AQSQID: 090050005

Site Name: Cornwall

Location: Litchfield Co, CT

Reporting: True, Located: True

Current AQI: 36.0

Litchfield Co CT, US: 41.833099, -73.303299

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 20, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 47.0 ppb (36) 0.14 ppb (2) 6.0 μg/m3 (5) 3.8 μg/m3 (16) 36.0
 
March 20, 2019, 7 a.m. N/A 0.5 ppb (0) 1.5 ppb (1) N/A N/A 0.0 ppb (0) 46.0 ppb (35) N/A 5.0 μg/m3 (5) 3.8 μg/m3 (16) 35.0
 
March 20, 2019, 6 a.m. N/A 0.5 ppb (0) 1.6 ppb (1) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.15 ppb (2) 7.0 μg/m3 (6) 4.0 μg/m3 (17) 35.0
 
March 20, 2019, 5 a.m. N/A 0.5 ppb (0) 2.0 ppb (2) N/A N/A 0.0 ppb (0) N/A 0.15 ppb (2) 7.0 μg/m3 (6) 4.3 μg/m3 (18) 18.0
 
March 20, 2019, 4 a.m. N/A 0.5 ppb (0) 1.9 ppb (2) N/A N/A 0.0 ppb (0) 47.0 ppb (36) 0.15 ppb (2) 7.0 μg/m3 (6) 4.4 μg/m3 (18) 36.0
 
March 20, 2019, 3 a.m. N/A 0.5 ppb (0) 1.7 ppb (2) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.15 ppb (2) 7.0 μg/m3 (6) 3.9 μg/m3 (16) 35.0
 
March 20, 2019, 2 a.m. N/A 0.5 ppb (0) 1.5 ppb (1) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.14 ppb (2) 5.0 μg/m3 (5) 3.6 μg/m3 (15) 35.0
 
March 20, 2019, 1 a.m. N/A 0.5 ppb (0) 1.5 ppb (1) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.16 ppb (2) 6.0 μg/m3 (5) 3.6 μg/m3 (15) 35.0
 
March 20, 2019, midnight N/A 0.5 ppb (0) 1.5 ppb (1) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.15 ppb (2) 4.0 μg/m3 (4) 3.4 μg/m3 (14) 35.0
 
March 19, 2019, 11 p.m. N/A 0.5 ppb (0) 1.5 ppb (1) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.15 ppb (2) 6.0 μg/m3 (5) 3.4 μg/m3 (14) 35.0
 
March 19, 2019, 10 p.m. N/A 0.5 ppb (0) 1.5 ppb (1) N/A N/A N/A 45.0 ppb (35) 0.14 ppb (2) 6.0 μg/m3 (5) 3.4 μg/m3 (14) 35.0
 
March 19, 2019, 9 p.m. N/A 0.6 ppb (1) 1.4 ppb (1) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.15 ppb (2) 6.0 μg/m3 (5) 3.7 μg/m3 (15) 35.0
 
March 19, 2019, 8 p.m. N/A 0.6 ppb (1) 1.5 ppb (1) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.14 ppb (2) 6.0 μg/m3 (5) 3.4 μg/m3 (14) 34.0
 
March 19, 2019, 7 p.m. N/A 0.6 ppb (1) 1.8 ppb (2) N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.15 ppb (2) 8.0 μg/m3 (7) 4.5 μg/m3 (19) 33.0
 
March 19, 2019, 6 p.m. N/A 0.6 ppb (1) 2.0 ppb (2) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.14 ppb (2) 8.0 μg/m3 (7) 4.6 μg/m3 (19) 32.0
 
March 19, 2019, 5 p.m. N/A 0.6 ppb (1) 1.9 ppb (2) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.14 ppb (2) N/A N/A 32.0
 
March 19, 2019, 4 p.m. N/A 0.6 ppb (1) 1.7 ppb (2) N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.14 ppb (2) 6.0 μg/m3 (5) 3.9 μg/m3 (16) 30.0
 
March 19, 2019, 3 p.m. N/A 0.6 ppb (1) 1.6 ppb (1) N/A N/A 0.0 ppb (0) 37.0 ppb (28) N/A 6.0 μg/m3 (5) 3.4 μg/m3 (14) 28.0
 
March 19, 2019, 2 p.m. N/A 0.7 ppb (1) 1.5 ppb (1) N/A N/A N/A 34.0 ppb (26) 0.14 ppb (2) 7.0 μg/m3 (6) 3.3 μg/m3 (14) 26.0
 
March 19, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.14 ppb (2) 7.0 μg/m3 (6) 3.5 μg/m3 (15) 31.0
 
March 19, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.14 ppb (2) 8.0 μg/m3 (7) 4.3 μg/m3 (18) 33.0
 
March 19, 2019, 11 a.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.14 ppb (2) 7.0 μg/m3 (6) 4.2 μg/m3 (18) 33.0
 
March 19, 2019, 10 a.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.14 ppb (2) 8.0 μg/m3 (7) 4.3 μg/m3 (18) 34.0
 
March 19, 2019, 9 a.m. N/A 0.2 ppb (0) 1.2 ppb (1) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.14 ppb (2) 8.0 μg/m3 (7) 4.9 μg/m3 (20) 34.0
 
March 19, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.14 ppb (2) 8.0 μg/m3 (7) 4.7 μg/m3 (20) 34.0
 
March 19, 2019, 7 a.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A N/A 0.0 ppb (0) 44.0 ppb (34) N/A 7.0 μg/m3 (6) 4.7 μg/m3 (20) 34.0
 
March 19, 2019, 6 a.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A N/A 0.0 ppb (0) N/A 0.15 ppb (2) 7.0 μg/m3 (6) 4.7 μg/m3 (20) 20.0
 
March 19, 2019, 5 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A N/A 0.0 ppb (0) N/A 0.15 ppb (2) 7.0 μg/m3 (6) 4.7 μg/m3 (20) 20.0
 
March 19, 2019, 4 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A N/A 0.0 ppb (0) N/A 0.15 ppb (2) 8.0 μg/m3 (7) 4.7 μg/m3 (20) 20.0
 
March 19, 2019, 3 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A N/A 0.0 ppb (0) N/A 0.15 ppb (2) 8.0 μg/m3 (7) 4.6 μg/m3 (19) 19.0
 
March 19, 2019, 2 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A N/A 0.0 ppb (0) N/A 0.15 ppb (2) 8.0 μg/m3 (7) 4.5 μg/m3 (19) 19.0
 
March 19, 2019, 1 a.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A N/A 0.0 ppb (0) N/A 0.15 ppb (2) 7.0 μg/m3 (6) 4.0 μg/m3 (17) 17.0
 
March 19, 2019, midnight N/A 0.0 ppb (0) 0.5 ppb (0) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.14 ppb (2) 6.0 μg/m3 (5) 2.9 μg/m3 (12) 35.0
 
March 18, 2019, 11 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.13 ppb (1) 7.0 μg/m3 (6) 2.3 μg/m3 (10) 35.0
 
March 18, 2019, 10 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A N/A N/A 46.0 ppb (35) 0.12 ppb (1) 5.0 μg/m3 (5) 2.2 μg/m3 (9) 35.0
 
March 18, 2019, 9 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A N/A 0.0 ppb (0) 47.0 ppb (36) 0.14 ppb (2) 5.0 μg/m3 (5) 2.6 μg/m3 (11) 36.0
 
March 18, 2019, 8 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A N/A 0.0 ppb (0) 47.0 ppb (36) 0.13 ppb (1) 6.0 μg/m3 (5) 2.4 μg/m3 (10) 36.0
 
March 18, 2019, 7 p.m. N/A 0.0 ppb (0) 0.9 ppb (1) N/A N/A 0.0 ppb (0) 47.0 ppb (36) 0.13 ppb (1) 6.0 μg/m3 (5) 2.3 μg/m3 (10) 36.0
 
March 18, 2019, 6 p.m. N/A 0.0 ppb (0) 1.1 ppb (1) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.13 ppb (1) 5.0 μg/m3 (5) 2.9 μg/m3 (12) 35.0
 
March 18, 2019, 5 p.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.14 ppb (2) 4.0 μg/m3 (4) 3.0 μg/m3 (12) 35.0
 
March 18, 2019, 4 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.13 ppb (1) 4.0 μg/m3 (4) 2.6 μg/m3 (11) 35.0
 
March 18, 2019, 3 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.13 ppb (1) 4.0 μg/m3 (4) 2.7 μg/m3 (11) 34.0
 
March 18, 2019, 2 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.13 ppb (1) 4.0 μg/m3 (4) 2.7 μg/m3 (11) 34.0
 
March 18, 2019, 1 p.m. N/A 0.1 ppb (0) 1.0 ppb (1) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.14 ppb (2) 4.0 μg/m3 (4) 2.6 μg/m3 (11) 32.0
 
March 18, 2019, noon N/A 0.0 ppb (0) 1.3 ppb (1) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.14 ppb (2) 6.0 μg/m3 (5) 3.3 μg/m3 (14) 32.0
 
March 18, 2019, 11 a.m. N/A 0.0 ppb (0) 1.1 ppb (1) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.14 ppb (2) 4.0 μg/m3 (4) 2.7 μg/m3 (11) 32.0
 
March 18, 2019, 10 a.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.14 ppb (2) 4.0 μg/m3 (4) 2.3 μg/m3 (10) 32.0
 
March 18, 2019, 9 a.m. N/A 0.2 ppb (0) 0.6 ppb (1) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.14 ppb (2) 4.0 μg/m3 (4) 2.1 μg/m3 (9) 32.0
 
March 18, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.13 ppb (1) 4.0 μg/m3 (4) 1.8 μg/m3 (8) 33.0
 
March 18, 2019, 7 a.m. N/A 0.0 ppb (0) 0.3 ppb (0) N/A N/A 0.0 ppb (0) 44.0 ppb (34) N/A 3.0 μg/m3 (3) 1.5 μg/m3 (6) 34.0
 
March 18, 2019, 6 a.m. N/A 0.0 ppb (0) 0.3 ppb (0) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.13 ppb (1) 4.0 μg/m3 (4) 1.6 μg/m3 (7) 34.0
 
March 18, 2019, 5 a.m. N/A 0.0 ppb (0) 0.4 ppb (0) N/A N/A 0.0 ppb (0) N/A 0.13 ppb (1) 3.0 μg/m3 (3) 1.5 μg/m3 (6) 6.0
 
March 18, 2019, 4 a.m. N/A 0.0 ppb (0) 0.4 ppb (0) N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.13 ppb (1) 4.0 μg/m3 (4) 1.5 μg/m3 (6) 33.0
 
March 18, 2019, 3 a.m. N/A 0.0 ppb (0) 0.3 ppb (0) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.13 ppb (1) 3.0 μg/m3 (3) 1.3 μg/m3 (5) 34.0
 
March 18, 2019, 2 a.m. N/A 0.0 ppb (0) 0.3 ppb (0) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.13 ppb (1) 3.0 μg/m3 (3) 1.6 μg/m3 (7) 34.0
 
March 18, 2019, 1 a.m. N/A 0.0 ppb (0) 0.3 ppb (0) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.13 ppb (1) 5.0 μg/m3 (5) 1.9 μg/m3 (8) 35.0
 
March 18, 2019, midnight N/A -0.1 ppb (0) 0.3 ppb (0) N/A N/A 0.0 ppb (0) 46.0 ppb (35) 0.13 ppb (1) 4.0 μg/m3 (4) 2.0 μg/m3 (8) 35.0
 
March 17, 2019, 11 p.m. N/A 0.0 ppb (0) 0.5 ppb (0) N/A N/A 0.0 ppb (0) N/A 0.13 ppb (1) 5.0 μg/m3 (5) 1.9 μg/m3 (8) 8.0
 
March 17, 2019, 10 p.m. N/A 0.0 ppb (0) 0.5 ppb (0) N/A N/A N/A 45.0 ppb (35) 0.13 ppb (1) 3.0 μg/m3 (3) 1.8 μg/m3 (8) 35.0
 
March 17, 2019, 9 p.m. N/A 0.0 ppb (0) 0.4 ppb (0) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.14 ppb (2) 3.0 μg/m3 (3) 1.5 μg/m3 (6) 35.0
 
March 17, 2019, 8 p.m. N/A 0.0 ppb (0) 0.5 ppb (0) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.13 ppb (1) 3.0 μg/m3 (3) 1.5 μg/m3 (6) 35.0
 
March 17, 2019, 7 p.m. N/A 0.0 ppb (0) 0.5 ppb (0) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.13 ppb (1) 3.0 μg/m3 (3) 1.4 μg/m3 (6) 35.0
 
March 17, 2019, 6 p.m. N/A 0.0 ppb (0) 0.4 ppb (0) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.13 ppb (1) 3.0 μg/m3 (3) 1.5 μg/m3 (6) 35.0
 
March 17, 2019, 5 p.m. N/A 0.0 ppb (0) 0.4 ppb (0) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.13 ppb (1) 3.0 μg/m3 (3) 1.4 μg/m3 (6) 35.0
 
March 17, 2019, 4 p.m. N/A 0.0 ppb (0) 0.4 ppb (0) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.13 ppb (1) 2.0 μg/m3 (2) 1.1 μg/m3 (5) 34.0
 
March 17, 2019, 3 p.m. N/A 0.0 ppb (0) 0.4 ppb (0) N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.13 ppb (1) 2.0 μg/m3 (2) 0.9 μg/m3 (4) 33.0
 
March 17, 2019, 2 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.13 ppb (1) 3.0 μg/m3 (3) 1.6 μg/m3 (7) 32.0
 
March 17, 2019, 1 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.13 ppb (1) 2.0 μg/m3 (2) 1.8 μg/m3 (8) 32.0
 
March 17, 2019, noon N/A 0.0 ppb (0) 0.5 ppb (0) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.13 ppb (1) 3.0 μg/m3 (3) 1.9 μg/m3 (8) 31.0
 
March 17, 2019, 11 a.m. N/A 0.0 ppb (0) 0.3 ppb (0) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.13 ppb (1) 3.0 μg/m3 (3) 1.2 μg/m3 (5) 32.0
 
March 17, 2019, 10 a.m. N/A 0.0 ppb (0) 0.3 ppb (0) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.13 ppb (1) 2.0 μg/m3 (2) 1.4 μg/m3 (6) 32.0
 
March 17, 2019, 9 a.m. N/A 0.2 ppb (0) 0.4 ppb (0) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.13 ppb (1) 3.0 μg/m3 (3) 1.9 μg/m3 (8) 32.0
 
March 17, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.12 ppb (1) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 31.0
 
March 17, 2019, 7 a.m. N/A 0.0 ppb (0) 0.4 ppb (0) N/A N/A 0.0 ppb (0) 40.0 ppb (31) N/A 2.0 μg/m3 (2) 1.6 μg/m3 (7) 31.0
 
March 17, 2019, 6 a.m. N/A 0.0 ppb (0) 0.5 ppb (0) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.13 ppb (1) 3.0 μg/m3 (3) 1.8 μg/m3 (8) 32.0
 
March 17, 2019, 5 a.m. N/A 0.0 ppb (0) 0.5 ppb (0) N/A N/A 0.0 ppb (0) N/A 0.14 ppb (2) 4.0 μg/m3 (4) 2.2 μg/m3 (9) 9.0
 
March 17, 2019, 4 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.14 ppb (2) 5.0 μg/m3 (5) 2.3 μg/m3 (10) 32.0
 
March 17, 2019, 3 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.14 ppb (2) 5.0 μg/m3 (5) 2.2 μg/m3 (9) 32.0
 
March 17, 2019, 2 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.13 ppb (1) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 33.0
 
March 17, 2019, 1 a.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.14 ppb (2) 5.0 μg/m3 (5) 2.5 μg/m3 (10) 34.0
 
March 17, 2019, midnight N/A 0.0 ppb (0) 0.5 ppb (0) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.14 ppb (2) 4.0 μg/m3 (4) 2.2 μg/m3 (9) 34.0
 
March 16, 2019, 11 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.14 ppb (2) 4.0 μg/m3 (4) 2.4 μg/m3 (10) 35.0
 
March 16, 2019, 10 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A N/A N/A N/A 0.13 ppb (1) 3.0 μg/m3 (3) 2.3 μg/m3 (10) 10.0
 
March 16, 2019, 9 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A N/A 0.0 ppb (0) N/A 0.14 ppb (2) 3.0 μg/m3 (3) 2.2 μg/m3 (9) 9.0
 
March 16, 2019, 8 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A N/A 0.0 ppb (0) N/A 0.13 ppb (1) 3.0 μg/m3 (3) 1.7 μg/m3 (7) 7.0
 
March 16, 2019, 7 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A N/A 0.0 ppb (0) N/A 0.14 ppb (2) 3.0 μg/m3 (3) 1.6 μg/m3 (7) 7.0
 
March 16, 2019, 6 p.m. N/A 0.0 ppb (0) 0.6 ppb (1) N/A N/A 0.0 ppb (0) N/A 0.13 ppb (1) 3.0 μg/m3 (3) 1.5 μg/m3 (6) 6.0
 
March 16, 2019, 5 p.m. N/A 0.0 ppb (0) 0.7 ppb (1) N/A N/A 0.0 ppb (0) 47.0 ppb (36) 0.13 ppb (1) 3.0 μg/m3 (3) 1.5 μg/m3 (6) 36.0
 
March 16, 2019, 4 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.14 ppb (2) 2.0 μg/m3 (2) 1.5 μg/m3 (6) 35.0
 
March 16, 2019, 3 p.m. N/A 0.0 ppb (0) 0.8 ppb (1) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.15 ppb (2) 2.0 μg/m3 (2) 1.0 μg/m3 (4) 32.0
 
March 16, 2019, 2 p.m. N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.15 ppb (2) 1.0 μg/m3 (1) 0.8 μg/m3 (3) 32.0
 
March 16, 2019, 1 p.m. N/A 0.0 ppb (0) 1.2 ppb (1) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.16 ppb (2) 2.0 μg/m3 (2) 0.7 μg/m3 (3) 31.0
 
March 16, 2019, noon N/A 0.0 ppb (0) 1.4 ppb (1) N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.15 ppb (2) 2.0 μg/m3 (2) 0.6 μg/m3 (2) 28.0
 
March 16, 2019, 11 a.m. N/A 0.0 ppb (0) 1.4 ppb (1) N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.15 ppb (2) 2.0 μg/m3 (2) 0.9 μg/m3 (4) 27.0
 
March 16, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.15 ppb (2) 2.0 μg/m3 (2) 1.0 μg/m3 (4) 27.0
 
March 16, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 34.0 ppb (26) 0.16 ppb (2) 5.0 μg/m3 (5) 3.6 μg/m3 (15) 26.0
 
March 16, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 33.0 ppb (25) 0.15 ppb (2) 9.0 μg/m3 (8) 5.8 μg/m3 (24) 25.0
 
March 16, 2019, 7 a.m. N/A 0.0 ppb (0) 1.6 ppb (1) N/A N/A 0.0 ppb (0) 34.0 ppb (26) N/A 10.0 μg/m3 (9) 6.6 μg/m3 (28) 28.0
 
March 16, 2019, 6 a.m. N/A 0.0 ppb (0) 1.6 ppb (1) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.15 ppb (2) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 28.0
 
March 16, 2019, 5 a.m. N/A 0.0 ppb (0) 1.6 ppb (1) N/A N/A 0.0 ppb (0) N/A 0.16 ppb (2) 10.0 μg/m3 (9) 6.1 μg/m3 (25) 25.0
 
March 16, 2019, 4 a.m. N/A -0.1 ppb (0) 1.5 ppb (1) N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.16 ppb (2) 10.0 μg/m3 (9) 5.8 μg/m3 (24) 30.0
 
March 16, 2019, 3 a.m. N/A 0.0 ppb (0) 1.7 ppb (2) N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.17 ppb (2) 11.0 μg/m3 (10) 5.5 μg/m3 (23) 33.0
 
March 16, 2019, 2 a.m. N/A 0.0 ppb (0) 3.4 ppb (3) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.2 ppb (2) 11.0 μg/m3 (10) 7.6 μg/m3 (32) 32.0
 
March 16, 2019, 1 a.m. N/A 0.0 ppb (0) 4.0 ppb (4) N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.21 ppb (2) 10.0 μg/m3 (9) 7.2 μg/m3 (30) 33.0
 
March 16, 2019, midnight N/A 0.0 ppb (0) 4.3 ppb (4) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.2 ppb (2) 13.0 μg/m3 (12) 9.6 μg/m3 (40) 40.0
 
March 15, 2019, 11 p.m. N/A 0.0 ppb (0) 5.8 ppb (5) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.2 ppb (2) 20.0 μg/m3 (18) 11.9 μg/m3 (50) 50.0
 
March 15, 2019, 10 p.m. N/A 0.0 ppb (0) 7.4 ppb (7) N/A N/A N/A 46.0 ppb (35) 0.2 ppb (2) 26.0 μg/m3 (24) 11.9 μg/m3 (50) 50.0
 
March 15, 2019, 9 p.m. N/A 0.3 ppb (0) 8.6 ppb (8) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.21 ppb (2) 24.0 μg/m3 (22) 11.4 μg/m3 (48) 48.0
 
March 15, 2019, 8 p.m. N/A 0.8 ppb (1) 11.1 ppb (10) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.22 ppb (2) 20.0 μg/m3 (18) 10.2 μg/m3 (42) 42.0
 
March 15, 2019, 7 p.m. N/A 0.9 ppb (1) 11.6 ppb (11) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.23 ppb (3) 20.0 μg/m3 (18) 11.1 μg/m3 (46) 46.0
 
March 15, 2019, 6 p.m. N/A 2.1 ppb (2) 12.0 ppb (11) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.23 ppb (3) 17.0 μg/m3 (15) 8.9 μg/m3 (37) 37.0
 
March 15, 2019, 5 p.m. N/A 2.2 ppb (2) 12.3 ppb (11) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.23 ppb (3) 18.0 μg/m3 (16) 10.2 μg/m3 (42) 42.0
 
March 15, 2019, 4 p.m. N/A 1.6 ppb (1) 10.1 ppb (9) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.21 ppb (2) 21.0 μg/m3 (19) 12.5 μg/m3 (51) 51.0
 
March 15, 2019, 3 p.m. N/A 0.8 ppb (1) 8.3 ppb (8) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.21 ppb (2) 21.0 μg/m3 (19) 13.0 μg/m3 (52) 52.0
 
March 15, 2019, 2 p.m. N/A 0.4 ppb (0) 6.2 ppb (6) N/A N/A 0.0 ppb (0) 40.0 ppb (31) 0.19 ppb (2) 19.0 μg/m3 (17) 11.9 μg/m3 (50) 50.0
 
March 15, 2019, 1 p.m. N/A 0.1 ppb (0) 3.7 ppb (3) N/A N/A 0.0 ppb (0) 43.0 ppb (33) 0.17 ppb (2) 17.0 μg/m3 (15) 9.9 μg/m3 (41) 41.0
 
March 15, 2019, noon N/A 0.0 ppb (0) 2.2 ppb (2) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.16 ppb (2) 10.0 μg/m3 (9) 6.4 μg/m3 (27) 34.0
 
March 15, 2019, 11 a.m. N/A 0.0 ppb (0) 1.8 ppb (2) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.15 ppb (2) 9.0 μg/m3 (8) 5.7 μg/m3 (24) 35.0
 
March 15, 2019, 10 a.m. N/A 0.0 ppb (0) 1.5 ppb (1) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.15 ppb (2) 6.0 μg/m3 (5) 4.1 μg/m3 (17) 35.0
 
March 15, 2019, 9 a.m. N/A 0.2 ppb (0) 1.5 ppb (1) N/A N/A 0.0 ppb (0) 48.0 ppb (37) 0.16 ppb (2) 8.0 μg/m3 (7) 4.9 μg/m3 (20) 37.0
 
March 15, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (37) 0.15 ppb (2) 9.0 μg/m3 (8) 5.6 μg/m3 (23) 37.0
 
March 15, 2019, 7 a.m. N/A 0.0 ppb (0) 1.5 ppb (1) N/A N/A 0.0 ppb (0) 50.0 ppb (38) N/A 12.0 μg/m3 (11) 6.7 μg/m3 (28) 38.0
 
March 15, 2019, 6 a.m. N/A 0.0 ppb (0) 1.7 ppb (2) N/A N/A 0.0 ppb (0) 50.0 ppb (38) 0.15 ppb (2) 13.0 μg/m3 (12) 7.0 μg/m3 (29) 38.0
 
March 15, 2019, 5 a.m. N/A 0.0 ppb (0) 1.8 ppb (2) N/A N/A 0.0 ppb (0) N/A 0.16 ppb (2) 12.0 μg/m3 (11) 6.5 μg/m3 (27) 27.0
 
March 15, 2019, 4 a.m. N/A 0.0 ppb (0) 2.1 ppb (2) N/A N/A 0.0 ppb (0) 52.0 ppb (40) 0.16 ppb (2) 12.0 μg/m3 (11) 6.0 μg/m3 (25) 40.0
 
March 15, 2019, 3 a.m. N/A 0.0 ppb (0) 2.4 ppb (2) N/A N/A 0.0 ppb (0) 52.0 ppb (40) 0.17 ppb (2) 12.0 μg/m3 (11) 6.4 μg/m3 (27) 40.0
 
March 15, 2019, 2 a.m. N/A 0.0 ppb (0) 2.4 ppb (2) N/A N/A 0.0 ppb (0) 52.0 ppb (40) 0.16 ppb (2) 12.0 μg/m3 (11) 6.1 μg/m3 (25) 40.0
 
March 15, 2019, 1 a.m. N/A 0.0 ppb (0) 2.3 ppb (2) N/A N/A 0.0 ppb (0) 54.0 ppb (42) 0.17 ppb (2) 11.0 μg/m3 (10) 5.5 μg/m3 (23) 42.0
 
March 15, 2019, midnight N/A 0.0 ppb (0) 2.5 ppb (2) N/A N/A 0.0 ppb (0) 55.0 ppb (42) 0.17 ppb (2) 10.0 μg/m3 (9) 5.5 μg/m3 (23) 42.0
 
March 14, 2019, 11 p.m. N/A 0.0 ppb (0) 2.8 ppb (3) N/A N/A 0.0 ppb (0) 55.0 ppb (42) 0.18 ppb (2) 12.0 μg/m3 (11) 5.7 μg/m3 (24) 42.0
 
March 14, 2019, 10 p.m. N/A 0.0 ppb (0) 3.2 ppb (3) N/A N/A N/A 56.0 ppb (43) 0.17 ppb (2) 12.0 μg/m3 (11) 5.5 μg/m3 (23) 43.0
 
March 14, 2019, 9 p.m. N/A 0.0 ppb (0) 3.4 ppb (3) N/A N/A 0.0 ppb (0) 59.0 ppb (45) 0.18 ppb (2) 14.0 μg/m3 (13) 6.8 μg/m3 (28) 45.0
 
March 14, 2019, 8 p.m. N/A 0.1 ppb (0) 3.9 ppb (4) N/A N/A 0.0 ppb (0) 60.0 ppb (46) 0.17 ppb (2) 14.0 μg/m3 (13) 7.5 μg/m3 (31) 46.0
 
March 14, 2019, 7 p.m. N/A 0.4 ppb (0) 5.4 ppb (5) N/A N/A 0.0 ppb (0) 57.0 ppb (44) 0.17 ppb (2) 14.0 μg/m3 (13) 7.7 μg/m3 (32) 44.0
 
March 14, 2019, 6 p.m. N/A 0.7 ppb (1) 6.0 ppb (6) N/A N/A 0.0 ppb (0) 55.0 ppb (42) 0.18 ppb (2) 12.0 μg/m3 (11) 6.7 μg/m3 (28) 42.0
 
March 14, 2019, 5 p.m. N/A 1.2 ppb (1) 7.3 ppb (7) N/A N/A 0.0 ppb (0) 51.0 ppb (39) 0.19 ppb (2) 14.0 μg/m3 (13) 7.4 μg/m3 (31) 39.0
 
March 14, 2019, 4 p.m. N/A 1.2 ppb (1) 7.0 ppb (6) N/A N/A 0.0 ppb (0) 49.0 ppb (38) 0.18 ppb (2) 12.0 μg/m3 (11) 7.0 μg/m3 (29) 38.0
 
March 14, 2019, 3 p.m. N/A 0.9 ppb (1) 6.3 ppb (6) N/A N/A 0.0 ppb (0) 48.0 ppb (37) 0.18 ppb (2) 12.0 μg/m3 (11) 7.6 μg/m3 (32) 37.0
 
March 14, 2019, 2 p.m. N/A 0.7 ppb (1) 6.5 ppb (6) N/A N/A 0.0 ppb (0) 45.0 ppb (35) 0.17 ppb (2) 14.0 μg/m3 (13) 8.1 μg/m3 (34) 35.0
 
March 14, 2019, 1 p.m. N/A 0.5 ppb (0) 5.5 ppb (5) N/A N/A 0.0 ppb (0) 44.0 ppb (34) 0.18 ppb (2) 11.0 μg/m3 (10) 6.7 μg/m3 (28) 34.0
 
March 14, 2019, noon N/A 0.2 ppb (0) 5.4 ppb (5) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.18 ppb (2) 11.0 μg/m3 (10) 6.7 μg/m3 (28) 32.0
 
March 14, 2019, 11 a.m. N/A 0.0 ppb (0) 4.9 ppb (5) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.19 ppb (2) 12.0 μg/m3 (11) 7.8 μg/m3 (32) 32.0
 
March 14, 2019, 10 a.m. N/A 0.0 ppb (0) 4.8 ppb (4) N/A N/A 0.0 ppb (0) 42.0 ppb (32) 0.19 ppb (2) 15.0 μg/m3 (14) 9.6 μg/m3 (40) 40.0
 
March 14, 2019, 9 a.m. N/A 0.2 ppb (0) 5.1 ppb (5) N/A N/A 0.0 ppb (0) 41.0 ppb (32) 0.19 ppb (2) 15.0 μg/m3 (14) 10.2 μg/m3 (42) 42.0
 
March 14, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) 0.19 ppb (2) 15.0 μg/m3 (14) 10.6 μg/m3 (44) 44.0
 
March 14, 2019, 7 a.m. N/A 0.0 ppb (0) 7.0 ppb (6) N/A N/A 0.0 ppb (0) 37.0 ppb (28) N/A 15.0 μg/m3 (14) 10.9 μg/m3 (45) 45.0
 
March 14, 2019, 6 a.m. N/A 0.0 ppb (0) 8.2 ppb (8) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.22 ppb (2) 16.0 μg/m3 (15) 11.7 μg/m3 (49) 49.0
 
March 14, 2019, 5 a.m. N/A 0.0 ppb (0) 8.8 ppb (8) N/A N/A 0.0 ppb (0) N/A 0.23 ppb (3) 16.0 μg/m3 (15) 11.1 μg/m3 (46) 46.0
 
March 14, 2019, 4 a.m. N/A 0.0 ppb (0) 9.9 ppb (9) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.22 ppb (2) 14.0 μg/m3 (13) 9.9 μg/m3 (41) 41.0
 
March 14, 2019, 3 a.m. N/A 0.0 ppb (0) 10.7 ppb (10) N/A N/A 0.0 ppb (0) 37.0 ppb (28) 0.22 ppb (2) 17.0 μg/m3 (15) 10.6 μg/m3 (44) 44.0
 
March 14, 2019, 2 a.m. N/A 0.0 ppb (0) 12.0 ppb (11) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.22 ppb (2) 15.0 μg/m3 (14) 9.9 μg/m3 (41) 41.0
 
March 14, 2019, 1 a.m. N/A 0.0 ppb (0) 13.4 ppb (12) N/A N/A 0.0 ppb (0) 36.0 ppb (28) 0.24 ppb (3) 17.0 μg/m3 (15) 10.2 μg/m3 (42) 42.0
 
March 14, 2019, midnight N/A 0.0 ppb (0) 15.1 ppb (14) N/A N/A 0.0 ppb (0) 35.0 ppb (27) 0.24 ppb (3) 16.0 μg/m3 (15) 8.9 μg/m3 (37) 37.0
 
March 13, 2019, 11 p.m. N/A 0.0 ppb (0) 13.0 ppb (12) N/A N/A 0.0 ppb (0) 38.0 ppb (29) 0.22 ppb (2) 14.0 μg/m3 (13) 7.4 μg/m3 (31) 31.0
 
March 13, 2019, 10 p.m. N/A 0.0 ppb (0) 4.8 ppb (4) N/A N/A N/A 47.0 ppb (36) 0.17 ppb (2) 11.0 μg/m3 (10) 5.2 μg/m3 (22) 36.0
 
March 13, 2019, 9 p.m. N/A 0.0 ppb (0) 3.1 ppb (3) N/A N/A 0.0 ppb (0) 51.0 ppb (39) 0.16 ppb (2) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 39.0
 
March 13, 2019, 8 p.m. N/A 0.1 ppb (0) 3.0 ppb (3) N/A N/A 0.0 ppb (0) 52.0 ppb (40) 0.14 ppb (2) 11.0 μg/m3 (10) 5.5 μg/m3 (23) 40.0
 
March 13, 2019, 7 p.m. N/A 0.0 ppb (0) 2.1 ppb (2) N/A N/A 0.0 ppb (0) 55.0 ppb (42) 0.16 ppb (2) 11.0 μg/m3 (10) 6.0 μg/m3 (25) 42.0
 
March 13, 2019, 6 p.m. N/A 0.0 ppb (0) 1.5 ppb (1) N/A N/A 0.0 ppb (0) 54.0 ppb (42) 0.14 ppb (2) 9.0 μg/m3 (8) 5.0 μg/m3 (21) 42.0
 
March 13, 2019, 5 p.m. N/A 0.0 ppb (0) 1.7 ppb (2) N/A N/A N/A 53.0 ppb (41) 0.14 ppb (2) 8.0 μg/m3 (7) 5.0 μg/m3 (21) 41.0
 
March 13, 2019, 4 p.m. N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A N/A 53.0 ppb (41) 0.14 ppb (2) 8.0 μg/m3 (7) 4.9 μg/m3 (20) 41.0
 
March 13, 2019, 3 p.m. N/A 0.1 ppb (0) 1.8 ppb (2) N/A N/A N/A 53.0 ppb (41) 0.12 ppb (1) 7.0 μg/m3 (6) 4.5 μg/m3 (19) 41.0
 
March 13, 2019, 2 p.m. N/A 0.0 ppb (0) 1.9 ppb (2) N/A N/A N/A 50.0 ppb (38) 0.13 ppb (1) 9.0 μg/m3 (8) 5.5 μg/m3 (23) 38.0
 
March 13, 2019, 1 p.m. N/A 0.0 ppb (0) 2.3 ppb (2) N/A N/A N/A 50.0 ppb (38) 0.16 ppb (2) 12.0 μg/m3 (11) 8.3 μg/m3 (35) 38.0
 
March 13, 2019, noon N/A 0.0 ppb (0) 2.5 ppb (2) N/A N/A N/A 49.0 ppb (38) 0.16 ppb (2) 10.0 μg/m3 (9) 7.1 μg/m3 (30) 38.0
 
March 13, 2019, 11 a.m. N/A 0.0 ppb (0) 1.9 ppb (2) N/A N/A 0.0 ppb (0) 49.0 ppb (38) 0.15 ppb (2) 9.0 μg/m3 (8) 6.4 μg/m3 (27) 38.0
 
March 13, 2019, 10 a.m. N/A 0.0 ppb (0) 1.5 ppb (1) N/A N/A 0.0 ppb (0) 49.0 ppb (38) 0.15 ppb (2) 7.0 μg/m3 (6) 4.9 μg/m3 (20) 38.0
 
March 13, 2019, 9 a.m. N/A 0.2 ppb (0) 1.5 ppb (1) N/A N/A 0.0 ppb (0) 50.0 ppb (38) 0.15 ppb (2) 7.0 μg/m3 (6) 4.8 μg/m3 (20) 38.0