ID: 2978

AQSQID: 060550004

Site Name: Napa - Napa Valley College

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

Updated: April 22, 2021, 9:43 a.m.

Location: Napa (Soscol Gateway S), CA

Reporting: True, Located: True

Current AQI: 62.0

Napa (Soscol Gateway S) CA, US: 38.278849, -122.275024

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
April 22, 2021, 8 a.m. 0.4 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) 0.19 ppb (3) N/A 17.0 μg/m3 (62) 62.0
 
April 22, 2021, 7 a.m. 0.2 ppb (1) -0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A 41.0 ppb (38) 0.18 ppb (3) N/A 16.0 μg/m3 (60) 60.0
 
April 22, 2021, 6 a.m. 0.2 ppb (1) -0.2 ppb (0) N/A 0.0 ppb (0) N/A N/A 40.0 ppb (38) 0.18 ppb (3) N/A 18.0 μg/m3 (64) 64.0
 
April 22, 2021, 5 a.m. 0.4 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) 0.19 ppb (3) N/A 20.0 μg/m3 (68) 68.0
 
April 22, 2021, 4 a.m. 0.7 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (31) 0.19 ppb (3) N/A 14.0 μg/m3 (55) 55.0
 
April 22, 2021, 3 a.m. 0.9 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 34.0 ppb (32) 0.19 ppb (3) N/A 17.0 μg/m3 (62) 62.0
 
April 22, 2021, 2 a.m. 2.5 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (34) 0.21 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
April 22, 2021, 1 a.m. 2.4 ppb (3) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) 0.17 ppb (3) N/A 14.0 μg/m3 (55) 55.0
 
April 22, 2021, midnight 1.8 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) 0.15 ppb (2) N/A 15.0 μg/m3 (58) 58.0
 
April 21, 2021, 11 p.m. 1.9 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) 0.15 ppb (2) N/A 16.0 μg/m3 (60) 60.0
 
April 21, 2021, 10 p.m. 1.9 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) 0.16 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
April 21, 2021, 9 p.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) 0.17 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
April 21, 2021, 8 p.m. 1.7 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) 0.18 ppb (3) N/A 14.0 μg/m3 (55) 55.0
 
April 21, 2021, 7 p.m. 1.7 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) 0.19 ppb (3) N/A 16.0 μg/m3 (60) 60.0
 
April 21, 2021, 6 p.m. 2.3 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) 0.2 ppb (3) N/A 16.0 μg/m3 (60) 60.0
 
April 21, 2021, 5 p.m. 1.4 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (35) 0.2 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
April 21, 2021, 4 p.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) 0.19 ppb (3) N/A 19.0 μg/m3 (66) 66.0
 
April 21, 2021, 3 p.m. 2.6 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (31) 0.18 ppb (3) N/A 15.0 μg/m3 (58) 58.0
 
April 21, 2021, 2 p.m. 3.3 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 30.0 ppb (28) 0.19 ppb (3) N/A 21.0 μg/m3 (70) 70.0
 
April 21, 2021, 1 p.m. 2.7 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 27.0 ppb (25) 0.19 ppb (3) N/A 16.0 μg/m3 (60) 60.0
 
April 21, 2021, noon 2.5 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (24) 0.19 ppb (3) N/A 19.0 μg/m3 (66) 66.0
 
April 21, 2021, 11 a.m. 4.4 ppb (5) -0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 17.0 ppb (16) 0.21 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
April 21, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
April 21, 2021, 9 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 24.0 ppb (23) 0.18 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
April 21, 2021, 8 a.m. 1.8 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 27.0 ppb (25) 0.18 ppb (3) N/A 21.0 μg/m3 (70) 70.0
 
April 21, 2021, 7 a.m. 1.9 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 28.0 ppb (26) 0.18 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
April 21, 2021, 6 a.m. 0.7 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 30.0 ppb (28) 0.18 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
April 21, 2021, 5 a.m. 0.8 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 32.0 ppb (30) 0.18 ppb (3) N/A 14.0 μg/m3 (55) 55.0
 
April 21, 2021, 4 a.m. 1.0 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (31) 0.18 ppb (3) N/A 13.0 μg/m3 (53) 53.0
 
April 21, 2021, 3 a.m. 1.7 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 32.0 ppb (30) 0.17 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
April 21, 2021, 2 a.m. 1.6 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) 0.14 ppb (2) N/A 13.0 μg/m3 (53) 53.0
 
April 21, 2021, 1 a.m. 0.5 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (31) 0.1 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
April 21, 2021, midnight 0.4 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (31) 0.1 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
April 20, 2021, 11 p.m. 0.4 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (31) 0.1 ppb (2) N/A 6.0 μg/m3 (25) 31.0
 
April 20, 2021, 10 p.m. 0.6 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 34.0 ppb (32) 0.12 ppb (2) N/A 7.0 μg/m3 (30) 32.0
 
April 20, 2021, 9 p.m. 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (31) 0.13 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
April 20, 2021, 8 p.m. 1.7 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) 0.14 ppb (2) N/A 8.0 μg/m3 (34) 34.0
 
April 20, 2021, 7 p.m. 3.6 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (31) 0.16 ppb (3) N/A 7.0 μg/m3 (30) 31.0
 
April 20, 2021, 6 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 31.0 ppb (29) 0.18 ppb (3) N/A 6.0 μg/m3 (25) 29.0
 
April 20, 2021, 5 p.m. 1.7 ppb (2) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) 0.17 ppb (3) N/A N/A 32.0
 
April 20, 2021, 4 p.m. 1.6 ppb (2) 0.2 ppb (1) N/A 1.0 ppb (1) N/A N/A 31.0 ppb (29) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 29.0
 
April 20, 2021, 3 p.m. 4.3 ppb (5) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (24) 0.17 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 20, 2021, 2 p.m. 18.6 ppb (18) 6.4 ppb (7) N/A 12.0 ppb (12) N/A N/A 8.0 ppb (8) 0.27 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
April 20, 2021, 1 p.m. 21.8 ppb (21) 5.6 ppb (6) N/A 16.0 ppb (16) N/A N/A 4.0 ppb (4) 0.34 ppb (4) N/A 8.0 μg/m3 (34) 34.0
 
April 20, 2021, noon 15.3 ppb (15) 5.4 ppb (6) N/A 10.0 ppb (10) N/A N/A 10.0 ppb (10) 0.23 ppb (3) N/A 7.0 μg/m3 (30) 30.0
 
April 20, 2021, 11 a.m. 4.0 ppb (4) 0.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 19.0 ppb (18) 0.17 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
April 20, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (30) 30.0
 
April 20, 2021, 9 a.m. 0.9 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 30.0 ppb (28) 0.14 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
April 20, 2021, 8 a.m. 0.9 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 32.0 ppb (30) 0.14 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
April 20, 2021, 7 a.m. 1.1 ppb (2) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 34.0 ppb (32) 0.14 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
April 20, 2021, 6 a.m. 1.2 ppb (2) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (31) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 31.0
 
April 20, 2021, 5 a.m. 1.1 ppb (2) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 34.0 ppb (32) 0.16 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
April 20, 2021, 4 a.m. 1.7 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 37.0 ppb (35) 0.18 ppb (3) N/A 8.0 μg/m3 (34) 35.0
 
April 20, 2021, 3 a.m. 1.7 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) 0.15 ppb (2) N/A 8.0 μg/m3 (34) 36.0
 
April 20, 2021, 2 a.m. 3.2 ppb (4) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (38) 0.13 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
April 20, 2021, 1 a.m. 1.6 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) 0.12 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
April 20, 2021, midnight 1.5 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) 0.14 ppb (2) N/A 13.0 μg/m3 (53) 53.0
 
April 19, 2021, 11 p.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) 0.14 ppb (2) N/A 13.0 μg/m3 (53) 53.0
 
April 19, 2021, 10 p.m. 1.9 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) 0.15 ppb (2) N/A 14.0 μg/m3 (55) 55.0
 
April 19, 2021, 9 p.m. 2.2 ppb (3) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) 0.15 ppb (2) N/A 10.0 μg/m3 (42) 43.0
 
April 19, 2021, 8 p.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) 0.15 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
April 19, 2021, 7 p.m. 1.7 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (41) 0.17 ppb (3) N/A 14.0 μg/m3 (55) 55.0
 
April 19, 2021, 6 p.m. 1.7 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) 0.18 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
April 19, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
April 19, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
April 19, 2021, 3 p.m. 2.3 ppb (3) 0.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (34) 0.47 ppb (6) N/A N/A 34.0
 
April 19, 2021, 2 p.m. 6.4 ppb (7) 0.4 ppb (1) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (29) 0.5 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
April 19, 2021, 1 p.m. 14.2 ppb (14) 1.7 ppb (2) N/A 13.0 ppb (13) N/A N/A 29.0 ppb (27) 0.52 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
April 19, 2021, noon 3.5 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (30) 0.47 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
April 19, 2021, 11 a.m. 1.2 ppb (2) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) 0.45 ppb (6) N/A 6.0 μg/m3 (25) 34.0
 
April 19, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (30) 30.0
 
April 19, 2021, 9 a.m. 1.1 ppb (2) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) 0.46 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
April 19, 2021, 8 a.m. 1.2 ppb (2) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (37) 0.47 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
April 19, 2021, 7 a.m. 1.5 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) 0.47 ppb (6) N/A 4.0 μg/m3 (17) 37.0
 
April 19, 2021, 6 a.m. 2.8 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (37) 0.49 ppb (6) N/A 5.0 μg/m3 (21) 37.0
 
April 19, 2021, 5 a.m. 3.1 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (37) 0.49 ppb (6) N/A 6.0 μg/m3 (25) 37.0
 
April 19, 2021, 4 a.m. 2.3 ppb (3) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) 0.46 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
April 19, 2021, 3 a.m. 1.4 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) 0.42 ppb (5) N/A 8.0 μg/m3 (34) 38.0
 
April 19, 2021, 2 a.m. 1.3 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) 0.42 ppb (5) N/A 8.0 μg/m3 (34) 38.0
 
April 19, 2021, 1 a.m. 1.1 ppb (2) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (41) 0.41 ppb (5) N/A 4.0 μg/m3 (17) 41.0
 
April 19, 2021, midnight 0.6 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (42) 0.41 ppb (5) N/A 6.0 μg/m3 (25) 42.0
 
April 18, 2021, 11 p.m. 0.5 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) 0.39 ppb (5) N/A 3.0 μg/m3 (13) 46.0
 
April 18, 2021, 10 p.m. 0.7 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 50.0 ppb (47) 0.42 ppb (5) N/A 4.0 μg/m3 (17) 47.0
 
April 18, 2021, 9 p.m. 2.5 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (49) 0.45 ppb (6) N/A 8.0 μg/m3 (34) 49.0
 
April 18, 2021, 8 p.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (44) 0.48 ppb (6) N/A 6.0 μg/m3 (25) 44.0
 
April 18, 2021, 7 p.m. 1.5 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) 0.46 ppb (6) N/A 8.0 μg/m3 (34) 38.0
 
April 18, 2021, 6 p.m. 2.2 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) 0.45 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
April 18, 2021, 5 p.m. 3.0 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (32) 0.48 ppb (6) N/A 5.0 μg/m3 (21) 32.0
 
April 18, 2021, 4 p.m. 5.0 ppb (5) 1.2 ppb (2) N/A 4.0 ppb (4) N/A N/A 26.0 ppb (25) 0.53 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
April 18, 2021, 3 p.m. 8.3 ppb (8) 2.5 ppb (3) N/A 6.0 ppb (6) N/A N/A 19.0 ppb (18) 0.57 ppb (7) N/A 17.0 μg/m3 (62) 62.0
 
April 18, 2021, 2 p.m. 9.9 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (7) N/A N/A 13.0 ppb (13) 0.57 ppb (7) N/A 5.0 μg/m3 (21) 21.0
 
April 18, 2021, 1 p.m. 8.5 ppb (9) 2.4 ppb (3) N/A 6.0 ppb (6) N/A N/A 12.0 ppb (12) 0.54 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
April 18, 2021, noon 4.4 ppb (5) 0.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 13.0 ppb (13) 0.47 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
April 18, 2021, 11 a.m. 3.7 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 16.0 ppb (15) 0.48 ppb (6) N/A 6.0 μg/m3 (25) 25.0
 
April 18, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
April 18, 2021, 9 a.m. 4.6 ppb (5) -0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 17.0 ppb (16) 0.52 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
April 18, 2021, 8 a.m. 5.4 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 18.0 ppb (17) 0.51 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
April 18, 2021, 7 a.m. 1.6 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 30.0 ppb (28) 0.47 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
April 18, 2021, 6 a.m. 2.3 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (26) 0.49 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
April 18, 2021, 5 a.m. 1.9 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (27) 0.47 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
April 18, 2021, 4 a.m. 1.7 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (32) 0.43 ppb (5) N/A 7.0 μg/m3 (30) 32.0
 
April 18, 2021, 3 a.m. 2.1 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) 0.43 ppb (5) N/A 5.0 μg/m3 (21) 36.0
 
April 18, 2021, 2 a.m. 2.3 ppb (3) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) 0.43 ppb (5) N/A 4.0 μg/m3 (17) 37.0
 
April 18, 2021, 1 a.m. 2.1 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) 0.46 ppb (6) N/A 4.0 μg/m3 (17) 38.0
 
April 18, 2021, midnight 2.4 ppb (3) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (44) 0.42 ppb (5) N/A 6.0 μg/m3 (25) 44.0
 
April 17, 2021, 11 p.m. 1.6 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) 0.43 ppb (5) N/A 10.0 μg/m3 (42) 43.0
 
April 17, 2021, 10 p.m. 2.4 ppb (3) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) 0.47 ppb (6) N/A 8.0 μg/m3 (34) 43.0
 
April 17, 2021, 9 p.m. 2.3 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (43) 0.46 ppb (6) N/A 9.0 μg/m3 (38) 43.0
 
April 17, 2021, 8 p.m. 2.7 ppb (3) 0.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (40) 0.46 ppb (6) N/A 12.0 μg/m3 (50) 50.0
 
April 17, 2021, 7 p.m. 2.9 ppb (3) 0.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 39.0 ppb (37) 0.48 ppb (6) N/A 8.0 μg/m3 (34) 37.0
 
April 17, 2021, 6 p.m. 1.3 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) 0.47 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
April 17, 2021, 5 p.m. 1.1 ppb (2) 0.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 33.0 ppb (31) 0.46 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
April 17, 2021, 4 p.m. 2.4 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A N/A 27.0 ppb (25) 0.47 ppb (6) N/A 13.0 μg/m3 (53) 53.0
 
April 17, 2021, 3 p.m. 5.0 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 23.0 ppb (22) 0.49 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
April 17, 2021, 2 p.m. 15.3 ppb (15) 5.8 ppb (6) N/A 10.0 ppb (10) N/A N/A 6.0 ppb (6) 0.6 ppb (7) N/A 8.0 μg/m3 (34) 34.0
 
April 17, 2021, 1 p.m. 12.6 ppb (12) 3.2 ppb (4) N/A 9.0 ppb (9) N/A N/A 8.0 ppb (8) 0.55 ppb (7) N/A 10.0 μg/m3 (42) 42.0
 
April 17, 2021, noon 7.4 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 13.0 ppb (13) 0.51 ppb (6) N/A 8.0 μg/m3 (34) 34.0
 
April 17, 2021, 11 a.m. 4.2 ppb (4) 0.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 13.0 ppb (13) 0.49 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
April 17, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
April 17, 2021, 9 a.m. 0.9 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 27.0 ppb (25) 0.43 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
April 17, 2021, 8 a.m. 1.3 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 27.0 ppb (25) 0.44 ppb (5) N/A 7.0 μg/m3 (30) 30.0
 
April 17, 2021, 7 a.m. 2.2 ppb (3) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 29.0 ppb (27) 0.45 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
April 17, 2021, 6 a.m. 0.9 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 32.0 ppb (30) 0.44 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
April 17, 2021, 5 a.m. 1.4 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (31) 0.45 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
April 17, 2021, 4 a.m. 1.1 ppb (2) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 35.0 ppb (33) 0.45 ppb (6) N/A 6.0 μg/m3 (25) 33.0
 
April 17, 2021, 3 a.m. 1.0 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (35) 0.44 ppb (5) N/A 8.0 μg/m3 (34) 35.0
 
April 17, 2021, 2 a.m. 1.5 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) 0.42 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
April 17, 2021, 1 a.m. 1.7 ppb (2) 0.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 39.0 ppb (37) 0.38 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 17, 2021, midnight 1.5 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) 0.38 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
April 16, 2021, 11 p.m. 1.4 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (41) 0.41 ppb (5) N/A 6.0 μg/m3 (25) 41.0
 
April 16, 2021, 10 p.m. 0.9 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 46.0 ppb (43) 0.38 ppb (5) N/A 8.0 μg/m3 (34) 43.0
 
April 16, 2021, 9 p.m. 1.2 ppb (2) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (41) 0.43 ppb (5) N/A 9.0 μg/m3 (38) 41.0
 
April 16, 2021, 8 p.m. 1.9 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) 0.42 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
April 16, 2021, 7 p.m. 1.5 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) 0.43 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
April 16, 2021, 6 p.m. 2.2 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (36) 0.46 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
April 16, 2021, 5 p.m. 2.7 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (33) 0.46 ppb (6) N/A 10.0 μg/m3 (42) 42.0
 
April 16, 2021, 4 p.m. 4.2 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) 0.48 ppb (6) N/A 11.0 μg/m3 (46) 46.0
 
April 16, 2021, 3 p.m. 9.8 ppb (10) 2.9 ppb (3) N/A 7.0 ppb (7) N/A N/A 22.0 ppb (21) 0.54 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
April 16, 2021, 2 p.m. 23.6 ppb (23) 9.8 ppb (10) N/A 14.0 ppb (14) N/A N/A 7.0 ppb (7) 0.79 ppb (10) N/A 15.0 μg/m3 (58) 58.0
 
April 16, 2021, 1 p.m. 25.4 ppb (24) 9.1 ppb (9) N/A 16.0 ppb (16) N/A N/A 5.0 ppb (5) 1.05 ppb (13) N/A 7.0 μg/m3 (30) 30.0
 
April 16, 2021, noon 17.2 ppb (17) 4.5 ppb (5) N/A 13.0 ppb (13) N/A N/A 9.0 ppb (9) 0.67 ppb (8) N/A 8.0 μg/m3 (34) 34.0
 
April 16, 2021, 11 a.m. 6.8 ppb (7) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A 17.0 ppb (16) 0.47 ppb (6) N/A 7.0 μg/m3 (30) 30.0
 
April 16, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
April 16, 2021, 9 a.m. 1.8 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 26.0 ppb (25) 0.45 ppb (6) N/A 14.0 μg/m3 (55) 55.0
 
April 16, 2021, 8 a.m. 0.8 ppb (1) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) 0.42 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
April 16, 2021, 7 a.m. 1.3 ppb (2) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 37.0 ppb (35) 0.42 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
April 16, 2021, 6 a.m. 1.1 ppb (2) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 39.0 ppb (37) 0.43 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
April 16, 2021, 5 a.m. 1.5 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 40.0 ppb (38) 0.44 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
April 16, 2021, 4 a.m. 2.1 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (40) 0.44 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
April 16, 2021, 3 a.m. 1.8 ppb (2) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) 0.43 ppb (5) N/A 9.0 μg/m3 (38) 39.0
 
April 16, 2021, 2 a.m. 1.2 ppb (2) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 43.0 ppb (40) 0.39 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
April 16, 2021, 1 a.m. 1.1 ppb (2) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (44) 0.38 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
April 16, 2021, midnight 1.2 ppb (2) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (46) 0.38 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
April 15, 2021, 11 p.m. 1.5 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (47) 0.4 ppb (5) N/A 9.0 μg/m3 (38) 47.0
 
April 15, 2021, 10 p.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 51.0 ppb (48) 0.39 ppb (5) N/A 11.0 μg/m3 (46) 48.0
 
April 15, 2021, 9 p.m. 1.5 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (47) 0.42 ppb (5) N/A 13.0 μg/m3 (53) 53.0
 
April 15, 2021, 8 p.m. 1.2 ppb (2) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 48.0 ppb (45) 0.39 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
April 15, 2021, 7 p.m. 1.5 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (42) 0.41 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
April 15, 2021, 6 p.m. 2.7 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (38) 0.46 ppb (6) N/A 9.0 μg/m3 (38) 38.0
 
April 15, 2021, 5 p.m. 4.5 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (36) 0.47 ppb (6) N/A 13.0 μg/m3 (53) 53.0
 
April 15, 2021, 4 p.m. 3.6 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (35) 0.45 ppb (6) N/A 15.0 μg/m3 (58) 58.0
 
April 15, 2021, 3 p.m. 4.9 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (30) 0.47 ppb (6) N/A 13.0 μg/m3 (53) 53.0
 
April 15, 2021, 2 p.m. 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) 0.44 ppb (5) N/A 11.0 μg/m3 (46) 46.0
 
April 15, 2021, 1 p.m. 3.2 ppb (4) 0.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 32.0 ppb (30) 0.44 ppb (5) N/A 14.0 μg/m3 (55) 55.0
 
April 15, 2021, noon 3.1 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 28.0 ppb (26) 0.44 ppb (5) N/A 8.0 μg/m3 (34) 34.0
 
April 15, 2021, 11 a.m. 3.0 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 25.0 ppb (24) 0.43 ppb (5) N/A 16.0 μg/m3 (60) 60.0
 
April 15, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
April 15, 2021, 9 a.m. 1.1 ppb (2) -0.2 ppb (0) N/A 1.0 ppb (1) N/A N/A 36.0 ppb (34) 0.42 ppb (5) N/A 15.0 μg/m3 (58) 58.0