AQSQID: 060550004

Site Name: Napa - Napa Valley College

Location: Napa (Roy Patrick Dr), CA

Reporting: True, Located: True

Current AQI: 12.0

Napa (Roy Patrick Dr) CA, US: 38.278849, -122.275024

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 18, 2019, noon 13.1 ppb (12) 4.2 ppb (4) N/A 9.0 ppb (8) N/A N/A 16.0 ppb (12) 0.42 ppb (5) N/A 3.0 μg/m3 (12) 12.0
 
March 18, 2019, 11 a.m. 6.3 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 20.0 ppb (15) 0.37 ppb (4) N/A 6.0 μg/m3 (25) 25.0
 
March 18, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
March 18, 2019, 9 a.m. 3.2 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (19) 0.28 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 18, 2019, 8 a.m. 3.5 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (21) 0.28 ppb (3) N/A 18.0 μg/m3 (63) 63.0
 
March 18, 2019, 7 a.m. 5.4 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 27.0 ppb (21) 0.27 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
March 18, 2019, 6 a.m. 6.6 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 27.0 ppb (21) 0.33 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 5 a.m. 9.0 ppb (8) 1.1 ppb (1) N/A 8.0 ppb (7) N/A N/A 29.0 ppb (22) 0.35 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 4 a.m. 11.4 ppb (11) 1.1 ppb (1) N/A 10.0 ppb (9) N/A N/A 26.0 ppb (20) 0.38 ppb (4) N/A 11.0 μg/m3 (46) 46.0
 
March 18, 2019, 3 a.m. 14.1 ppb (13) 0.5 ppb (0) N/A 14.0 ppb (13) N/A N/A 32.0 ppb (25) 0.46 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 2 a.m. 8.2 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 43.0 ppb (33) 0.29 ppb (3) N/A 7.0 μg/m3 (29) 33.0
 
March 18, 2019, 1 a.m. 3.8 ppb (4) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 55.0 ppb (42) 0.27 ppb (3) N/A 7.0 μg/m3 (29) 42.0
 
March 18, 2019, midnight 3.3 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 56.0 ppb (43) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 43.0
 
March 17, 2019, 11 p.m. 3.0 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 56.0 ppb (43) 0.25 ppb (3) N/A 3.0 μg/m3 (12) 43.0
 
March 17, 2019, 10 p.m. 2.5 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 56.0 ppb (43) 0.25 ppb (3) N/A 2.0 μg/m3 (8) 43.0
 
March 17, 2019, 9 p.m. 2.6 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 56.0 ppb (43) 0.24 ppb (3) N/A 2.0 μg/m3 (8) 43.0
 
March 17, 2019, 8 p.m. 2.8 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 55.0 ppb (42) 0.25 ppb (3) N/A 2.0 μg/m3 (8) 42.0
 
March 17, 2019, 7 p.m. 2.4 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 37.0
 
March 17, 2019, 6 p.m. 2.7 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) 0.27 ppb (3) N/A 6.0 μg/m3 (25) 29.0
 
March 17, 2019, 5 p.m. 3.5 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 30.0 ppb (23) 0.31 ppb (3) N/A 4.0 μg/m3 (17) 23.0
 
March 17, 2019, 4 p.m. 9.3 ppb (9) 3.6 ppb (3) N/A 6.0 ppb (6) N/A N/A 18.0 ppb (14) 0.39 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
March 17, 2019, 3 p.m. 13.1 ppb (12) 4.4 ppb (4) N/A 9.0 ppb (8) N/A N/A 11.0 ppb (8) 0.43 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
March 17, 2019, 2 p.m. 13.6 ppb (13) 4.0 ppb (4) N/A 10.0 ppb (9) N/A N/A 9.0 ppb (7) 0.44 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
March 17, 2019, 1 p.m. 8.9 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A 12.0 ppb (9) 0.36 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
March 17, 2019, noon 6.6 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 13.0 ppb (10) 0.35 ppb (4) N/A 0.0 μg/m3 (0) 10.0
 
March 17, 2019, 11 a.m. 4.9 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 16.0 ppb (12) 0.28 ppb (3) N/A 0.0 μg/m3 (0) 12.0
 
March 17, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (17) 17.0
 
March 17, 2019, 9 a.m. 3.6 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 21.0 ppb (16) 0.27 ppb (3) N/A 3.0 μg/m3 (12) 16.0
 
March 17, 2019, 8 a.m. 5.0 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 20.0 ppb (15) 0.27 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
March 17, 2019, 7 a.m. 6.9 ppb (6) 1.4 ppb (1) N/A 6.0 ppb (6) N/A N/A 19.0 ppb (15) 0.26 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
March 17, 2019, 6 a.m. 6.2 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 23.0 ppb (18) 0.27 ppb (3) N/A 3.0 μg/m3 (12) 18.0
 
March 17, 2019, 5 a.m. 5.1 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 28.0 ppb (22) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 22.0
 
March 17, 2019, 4 a.m. 4.1 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.21 ppb (2) N/A 4.0 μg/m3 (17) 28.0
 
March 17, 2019, 3 a.m. 3.2 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) 0.2 ppb (2) N/A 3.0 μg/m3 (12) 32.0
 
March 17, 2019, 2 a.m. 2.8 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) 0.21 ppb (2) N/A 1.0 μg/m3 (4) 34.0
 
March 17, 2019, 1 a.m. 2.1 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) 0.21 ppb (2) N/A 2.0 μg/m3 (8) 34.0
 
March 17, 2019, midnight 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 57.0 ppb (44) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 44.0
 
March 16, 2019, 11 p.m. 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 55.0 ppb (42) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 42.0
 
March 16, 2019, 10 p.m. 2.8 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 56.0 ppb (43) 0.28 ppb (3) N/A 5.0 μg/m3 (21) 43.0
 
March 16, 2019, 9 p.m. 2.7 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 53.0 ppb (41) 0.28 ppb (3) N/A 3.0 μg/m3 (12) 41.0
 
March 16, 2019, 8 p.m. 3.0 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) 0.27 ppb (3) N/A 3.0 μg/m3 (12) 36.0
 
March 16, 2019, 7 p.m. 2.7 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (32) 0.24 ppb (3) N/A 2.0 μg/m3 (8) 32.0
 
March 16, 2019, 6 p.m. 4.3 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.27 ppb (3) N/A 3.0 μg/m3 (12) 28.0
 
March 16, 2019, 5 p.m. 6.3 ppb (6) 1.8 ppb (2) N/A 5.0 ppb (5) N/A N/A 29.0 ppb (22) 0.34 ppb (4) N/A 4.0 μg/m3 (17) 22.0
 
March 16, 2019, 4 p.m. 11.5 ppb (11) 4.7 ppb (4) N/A 7.0 ppb (6) N/A N/A 18.0 ppb (14) 0.41 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
March 16, 2019, 3 p.m. 23.6 ppb (22) 11.4 ppb (11) N/A 12.0 ppb (11) N/A N/A 8.0 ppb (6) 0.51 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
March 16, 2019, 2 p.m. 20.5 ppb (19) 9.0 ppb (8) N/A 12.0 ppb (11) N/A N/A 6.0 ppb (5) 0.46 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
March 16, 2019, 1 p.m. 22.8 ppb (21) 10.6 ppb (10) N/A 12.0 ppb (11) N/A N/A 4.0 ppb (3) 0.53 ppb (6) N/A 5.0 μg/m3 (21) 21.0
 
March 16, 2019, noon 8.3 ppb (8) 2.2 ppb (2) N/A 6.0 ppb (6) N/A N/A 12.0 ppb (9) 0.34 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
March 16, 2019, 11 a.m. 6.1 ppb (6) 1.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 12.0 ppb (9) 0.33 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 0.0 μg/m3 (0) N/A
March 16, 2019, 9 a.m. 5.5 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 16.0 ppb (12) 0.31 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 16, 2019, 8 a.m. 5.0 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 20.0 ppb (15) 0.28 ppb (3) N/A 17.0 μg/m3 (61) 61.0
 
March 16, 2019, 7 a.m. 6.0 ppb (6) 1.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 21.0 ppb (16) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
March 16, 2019, 6 a.m. 10.4 ppb (10) 1.9 ppb (2) N/A 9.0 ppb (8) N/A N/A 18.0 ppb (14) 0.41 ppb (5) N/A 6.0 μg/m3 (25) 25.0
 
March 16, 2019, 5 a.m. 8.8 ppb (8) 0.8 ppb (1) N/A 8.0 ppb (7) N/A N/A 20.0 ppb (15) 0.3 ppb (3) N/A 3.0 μg/m3 (12) 15.0
 
March 16, 2019, 4 a.m. 12.3 ppb (11) 1.3 ppb (1) N/A 11.0 ppb (10) N/A N/A 23.0 ppb (18) 0.3 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 16, 2019, 3 a.m. 4.8 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
March 16, 2019, 2 a.m. 4.0 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 26.0
 
March 16, 2019, 1 a.m. 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) 0.21 ppb (2) N/A 6.0 μg/m3 (25) 37.0
 
March 16, 2019, midnight 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 58.0 ppb (45) 0.22 ppb (2) N/A 6.0 μg/m3 (25) 45.0
 
March 15, 2019, 11 p.m. 2.3 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 57.0 ppb (44) 0.21 ppb (2) N/A 5.0 μg/m3 (21) 44.0
 
March 15, 2019, 10 p.m. 2.8 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 56.0 ppb (43) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 43.0
 
March 15, 2019, 9 p.m. 2.9 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 55.0 ppb (42) 0.23 ppb (3) N/A 4.0 μg/m3 (17) 42.0
 
March 15, 2019, 8 p.m. 3.7 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) 0.22 ppb (2) N/A 1.0 μg/m3 (4) 36.0
 
March 15, 2019, 7 p.m. 5.2 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.23 ppb (3) N/A 2.0 μg/m3 (8) 28.0
 
March 15, 2019, 6 p.m. 9.3 ppb (9) 2.8 ppb (3) N/A 7.0 ppb (6) N/A N/A 31.0 ppb (24) 0.3 ppb (3) N/A 2.0 μg/m3 (8) 24.0
 
March 15, 2019, 5 p.m. 14.8 ppb (14) 5.2 ppb (5) N/A 10.0 ppb (9) N/A N/A 24.0 ppb (18) 0.39 ppb (4) N/A 3.0 μg/m3 (12) 18.0
 
March 15, 2019, 4 p.m. 31.1 ppb (29) 15.8 ppb (15) N/A 15.0 ppb (14) N/A N/A 12.0 ppb (9) 0.56 ppb (6) N/A 7.0 μg/m3 (29) 29.0
 
March 15, 2019, 3 p.m. 31.4 ppb (29) 15.7 ppb (15) N/A 16.0 ppb (15) N/A N/A 7.0 ppb (5) 0.7 ppb (8) N/A 8.0 μg/m3 (33) 33.0
 
March 15, 2019, 2 p.m. 41.7 ppb (39) 23.7 ppb (22) N/A 18.0 ppb (17) N/A N/A 4.0 ppb (3) 0.71 ppb (8) N/A 5.0 μg/m3 (21) 39.0
 
March 15, 2019, 1 p.m. 37.0 ppb (34) 18.7 ppb (17) N/A 18.0 ppb (17) N/A N/A 3.0 ppb (2) 0.59 ppb (7) N/A 5.0 μg/m3 (21) 34.0
 
March 15, 2019, noon 17.6 ppb (16) 5.7 ppb (5) N/A 12.0 ppb (11) N/A N/A 8.0 ppb (6) 0.4 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 15, 2019, 11 a.m. 7.9 ppb (7) 1.9 ppb (2) N/A 6.0 ppb (6) N/A N/A 14.0 ppb (11) 0.31 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
March 15, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A -2.0 μg/m3 (0) N/A
March 15, 2019, 9 a.m. 4.7 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 19.0 ppb (15) 0.28 ppb (3) N/A N/A 15.0
 
March 15, 2019, 8 a.m. 6.4 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 19.0 ppb (15) 0.29 ppb (3) N/A 16.0 μg/m3 (59) 59.0
 
March 15, 2019, 7 a.m. 4.7 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 23.0 ppb (18) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 15, 2019, 6 a.m. 7.3 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A 19.0 ppb (15) 0.28 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 15, 2019, 5 a.m. 12.8 ppb (12) 2.0 ppb (2) N/A 11.0 ppb (10) N/A N/A 18.0 ppb (14) 0.34 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
March 15, 2019, 4 a.m. 12.6 ppb (12) 1.5 ppb (1) N/A 11.0 ppb (10) N/A N/A 19.0 ppb (15) 0.34 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 15, 2019, 3 a.m. 7.4 ppb (7) 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A 27.0 ppb (21) 0.21 ppb (2) N/A 3.0 μg/m3 (12) 21.0
 
March 15, 2019, 2 a.m. 5.4 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) 0.2 ppb (2) N/A 0.0 μg/m3 (0) 25.0
 
March 15, 2019, 1 a.m. 1.3 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (30) 0.15 ppb (2) N/A 1.0 μg/m3 (4) 30.0
 
March 15, 2019, midnight 1.1 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) 0.15 ppb (2) N/A 2.0 μg/m3 (8) 34.0
 
March 14, 2019, 11 p.m. 1.2 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) 0.15 ppb (2) N/A 2.0 μg/m3 (8) 38.0
 
March 14, 2019, 10 p.m. 1.3 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) 0.14 ppb (2) N/A 1.0 μg/m3 (4) 36.0
 
March 14, 2019, 9 p.m. 2.8 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) 0.14 ppb (2) N/A 2.0 μg/m3 (8) 35.0
 
March 14, 2019, 8 p.m. 3.1 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) 0.14 ppb (2) N/A 2.0 μg/m3 (8) 35.0
 
March 14, 2019, 7 p.m. 3.8 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) 0.15 ppb (2) N/A 0.0 μg/m3 (0) 34.0
 
March 14, 2019, 6 p.m. 4.3 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (33) 0.18 ppb (2) N/A -2.0 μg/m3 (0) 33.0
 
March 14, 2019, 5 p.m. 3.6 ppb (3) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (32) 0.23 ppb (3) N/A -1.0 μg/m3 (0) 32.0
 
March 14, 2019, 4 p.m. 7.0 ppb (6) 1.8 ppb (2) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (28) 0.28 ppb (3) N/A 2.0 μg/m3 (8) 28.0
 
March 14, 2019, 3 p.m. 18.3 ppb (17) 6.7 ppb (6) N/A 12.0 ppb (11) N/A N/A 29.0 ppb (22) 0.36 ppb (4) N/A 3.0 μg/m3 (12) 22.0
 
March 14, 2019, 2 p.m. 25.5 ppb (24) 8.3 ppb (8) N/A 17.0 ppb (16) N/A N/A 23.0 ppb (18) 0.53 ppb (6) N/A 4.0 μg/m3 (17) 24.0
 
March 14, 2019, 1 p.m. 14.5 ppb (13) 2.9 ppb (3) N/A 12.0 ppb (11) N/A N/A 29.0 ppb (22) 0.4 ppb (4) N/A 3.0 μg/m3 (12) 22.0
 
March 14, 2019, noon 12.6 ppb (12) 2.5 ppb (2) N/A 10.0 ppb (9) N/A N/A 27.0 ppb (21) 0.34 ppb (4) N/A 3.0 μg/m3 (12) 21.0
 
March 14, 2019, 11 a.m. 6.4 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 27.0 ppb (21) 0.3 ppb (3) N/A 2.0 μg/m3 (8) 21.0
 
March 14, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.0 μg/m3 (12) 12.0
 
March 14, 2019, 9 a.m. 2.8 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (24) 0.24 ppb (3) N/A 2.0 μg/m3 (8) 24.0
 
March 14, 2019, 8 a.m. 2.6 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) 0.25 ppb (3) N/A 2.0 μg/m3 (8) 25.0
 
March 14, 2019, 7 a.m. 5.2 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 27.0 ppb (21) 0.28 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 14, 2019, 6 a.m. 7.0 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 28.0 ppb (22) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 22.0
 
March 14, 2019, 5 a.m. 8.4 ppb (8) 0.9 ppb (1) N/A 7.0 ppb (6) N/A N/A 28.0 ppb (22) 0.26 ppb (3) N/A 1.0 μg/m3 (4) 22.0
 
March 14, 2019, 4 a.m. 13.1 ppb (12) 1.4 ppb (1) N/A 12.0 ppb (11) N/A N/A 22.0 ppb (17) 0.29 ppb (3) N/A 0.0 μg/m3 (0) 17.0
 
March 14, 2019, 3 a.m. 17.2 ppb (16) 2.6 ppb (2) N/A 15.0 ppb (14) N/A N/A 18.0 ppb (14) 0.38 ppb (4) N/A 2.0 μg/m3 (8) 16.0
 
March 14, 2019, 2 a.m. 9.1 ppb (8) 1.5 ppb (1) N/A 8.0 ppb (7) N/A N/A 33.0 ppb (25) 0.21 ppb (2) N/A 2.0 μg/m3 (8) 25.0
 
March 14, 2019, 1 a.m. 4.3 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) 0.14 ppb (2) N/A 0.0 μg/m3 (0) 33.0
 
March 14, 2019, midnight 3.5 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (35) 0.14 ppb (2) N/A 1.0 μg/m3 (4) 35.0
 
March 13, 2019, 11 p.m. 2.0 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) 0.14 ppb (2) N/A 2.0 μg/m3 (8) 36.0
 
March 13, 2019, 10 p.m. 2.5 ppb (2) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) 0.15 ppb (2) N/A 1.0 μg/m3 (4) 35.0
 
March 13, 2019, 9 p.m. 1.8 ppb (2) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (37) 0.15 ppb (2) N/A -2.0 μg/m3 (0) 37.0
 
March 13, 2019, 8 p.m. 2.9 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) 0.16 ppb (2) N/A 0.0 μg/m3 (0) 35.0
 
March 13, 2019, 7 p.m. 3.0 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) 0.18 ppb (2) N/A 1.0 μg/m3 (4) 34.0
 
March 13, 2019, 6 p.m. 2.9 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (32) 0.21 ppb (2) N/A -1.0 μg/m3 (0) 32.0
 
March 13, 2019, 5 p.m. 4.7 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.27 ppb (3) N/A 0.0 μg/m3 (0) 29.0
 
March 13, 2019, 4 p.m. 6.8 ppb (6) 1.8 ppb (2) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (26) 0.29 ppb (3) N/A 1.0 μg/m3 (4) 26.0
 
March 13, 2019, 3 p.m. 10.2 ppb (9) 2.2 ppb (2) N/A 8.0 ppb (7) N/A N/A 31.0 ppb (24) 0.33 ppb (4) N/A 2.0 μg/m3 (8) 24.0
 
March 13, 2019, 2 p.m. 19.1 ppb (18) 3.5 ppb (3) N/A 16.0 ppb (15) N/A N/A 21.0 ppb (16) 0.37 ppb (4) N/A 4.0 μg/m3 (17) 18.0
 
March 13, 2019, 1 p.m. 18.3 ppb (17) 4.6 ppb (4) N/A 14.0 ppb (13) N/A N/A 22.0 ppb (17) 0.37 ppb (4) N/A 2.0 μg/m3 (8) 17.0
 
March 13, 2019, noon 6.0 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 28.0 ppb (22) 0.29 ppb (3) N/A 1.0 μg/m3 (4) 22.0
 
March 13, 2019, 11 a.m. 3.4 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 29.0 ppb (22) 0.27 ppb (3) N/A 1.0 μg/m3 (4) 22.0
 
March 13, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
March 13, 2019, 9 a.m. 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 31.0 ppb (24) 0.24 ppb (3) N/A 4.0 μg/m3 (17) 24.0
 
March 13, 2019, 8 a.m. 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (25) 0.26 ppb (3) N/A 3.0 μg/m3 (12) 25.0
 
March 13, 2019, 7 a.m. 4.0 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) 0.26 ppb (3) N/A 4.0 μg/m3 (17) 25.0
 
March 13, 2019, 6 a.m. 4.7 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) 0.24 ppb (3) N/A 3.0 μg/m3 (12) 25.0
 
March 13, 2019, 5 a.m. 5.8 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (26) 0.29 ppb (3) N/A 2.0 μg/m3 (8) 26.0
 
March 13, 2019, 4 a.m. 4.5 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.19 ppb (2) N/A 3.0 μg/m3 (12) 28.0
 
March 13, 2019, 3 a.m. 9.8 ppb (9) 1.6 ppb (1) N/A 8.0 ppb (7) N/A N/A 29.0 ppb (22) 0.27 ppb (3) N/A 2.0 μg/m3 (8) 22.0
 
March 13, 2019, 2 a.m. 3.3 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) 0.15 ppb (2) N/A -1.0 μg/m3 (0) 31.0
 
March 13, 2019, 1 a.m. 1.8 ppb (2) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 42.0 ppb (32) 0.13 ppb (1) N/A 1.0 μg/m3 (4) 32.0
 
March 13, 2019, midnight 1.5 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) 0.13 ppb (1) N/A 2.0 μg/m3 (8) 34.0
 
March 12, 2019, 11 p.m. 1.1 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) 0.13 ppb (1) N/A -1.0 μg/m3 (0) 35.0
 
March 12, 2019, 10 p.m. 1.1 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) 0.13 ppb (1) N/A -1.0 μg/m3 (0) 35.0
 
March 12, 2019, 9 p.m. 1.1 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) 0.13 ppb (1) N/A 1.0 μg/m3 (4) 35.0
 
March 12, 2019, 8 p.m. 0.9 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (33) 0.14 ppb (2) N/A 2.0 μg/m3 (8) 33.0
 
March 12, 2019, 7 p.m. 1.7 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A N/A 38.0 ppb (29) 0.17 ppb (2) N/A 1.0 μg/m3 (4) 29.0
 
March 12, 2019, 6 p.m. 3.9 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (25) 0.23 ppb (3) N/A 2.0 μg/m3 (8) 25.0
 
March 12, 2019, 5 p.m. 7.1 ppb (7) 2.7 ppb (3) N/A 4.0 ppb (4) N/A N/A 25.0 ppb (19) 0.29 ppb (3) N/A 4.0 μg/m3 (17) 19.0
 
March 12, 2019, 4 p.m. 21.4 ppb (20) 11.4 ppb (11) N/A 10.0 ppb (9) N/A N/A 14.0 ppb (11) 0.45 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 12, 2019, 3 p.m. 37.0 ppb (34) 23.1 ppb (21) N/A 14.0 ppb (13) N/A N/A 4.0 ppb (3) 0.68 ppb (8) N/A 7.0 μg/m3 (29) 34.0
 
March 12, 2019, 2 p.m. 46.9 ppb (43) 31.4 ppb (29) N/A 16.0 ppb (15) N/A N/A 1.0 ppb (1) 0.8 ppb (9) N/A 4.0 μg/m3 (17) 43.0
 
March 12, 2019, 1 p.m. 23.5 ppb (22) 11.5 ppb (11) N/A 12.0 ppb (11) N/A N/A 4.0 ppb (3) 0.45 ppb (5) N/A 5.0 μg/m3 (21) 22.0
 
March 12, 2019, noon 14.8 ppb (14) 5.8 ppb (5) N/A 9.0 ppb (8) N/A N/A 3.0 ppb (2) 0.39 ppb (4) N/A 8.0 μg/m3 (33) 33.0
 
March 12, 2019, 11 a.m. 8.4 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A 6.0 ppb (5) 0.33 ppb (4) N/A 4.0 μg/m3 (17) 17.0
 
March 12, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 1.0 μg/m3 (4) 4.0
 
March 12, 2019, 9 a.m. 4.5 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 11.0 ppb (8) 0.28 ppb (3) N/A -4.0 μg/m3 (0) 8.0
 
March 12, 2019, 8 a.m. 6.5 ppb (6) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 10.0 ppb (8) 0.33 ppb (4) N/A -3.0 μg/m3 (0) 8.0
 
March 12, 2019, 7 a.m. 4.1 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 15.0 ppb (12) 0.28 ppb (3) N/A 3.0 μg/m3 (12) 12.0
 
March 12, 2019, 6 a.m. 7.6 ppb (7) 1.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 13.0 ppb (10) 0.34 ppb (4) N/A 5.0 μg/m3 (21) 21.0
 
March 12, 2019, 5 a.m. 7.7 ppb (7) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A 15.0 ppb (12) 0.27 ppb (3) N/A 2.0 μg/m3 (8) 12.0
 
March 12, 2019, 4 a.m. 8.8 ppb (8) 1.5 ppb (1) N/A 7.0 ppb (6) N/A N/A 22.0 ppb (17) 0.23 ppb (3) N/A 3.0 μg/m3 (12) 17.0
 
March 12, 2019, 3 a.m. 4.0 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (22) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 22.0
 
March 12, 2019, 2 a.m. 4.5 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (22) 0.17 ppb (2) N/A 1.0 μg/m3 (4) 22.0
 
March 12, 2019, 1 a.m. 2.7 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) 0.15 ppb (2) N/A -1.0 μg/m3 (0) 25.0
 
March 12, 2019, midnight 1.3 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (32) 0.14 ppb (2) N/A -2.0 μg/m3 (0) 32.0
 
March 11, 2019, 11 p.m. 2.3 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (32) 0.16 ppb (2) N/A -3.0 μg/m3 (0) 32.0
 
March 11, 2019, 10 p.m. 2.0 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A N/A 41.0 ppb (32) 0.15 ppb (2) N/A -2.0 μg/m3 (0) 32.0
 
March 11, 2019, 9 p.m. 1.2 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) 0.15 ppb (2) N/A -3.0 μg/m3 (0) 31.0
 
March 11, 2019, 8 p.m. 1.5 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) 0.15 ppb (2) N/A N/A 31.0
 
March 11, 2019, 7 p.m. 2.4 ppb (2) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 28.0
 
March 11, 2019, 6 p.m. 2.7 ppb (3) 0.9 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.21 ppb (2) N/A 1.0 μg/m3 (4) 28.0
 
March 11, 2019, 5 p.m. 13.1 ppb (12) 5.1 ppb (5) N/A 8.0 ppb (7) N/A N/A 20.0 ppb (15) 0.37 ppb (4) N/A 2.0 μg/m3 (8) 15.0
 
March 11, 2019, 4 p.m. 22.6 ppb (21) 11.9 ppb (11) N/A 11.0 ppb (10) N/A N/A 10.0 ppb (8) 0.47 ppb (5) N/A 5.0 μg/m3 (21) 21.0
 
March 11, 2019, 3 p.m. 39.2 ppb (36) 25.2 ppb (23) N/A 14.0 ppb (13) N/A N/A 4.0 ppb (3) 0.77 ppb (9) N/A 5.0 μg/m3 (21) 36.0
 
March 11, 2019, 2 p.m. 40.4 ppb (37) 27.4 ppb (25) N/A 13.0 ppb (12) N/A N/A 1.0 ppb (1) 0.62 ppb (7) N/A 5.0 μg/m3 (21) 37.0
 
March 11, 2019, 1 p.m. 30.1 ppb (28) 16.7 ppb (15) N/A 13.0 ppb (12) N/A N/A 2.0 ppb (2) 0.52 ppb (6) N/A 5.0 μg/m3 (21) 28.0