AQSQID: 060990005

Site Name: Modesto - 14th Street

Location: Modesto, CA

Reporting: True, Located: True

Current AQI: 21.0

Modesto CA, US: 37.6583, -120.9936

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 26, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 23.0 μg/m3 (21) 2.0 μg/m3 (8) 21.0
 
May 26, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) 0.14 ppb (2) 16.0 μg/m3 (15) 5.0 μg/m3 (21) 30.0
 
May 26, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.14 ppb (2) 14.0 μg/m3 (13) 5.0 μg/m3 (21) 26.0
 
May 26, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.14 ppb (2) 12.0 μg/m3 (11) 5.0 μg/m3 (21) 26.0
 
May 26, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) 0.15 ppb (2) 18.0 μg/m3 (16) 6.0 μg/m3 (25) 25.0
 
May 26, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) 0.17 ppb (2) 29.0 μg/m3 (26) 7.0 μg/m3 (29) 29.0
 
May 26, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) 0.19 ppb (2) 22.0 μg/m3 (20) 7.0 μg/m3 (29) 29.0
 
May 26, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) 0.19 ppb (2) 24.0 μg/m3 (22) 24.0 μg/m3 (76) 76.0
 
May 26, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.2 ppb (2) 26.0 μg/m3 (24) 6.0 μg/m3 (25) 28.0
 
May 26, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) 0.19 ppb (2) 24.0 μg/m3 (22) 4.0 μg/m3 (17) 31.0
 
May 26, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) 0.17 ppb (2) 24.0 μg/m3 (22) 5.0 μg/m3 (21) 38.0
 
May 26, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) 0.17 ppb (2) 23.0 μg/m3 (21) 5.0 μg/m3 (21) 41.0
 
May 26, 2019, midnight N/A N/A N/A N/A N/A N/A 54.0 ppb (42) 0.16 ppb (2) 23.0 μg/m3 (21) 6.0 μg/m3 (25) 42.0
 
May 25, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) 0.16 ppb (2) 23.0 μg/m3 (21) 6.0 μg/m3 (25) 42.0
 
May 25, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) 0.16 ppb (2) 19.0 μg/m3 (17) 9.0 μg/m3 (38) 43.0
 
May 25, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) 0.16 ppb (2) 22.0 μg/m3 (20) 8.0 μg/m3 (33) 43.0
 
May 25, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) 0.17 ppb (2) 16.0 μg/m3 (15) 6.0 μg/m3 (25) 40.0
 
May 25, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) 0.17 ppb (2) 23.0 μg/m3 (21) 7.0 μg/m3 (29) 37.0
 
May 25, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) 0.17 ppb (2) 21.0 μg/m3 (19) 7.0 μg/m3 (29) 35.0
 
May 25, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) 0.16 ppb (2) 21.0 μg/m3 (19) 6.0 μg/m3 (25) 32.0
 
May 25, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.16 ppb (2) 21.0 μg/m3 (19) 8.0 μg/m3 (33) 33.0
 
May 25, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) 0.17 ppb (2) 12.0 μg/m3 (11) 8.0 μg/m3 (33) 33.0
 
May 25, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) 0.17 ppb (2) 14.0 μg/m3 (13) 6.0 μg/m3 (25) 25.0
 
May 25, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) 0.17 ppb (2) 15.0 μg/m3 (14) 2.0 μg/m3 (8) 14.0
 
May 25, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 21.0 μg/m3 (19) N/A 19.0
 
May 25, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) 0.17 ppb (2) 11.0 μg/m3 (10) 3.0 μg/m3 (12) 12.0
 
May 25, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) 0.17 ppb (2) 10.0 μg/m3 (9) 3.0 μg/m3 (12) 14.0
 
May 25, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) 0.2 ppb (2) 10.0 μg/m3 (9) 3.0 μg/m3 (12) 12.0
 
May 25, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.2 ppb (2) 9.0 μg/m3 (8) 4.0 μg/m3 (17) 17.0
 
May 25, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.18 ppb (2) 12.0 μg/m3 (11) 4.0 μg/m3 (17) 19.0
 
May 25, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) 0.19 ppb (2) 14.0 μg/m3 (13) 4.0 μg/m3 (17) 20.0
 
May 25, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.19 ppb (2) 12.0 μg/m3 (11) 3.0 μg/m3 (12) 21.0
 
May 25, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) 0.21 ppb (2) 14.0 μg/m3 (13) 6.0 μg/m3 (25) 27.0
 
May 25, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) 0.25 ppb (3) 20.0 μg/m3 (18) 11.0 μg/m3 (46) 46.0
 
May 25, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) 0.19 ppb (2) 21.0 μg/m3 (19) 15.0 μg/m3 (56) 56.0
 
May 25, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) 0.18 ppb (2) 29.0 μg/m3 (26) 11.0 μg/m3 (46) 46.0
 
May 25, 2019, midnight N/A N/A N/A N/A N/A N/A 57.0 ppb (44) 0.19 ppb (2) 23.0 μg/m3 (21) 12.0 μg/m3 (50) 50.0
 
May 24, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) 0.19 ppb (2) N/A N/A 43.0
 
May 24, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) 0.19 ppb (2) 25.0 μg/m3 (23) 9.0 μg/m3 (38) 41.0
 
May 24, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) 0.19 ppb (2) 22.0 μg/m3 (20) 13.0 μg/m3 (52) 52.0
 
May 24, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) 0.2 ppb (2) 24.0 μg/m3 (22) 12.0 μg/m3 (50) 50.0
 
May 24, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.19 ppb (2) 29.0 μg/m3 (26) 7.0 μg/m3 (29) 29.0
 
May 24, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) 0.21 ppb (2) 25.0 μg/m3 (23) 10.0 μg/m3 (42) 42.0
 
May 24, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) 0.18 ppb (2) 19.0 μg/m3 (17) 11.0 μg/m3 (46) 46.0
 
May 24, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) 0.19 ppb (2) 22.0 μg/m3 (20) 10.0 μg/m3 (42) 42.0
 
May 24, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.2 ppb (2) 23.0 μg/m3 (21) 8.0 μg/m3 (33) 33.0
 
May 24, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) 0.21 ppb (2) 28.0 μg/m3 (25) 13.0 μg/m3 (52) 52.0
 
May 24, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) 0.2 ppb (2) 20.0 μg/m3 (18) 6.0 μg/m3 (25) 25.0
 
May 24, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (13) 6.0 μg/m3 (25) 25.0
 
May 24, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) 0.18 ppb (2) 11.0 μg/m3 (10) 5.0 μg/m3 (21) 21.0
 
May 24, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) 0.18 ppb (2) 11.0 μg/m3 (10) 2.0 μg/m3 (8) 10.0
 
May 24, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) 0.17 ppb (2) 11.0 μg/m3 (10) 4.0 μg/m3 (17) 17.0
 
May 24, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) 0.18 ppb (2) 11.0 μg/m3 (10) 6.0 μg/m3 (25) 25.0
 
May 24, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) 0.18 ppb (2) 16.0 μg/m3 (15) 6.0 μg/m3 (25) 25.0
 
May 24, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) 0.18 ppb (2) 9.0 μg/m3 (8) 2.0 μg/m3 (8) 10.0
 
May 24, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.19 ppb (2) 10.0 μg/m3 (9) 1.0 μg/m3 (4) 15.0
 
May 24, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) 0.21 ppb (2) 12.0 μg/m3 (11) 3.0 μg/m3 (12) 17.0
 
May 24, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) 0.2 ppb (2) 20.0 μg/m3 (18) 4.0 μg/m3 (17) 22.0
 
May 24, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.18 ppb (2) 16.0 μg/m3 (15) 5.0 μg/m3 (21) 26.0
 
May 24, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) 0.17 ppb (2) 14.0 μg/m3 (13) 5.0 μg/m3 (21) 27.0
 
May 24, 2019, midnight N/A N/A N/A N/A N/A N/A 32.0 ppb (25) 0.22 ppb (2) 18.0 μg/m3 (16) 5.0 μg/m3 (21) 25.0
 
May 23, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) 0.18 ppb (2) 19.0 μg/m3 (17) 6.0 μg/m3 (25) 32.0
 
May 23, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) 0.15 ppb (2) 9.0 μg/m3 (8) 3.0 μg/m3 (12) 32.0
 
May 23, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) 0.16 ppb (2) 18.0 μg/m3 (16) 4.0 μg/m3 (17) 34.0
 
May 23, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) 0.17 ppb (2) 19.0 μg/m3 (17) 6.0 μg/m3 (25) 32.0
 
May 23, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) 0.18 ppb (2) 17.0 μg/m3 (15) 8.0 μg/m3 (33) 33.0
 
May 23, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) 0.23 ppb (3) 29.0 μg/m3 (26) 11.0 μg/m3 (46) 46.0
 
May 23, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 29.0 μg/m3 (26) 9.0 μg/m3 (38) 38.0
 
May 23, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) 0.2 ppb (2) 22.0 μg/m3 (20) 7.0 μg/m3 (29) 29.0
 
May 23, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) 0.24 ppb (3) 29.0 μg/m3 (26) 6.0 μg/m3 (25) 26.0
 
May 23, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 8.0 ppb (6) 0.24 ppb (3) 22.0 μg/m3 (20) 5.0 μg/m3 (21) 21.0
 
May 23, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) 0.21 ppb (2) 15.0 μg/m3 (14) 2.0 μg/m3 (8) 14.0
 
May 23, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (13) 3.0 μg/m3 (12) 13.0
 
May 23, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) 0.17 ppb (2) 13.0 μg/m3 (12) 6.0 μg/m3 (25) 25.0
 
May 23, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) 0.19 ppb (2) 15.0 μg/m3 (14) 4.0 μg/m3 (17) 17.0
 
May 23, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) 0.22 ppb (2) 15.0 μg/m3 (14) 1.0 μg/m3 (4) 14.0
 
May 23, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) 0.19 ppb (2) 18.0 μg/m3 (16) 0.0 μg/m3 (0) 16.0
 
May 23, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) 0.17 ppb (2) 14.0 μg/m3 (13) 3.0 μg/m3 (12) 16.0
 
May 23, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) 0.18 ppb (2) 10.0 μg/m3 (9) 4.0 μg/m3 (17) 18.0
 
May 23, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) 0.17 ppb (2) 12.0 μg/m3 (11) 5.0 μg/m3 (21) 21.0
 
May 23, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) 0.19 ppb (2) 14.0 μg/m3 (13) 4.0 μg/m3 (17) 18.0
 
May 23, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.18 ppb (2) 15.0 μg/m3 (14) 2.0 μg/m3 (8) 21.0
 
May 23, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) 0.16 ppb (2) 7.0 μg/m3 (6) 0.0 μg/m3 (0) 25.0
 
May 23, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.16 ppb (2) 7.0 μg/m3 (6) 0.0 μg/m3 (0) 26.0
 
May 23, 2019, midnight N/A N/A N/A N/A N/A N/A 35.0 ppb (27) 0.17 ppb (2) 7.0 μg/m3 (6) 1.0 μg/m3 (4) 27.0
 
May 22, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) 0.16 ppb (2) 8.0 μg/m3 (7) 0.0 μg/m3 (0) 28.0
 
May 22, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.16 ppb (2) 13.0 μg/m3 (12) -1.0 μg/m3 (0) 28.0
 
May 22, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) 0.16 ppb (2) 15.0 μg/m3 (14) -1.0 μg/m3 (0) 28.0
 
May 22, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) 0.17 ppb (2) 10.0 μg/m3 (9) 0.0 μg/m3 (0) 27.0
 
May 22, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.16 ppb (2) 9.0 μg/m3 (8) 0.0 μg/m3 (0) 26.0
 
May 22, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) 0.16 ppb (2) 13.0 μg/m3 (12) 1.0 μg/m3 (4) 23.0
 
May 22, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) 0.17 ppb (2) 23.0 μg/m3 (21) 2.0 μg/m3 (8) 21.0
 
May 22, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.18 ppb (2) 10.0 μg/m3 (9) 1.0 μg/m3 (4) 19.0
 
May 22, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) 0.18 ppb (2) 13.0 μg/m3 (12) 3.0 μg/m3 (12) 17.0
 
May 22, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) 0.17 ppb (2) 11.0 μg/m3 (10) 4.0 μg/m3 (17) 18.0
 
May 22, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.17 ppb (2) 6.0 μg/m3 (5) 1.0 μg/m3 (4) 15.0
 
May 22, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (7) 2.0 μg/m3 (8) 8.0
 
May 22, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.15 ppb (2) 6.0 μg/m3 (5) 0.0 μg/m3 (0) 21.0
 
May 22, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) 0.14 ppb (2) 9.0 μg/m3 (8) -1.0 μg/m3 (0) 25.0
 
May 22, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) 0.14 ppb (2) 12.0 μg/m3 (11) 1.0 μg/m3 (4) 25.0
 
May 22, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.14 ppb (2) 10.0 μg/m3 (9) 2.0 μg/m3 (8) 26.0
 
May 22, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) 0.14 ppb (2) 9.0 μg/m3 (8) 3.0 μg/m3 (12) 25.0
 
May 22, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) 0.15 ppb (2) 16.0 μg/m3 (15) 4.0 μg/m3 (17) 25.0
 
May 22, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.15 ppb (2) 23.0 μg/m3 (21) 6.0 μg/m3 (25) 26.0
 
May 22, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.15 ppb (2) 14.0 μg/m3 (13) 4.0 μg/m3 (17) 26.0
 
May 22, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.15 ppb (2) 22.0 μg/m3 (20) 4.0 μg/m3 (17) 26.0
 
May 22, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.15 ppb (2) 13.0 μg/m3 (12) 2.0 μg/m3 (8) 26.0
 
May 22, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.15 ppb (2) 13.0 μg/m3 (12) 2.0 μg/m3 (8) 26.0
 
May 22, 2019, midnight N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.16 ppb (2) 22.0 μg/m3 (20) 5.0 μg/m3 (21) 26.0
 
May 21, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) 0.18 ppb (2) 27.0 μg/m3 (25) 5.0 μg/m3 (21) 25.0
 
May 21, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) 0.17 ppb (2) 19.0 μg/m3 (17) 2.0 μg/m3 (8) 25.0
 
May 21, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) 0.17 ppb (2) 17.0 μg/m3 (15) 1.0 μg/m3 (4) 22.0
 
May 21, 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) 0.0 μg/m3 (0) 5.0
 
May 21, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 3.0 μg/m3 (12) 12.0
 
May 21, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.19 ppb (2) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 21.0
 
May 21, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.18 ppb (2) 10.0 μg/m3 (9) 2.0 μg/m3 (8) 26.0
 
May 21, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.16 ppb (2) 12.0 μg/m3 (11) 4.0 μg/m3 (17) 26.0
 
May 21, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) 0.16 ppb (2) 12.0 μg/m3 (11) 4.0 μg/m3 (17) 24.0
 
May 21, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.2 ppb (2) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 21.0
 
May 21, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) 0.18 ppb (2) 9.0 μg/m3 (8) 2.0 μg/m3 (8) 17.0
 
May 21, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (6) 3.0 μg/m3 (12) 12.0
 
May 21, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.16 ppb (2) 10.0 μg/m3 (9) 4.0 μg/m3 (17) 21.0
 
May 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) 0.15 ppb (2) 9.0 μg/m3 (8) 3.0 μg/m3 (12) 22.0
 
May 21, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) 0.18 ppb (2) 10.0 μg/m3 (9) 1.0 μg/m3 (4) 19.0
 
May 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A N/A 0.16 ppb (2) 10.0 μg/m3 (9) 1.0 μg/m3 (4) 9.0
 
May 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.17 ppb (2) 12.0 μg/m3 (11) 0.0 μg/m3 (0) 21.0
 
May 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) 0.17 ppb (2) 13.0 μg/m3 (12) 1.0 μg/m3 (4) 22.0
 
May 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) 0.16 ppb (2) 10.0 μg/m3 (9) 1.0 μg/m3 (4) 25.0
 
May 21, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) 0.15 ppb (2) 11.0 μg/m3 (10) 1.0 μg/m3 (4) 28.0
 
May 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.16 ppb (2) 13.0 μg/m3 (12) 2.0 μg/m3 (8) 28.0
 
May 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) 0.17 ppb (2) 17.0 μg/m3 (15) 0.0 μg/m3 (0) 29.0
 
May 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) 0.16 ppb (2) 12.0 μg/m3 (11) 0.0 μg/m3 (0) 31.0
 
May 21, 2019, midnight N/A N/A N/A N/A N/A N/A N/A N/A 15.0 μg/m3 (14) 2.0 μg/m3 (8) 14.0
 
May 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) 0.18 ppb (2) 13.0 μg/m3 (12) 2.0 μg/m3 (8) 35.0
 
May 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) 0.17 ppb (2) 10.0 μg/m3 (9) 0.0 μg/m3 (0) 35.0
 
May 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) 0.16 ppb (2) 8.0 μg/m3 (7) 2.0 μg/m3 (8) 35.0
 
May 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) 0.16 ppb (2) 7.0 μg/m3 (6) 0.0 μg/m3 (0) 33.0
 
May 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) 0.16 ppb (2) 3.0 μg/m3 (3) -1.0 μg/m3 (0) 32.0
 
May 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.17 ppb (2) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 28.0
 
May 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) 0.18 ppb (2) 18.0 μg/m3 (16) 0.0 μg/m3 (0) 25.0
 
May 20, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) 0.2 ppb (2) N/A N/A 22.0
 
May 20, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) 0.24 ppb (3) 17.0 μg/m3 (15) 5.0 μg/m3 (21) 21.0
 
May 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) 0.25 ppb (3) 11.0 μg/m3 (10) 6.0 μg/m3 (25) 25.0
 
May 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 9.0 ppb (7) 0.28 ppb (3) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 21.0
 
May 20, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 7.0 μg/m3 (6) 2.0 μg/m3 (8) 8.0
 
May 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) 0.23 ppb (3) 8.0 μg/m3 (7) -1.0 μg/m3 (0) 8.0
 
May 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 12.0 ppb (9) 0.2 ppb (2) 8.0 μg/m3 (7) -2.0 μg/m3 (0) 9.0
 
May 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.18 ppb (2) 6.0 μg/m3 (5) 1.0 μg/m3 (4) 15.0
 
May 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.2 ppb (2) 10.0 μg/m3 (9) 2.0 μg/m3 (8) 15.0
 
May 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) 0.2 ppb (2) 10.0 μg/m3 (9) 1.0 μg/m3 (4) 18.0
 
May 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) 0.17 ppb (2) 7.0 μg/m3 (6) 2.0 μg/m3 (8) 22.0
 
May 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.18 ppb (2) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 21.0
 
May 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) 0.26 ppb (3) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
May 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) 0.21 ppb (2) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 24.0
 
May 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) 0.17 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 28.0
 
May 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) 0.17 ppb (2) 3.0 μg/m3 (3) 0.0 μg/m3 (0) 30.0
 
May 20, 2019, midnight N/A N/A N/A N/A N/A N/A 40.0 ppb (31) 0.15 ppb (2) 2.0 μg/m3 (2) 0.0 μg/m3 (0) 31.0
 
May 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) 0.16 ppb (2) 5.0 μg/m3 (5) 1.0 μg/m3 (4) 30.0
 
May 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) 0.16 ppb (2) 7.0 μg/m3 (6) 0.0 μg/m3 (0) 32.0
 
May 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) 0.15 ppb (2) 9.0 μg/m3 (8) 0.0 μg/m3 (0) 31.0
 
May 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) 0.15 ppb (2) 7.0 μg/m3 (6) 2.0 μg/m3 (8) 31.0
 
May 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) 0.16 ppb (2) 8.0 μg/m3 (7) 0.0 μg/m3 (0) 30.0
 
May 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) 0.18 ppb (2) 5.0 μg/m3 (5) -1.0 μg/m3 (0) 25.0
 
May 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) 0.18 ppb (2) 8.0 μg/m3 (7) -1.0 μg/m3 (0) 26.0
 
May 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) 0.15 ppb (2) 11.0 μg/m3 (10) 0.0 μg/m3 (0) 27.0
 
May 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) 0.16 ppb (2) 9.0 μg/m3 (8) 0.0 μg/m3 (0) 21.0
 
May 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) 0.15 ppb (2) 9.0 μg/m3 (8) 0.0 μg/m3 (0) 15.0
 
May 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) 0.13 ppb (1) 8.0 μg/m3 (7) 2.0 μg/m3 (8) 16.0