AQSQID: 060719004

Site Name: San Bernadino - 4th Street

Location: San Bernardino Co, CA

Reporting: True, Located: True

Current AQI: 20.0

San Bernardino Co CA, US: 34.1072, -117.2731

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 21, 2019, 11 a.m. 9.6 ppb (9) 0.9 ppb (1) N/A 9.0 ppb (8) N/A N/A 32.0 ppb (25) 0.12 ppb (1) 9.0 μg/m3 (8) N/A 25.0
 
May 21, 2019, 9 a.m. 7.4 ppb (7) 0.8 ppb (1) N/A 7.0 ppb (6) N/A N/A 36.0 ppb (28) 0.11 ppb (1) 9.0 μg/m3 (8) N/A 28.0
 
May 21, 2019, 8 a.m. 7.2 ppb (7) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 39.0 ppb (30) 0.11 ppb (1) 9.0 μg/m3 (8) N/A 30.0
 
May 21, 2019, 7 a.m. 5.5 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 44.0 ppb (34) 0.09 ppb (1) 4.0 μg/m3 (4) N/A 34.0
 
May 21, 2019, 6 a.m. 4.8 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 46.0 ppb (35) 0.09 ppb (1) 1.0 μg/m3 (1) N/A 35.0
 
May 21, 2019, 5 a.m. 8.0 ppb (7) 0.8 ppb (1) N/A 7.0 ppb (6) N/A N/A 42.0 ppb (32) 0.13 ppb (1) 7.0 μg/m3 (6) N/A 32.0
 
May 21, 2019, 4 a.m. 7.8 ppb (7) 0.8 ppb (1) N/A 7.0 ppb (6) N/A N/A 43.0 ppb (33) 0.14 ppb (2) 11.0 μg/m3 (10) N/A 33.0
 
May 21, 2019, 3 a.m. 9.2 ppb (9) 0.8 ppb (1) N/A 8.0 ppb (7) N/A N/A 44.0 ppb (34) 0.14 ppb (2) 13.0 μg/m3 (12) N/A 34.0
 
May 21, 2019, 2 a.m. 7.2 ppb (7) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 51.0 ppb (39) 0.14 ppb (2) 13.0 μg/m3 (12) N/A 39.0
 
May 21, 2019, 1 a.m. 7.1 ppb (7) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 55.0 ppb (42) 0.14 ppb (2) 90.0 μg/m3 (68) N/A 68.0
 
May 21, 2019, midnight 7.6 ppb (7) 1.4 ppb (1) N/A 6.0 ppb (6) N/A N/A 58.0 ppb (45) 0.15 ppb (2) 75.0 μg/m3 (60) N/A 60.0
 
May 20, 2019, 11 p.m. 8.1 ppb (8) 1.3 ppb (1) N/A 7.0 ppb (6) N/A N/A 57.0 ppb (44) 0.16 ppb (2) 41.0 μg/m3 (37) N/A 44.0
 
May 20, 2019, 10 p.m. 6.9 ppb (6) 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A 56.0 ppb (43) 0.15 ppb (2) 52.0 μg/m3 (47) N/A 47.0
 
May 20, 2019, 9 p.m. 6.9 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 53.0 ppb (41) 0.14 ppb (2) 4.0 μg/m3 (4) N/A 41.0
 
May 20, 2019, 8 p.m. 8.1 ppb (8) 2.1 ppb (2) N/A 6.0 ppb (6) N/A N/A 50.0 ppb (38) 0.14 ppb (2) 10.0 μg/m3 (9) N/A 38.0
 
May 20, 2019, 7 p.m. 6.0 ppb (6) 2.2 ppb (2) N/A 4.0 ppb (4) N/A N/A 52.0 ppb (40) 0.12 ppb (1) 6.0 μg/m3 (5) N/A 40.0
 
May 20, 2019, 6 p.m. 6.5 ppb (6) 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A 49.0 ppb (38) 0.12 ppb (1) 50.0 μg/m3 (45) N/A 45.0
 
May 20, 2019, 5 p.m. 7.7 ppb (7) 2.8 ppb (3) N/A 5.0 ppb (5) N/A N/A 46.0 ppb (35) 0.13 ppb (1) 17.0 μg/m3 (15) N/A 35.0
 
May 20, 2019, 4 p.m. 8.5 ppb (8) 2.6 ppb (2) N/A 6.0 ppb (6) N/A N/A 43.0 ppb (33) 0.13 ppb (1) 73.0 μg/m3 (59) N/A 59.0
 
May 20, 2019, 3 p.m. 12.6 ppb (12) 3.4 ppb (3) N/A 9.0 ppb (8) N/A N/A 37.0 ppb (28) 0.17 ppb (2) 5.0 μg/m3 (5) N/A 28.0
 
May 20, 2019, 2 p.m. 13.3 ppb (12) 2.5 ppb (2) N/A 11.0 ppb (10) N/A N/A 34.0 ppb (26) 0.18 ppb (2) 9.0 μg/m3 (8) N/A 26.0
 
May 20, 2019, 1 p.m. 9.9 ppb (9) 1.2 ppb (1) N/A 9.0 ppb (8) N/A N/A 35.0 ppb (27) 0.17 ppb (2) 8.0 μg/m3 (7) N/A 27.0
 
May 20, 2019, noon 8.0 ppb (7) 0.8 ppb (1) N/A 7.0 ppb (6) N/A N/A 37.0 ppb (28) 0.15 ppb (2) 9.0 μg/m3 (8) N/A 28.0
 
May 20, 2019, 11 a.m. 4.0 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (32) 0.13 ppb (1) 8.0 μg/m3 (7) N/A 32.0
 
May 20, 2019, 10 a.m. 3.4 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) 0.13 ppb (1) 6.0 μg/m3 (5) N/A 32.0
 
May 20, 2019, 9 a.m. 2.9 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (32) 0.13 ppb (1) 5.0 μg/m3 (5) N/A 32.0
 
May 20, 2019, 8 a.m. 1.9 ppb (2) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 45.0 ppb (35) 0.12 ppb (1) 2.0 μg/m3 (2) N/A 35.0
 
May 20, 2019, 7 a.m. 2.2 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 43.0 ppb (33) 0.11 ppb (1) 4.0 μg/m3 (4) N/A 33.0
 
May 20, 2019, 6 a.m. 2.5 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (32) 0.11 ppb (1) 7.0 μg/m3 (6) N/A 32.0
 
May 20, 2019, 5 a.m. 2.4 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) 0.11 ppb (1) 8.0 μg/m3 (7) N/A 35.0
 
May 20, 2019, 4 a.m. 3.1 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) 0.11 ppb (1) 16.0 μg/m3 (15) N/A 35.0
 
May 20, 2019, 3 a.m. 3.1 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) 0.12 ppb (1) 11.0 μg/m3 (10) N/A 36.0
 
May 20, 2019, 2 a.m. 4.6 ppb (4) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 50.0 ppb (38) 0.11 ppb (1) 11.0 μg/m3 (10) N/A 38.0
 
May 20, 2019, 1 a.m. 3.2 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 55.0 ppb (42) 0.11 ppb (1) 7.0 μg/m3 (6) N/A 42.0
 
May 20, 2019, midnight 3.4 ppb (3) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 55.0 ppb (42) 0.12 ppb (1) 13.0 μg/m3 (12) N/A 42.0
 
May 19, 2019, 11 p.m. 2.1 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A N/A 53.0 ppb (41) 0.12 ppb (1) 56.0 μg/m3 (50) N/A 50.0
 
May 19, 2019, 10 p.m. 2.7 ppb (3) 1.1 ppb (1) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) 0.12 ppb (1) 1.0 μg/m3 (1) N/A 38.0
 
May 19, 2019, 9 p.m. 2.8 ppb (3) 1.2 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) 0.12 ppb (1) 3.0 μg/m3 (3) N/A 36.0
 
May 19, 2019, 8 p.m. 2.8 ppb (3) 1.8 ppb (2) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) 0.14 ppb (2) 1.0 μg/m3 (1) N/A 34.0
 
May 19, 2019, 7 p.m. 2.6 ppb (2) 1.3 ppb (1) N/A 1.0 ppb (1) N/A N/A 44.0 ppb (34) 0.13 ppb (1) 62.0 μg/m3 (54) N/A 54.0
 
May 19, 2019, 6 p.m. 3.4 ppb (3) 1.4 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) 0.14 ppb (2) 19.0 μg/m3 (17) N/A 35.0
 
May 19, 2019, 5 p.m. 2.3 ppb (2) 1.1 ppb (1) N/A 1.0 ppb (1) N/A N/A 49.0 ppb (38) 0.11 ppb (1) 62.0 μg/m3 (54) N/A 54.0
 
May 19, 2019, 4 p.m. 4.9 ppb (5) 1.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) 0.13 ppb (1) 1.0 μg/m3 (1) N/A 38.0
 
May 19, 2019, 3 p.m. 6.8 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 45.0 ppb (35) 0.14 ppb (2) 15.0 μg/m3 (14) N/A 35.0
 
May 19, 2019, 2 p.m. 3.8 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (35) 0.12 ppb (1) 1.0 μg/m3 (1) N/A 35.0
 
May 19, 2019, 1 p.m. 3.0 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 45.0 ppb (35) 0.12 ppb (1) 0.0 μg/m3 (0) N/A 35.0
 
May 19, 2019, noon 2.9 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) 0.12 ppb (1) -2.0 μg/m3 (0) N/A 34.0
 
May 19, 2019, 11 a.m. 4.4 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) 0.11 ppb (1) 0.0 μg/m3 (0) N/A 31.0
 
May 19, 2019, 10 a.m. 5.9 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) 0.13 ppb (1) -1.0 μg/m3 (0) N/A 29.0
 
May 19, 2019, 9 a.m. 4.8 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.11 ppb (1) 9.0 μg/m3 (8) N/A 28.0
 
May 19, 2019, 8 a.m. 5.9 ppb (5) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) 0.14 ppb (2) 13.0 μg/m3 (12) N/A 29.0
 
May 19, 2019, 7 a.m. 5.4 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (30) 0.13 ppb (1) 14.0 μg/m3 (13) N/A 30.0
 
May 19, 2019, 6 a.m. 6.6 ppb (6) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A 39.0 ppb (30) 0.14 ppb (2) 16.0 μg/m3 (15) N/A 30.0
 
May 19, 2019, 5 a.m. 7.3 ppb (7) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A 38.0 ppb (29) 0.15 ppb (2) 17.0 μg/m3 (15) N/A 29.0
 
May 19, 2019, 4 a.m. 9.2 ppb (9) 0.9 ppb (1) N/A 8.0 ppb (7) N/A N/A 40.0 ppb (31) 0.16 ppb (2) 28.0 μg/m3 (25) N/A 31.0
 
May 19, 2019, 3 a.m. 8.2 ppb (8) 0.9 ppb (1) N/A 7.0 ppb (6) N/A N/A 45.0 ppb (35) 0.17 ppb (2) 24.0 μg/m3 (22) N/A 35.0
 
May 19, 2019, 2 a.m. 7.7 ppb (7) 0.8 ppb (1) N/A 7.0 ppb (6) N/A N/A 51.0 ppb (39) 0.16 ppb (2) 32.0 μg/m3 (29) N/A 39.0
 
May 19, 2019, 1 a.m. 6.1 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 59.0 ppb (45) 0.15 ppb (2) 95.0 μg/m3 (70) N/A 70.0
 
May 19, 2019, midnight 5.8 ppb (5) 1.1 ppb (1) N/A 5.0 ppb (5) N/A N/A 61.0 ppb (47) 0.14 ppb (2) 20.0 μg/m3 (18) N/A 47.0
 
May 18, 2019, 11 p.m. 4.2 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 67.0 ppb (52) 0.14 ppb (2) 17.0 μg/m3 (15) N/A 52.0
 
May 18, 2019, 10 p.m. 3.9 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 69.0 ppb (53) 0.14 ppb (2) 16.0 μg/m3 (15) N/A 53.0
 
May 18, 2019, 9 p.m. 3.6 ppb (3) 1.0 ppb (1) N/A 3.0 ppb (3) N/A N/A 67.0 ppb (52) 0.12 ppb (1) 18.0 μg/m3 (16) N/A 52.0
 
May 18, 2019, 8 p.m. 5.1 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 66.0 ppb (51) 0.13 ppb (1) 14.0 μg/m3 (13) N/A 51.0
 
May 18, 2019, 7 p.m. 9.0 ppb (8) 2.2 ppb (2) N/A 7.0 ppb (6) N/A N/A 61.0 ppb (47) 0.16 ppb (2) 18.0 μg/m3 (16) N/A 47.0
 
May 18, 2019, 6 p.m. 10.9 ppb (10) 2.9 ppb (3) N/A 8.0 ppb (7) N/A N/A 53.0 ppb (41) 0.17 ppb (2) 17.0 μg/m3 (15) N/A 41.0
 
May 18, 2019, 5 p.m. 12.6 ppb (12) 3.5 ppb (3) N/A 9.0 ppb (8) N/A N/A 46.0 ppb (35) 0.18 ppb (2) 16.0 μg/m3 (15) N/A 35.0
 
May 18, 2019, 4 p.m. 15.6 ppb (14) 4.6 ppb (4) N/A 11.0 ppb (10) N/A N/A 37.0 ppb (28) 0.2 ppb (2) 18.0 μg/m3 (16) N/A 28.0
 
May 18, 2019, 3 p.m. 12.1 ppb (11) 4.1 ppb (4) N/A 8.0 ppb (7) N/A N/A 32.0 ppb (25) 0.19 ppb (2) 25.0 μg/m3 (23) N/A 25.0
 
May 18, 2019, 2 p.m. 25.3 ppb (23) 11.0 ppb (10) N/A 14.0 ppb (13) N/A N/A 17.0 ppb (13) 0.22 ppb (2) 5.0 μg/m3 (5) N/A 23.0
 
May 18, 2019, 1 p.m. 23.7 ppb (22) 8.4 ppb (8) N/A 15.0 ppb (14) N/A N/A 8.0 ppb (6) 0.35 ppb (4) 17.0 μg/m3 (15) N/A 22.0
 
May 18, 2019, noon 17.5 ppb (16) 3.2 ppb (3) N/A 14.0 ppb (13) N/A N/A 10.0 ppb (8) 0.26 ppb (3) 16.0 μg/m3 (15) N/A 16.0
 
May 18, 2019, 11 a.m. 11.0 ppb (10) 1.5 ppb (1) N/A 10.0 ppb (9) N/A N/A 15.0 ppb (12) 0.19 ppb (2) 12.0 μg/m3 (11) N/A 12.0
 
May 18, 2019, 10 a.m. 13.5 ppb (12) 1.5 ppb (1) N/A 12.0 ppb (11) N/A N/A 13.0 ppb (10) 0.2 ppb (2) 10.0 μg/m3 (9) N/A 12.0
 
May 18, 2019, 9 a.m. 14.9 ppb (14) 1.5 ppb (1) N/A 13.0 ppb (12) N/A N/A 15.0 ppb (12) 0.23 ppb (3) 13.0 μg/m3 (12) N/A 14.0
 
May 18, 2019, 8 a.m. 16.6 ppb (15) 1.8 ppb (2) N/A 15.0 ppb (14) N/A N/A 17.0 ppb (13) 0.25 ppb (3) 14.0 μg/m3 (13) N/A 15.0
 
May 18, 2019, 7 a.m. 15.0 ppb (14) 1.6 ppb (1) N/A 13.0 ppb (12) N/A N/A 20.0 ppb (15) 0.21 ppb (2) 19.0 μg/m3 (17) N/A 17.0
 
May 18, 2019, 6 a.m. 17.9 ppb (17) 1.5 ppb (1) N/A 16.0 ppb (15) N/A N/A 25.0 ppb (19) 0.25 ppb (3) 21.0 μg/m3 (19) N/A 19.0
 
May 18, 2019, 5 a.m. 16.7 ppb (15) 1.2 ppb (1) N/A 15.0 ppb (14) N/A N/A 32.0 ppb (25) 0.22 ppb (2) 21.0 μg/m3 (19) N/A 25.0
 
May 18, 2019, 4 a.m. 13.6 ppb (13) 1.1 ppb (1) N/A 13.0 ppb (12) N/A N/A 36.0 ppb (28) 0.18 ppb (2) 18.0 μg/m3 (16) N/A 28.0
 
May 18, 2019, 3 a.m. 12.5 ppb (12) 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A 41.0 ppb (32) 0.15 ppb (2) 16.0 μg/m3 (15) N/A 32.0
 
May 18, 2019, 2 a.m. 9.4 ppb (9) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 49.0 ppb (38) 0.14 ppb (2) 39.0 μg/m3 (35) N/A 38.0
 
May 18, 2019, 1 a.m. 7.5 ppb (7) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 57.0 ppb (44) 0.15 ppb (2) 62.0 μg/m3 (54) N/A 54.0
 
May 18, 2019, midnight 7.5 ppb (7) 1.4 ppb (1) N/A 6.0 ppb (6) N/A N/A 62.0 ppb (48) 0.16 ppb (2) 21.0 μg/m3 (19) N/A 48.0
 
May 17, 2019, 11 p.m. 9.0 ppb (8) 1.9 ppb (2) N/A 7.0 ppb (6) N/A N/A 63.0 ppb (48) 0.19 ppb (2) 30.0 μg/m3 (27) N/A 48.0
 
May 17, 2019, 10 p.m. 7.8 ppb (7) 1.7 ppb (2) N/A 6.0 ppb (6) N/A N/A 58.0 ppb (45) 0.16 ppb (2) 20.0 μg/m3 (18) N/A 45.0
 
May 17, 2019, 9 p.m. 6.6 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A N/A 56.0 ppb (43) 0.13 ppb (1) 19.0 μg/m3 (17) N/A 43.0
 
May 17, 2019, 8 p.m. 8.4 ppb (8) 2.7 ppb (3) N/A 6.0 ppb (6) N/A N/A 53.0 ppb (41) 0.13 ppb (1) 22.0 μg/m3 (20) N/A 41.0
 
May 17, 2019, 7 p.m. 7.1 ppb (7) 2.4 ppb (2) N/A 5.0 ppb (5) N/A N/A 50.0 ppb (38) 0.12 ppb (1) 12.0 μg/m3 (11) N/A 38.0
 
May 17, 2019, 6 p.m. 8.3 ppb (8) 3.1 ppb (3) N/A 5.0 ppb (5) N/A N/A 46.0 ppb (35) 0.12 ppb (1) 15.0 μg/m3 (14) N/A 35.0
 
May 17, 2019, 5 p.m. 7.1 ppb (7) 2.6 ppb (2) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) 0.12 ppb (1) 11.0 μg/m3 (10) N/A 34.0
 
May 17, 2019, 4 p.m. 8.5 ppb (8) 3.4 ppb (3) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (30) 0.12 ppb (1) 15.0 μg/m3 (14) N/A 30.0
 
May 17, 2019, 3 p.m. 7.7 ppb (7) 2.3 ppb (2) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) 0.12 ppb (1) 9.0 μg/m3 (8) N/A 27.0
 
May 17, 2019, 2 p.m. 7.6 ppb (7) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A 32.0 ppb (25) 0.12 ppb (1) 9.0 μg/m3 (8) N/A 25.0
 
May 17, 2019, 1 p.m. 5.8 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.12 ppb (1) 11.0 μg/m3 (10) N/A 25.0
 
May 17, 2019, noon 6.7 ppb (6) 1.8 ppb (2) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) 0.14 ppb (2) 10.0 μg/m3 (9) N/A 25.0
 
May 17, 2019, 11 a.m. 5.6 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) 0.12 ppb (1) 10.0 μg/m3 (9) N/A 25.0
 
May 17, 2019, 10 a.m. 4.0 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) 0.11 ppb (1) 9.0 μg/m3 (8) N/A 28.0
 
May 17, 2019, 9 a.m. 5.8 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 37.0 ppb (28) 0.12 ppb (1) 10.0 μg/m3 (9) N/A 28.0
 
May 17, 2019, 8 a.m. 6.0 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (30) 0.12 ppb (1) 14.0 μg/m3 (13) N/A 30.0
 
May 17, 2019, 7 a.m. 6.1 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 41.0 ppb (32) 0.11 ppb (1) 12.0 μg/m3 (11) N/A 32.0
 
May 17, 2019, 6 a.m. 5.3 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 42.0 ppb (32) 0.11 ppb (1) 13.0 μg/m3 (12) N/A 32.0
 
May 17, 2019, 5 a.m. 4.5 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) 0.12 ppb (1) 14.0 μg/m3 (13) N/A 34.0
 
May 17, 2019, 4 a.m. 4.6 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) 0.13 ppb (1) 14.0 μg/m3 (13) N/A 35.0
 
May 17, 2019, 3 a.m. 4.6 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 46.0 ppb (35) 0.12 ppb (1) 12.0 μg/m3 (11) N/A 35.0
 
May 17, 2019, 2 a.m. 4.4 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 47.0 ppb (36) 0.13 ppb (1) 19.0 μg/m3 (17) N/A 36.0
 
May 17, 2019, 1 a.m. 4.3 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) 0.13 ppb (1) 80.0 μg/m3 (62) N/A 62.0
 
May 17, 2019, midnight 3.9 ppb (4) 1.3 ppb (1) N/A 3.0 ppb (3) N/A N/A 52.0 ppb (40) 0.12 ppb (1) 11.0 μg/m3 (10) N/A 40.0
 
May 16, 2019, 11 p.m. 4.1 ppb (4) 1.5 ppb (1) N/A 3.0 ppb (3) N/A N/A 53.0 ppb (41) 0.11 ppb (1) 17.0 μg/m3 (15) N/A 41.0
 
May 16, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (10) N/A 10.0
 
May 16, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (6) N/A 6.0
 
May 16, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (5) N/A 5.0
 
May 16, 2019, 7 p.m. 7.5 ppb (7) 3.3 ppb (3) N/A 4.0 ppb (4) N/A N/A 28.0 ppb (22) 0.16 ppb (2) 1.0 μg/m3 (1) N/A 22.0
 
May 16, 2019, 6 p.m. 8.9 ppb (8) 2.7 ppb (3) N/A 6.0 ppb (6) N/A N/A 25.0 ppb (19) 0.17 ppb (2) 3.0 μg/m3 (3) N/A 19.0
 
May 16, 2019, 5 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (22) 0.16 ppb (2) 3.0 μg/m3 (3) N/A 22.0
 
May 16, 2019, 4 p.m. 7.4 ppb (7) 3.4 ppb (3) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) 0.14 ppb (2) 3.0 μg/m3 (3) N/A 23.0
 
May 16, 2019, 3 p.m. 6.1 ppb (6) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (22) 0.17 ppb (2) 5.0 μg/m3 (5) N/A 22.0
 
May 16, 2019, 2 p.m. 5.2 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (24) 0.12 ppb (1) 13.0 μg/m3 (12) N/A 24.0
 
May 16, 2019, 1 p.m. 3.4 ppb (3) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 34.0 ppb (26) 0.12 ppb (1) 8.0 μg/m3 (7) N/A 26.0
 
May 16, 2019, noon 2.9 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) 0.08 ppb (1) 2.0 μg/m3 (2) N/A 28.0
 
May 16, 2019, 11 a.m. 7.1 ppb (7) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A 24.0 ppb (18) 0.12 ppb (1) 6.0 μg/m3 (5) N/A 18.0
 
May 16, 2019, 10 a.m. 6.1 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 26.0 ppb (20) 0.12 ppb (1) 6.0 μg/m3 (5) N/A 20.0
 
May 16, 2019, 9 a.m. 4.5 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (22) 0.1 ppb (1) 8.0 μg/m3 (7) N/A 22.0
 
May 16, 2019, 8 a.m. 4.7 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 33.0 ppb (25) 0.09 ppb (1) 4.0 μg/m3 (4) N/A 25.0
 
May 16, 2019, 7 a.m. 5.9 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.1 ppb (1) 4.0 μg/m3 (4) N/A 25.0
 
May 16, 2019, 6 a.m. 7.2 ppb (7) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (26) 0.09 ppb (1) 4.0 μg/m3 (4) N/A 26.0
 
May 16, 2019, 5 a.m. 6.4 ppb (6) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 37.0 ppb (28) 0.1 ppb (1) 8.0 μg/m3 (7) N/A 28.0
 
May 16, 2019, 4 a.m. 5.5 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) 0.11 ppb (1) 9.0 μg/m3 (8) N/A 29.0
 
May 16, 2019, 3 a.m. 6.5 ppb (6) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 39.0 ppb (30) 0.12 ppb (1) 24.0 μg/m3 (22) N/A 30.0
 
May 16, 2019, 2 a.m. 9.4 ppb (9) 1.0 ppb (1) N/A 8.0 ppb (7) N/A N/A 42.0 ppb (32) 0.15 ppb (2) 25.0 μg/m3 (23) N/A 32.0
 
May 16, 2019, 1 a.m. 10.6 ppb (10) 1.4 ppb (1) N/A 9.0 ppb (8) N/A N/A 50.0 ppb (38) 0.18 ppb (2) 21.0 μg/m3 (19) N/A 38.0
 
May 16, 2019, midnight 9.5 ppb (9) 1.5 ppb (1) N/A 8.0 ppb (7) N/A N/A 57.0 ppb (44) 0.17 ppb (2) 23.0 μg/m3 (21) N/A 44.0
 
May 15, 2019, 11 p.m. 9.6 ppb (9) 1.8 ppb (2) N/A 8.0 ppb (7) N/A N/A 62.0 ppb (48) 0.18 ppb (2) 26.0 μg/m3 (24) N/A 48.0
 
May 15, 2019, 10 p.m. 9.5 ppb (9) 2.1 ppb (2) N/A 7.0 ppb (6) N/A N/A 64.0 ppb (49) 0.19 ppb (2) 32.0 μg/m3 (29) N/A 49.0
 
May 15, 2019, 9 p.m. 10.3 ppb (10) 2.4 ppb (2) N/A 8.0 ppb (7) N/A N/A 62.0 ppb (48) 0.19 ppb (2) 26.0 μg/m3 (24) N/A 48.0
 
May 15, 2019, 8 p.m. 10.8 ppb (10) 2.7 ppb (3) N/A 8.0 ppb (7) N/A N/A 61.0 ppb (47) 0.2 ppb (2) 23.0 μg/m3 (21) N/A 47.0
 
May 15, 2019, 7 p.m. 14.3 ppb (13) 3.8 ppb (4) N/A 10.0 ppb (9) N/A N/A 52.0 ppb (40) 0.23 ppb (3) 34.0 μg/m3 (31) N/A 40.0
 
May 15, 2019, 6 p.m. 15.2 ppb (14) 4.6 ppb (4) N/A 11.0 ppb (10) N/A N/A 45.0 ppb (35) 0.23 ppb (3) 30.0 μg/m3 (27) N/A 35.0
 
May 15, 2019, 5 p.m. 20.9 ppb (19) 6.5 ppb (6) N/A 14.0 ppb (13) N/A N/A 36.0 ppb (28) 0.25 ppb (3) 32.0 μg/m3 (29) N/A 29.0
 
May 15, 2019, 4 p.m. 23.5 ppb (22) 9.1 ppb (8) N/A 14.0 ppb (13) N/A N/A 31.0 ppb (24) 0.26 ppb (3) 31.0 μg/m3 (28) N/A 28.0
 
May 15, 2019, 3 p.m. 20.4 ppb (19) 5.9 ppb (5) N/A 14.0 ppb (13) N/A N/A 24.0 ppb (18) 0.27 ppb (3) 29.0 μg/m3 (26) N/A 26.0
 
May 15, 2019, 2 p.m. 21.3 ppb (20) 4.8 ppb (4) N/A 17.0 ppb (16) N/A N/A 17.0 ppb (13) 0.27 ppb (3) 26.0 μg/m3 (24) N/A 24.0
 
May 15, 2019, 1 p.m. 22.1 ppb (20) 3.1 ppb (3) N/A 19.0 ppb (18) N/A N/A 13.0 ppb (10) 0.27 ppb (3) 25.0 μg/m3 (23) N/A 23.0
 
May 15, 2019, noon 22.7 ppb (21) 2.2 ppb (2) N/A 21.0 ppb (19) N/A N/A 12.0 ppb (9) 0.26 ppb (3) 22.0 μg/m3 (20) N/A 21.0
 
May 15, 2019, 11 a.m. 19.8 ppb (18) 2.0 ppb (2) N/A 18.0 ppb (17) N/A N/A 15.0 ppb (12) 0.25 ppb (3) 19.0 μg/m3 (17) N/A 18.0
 
May 15, 2019, 10 a.m. 19.9 ppb (18) 1.9 ppb (2) N/A 18.0 ppb (17) N/A N/A 14.0 ppb (11) 0.24 ppb (3) 19.0 μg/m3 (17) N/A 18.0
 
May 15, 2019, 9 a.m. 33.6 ppb (31) 4.3 ppb (4) N/A 29.0 ppb (27) N/A N/A 7.0 ppb (5) 0.23 ppb (3) 18.0 μg/m3 (16) N/A 31.0
 
May 15, 2019, 8 a.m. 24.7 ppb (23) 2.0 ppb (2) N/A 23.0 ppb (21) N/A N/A 15.0 ppb (12) 0.24 ppb (3) 15.0 μg/m3 (14) N/A 23.0
 
May 15, 2019, 7 a.m. 23.8 ppb (22) 1.7 ppb (2) N/A 22.0 ppb (20) N/A N/A 17.0 ppb (13) 0.25 ppb (3) 14.0 μg/m3 (13) N/A 22.0
 
May 15, 2019, 6 a.m. 18.8 ppb (17) 1.5 ppb (1) N/A 17.0 ppb (16) N/A N/A 24.0 ppb (18) 0.23 ppb (3) 16.0 μg/m3 (15) N/A 18.0
 
May 15, 2019, 5 a.m. 15.0 ppb (14) 1.2 ppb (1) N/A 14.0 ppb (13) N/A N/A 34.0 ppb (26) 0.21 ppb (2) 19.0 μg/m3 (17) N/A 26.0
 
May 15, 2019, 4 a.m. 12.2 ppb (11) 1.1 ppb (1) N/A 11.0 ppb (10) N/A N/A 42.0 ppb (32) 0.23 ppb (3) 19.0 μg/m3 (17) N/A 32.0
 
May 15, 2019, 3 a.m. 13.0 ppb (12) 1.3 ppb (1) N/A 12.0 ppb (11) N/A N/A 49.0 ppb (38) 0.24 ppb (3) 26.0 μg/m3 (24) N/A 38.0
 
May 15, 2019, 2 a.m. 13.8 ppb (13) 1.1 ppb (1) N/A 13.0 ppb (12) N/A N/A 60.0 ppb (46) 0.24 ppb (3) 36.0 μg/m3 (33) N/A 46.0
 
May 15, 2019, 1 a.m. 12.0 ppb (11) 1.2 ppb (1) N/A 11.0 ppb (10) N/A N/A 73.0 ppb (57) 0.24 ppb (3) 36.0 μg/m3 (33) N/A 57.0
 
May 15, 2019, midnight 8.6 ppb (8) 1.2 ppb (1) N/A 7.0 ppb (6) N/A N/A 82.0 ppb (64) 0.21 ppb (2) 22.0 μg/m3 (20) N/A 64.0
 
May 14, 2019, 11 p.m. 7.5 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 84.0 ppb (66) 0.2 ppb (2) 20.0 μg/m3 (18) N/A 66.0
 
May 14, 2019, 10 p.m. 8.4 ppb (8) 1.6 ppb (1) N/A 7.0 ppb (6) N/A N/A 82.0 ppb (64) 0.22 ppb (2) 35.0 μg/m3 (32) N/A 64.0
 
May 14, 2019, 9 p.m. 8.1 ppb (8) 1.7 ppb (2) N/A 6.0 ppb (6) N/A N/A 77.0 ppb (60) 0.19 ppb (2) 31.0 μg/m3 (28) N/A 60.0
 
May 14, 2019, 8 p.m. 14.0 ppb (13) 2.9 ppb (3) N/A 11.0 ppb (10) N/A N/A 66.0 ppb (51) 0.25 ppb (3) 30.0 μg/m3 (27) N/A 51.0
 
May 14, 2019, 7 p.m. 18.7 ppb (17) 4.6 ppb (4) N/A 14.0 ppb (13) N/A N/A 55.0 ppb (42) 0.29 ppb (3) 38.0 μg/m3 (35) N/A 42.0
 
May 14, 2019, 6 p.m. 24.2 ppb (22) 7.4 ppb (7) N/A 17.0 ppb (16) N/A N/A 41.0 ppb (32) 0.33 ppb (4) 38.0 μg/m3 (35) N/A 35.0
 
May 14, 2019, 5 p.m. 29.7 ppb (28) 11.5 ppb (11) N/A 18.0 ppb (17) N/A N/A 29.0 ppb (22) 0.32 ppb (4) 44.0 μg/m3 (40) N/A 40.0
 
May 14, 2019, 4 p.m. 21.0 ppb (19) 8.4 ppb (8) N/A 13.0 ppb (12) N/A N/A 27.0 ppb (21) 0.31 ppb (3) 34.0 μg/m3 (31) N/A 31.0
 
May 14, 2019, 3 p.m. 15.5 ppb (14) 5.7 ppb (5) N/A 10.0 ppb (9) N/A N/A 25.0 ppb (19) 0.26 ppb (3) 35.0 μg/m3 (32) N/A 32.0
 
May 14, 2019, 2 p.m. 15.4 ppb (14) 3.7 ppb (3) N/A 12.0 ppb (11) N/A N/A 18.0 ppb (14) 0.28 ppb (3) 23.0 μg/m3 (21) N/A 21.0
 
May 14, 2019, 1 p.m. 14.9 ppb (14) 2.2 ppb (2) N/A 13.0 ppb (12) N/A N/A 16.0 ppb (12) 0.25 ppb (3) 21.0 μg/m3 (19) N/A 19.0
 
May 14, 2019, noon 15.8 ppb (15) 2.0 ppb (2) N/A 14.0 ppb (13) N/A N/A 15.0 ppb (12) 0.25 ppb (3) 22.0 μg/m3 (20) N/A 20.0
 
May 14, 2019, 11 a.m. 17.1 ppb (16) 1.7 ppb (2) N/A 15.0 ppb (14) N/A N/A 15.0 ppb (12) 0.22 ppb (2) 20.0 μg/m3 (18) N/A 18.0