 ppb (11) N/A 0.0 ppb (0) 15.0 ppb (14) 0.29 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
Feb. 23, 2021, 5 a.m. N/A N/A N/A 11.0 ppb (11) N/A 0.0 ppb (0) 16.0 ppb (15) 0.28 ppb (4) N/A 5.1 μg/m3 (22) 22.0
 
Feb. 23, 2021, 4 a.m. N/A N/A N/A 13.0 ppb (13) N/A 0.0 ppb (0) 14.0 ppb (13) 0.3 ppb (4) N/A 5.5 μg/m3 (23) 23.0
 
Feb. 23, 2021, 3 a.m. N/A N/A N/A 15.0 ppb (15) N/A 0.0 ppb (0) 14.0 ppb (13) 0.35 ppb (4) N/A 4.8 μg/m3 (20) 20.0
 
Feb. 23, 2021, 2 a.m. N/A N/A N/A 15.0 ppb (15) N/A 0.0 ppb (0) 16.0 ppb (15) 0.34 ppb (4) N/A 4.1 μg/m3 (18) 18.0
 
Feb. 23, 2021, 1 a.m. N/A N/A N/A 12.0 ppb (12) N/A 0.0 ppb (0) 20.0 ppb (19) 0.33 ppb (4) N/A 3.9 μg/m3 (17) 19.0
 
Feb. 23, 2021, midnight N/A N/A N/A 13.0 ppb (13) N/A 0.0 ppb (0) 21.0 ppb (20) 0.32 ppb (4) N/A 3.9 μg/m3 (17) 20.0
 
Feb. 22, 2021, 11 p.m. N/A N/A N/A 13.0 ppb (13) N/A 0.0 ppb (0) 22.0 ppb (21) 0.32 ppb (4) N/A 3.3 μg/m3 (14) 21.0
 
Feb. 22, 2021, 10 p.m. N/A N/A N/A 8.0 ppb (8) N/A 0.0 ppb (0) 28.0 ppb (26) 0.28 ppb (4) N/A 2.9 μg/m3 (13) 26.0
 
Feb. 22, 2021, 9 p.m. N/A N/A N/A 10.0 ppb (10) N/A 0.0 ppb (0) 27.0 ppb (25) 0.28 ppb (4) N/A 3.2 μg/m3 (14) 25.0
 
Feb. 22, 2021, 8 p.m. N/A N/A N/A 14.0 ppb (14) N/A 0.0 ppb (0) 23.0 ppb (22) 0.3 ppb (4) N/A 4.2 μg/m3 (18) 22.0
 
Feb. 22, 2021, 7 p.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 28.0 ppb (26) 0.26 ppb (4) N/A 3.6 μg/m3 (16) 26.0
 
Feb. 22, 2021, 6 p.m. N/A N/A N/A 10.0 ppb (10) N/A 0.0 ppb (0) 27.0 ppb (25) 0.25 ppb (3) N/A 5.3 μg/m3 (23) 25.0
 
Feb. 22, 2021, 5 p.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 27.0 ppb (25) 0.23 ppb (3) N/A 10.9 μg/m3 (46) 46.0
 
Feb. 22, 2021, 4 p.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 30.0 ppb (28) 0.22 ppb (3) N/A 10.3 μg/m3 (43) 43.0
 
Feb. 22, 2021, 3 p.m. N/A N/A N/A 12.0 ppb (12) N/A 1.0 ppb (2) 29.0 ppb (27) 0.29 ppb (4) N/A 9.6 μg/m3 (40) 40.0
 
Feb. 22, 2021, 2 p.m. N/A N/A N/A 9.0 ppb (9) N/A 1.0 ppb (2) 31.0 ppb (29) 0.25 ppb (3) N/A 8.7 μg/m3 (37) 37.0
 
Feb. 22, 2021, 1 p.m. N/A N/A N/A 7.0 ppb (7) N/A 1.0 ppb (2) 33.0 ppb (31) 0.23 ppb (3) N/A 7.9 μg/m3 (33) 33.0
 
Feb. 22, 2021, noon N/A N/A N/A 7.0 ppb (7) N/A 1.0 ppb (2) 33.0 ppb (31) 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
Feb. 22, 2021, 11 a.m. N/A N/A N/A 6.0 ppb (6) N/A 1.0 ppb (2) 34.0 ppb (32) 0.23 ppb (3) N/A 10.1 μg/m3 (43) 43.0
 
Feb. 22, 2021, 10 a.m. N/A N/A N/A 7.0 ppb (7) N/A 2.0 ppb (3) 33.0 ppb (31) 0.21 ppb (3) N/A 10.4 μg/m3 (44) 44.0
 
Feb. 22, 2021, 9 a.m. N/A N/A N/A 6.0 ppb (6) N/A 1.0 ppb (2) 34.0 ppb (32) 0.18 ppb (3) N/A 11.5 μg/m3 (48) 48.0
 
Feb. 22, 2021, 8 a.m. N/A N/A N/A 5.0 ppb (5) N/A 1.0 ppb (2) 36.0 ppb (34) 0.19 ppb (3) N/A 11.8 μg/m3 (50) 50.0
 
Feb. 22, 2021, 7 a.m. N/A N/A N/A 4.0 ppb (4) N/A 1.0 ppb (2) 38.0 ppb (36) 0.18 ppb (3) N/A 12.7 μg/m3 (53) 53.0
 
Feb. 22, 2021, 6 a.m. N/A N/A N/A 4.0 ppb (4) N/A 1.0 ppb (2) 38.0 ppb (36) 0.19 ppb (3) N/A 13.6 μg/m3 (55) 55.0
 
Feb. 22, 2021, 5 a.m. N/A N/A N/A 6.0 ppb (6) N/A 2.0 ppb (3) 37.0 ppb (35) 0.22 ppb (3) N/A 14.5 μg/m3 (57) 57.0
 
Feb. 22, 2021, 4 a.m. N/A N/A N/A 6.0 ppb (6) N/A 1.0 ppb (2) 36.0 ppb (34) 0.23 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
Feb. 22, 2021, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 39.0 ppb (37) 0.21 ppb (3) N/A 12.6 μg/m3 (53) 53.0
 
Feb. 22, 2021, 2 a.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (38) 0.2 ppb (3) N/A 10.6 μg/m3 (45) 45.0
 
Feb. 22, 2021, 1 a.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 37.0 ppb (35) 0.22 ppb (3) N/A 9.8 μg/m3 (41) 41.0
 
Feb. 22, 2021, midnight N/A N/A N/A 10.0 ppb (10) N/A 0.0 ppb (0) 33.0 ppb (31) 0.25 ppb (3) N/A 10.3 μg/m3 (43) 43.0
 
Feb. 21, 2021, 11 p.m. N/A N/A N/A 9.0 ppb (9) N/A 1.0 ppb (2) 35.0 ppb (33) 0.25 ppb (3) N/A 9.8 μg/m3 (41) 41.0
 
Feb. 21, 2021, 10 p.m. N/A N/A N/A 7.0 ppb (7) N/A 2.0 ppb (3) 40.0 ppb (38) 0.23 ppb (3) N/A 9.1 μg/m3 (38) 38.0
 
Feb. 21, 2021, 9 p.m. N/A N/A N/A 4.0 ppb (4) N/A 1.0 ppb (2) 45.0 ppb (42) 0.19 ppb (3) N/A 8.7 μg/m3 (37) 42.0
 
Feb. 21, 2021, 8 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (42) 0.2 ppb (3) N/A 10.1 μg/m3 (43) 43.0
 
Feb. 21, 2021, 7 p.m. N/A N/A N/A 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (42) 0.19 ppb (3) N/A 9.6 μg/m3 (40) 42.0
 
Feb. 21, 2021, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (43) 0.18 ppb (3) N/A 8.9 μg/m3 (38) 43.0
 
Feb. 21, 2021, 5 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (42) 0.17 ppb (3) N/A 9.2 μg/m3 (39) 42.0
 
Feb. 21, 2021, 4 p.m. N/A N/A N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (42) 0.17 ppb (3) N/A 9.9 μg/m3 (42) 42.0
 
Feb. 21, 2021, 3 p.m. N/A N/A N/A 3.0 ppb (3) N/A 1.0 ppb (2) 44.0 ppb (41) 0.17 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
Feb. 21, 2021, 2 p.m. N/A N/A N/A 5.0 ppb (5) N/A 1.0 ppb (2) 40.0 ppb (38) 0.18 ppb (3) N/A 13.8 μg/m3 (55) 55.0
 
Feb. 21, 2021, 1 p.m. N/A N/A N/A 10.0 ppb (10) N/A 1.0 ppb (2) 32.0 ppb (30) 0.22 ppb (3) N/A 16.1 μg/m3 (60) 60.0
 
Feb. 21, 2021, noon N/A N/A N/A 24.0 ppb (23) N/A 0.0 ppb (0) 9.0 ppb (9) 0.41 ppb (5) N/A 16.3 μg/m3 (60) 60.0
 
Feb. 21, 2021, 11 a.m. N/A N/A N/A 23.0 ppb (22) N/A 0.0 ppb (0) 6.0 ppb (6) 0.43 ppb (5) N/A 15.8 μg/m3 (59) 59.0
 
Feb. 21, 2021, 10 a.m. N/A N/A N/A 25.0 ppb (24) N/A 0.0 ppb (0) 5.0 ppb (5) 0.35 ppb (4) N/A 17.8 μg/m3 (63) 63.0
 
Feb. 21, 2021, 9 a.m. N/A N/A N/A 24.0 ppb (23) N/A 0.0 ppb (0) N/A 0.37 ppb (5) N/A 18.1 μg/m3 (64) 64.0
 
Feb. 21, 2021, 8 a.m. N/A N/A N/A 15.0 ppb (15) N/A N/A 14.0 ppb (13) N/A N/A 19.0 μg/m3 (66) 66.0
 
Feb. 21, 2021, 7 a.m. N/A N/A N/A 16.0 ppb (16) N/A N/A 16.0 ppb (15) N/A N/A 13.6 μg/m3 (55) 55.0
 
Feb. 21, 2021, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 15.0 ppb (14) 0.25 ppb (3) N/A 14.3 μg/m3 (56) 56.0
 
Feb. 21, 2021, 5 a.m. N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 28.0 ppb (26) 0.2 ppb (3) N/A 12.3 μg/m3 (52) 52.0
 
Feb. 21, 2021, 4 a.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 35.0 ppb (33) 0.19 ppb (3) N/A 10.5 μg/m3 (44) 44.0
 
Feb. 21, 2021, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A 0.0 ppb (0) 38.0 ppb (36) 0.18 ppb (3) N/A 9.5 μg/m3 (40) 40.0
 
Feb. 21, 2021, 2 a.m. N/A N/A N/A 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (38) 0.17 ppb (3) N/A 9.1 μg/m3 (38) 38.0
 
Feb. 21, 2021, 1 a.m. N/A N/A N/A 7.0 ppb (7) N/A 0.0 ppb (0) 35.0 ppb (33) 0.2 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
Feb. 21, 2021, midnight N/A N/A N/A 9.0 ppb (9) N/A 0.0 ppb (0) 33.0 ppb (31) 0.23 ppb (3) N/A 8.6 μg/m3 (36) 36.0
 
Feb. 20, 2021, 11 p.m. N/A N/A N/A 6.0 ppb (6) N/A 0.0 ppb (0) 38.0 ppb (36) 0.18 ppb (3) N/A 6.8 μg/m3 (29) 36.0