AQSQID: 090030025

Site Name: Hartford-Huntley

Location: Hartford (Downtown), CT

Reporting: True, Located: True

Current AQI: 33.0

Hartford (Downtown) CT, US: 41.771444, -72.679923

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 5, 2020, 7 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A N/A 15.0 μg/m3 (14) 7.9 μg/m3 (33) 33.0
 
April 5, 2020, 6 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.19 ppb (2) 16.0 μg/m3 (15) 8.5 μg/m3 (35) 35.0
 
April 5, 2020, 5 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.21 ppb (2) 17.0 μg/m3 (15) 9.2 μg/m3 (38) 38.0
 
April 5, 2020, 4 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.23 ppb (3) 16.0 μg/m3 (15) 8.3 μg/m3 (35) 35.0
 
April 5, 2020, 3 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.26 ppb (3) 12.0 μg/m3 (11) 7.0 μg/m3 (29) 29.0
 
April 5, 2020, 2 a.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.3 ppb (3) 11.0 μg/m3 (10) 6.9 μg/m3 (29) 29.0
 
April 5, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A N/A 0.36 ppb (4) 13.0 μg/m3 (12) 6.6 μg/m3 (28) 28.0
 
April 5, 2020, midnight N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.28 ppb (3) 9.0 μg/m3 (8) 4.6 μg/m3 (19) 19.0
 
April 4, 2020, 11 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.23 ppb (3) 7.0 μg/m3 (6) 4.1 μg/m3 (17) 17.0
 
April 4, 2020, 10 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.2 ppb (2) 8.0 μg/m3 (7) 4.0 μg/m3 (17) 17.0
 
April 4, 2020, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) 7.0 μg/m3 (6) 3.9 μg/m3 (16) 16.0
 
April 4, 2020, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.18 ppb (2) 7.0 μg/m3 (6) 3.9 μg/m3 (16) 16.0
 
April 4, 2020, 7 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) 8.0 μg/m3 (7) 3.8 μg/m3 (16) 16.0
 
April 4, 2020, 6 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) 7.0 μg/m3 (6) 4.0 μg/m3 (17) 17.0
 
April 4, 2020, 5 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) 7.0 μg/m3 (6) 4.0 μg/m3 (17) 17.0
 
April 4, 2020, 4 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 6.0 μg/m3 (5) 3.6 μg/m3 (15) 15.0
 
April 4, 2020, 3 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 5.0 μg/m3 (5) 2.7 μg/m3 (11) 11.0
 
April 4, 2020, 2 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 3.0 μg/m3 (3) 1.8 μg/m3 (8) 8.0
 
April 4, 2020, 1 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 3.0 μg/m3 (3) 1.1 μg/m3 (5) 5.0
 
April 4, 2020, noon N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) 2.0 μg/m3 (2) 0.9 μg/m3 (4) 4.0
 
April 4, 2020, 11 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 2.0 μg/m3 (2) 0.7 μg/m3 (3) 3.0
 
April 4, 2020, 10 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 1.0 μg/m3 (1) 0.7 μg/m3 (3) 3.0
 
April 4, 2020, 9 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) 1.0 μg/m3 (1) 0.6 μg/m3 (2) 2.0
 
April 4, 2020, 8 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 0.14 ppb (2) 1.0 μg/m3 (1) 0.5 μg/m3 (2) 2.0
 
April 4, 2020, 7 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A N/A N/A 1.0 μg/m3 (1) 0.5 μg/m3 (2) 2.0
 
April 4, 2020, 6 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) 1.0 μg/m3 (1) 0.5 μg/m3 (2) 2.0
 
April 4, 2020, 5 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 2.0 μg/m3 (2) 1.1 μg/m3 (5) 5.0
 
April 4, 2020, 4 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) 2.0 μg/m3 (2) 1.1 μg/m3 (5) 5.0
 
April 4, 2020, 3 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) 2.0 μg/m3 (2) 1.2 μg/m3 (5) 5.0
 
April 4, 2020, 2 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) 2.0 μg/m3 (2) 1.2 μg/m3 (5) 5.0
 
April 4, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A N/A 0.17 ppb (2) 2.0 μg/m3 (2) 1.1 μg/m3 (5) 5.0
 
April 4, 2020, midnight N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 1.0 μg/m3 (1) 0.6 μg/m3 (2) 2.0
 
April 3, 2020, 11 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) 1.0 μg/m3 (1) 0.6 μg/m3 (2) 2.0
 
April 3, 2020, 10 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) 2.0 μg/m3 (2) 0.6 μg/m3 (2) 2.0
 
April 3, 2020, 9 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) 2.0 μg/m3 (2) 0.7 μg/m3 (3) 3.0
 
April 3, 2020, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) 1.0 μg/m3 (1) 0.6 μg/m3 (2) 3.0
 
April 3, 2020, 7 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (2) 2.0 μg/m3 (2) 0.6 μg/m3 (2) 2.0
 
April 3, 2020, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (2) 2.0 μg/m3 (2) 0.9 μg/m3 (4) 4.0
 
April 3, 2020, 5 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) 1.0 μg/m3 (1) 1.0 μg/m3 (4) 4.0
 
April 3, 2020, 4 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) 1.0 μg/m3 (1) 0.8 μg/m3 (3) 3.0
 
April 3, 2020, 3 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.16 ppb (2) 1.0 μg/m3 (1) 0.8 μg/m3 (3) 3.0
 
April 3, 2020, 2 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) 1.0 μg/m3 (1) 1.0 μg/m3 (4) 4.0
 
April 3, 2020, 1 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.19 ppb (2) 2.0 μg/m3 (2) 1.2 μg/m3 (5) 5.0
 
April 3, 2020, noon N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.19 ppb (2) 1.0 μg/m3 (1) 0.6 μg/m3 (2) 4.0
 
April 3, 2020, 11 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.19 ppb (2) 1.0 μg/m3 (1) 0.5 μg/m3 (2) 5.0
 
April 3, 2020, 10 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.18 ppb (2) 1.0 μg/m3 (1) 0.6 μg/m3 (2) 5.0
 
April 3, 2020, 9 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.16 ppb (2) 0.0 μg/m3 (0) 0.4 μg/m3 (2) 3.0
 
April 3, 2020, 8 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.15 ppb (2) 2.0 μg/m3 (2) 1.0 μg/m3 (4) 5.0
 
April 3, 2020, 7 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A N/A 0.0 μg/m3 (0) 0.3 μg/m3 (1) 2.0
 
April 3, 2020, 6 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 0.0 μg/m3 (0) 0.4 μg/m3 (2) 2.0
 
April 3, 2020, 5 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) 0.0 μg/m3 (0) 0.3 μg/m3 (1) 2.0
 
April 3, 2020, 4 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) 0.0 μg/m3 (0) 0.4 μg/m3 (2) 2.0
 
April 3, 2020, 3 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) 1.0 μg/m3 (1) 0.6 μg/m3 (2) 2.0
 
April 3, 2020, 2 a.m. N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 0.15 ppb (2) 1.0 μg/m3 (1) 0.6 μg/m3 (2) 2.0
 
April 3, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A N/A 0.17 ppb (2) 1.0 μg/m3 (1) 0.9 μg/m3 (4) 4.0
 
April 3, 2020, midnight N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 0.17 ppb (2) 2.0 μg/m3 (2) 1.5 μg/m3 (6) 6.0
 
April 2, 2020, 11 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 0.18 ppb (2) 5.0 μg/m3 (5) 2.2 μg/m3 (9) 9.0
 
April 2, 2020, 10 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) 13.0 μg/m3 (12) 3.2 μg/m3 (13) 13.0
 
April 2, 2020, 9 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 15.0 μg/m3 (14) 3.3 μg/m3 (14) 14.0
 
April 2, 2020, 8 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 18.0 μg/m3 (16) 3.5 μg/m3 (15) 16.0
 
April 2, 2020, 7 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 19.0 μg/m3 (17) 3.1 μg/m3 (13) 17.0
 
April 2, 2020, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 21.0 μg/m3 (19) 3.2 μg/m3 (13) 19.0
 
April 2, 2020, 5 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 19.0 μg/m3 (17) 2.9 μg/m3 (12) 17.0
 
April 2, 2020, 4 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) 14.0 μg/m3 (13) 2.6 μg/m3 (11) 13.0
 
April 2, 2020, 3 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 18.0 μg/m3 (16) 3.9 μg/m3 (16) 16.0
 
April 2, 2020, 2 p.m. N/A N/A N/A 1.0 ppb (1) N/A N/A N/A 0.16 ppb (2) 20.0 μg/m3 (18) 2.9 μg/m3 (12) 18.0
 
April 2, 2020, 1 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.18 ppb (2) 14.0 μg/m3 (13) 2.2 μg/m3 (9) 13.0
 
April 2, 2020, noon N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.17 ppb (2) 7.0 μg/m3 (6) 2.0 μg/m3 (8) 8.0
 
April 2, 2020, 11 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.2 ppb (2) 7.0 μg/m3 (6) 2.4 μg/m3 (10) 10.0
 
April 2, 2020, 10 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.19 ppb (2) 7.0 μg/m3 (6) 3.2 μg/m3 (13) 13.0
 
April 2, 2020, 9 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.17 ppb (2) 4.0 μg/m3 (4) 3.3 μg/m3 (14) 14.0
 
April 2, 2020, 8 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.16 ppb (2) 6.0 μg/m3 (5) 3.5 μg/m3 (15) 15.0
 
April 2, 2020, 7 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A N/A 6.0 μg/m3 (5) 3.7 μg/m3 (15) 15.0
 
April 2, 2020, 6 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 7.0 μg/m3 (6) 4.1 μg/m3 (17) 17.0
 
April 2, 2020, 5 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) 8.0 μg/m3 (7) 4.4 μg/m3 (18) 18.0
 
April 2, 2020, 4 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 9.0 μg/m3 (8) 4.8 μg/m3 (20) 20.0
 
April 2, 2020, 3 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 9.0 μg/m3 (8) 5.1 μg/m3 (21) 21.0
 
April 2, 2020, 2 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.19 ppb (2) 9.0 μg/m3 (8) 5.3 μg/m3 (22) 22.0
 
April 2, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A N/A 0.21 ppb (2) 10.0 μg/m3 (9) 4.9 μg/m3 (20) 20.0
 
April 2, 2020, midnight N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.2 ppb (2) 9.0 μg/m3 (8) 4.6 μg/m3 (19) 19.0
 
April 1, 2020, 11 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.21 ppb (2) 9.0 μg/m3 (8) 4.3 μg/m3 (18) 18.0
 
April 1, 2020, 10 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.18 ppb (2) 8.0 μg/m3 (7) 4.0 μg/m3 (17) 17.0
 
April 1, 2020, 9 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) 7.0 μg/m3 (6) 4.1 μg/m3 (17) 17.0
 
April 1, 2020, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) 9.0 μg/m3 (8) 4.3 μg/m3 (18) 18.0
 
April 1, 2020, 7 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.19 ppb (2) 10.0 μg/m3 (9) 4.3 μg/m3 (18) 18.0
 
April 1, 2020, 6 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) 10.0 μg/m3 (9) 4.4 μg/m3 (18) 18.0
 
April 1, 2020, 5 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) 11.0 μg/m3 (10) 4.6 μg/m3 (19) 19.0
 
April 1, 2020, 4 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A N/A 13.0 μg/m3 (12) 4.6 μg/m3 (19) 19.0
 
April 1, 2020, 3 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.19 ppb (2) 11.0 μg/m3 (10) 5.0 μg/m3 (21) 21.0
 
April 1, 2020, 2 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (2) 10.0 μg/m3 (9) 4.9 μg/m3 (20) 20.0
 
April 1, 2020, 1 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (2) 11.0 μg/m3 (10) 5.6 μg/m3 (23) 23.0
 
April 1, 2020, noon N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.22 ppb (2) 12.0 μg/m3 (11) 6.6 μg/m3 (28) 28.0
 
April 1, 2020, 11 a.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.28 ppb (3) 14.0 μg/m3 (13) 7.3 μg/m3 (30) 30.0
 
April 1, 2020, 10 a.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.27 ppb (3) 14.0 μg/m3 (13) 7.3 μg/m3 (30) 30.0
 
April 1, 2020, 9 a.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.19 ppb (2) 12.0 μg/m3 (11) 7.3 μg/m3 (30) 30.0
 
April 1, 2020, 8 a.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.2 ppb (2) 14.0 μg/m3 (13) 8.8 μg/m3 (37) 37.0
 
April 1, 2020, 7 a.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A N/A 16.0 μg/m3 (15) 9.4 μg/m3 (39) 39.0
 
April 1, 2020, 6 a.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.22 ppb (2) 16.0 μg/m3 (15) 8.7 μg/m3 (36) 36.0
 
April 1, 2020, 5 a.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.2 ppb (2) 16.0 μg/m3 (15) 8.5 μg/m3 (35) 35.0
 
April 1, 2020, 4 a.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.2 ppb (2) 16.0 μg/m3 (15) 8.2 μg/m3 (34) 34.0
 
April 1, 2020, 3 a.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.24 ppb (3) 17.0 μg/m3 (15) 7.8 μg/m3 (32) 32.0
 
April 1, 2020, 2 a.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.29 ppb (3) 14.0 μg/m3 (13) 7.4 μg/m3 (31) 31.0
 
April 1, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A N/A 0.29 ppb (3) 12.0 μg/m3 (11) 7.3 μg/m3 (30) 30.0
 
April 1, 2020, midnight N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.25 ppb (3) 10.0 μg/m3 (9) 6.4 μg/m3 (27) 27.0
 
March 31, 2020, 11 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.22 ppb (2) 9.0 μg/m3 (8) 5.6 μg/m3 (23) 23.0
 
March 31, 2020, 10 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.21 ppb (2) 10.0 μg/m3 (9) 5.4 μg/m3 (23) 23.0
 
March 31, 2020, 9 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.18 ppb (2) 11.0 μg/m3 (10) 5.3 μg/m3 (22) 22.0
 
March 31, 2020, 8 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) 13.0 μg/m3 (12) 5.4 μg/m3 (23) 23.0
 
March 31, 2020, 7 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.18 ppb (2) 11.0 μg/m3 (10) 5.6 μg/m3 (23) 23.0
 
March 31, 2020, 6 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.28 ppb (3) 10.0 μg/m3 (9) 5.7 μg/m3 (24) 24.0
 
March 31, 2020, 5 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) 11.0 μg/m3 (10) 5.4 μg/m3 (23) 23.0
 
March 31, 2020, 4 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.21 ppb (2) 12.0 μg/m3 (11) 5.5 μg/m3 (23) 23.0
 
March 31, 2020, 3 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.19 ppb (2) N/A N/A 3.0
 
March 31, 2020, 2 p.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.18 ppb (2) 10.0 μg/m3 (9) 5.2 μg/m3 (22) 22.0
 
March 31, 2020, 1 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.18 ppb (2) 8.0 μg/m3 (7) 4.6 μg/m3 (19) 19.0
 
March 31, 2020, noon N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.18 ppb (2) 6.0 μg/m3 (5) 3.7 μg/m3 (15) 15.0
 
March 31, 2020, 11 a.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.21 ppb (2) 5.0 μg/m3 (5) 3.1 μg/m3 (13) 13.0
 
March 31, 2020, 10 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (2) 3.0 μg/m3 (3) 2.3 μg/m3 (10) 10.0
 
March 31, 2020, 9 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.17 ppb (2) 2.0 μg/m3 (2) 1.7 μg/m3 (7) 7.0
 
March 31, 2020, 8 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.16 ppb (2) 2.0 μg/m3 (2) 1.5 μg/m3 (6) 6.0
 
March 31, 2020, 7 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A N/A 2.0 μg/m3 (2) 1.5 μg/m3 (6) 6.0
 
March 31, 2020, 6 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.16 ppb (2) 2.0 μg/m3 (2) 1.3 μg/m3 (5) 5.0
 
March 31, 2020, 5 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.18 ppb (2) 3.0 μg/m3 (3) 1.5 μg/m3 (6) 6.0
 
March 31, 2020, 4 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.17 ppb (2) 3.0 μg/m3 (3) 1.4 μg/m3 (6) 6.0
 
March 31, 2020, 3 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.2 ppb (2) 3.0 μg/m3 (3) 2.1 μg/m3 (9) 9.0
 
March 31, 2020, 2 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.2 ppb (2) 3.0 μg/m3 (3) 1.9 μg/m3 (8) 8.0
 
March 31, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A N/A 0.19 ppb (2) 4.0 μg/m3 (4) 2.5 μg/m3 (10) 10.0
 
March 31, 2020, midnight N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (2) 6.0 μg/m3 (5) 3.8 μg/m3 (16) 16.0
 
March 30, 2020, 11 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.21 ppb (2) 6.0 μg/m3 (5) 4.0 μg/m3 (17) 17.0
 
March 30, 2020, 10 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.21 ppb (2) 7.0 μg/m3 (6) 4.1 μg/m3 (17) 17.0
 
March 30, 2020, 9 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.2 ppb (2) 6.0 μg/m3 (5) 3.6 μg/m3 (15) 15.0
 
March 30, 2020, 8 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.19 ppb (2) 6.0 μg/m3 (5) 3.4 μg/m3 (14) 14.0
 
March 30, 2020, 7 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.2 ppb (2) 5.0 μg/m3 (5) 3.1 μg/m3 (13) 13.0
 
March 30, 2020, 6 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.18 ppb (2) 5.0 μg/m3 (5) 3.3 μg/m3 (14) 14.0
 
March 30, 2020, 5 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.19 ppb (2) 5.0 μg/m3 (5) 2.6 μg/m3 (11) 11.0
 
March 30, 2020, 4 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.18 ppb (2) 4.0 μg/m3 (4) 1.9 μg/m3 (8) 8.0
 
March 30, 2020, 3 p.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.2 ppb (2) 3.0 μg/m3 (3) 1.7 μg/m3 (7) 7.0
 
March 30, 2020, 2 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.19 ppb (2) 3.0 μg/m3 (3) 1.5 μg/m3 (6) 6.0
 
March 30, 2020, 1 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.18 ppb (2) 2.0 μg/m3 (2) 1.4 μg/m3 (6) 6.0
 
March 30, 2020, noon N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.18 ppb (2) 2.0 μg/m3 (2) 1.6 μg/m3 (7) 7.0
 
March 30, 2020, 11 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.19 ppb (2) 4.0 μg/m3 (4) 2.1 μg/m3 (9) 9.0
 
March 30, 2020, 10 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.18 ppb (2) 4.0 μg/m3 (4) 2.9 μg/m3 (12) 12.0
 
March 30, 2020, 9 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.16 ppb (2) 4.0 μg/m3 (4) 3.2 μg/m3 (13) 13.0
 
March 30, 2020, 8 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.14 ppb (2) 5.0 μg/m3 (5) 3.5 μg/m3 (15) 15.0
 
March 30, 2020, 7 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A N/A 4.0 μg/m3 (4) 2.9 μg/m3 (12) 12.0
 
March 30, 2020, 6 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.15 ppb (2) 2.0 μg/m3 (2) 1.8 μg/m3 (8) 8.0
 
March 30, 2020, 5 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.17 ppb (2) 2.0 μg/m3 (2) 1.4 μg/m3 (6) 6.0
 
March 30, 2020, 4 a.m. N/A N/A N/A 2.0 ppb (2) N/A N/A N/A 0.16 ppb (2) 2.0 μg/m3 (2) 1.2 μg/m3 (5) 5.0
 
March 30, 2020, 3 a.m. N/A N/A N/A 3.0 ppb (3) N/A N/A N/A 0.18 ppb (2) 3.0 μg/m3 (3) 1.6 μg/m3 (7) 7.0
 
March 30, 2020, 2 a.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.18 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 8.0
 
March 30, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A N/A 0.18 ppb (2) 3.0 μg/m3 (3) 1.7 μg/m3 (7) 7.0
 
March 30, 2020, midnight N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.18 ppb (2) 4.0 μg/m3 (4) 2.1 μg/m3 (9) 9.0
 
March 29, 2020, 11 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.2 ppb (2) 4.0 μg/m3 (4) 2.5 μg/m3 (10) 10.0
 
March 29, 2020, 10 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.2 ppb (2) 4.0 μg/m3 (4) 2.4 μg/m3 (10) 10.0
 
March 29, 2020, 9 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.19 ppb (2) 4.0 μg/m3 (4) 2.1 μg/m3 (9) 9.0
 
March 29, 2020, 8 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.19 ppb (2) 4.0 μg/m3 (4) 2.1 μg/m3 (9) 9.0
 
March 29, 2020, 7 p.m. N/A N/A N/A 4.0 ppb (4) N/A N/A N/A 0.21 ppb (2) 5.0 μg/m3 (5) 2.9 μg/m3 (12) 12.0
 
March 29, 2020, 6 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.25 ppb (3) 5.0 μg/m3 (5) 2.9 μg/m3 (12) 12.0
 
March 29, 2020, 5 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.22 ppb (2) 5.0 μg/m3 (5) 2.8 μg/m3 (12) 12.0
 
March 29, 2020, 4 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.21 ppb (2) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 12.0
 
March 29, 2020, 3 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.2 ppb (2) 5.0 μg/m3 (5) 2.7 μg/m3 (11) 11.0
 
March 29, 2020, 2 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.2 ppb (2) 5.0 μg/m3 (5) 2.6 μg/m3 (11) 11.0
 
March 29, 2020, 1 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.21 ppb (2) 3.0 μg/m3 (3) 1.8 μg/m3 (8) 8.0
 
March 29, 2020, noon N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.21 ppb (2) 4.0 μg/m3 (4) 2.6 μg/m3 (11) 11.0
 
March 29, 2020, 11 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.23 ppb (3) 5.0 μg/m3 (5) 3.7 μg/m3 (15) 15.0
 
March 29, 2020, 10 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.23 ppb (3) 6.0 μg/m3 (5) 4.0 μg/m3 (17) 17.0
 
March 29, 2020, 9 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.23 ppb (3) 5.0 μg/m3 (5) 4.0 μg/m3 (17) 17.0
 
March 29, 2020, 8 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.22 ppb (2) 7.0 μg/m3 (6) 4.9 μg/m3 (20) 20.0