AQSQID: 060771002

Site Name: Stockton - Hazelton Street

Location: Stockton, CA

Reporting: True, Located: True

Current AQI: 21.0

Stockton CA, US: 37.9508, -121.2675

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 23, 2019, 2 p.m. 14.2 ppb (13) 0.8 ppb (1) N/A 13.0 ppb (12) N/A N/A 19.0 ppb (15) 0.24 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 23, 2019, 1 p.m. 8.9 ppb (8) 0.4 ppb (0) N/A 9.0 ppb (8) N/A N/A 25.0 ppb (19) 0.21 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 23, 2019, noon 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
 
March 23, 2019, 11 a.m. 17.0 ppb (16) 4.6 ppb (4) N/A 13.0 ppb (12) N/A N/A 14.0 ppb (11) 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 23, 2019, 10 a.m. 16.8 ppb (16) 4.1 ppb (4) N/A 13.0 ppb (12) N/A N/A 17.0 ppb (13) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 16.0
 
March 23, 2019, 9 a.m. 15.3 ppb (14) 2.6 ppb (2) N/A 13.0 ppb (12) N/A N/A 17.0 ppb (13) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 23, 2019, 8 a.m. 35.1 ppb (32) 7.9 ppb (7) N/A 27.0 ppb (25) N/A N/A 7.0 ppb (5) 0.16 ppb (2) N/A 6.0 μg/m3 (25) 32.0
 
March 23, 2019, 7 a.m. 10.8 ppb (10) 1.2 ppb (1) N/A 10.0 ppb (9) N/A N/A 19.0 ppb (15) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 23, 2019, 6 a.m. 7.5 ppb (7) 0.1 ppb (0) N/A 8.0 ppb (7) N/A N/A 23.0 ppb (18) 0.21 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 23, 2019, 5 a.m. 12.2 ppb (11) 0.5 ppb (0) N/A 12.0 ppb (11) N/A N/A 19.0 ppb (15) 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 23, 2019, 4 a.m. 19.7 ppb (18) 1.0 ppb (1) N/A 19.0 ppb (18) N/A N/A 17.0 ppb (13) 0.27 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 23, 2019, 3 a.m. 17.9 ppb (17) 0.7 ppb (1) N/A 17.0 ppb (16) N/A N/A 17.0 ppb (13) 0.29 ppb (3) N/A 12.0 μg/m3 (50) 50.0
 
March 23, 2019, 2 a.m. 15.8 ppb (15) 0.6 ppb (1) N/A 15.0 ppb (14) N/A N/A 22.0 ppb (17) 0.27 ppb (3) N/A 4.0 μg/m3 (17) 17.0
 
March 23, 2019, 1 a.m. 13.5 ppb (12) 0.9 ppb (1) N/A 13.0 ppb (12) N/A N/A 25.0 ppb (19) 0.24 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 23, 2019, midnight 12.1 ppb (11) 1.5 ppb (1) N/A 11.0 ppb (10) N/A N/A 29.0 ppb (22) 0.23 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
March 22, 2019, 11 p.m. 12.9 ppb (12) 2.4 ppb (2) N/A 11.0 ppb (10) N/A N/A 38.0 ppb (29) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 29.0
 
March 22, 2019, 10 p.m. 10.2 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A 40.0 ppb (31) 0.16 ppb (2) N/A 6.0 μg/m3 (25) 31.0
 
March 22, 2019, 9 p.m. 16.3 ppb (15) 4.1 ppb (4) N/A 12.0 ppb (11) N/A N/A 33.0 ppb (25) 0.19 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 8 p.m. 13.8 ppb (13) 3.6 ppb (3) N/A 10.0 ppb (9) N/A N/A 33.0 ppb (25) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 25.0
 
March 22, 2019, 7 p.m. 12.6 ppb (12) 3.3 ppb (3) N/A 9.0 ppb (8) N/A N/A 32.0 ppb (25) 0.19 ppb (2) N/A 5.0 μg/m3 (21) 25.0
 
March 22, 2019, 6 p.m. 17.7 ppb (16) 4.8 ppb (4) N/A 13.0 ppb (12) N/A N/A 27.0 ppb (21) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 22, 2019, 5 p.m. 29.1 ppb (27) 10.0 ppb (9) N/A 19.0 ppb (18) N/A N/A 17.0 ppb (13) 0.21 ppb (2) N/A 5.0 μg/m3 (21) 27.0
 
March 22, 2019, 4 p.m. 30.0 ppb (28) 10.0 ppb (9) N/A 20.0 ppb (19) N/A N/A 11.0 ppb (8) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 28.0
 
March 22, 2019, 3 p.m. 48.0 ppb (44) 21.0 ppb (19) N/A 27.0 ppb (25) N/A N/A 5.0 ppb (4) 0.29 ppb (3) N/A 7.0 μg/m3 (29) 44.0
 
March 22, 2019, 2 p.m. 75.1 ppb (72) 43.2 ppb (40) N/A 32.0 ppb (30) N/A N/A 1.0 ppb (1) 0.43 ppb (5) N/A 10.0 μg/m3 (42) 72.0
 
March 22, 2019, 1 p.m. 46.7 ppb (43) 17.9 ppb (17) N/A 29.0 ppb (27) N/A N/A 1.0 ppb (1) 0.38 ppb (4) N/A 10.0 μg/m3 (42) 43.0
 
March 22, 2019, noon 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 22, 2019, 11 a.m. 23.7 ppb (22) 3.1 ppb (3) N/A 21.0 ppb (19) N/A N/A 6.0 ppb (5) 0.25 ppb (3) N/A 4.0 μg/m3 (17) 22.0
 
March 22, 2019, 10 a.m. 13.8 ppb (13) 0.8 ppb (1) N/A 13.0 ppb (12) N/A N/A 11.0 ppb (8) 0.28 ppb (3) N/A 5.0 μg/m3 (21) 21.0
 
March 22, 2019, 9 a.m. 26.2 ppb (24) 4.5 ppb (4) N/A 22.0 ppb (20) N/A N/A 6.0 ppb (5) 0.27 ppb (3) N/A 5.0 μg/m3 (21) 24.0
 
March 22, 2019, 8 a.m. 14.8 ppb (14) 0.7 ppb (1) N/A 14.0 ppb (13) N/A N/A 15.0 ppb (12) 0.27 ppb (3) N/A 25.0 μg/m3 (78) 78.0
 
March 22, 2019, 7 a.m. 9.5 ppb (9) 0.6 ppb (1) N/A 9.0 ppb (8) N/A N/A 23.0 ppb (18) 0.22 ppb (2) N/A 4.0 μg/m3 (17) 18.0
 
March 22, 2019, 6 a.m. 9.0 ppb (8) 0.5 ppb (0) N/A 9.0 ppb (8) N/A N/A 27.0 ppb (21) 0.21 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 22, 2019, 5 a.m. 10.1 ppb (9) 0.5 ppb (0) N/A 10.0 ppb (9) N/A N/A 26.0 ppb (20) 0.23 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 22, 2019, 4 a.m. 10.8 ppb (10) 0.8 ppb (1) N/A 10.0 ppb (9) N/A N/A 28.0 ppb (22) 0.19 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 22, 2019, 3 a.m. 9.0 ppb (8) 0.5 ppb (0) N/A 8.0 ppb (7) N/A N/A 32.0 ppb (25) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 25.0
 
March 22, 2019, 2 a.m. 8.5 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 38.0 ppb (29) 0.22 ppb (2) N/A 4.0 μg/m3 (17) 29.0
 
March 22, 2019, 1 a.m. 7.2 ppb (7) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 44.0 ppb (34) 0.18 ppb (2) N/A 2.0 μg/m3 (8) 34.0
 
March 22, 2019, midnight 5.6 ppb (5) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 48.0 ppb (37) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 37.0
 
March 21, 2019, 11 p.m. 5.1 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 48.0 ppb (37) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 37.0
 
March 21, 2019, 10 p.m. 5.2 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 46.0 ppb (35) 0.16 ppb (2) N/A 3.0 μg/m3 (12) 35.0
 
March 21, 2019, 9 p.m. 5.4 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) 0.14 ppb (2) N/A 3.0 μg/m3 (12) 34.0
 
March 21, 2019, 8 p.m. 5.3 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) 0.14 ppb (2) N/A 1.0 μg/m3 (4) 32.0
 
March 21, 2019, 7 p.m. 5.6 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) 0.15 ppb (2) N/A 2.0 μg/m3 (8) 31.0
 
March 21, 2019, 6 p.m. 6.6 ppb (6) 1.9 ppb (2) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) 0.15 ppb (2) N/A 5.0 μg/m3 (21) 27.0
 
March 21, 2019, 5 p.m. 9.4 ppb (9) 3.0 ppb (3) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 24.0
 
March 21, 2019, 4 p.m. 14.1 ppb (13) 4.8 ppb (4) N/A 9.0 ppb (8) N/A N/A 27.0 ppb (21) 0.21 ppb (2) N/A 3.0 μg/m3 (12) 21.0
 
March 21, 2019, 3 p.m. 22.1 ppb (20) 6.4 ppb (6) N/A 16.0 ppb (15) N/A N/A 20.0 ppb (15) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 21, 2019, 2 p.m. 39.9 ppb (37) 8.5 ppb (8) N/A 31.0 ppb (29) N/A N/A 8.0 ppb (6) 0.36 ppb (4) N/A 6.0 μg/m3 (25) 37.0
 
March 21, 2019, 1 p.m. 24.6 ppb (23) 2.7 ppb (3) N/A 22.0 ppb (20) N/A N/A 17.0 ppb (13) 0.28 ppb (3) N/A 3.0 μg/m3 (12) 23.0
 
March 21, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 21, 2019, 11 a.m. 15.9 ppb (15) 0.7 ppb (1) N/A 15.0 ppb (14) N/A N/A 21.0 ppb (16) 0.22 ppb (2) N/A 6.0 μg/m3 (25) 25.0
 
March 21, 2019, 10 a.m. 7.0 ppb (6) 0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A 32.0 ppb (25) 0.18 ppb (2) N/A 4.0 μg/m3 (17) 25.0
 
March 21, 2019, 9 a.m. 7.0 ppb (6) 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A 31.0 ppb (24) 0.18 ppb (2) N/A 4.0 μg/m3 (17) 24.0
 
March 21, 2019, 8 a.m. 6.9 ppb (6) 0.3 ppb (0) N/A 7.0 ppb (6) N/A N/A 33.0 ppb (25) 0.18 ppb (2) N/A 4.0 μg/m3 (17) 25.0
 
March 21, 2019, 7 a.m. 10.7 ppb (10) 0.3 ppb (0) N/A 10.0 ppb (9) N/A N/A 27.0 ppb (21) 0.2 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 21, 2019, 6 a.m. 11.3 ppb (10) 0.6 ppb (1) N/A 11.0 ppb (10) N/A N/A 27.0 ppb (21) 0.24 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 21, 2019, 5 a.m. 8.8 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A N/A 32.0 ppb (25) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 25.0
 
March 21, 2019, 4 a.m. 6.9 ppb (6) 0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 37.0 ppb (28) 0.19 ppb (2) N/A 5.0 μg/m3 (21) 28.0
 
March 21, 2019, 3 a.m. 7.9 ppb (7) 0.2 ppb (0) N/A 8.0 ppb (7) N/A N/A 39.0 ppb (30) 0.19 ppb (2) N/A 7.0 μg/m3 (29) 30.0
 
March 21, 2019, 2 a.m. 9.1 ppb (8) 0.3 ppb (0) N/A 9.0 ppb (8) N/A N/A 37.0 ppb (28) 0.22 ppb (2) N/A 4.0 μg/m3 (17) 28.0
 
March 21, 2019, 1 a.m. 4.4 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) 0.17 ppb (2) N/A 1.0 μg/m3 (4) 32.0
 
March 21, 2019, midnight 8.9 ppb (8) 1.2 ppb (1) N/A 8.0 ppb (7) N/A N/A 39.0 ppb (30) 0.21 ppb (2) N/A 3.0 μg/m3 (12) 30.0
 
March 20, 2019, 11 p.m. 11.5 ppb (11) 2.1 ppb (2) N/A 9.0 ppb (8) N/A N/A 39.0 ppb (30) 0.26 ppb (3) N/A 5.0 μg/m3 (21) 30.0
 
March 20, 2019, 10 p.m. 14.7 ppb (14) 2.8 ppb (3) N/A 12.0 ppb (11) N/A N/A 37.0 ppb (28) 0.2 ppb (2) N/A 3.0 μg/m3 (12) 28.0
 
March 20, 2019, 9 p.m. 7.9 ppb (7) 1.1 ppb (1) N/A 7.0 ppb (6) N/A N/A 42.0 ppb (32) 0.19 ppb (2) N/A 2.0 μg/m3 (8) 32.0
 
March 20, 2019, 8 p.m. 6.0 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 43.0 ppb (33) 0.15 ppb (2) N/A -1.0 μg/m3 (0) 33.0
 
March 20, 2019, 7 p.m. 7.1 ppb (7) 1.8 ppb (2) N/A 5.0 ppb (5) N/A N/A 43.0 ppb (33) 0.14 ppb (2) N/A -2.0 μg/m3 (0) 33.0
 
March 20, 2019, 6 p.m. 10.5 ppb (10) 3.4 ppb (3) N/A 7.0 ppb (6) N/A N/A 38.0 ppb (29) 0.14 ppb (2) N/A -1.0 μg/m3 (0) 29.0
 
March 20, 2019, 5 p.m. 6.1 ppb (6) 1.4 ppb (1) N/A 5.0 ppb (5) N/A N/A 34.0 ppb (26) 0.15 ppb (2) N/A 1.0 μg/m3 (4) 26.0
 
March 20, 2019, 4 p.m. 11.9 ppb (11) 3.3 ppb (3) N/A 9.0 ppb (8) N/A N/A 31.0 ppb (24) 0.14 ppb (2) N/A 3.0 μg/m3 (12) 24.0
 
March 20, 2019, 3 p.m. 13.8 ppb (13) 3.6 ppb (3) N/A 10.0 ppb (9) N/A N/A 26.0 ppb (20) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 20, 2019, 2 p.m. 7.8 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A 27.0 ppb (21) 0.28 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 20, 2019, 1 p.m. 8.6 ppb (8) 0.7 ppb (1) N/A 8.0 ppb (7) N/A N/A 28.0 ppb (22) 0.16 ppb (2) N/A 3.0 μg/m3 (12) 22.0
 
March 20, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (21) 21.0
 
March 20, 2019, 11 a.m. 10.4 ppb (10) 1.1 ppb (1) N/A 9.0 ppb (8) N/A N/A 28.0 ppb (22) 0.14 ppb (2) N/A 4.0 μg/m3 (17) 22.0
 
March 20, 2019, 10 a.m. 16.3 ppb (15) 2.7 ppb (3) N/A 14.0 ppb (13) N/A N/A 28.0 ppb (22) 0.12 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
March 20, 2019, 9 a.m. 15.4 ppb (14) 1.7 ppb (2) N/A 14.0 ppb (13) N/A N/A 26.0 ppb (20) 0.12 ppb (1) N/A 5.0 μg/m3 (21) 21.0
 
March 20, 2019, 8 a.m. 10.6 ppb (10) 0.7 ppb (1) N/A 10.0 ppb (9) N/A N/A 28.0 ppb (22) 0.13 ppb (1) N/A 6.0 μg/m3 (25) 25.0
 
March 20, 2019, 7 a.m. 16.2 ppb (15) 1.6 ppb (1) N/A 15.0 ppb (14) N/A N/A 27.0 ppb (21) 0.14 ppb (2) N/A 4.0 μg/m3 (17) 21.0
 
March 20, 2019, 6 a.m. 10.3 ppb (10) 2.4 ppb (2) N/A 8.0 ppb (7) N/A N/A 38.0 ppb (29) 0.13 ppb (1) N/A 6.0 μg/m3 (25) 29.0
 
March 20, 2019, 5 a.m. 5.3 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 44.0 ppb (34) 0.13 ppb (1) N/A 4.0 μg/m3 (17) 34.0
 
March 20, 2019, 4 a.m. 11.4 ppb (11) 0.6 ppb (1) N/A 11.0 ppb (10) N/A N/A 34.0 ppb (26) 0.19 ppb (2) N/A 4.0 μg/m3 (17) 26.0
 
March 20, 2019, 3 a.m. 14.7 ppb (14) 0.4 ppb (0) N/A 14.0 ppb (13) N/A N/A 33.0 ppb (25) 0.22 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 20, 2019, 2 a.m. 16.3 ppb (15) 0.5 ppb (0) N/A 16.0 ppb (15) N/A N/A 37.0 ppb (28) 0.28 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 1 a.m. 13.3 ppb (12) 0.9 ppb (1) N/A 13.0 ppb (12) N/A N/A 41.0 ppb (32) 0.26 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, midnight 17.9 ppb (17) 2.0 ppb (2) N/A 16.0 ppb (15) N/A N/A 40.0 ppb (31) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 31.0
 
March 19, 2019, 11 p.m. 8.9 ppb (8) 0.7 ppb (1) N/A 8.0 ppb (7) N/A N/A 53.0 ppb (41) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 41.0
 
March 19, 2019, 10 p.m. 6.8 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A N/A 53.0 ppb (41) 0.16 ppb (2) N/A 6.0 μg/m3 (25) 41.0
 
March 19, 2019, 9 p.m. 9.4 ppb (9) 1.4 ppb (1) N/A 8.0 ppb (7) N/A N/A 51.0 ppb (39) 0.16 ppb (2) N/A 5.0 μg/m3 (21) 39.0
 
March 19, 2019, 8 p.m. 9.2 ppb (9) 1.6 ppb (1) N/A 8.0 ppb (7) N/A N/A 45.0 ppb (35) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 35.0
 
March 19, 2019, 7 p.m. 9.1 ppb (8) 1.8 ppb (2) N/A 7.0 ppb (6) N/A N/A 41.0 ppb (32) 0.18 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 6 p.m. 12.7 ppb (12) 2.8 ppb (3) N/A 10.0 ppb (9) N/A N/A 35.0 ppb (27) 0.22 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 5 p.m. 19.4 ppb (18) 4.8 ppb (4) N/A 15.0 ppb (14) N/A N/A 28.0 ppb (22) 0.26 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 4 p.m. 24.5 ppb (23) 6.0 ppb (6) N/A 19.0 ppb (18) N/A N/A 22.0 ppb (17) 0.3 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 3 p.m. 48.5 ppb (45) 18.2 ppb (17) N/A 30.0 ppb (28) N/A N/A 7.0 ppb (5) 0.47 ppb (5) N/A 24.0 μg/m3 (76) 76.0
 
March 19, 2019, 2 p.m. 74.5 ppb (72) 38.3 ppb (35) N/A 36.0 ppb (33) N/A N/A 2.0 ppb (2) 0.55 ppb (6) N/A 18.0 μg/m3 (63) 72.0
 
March 19, 2019, 1 p.m. 73.7 ppb (71) 38.8 ppb (36) N/A 35.0 ppb (32) N/A N/A 1.0 ppb (1) 0.57 ppb (6) N/A 16.0 μg/m3 (59) 71.0
 
March 19, 2019, noon 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
 
March 19, 2019, 11 a.m. 13.3 ppb (12) 0.5 ppb (0) N/A 13.0 ppb (12) N/A N/A 21.0 ppb (16) 0.21 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 10 a.m. 11.3 ppb (10) 0.5 ppb (0) N/A 11.0 ppb (10) N/A N/A 29.0 ppb (22) 0.18 ppb (2) N/A 7.0 μg/m3 (29) 29.0
 
March 19, 2019, 9 a.m. 6.6 ppb (6) 0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 36.0 ppb (28) 0.17 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 19, 2019, 8 a.m. 7.4 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A 33.0 ppb (25) 0.19 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 19, 2019, 7 a.m. 10.0 ppb (9) 0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A 31.0 ppb (24) 0.22 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 6 a.m. 24.7 ppb (23) 1.8 ppb (2) N/A 23.0 ppb (21) N/A N/A 18.0 ppb (14) 0.34 ppb (4) N/A 21.0 μg/m3 (69) 69.0
 
March 19, 2019, 5 a.m. 22.9 ppb (21) 0.6 ppb (1) N/A 22.0 ppb (20) N/A N/A 27.0 ppb (21) 0.42 ppb (5) N/A 15.0 μg/m3 (56) 56.0
 
March 19, 2019, 4 a.m. 29.7 ppb (28) 0.5 ppb (0) N/A 29.0 ppb (27) N/A N/A 26.0 ppb (20) 0.41 ppb (5) N/A 18.0 μg/m3 (63) 63.0
 
March 19, 2019, 3 a.m. 26.1 ppb (24) 0.5 ppb (0) N/A 26.0 ppb (24) N/A N/A 35.0 ppb (27) 0.39 ppb (4) N/A 15.0 μg/m3 (56) 56.0
 
March 19, 2019, 2 a.m. 19.5 ppb (18) 0.3 ppb (0) N/A 19.0 ppb (18) N/A N/A 48.0 ppb (37) 0.36 ppb (4) N/A 16.0 μg/m3 (59) 59.0
 
March 19, 2019, 1 a.m. 13.3 ppb (12) 0.8 ppb (1) N/A 12.0 ppb (11) N/A N/A 56.0 ppb (43) 0.23 ppb (3) N/A 15.0 μg/m3 (56) 56.0
 
March 19, 2019, midnight 7.7 ppb (7) 0.8 ppb (1) N/A 7.0 ppb (6) N/A N/A 58.0 ppb (45) 0.17 ppb (2) N/A 9.0 μg/m3 (38) 45.0
 
March 18, 2019, 11 p.m. 5.8 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 56.0 ppb (43) 0.15 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 10 p.m. 7.1 ppb (7) 0.8 ppb (1) N/A 6.0 ppb (6) N/A N/A 54.0 ppb (42) 0.15 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 9 p.m. 6.1 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 51.0 ppb (39) 0.14 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 8 p.m. 8.6 ppb (8) 1.2 ppb (1) N/A 7.0 ppb (6) N/A N/A 48.0 ppb (37) 0.16 ppb (2) N/A 13.0 μg/m3 (52) 52.0
 
March 18, 2019, 7 p.m. 12.9 ppb (12) 3.0 ppb (3) N/A 10.0 ppb (9) N/A N/A 37.0 ppb (28) 0.17 ppb (2) N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 6 p.m. 25.1 ppb (23) 8.3 ppb (8) N/A 17.0 ppb (16) N/A N/A 24.0 ppb (18) 0.21 ppb (2) N/A 15.0 μg/m3 (56) 56.0
 
March 18, 2019, 5 p.m. 76.6 ppb (74) 43.5 ppb (40) N/A 33.0 ppb (31) N/A N/A 14.0 ppb (11) 0.42 ppb (5) N/A 23.0 μg/m3 (73) 74.0
 
March 18, 2019, 4 p.m. 135.7 ppb (107) 93.1 ppb (92) N/A 43.0 ppb (40) N/A N/A 4.0 ppb (3) 0.92 ppb (10) N/A 39.0 μg/m3 (109) 109.0
 
March 18, 2019, 3 p.m. 124.2 ppb (104) 92.2 ppb (91) N/A 32.0 ppb (30) N/A N/A 2.0 ppb (2) 0.75 ppb (8) N/A 28.0 μg/m3 (84) 104.0
 
March 18, 2019, 2 p.m. 79.9 ppb (78) 57.6 ppb (54) N/A 22.0 ppb (20) N/A N/A 0.0 ppb (0) 0.54 ppb (6) N/A 14.0 μg/m3 (54) 78.0
 
March 18, 2019, 1 p.m. 77.7 ppb (75) 54.5 ppb (51) N/A 23.0 ppb (21) N/A N/A 0.0 ppb (0) 0.58 ppb (6) N/A 25.0 μg/m3 (78) 78.0
 
March 18, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A N/A 21.0 μg/m3 (69) 69.0
 
March 18, 2019, 11 a.m. 67.2 ppb (64) 39.5 ppb (37) N/A 28.0 ppb (26) N/A N/A 0.0 ppb (0) 0.63 ppb (7) N/A 22.0 μg/m3 (71) 71.0
 
March 18, 2019, 10 a.m. 53.4 ppb (49) 26.8 ppb (25) N/A 27.0 ppb (25) N/A N/A 1.0 ppb (1) 0.6 ppb (7) N/A 30.0 μg/m3 (88) 88.0
 
March 18, 2019, 9 a.m. 57.0 ppb (53) 28.3 ppb (26) N/A 29.0 ppb (27) N/A N/A 1.0 ppb (1) 0.8 ppb (9) N/A 61.0 μg/m3 (153) 153.0
 
March 18, 2019, 8 a.m. 51.6 ppb (48) 18.7 ppb (17) N/A 33.0 ppb (31) N/A N/A 1.0 ppb (1) 0.74 ppb (8) N/A 33.0 μg/m3 (95) 95.0
 
March 18, 2019, 7 a.m. 40.6 ppb (38) 7.4 ppb (7) N/A 33.0 ppb (31) N/A N/A 2.0 ppb (2) 0.69 ppb (8) N/A 26.0 μg/m3 (80) 80.0
 
March 18, 2019, 6 a.m. 47.2 ppb (44) 11.4 ppb (11) N/A 36.0 ppb (33) N/A N/A 4.0 ppb (3) 0.74 ppb (8) N/A 31.0 μg/m3 (90) 90.0
 
March 18, 2019, 5 a.m. 74.7 ppb (72) 29.4 ppb (27) N/A 45.0 ppb (42) N/A N/A 1.0 ppb (1) 1.07 ppb (12) N/A 24.0 μg/m3 (76) 76.0
 
March 18, 2019, 4 a.m. 49.3 ppb (46) 5.3 ppb (5) N/A 44.0 ppb (41) N/A N/A 5.0 ppb (4) 0.81 ppb (9) N/A 19.0 μg/m3 (65) 65.0
 
March 18, 2019, 3 a.m. 34.1 ppb (32) 1.5 ppb (1) N/A 33.0 ppb (31) N/A N/A 16.0 ppb (12) 0.65 ppb (7) N/A 16.0 μg/m3 (59) 59.0
 
March 18, 2019, 2 a.m. 16.9 ppb (16) 0.3 ppb (0) N/A 17.0 ppb (16) N/A N/A 37.0 ppb (28) 0.38 ppb (4) N/A 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 1 a.m. 7.2 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A 50.0 ppb (38) 0.22 ppb (2) N/A 6.0 μg/m3 (25) 38.0
 
March 18, 2019, midnight 4.7 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 53.0 ppb (41) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 41.0
 
March 17, 2019, 11 p.m. 5.6 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 52.0 ppb (40) 0.2 ppb (2) N/A 7.0 μg/m3 (29) 40.0
 
March 17, 2019, 10 p.m. 6.2 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A N/A 56.0 ppb (43) 0.2 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
March 17, 2019, 9 p.m. 6.7 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 56.0 ppb (43) 0.2 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
March 17, 2019, 8 p.m. 9.0 ppb (8) 1.5 ppb (1) N/A 8.0 ppb (7) N/A N/A 50.0 ppb (38) 0.2 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
March 17, 2019, 7 p.m. 12.9 ppb (12) 2.8 ppb (3) N/A 10.0 ppb (9) N/A N/A 41.0 ppb (32) 0.24 ppb (3) N/A 7.0 μg/m3 (29) 32.0
 
March 17, 2019, 6 p.m. 12.1 ppb (11) 2.9 ppb (3) N/A 9.0 ppb (8) N/A N/A 35.0 ppb (27) 0.22 ppb (2) N/A 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 5 p.m. 14.6 ppb (14) 4.5 ppb (4) N/A 10.0 ppb (9) N/A N/A 26.0 ppb (20) 0.21 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
March 17, 2019, 4 p.m. 27.0 ppb (25) 10.9 ppb (10) N/A 16.0 ppb (15) N/A N/A 17.0 ppb (13) 0.25 ppb (3) N/A 35.0 μg/m3 (99) 99.0
 
March 17, 2019, 3 p.m. 57.5 ppb (54) 32.7 ppb (30) N/A 25.0 ppb (23) N/A N/A 5.0 ppb (4) 0.32 ppb (4) N/A 13.0 μg/m3 (52) 54.0
 
March 17, 2019, 2 p.m. 44.0 ppb (41) 21.1 ppb (20) N/A 23.0 ppb (21) N/A N/A 1.0 ppb (1) 0.32 ppb (4) N/A 17.0 μg/m3 (61) 61.0
 
March 17, 2019, 1 p.m. 35.8 ppb (33) 11.2 ppb (10) N/A 25.0 ppb (23) N/A N/A 0.0 ppb (0) 0.29 ppb (3) N/A 14.0 μg/m3 (54) 54.0
 
March 17, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (54) 54.0
 
March 17, 2019, 11 a.m. 42.3 ppb (39) 15.1 ppb (14) N/A 27.0 ppb (25) N/A N/A 2.0 ppb (2) 0.22 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 10 a.m. 25.4 ppb (24) 4.4 ppb (4) N/A 21.0 ppb (19) N/A N/A 4.0 ppb (3) 0.21 ppb (2) N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 9 a.m. 52.8 ppb (49) 19.0 ppb (18) N/A 34.0 ppb (31) N/A N/A 2.0 ppb (2) 0.32 ppb (4) N/A 15.0 μg/m3 (56) 56.0
 
March 17, 2019, 8 a.m. 80.0 ppb (78) 38.8 ppb (36) N/A 41.0 ppb (38) N/A N/A 0.0 ppb (0) 0.53 ppb (6) N/A 13.0 μg/m3 (52) 78.0
 
March 17, 2019, 7 a.m. 38.6 ppb (36) 4.8 ppb (4) N/A 34.0 ppb (31) N/A N/A 3.0 ppb (2) 0.62 ppb (7) N/A 39.0 μg/m3 (109) 109.0
 
March 17, 2019, 6 a.m. 38.6 ppb (36) 5.0 ppb (5) N/A 34.0 ppb (31) N/A N/A 7.0 ppb (5) 0.73 ppb (8) N/A 26.0 μg/m3 (80) 80.0
 
March 17, 2019, 5 a.m. 68.7 ppb (66) 25.4 ppb (24) N/A 43.0 ppb (40) N/A N/A 3.0 ppb (2) 1.22 ppb (14) N/A 26.0 μg/m3 (80) 80.0
 
March 17, 2019, 4 a.m. 36.0 ppb (33) 1.0 ppb (1) N/A 35.0 ppb (32) N/A N/A 13.0 ppb (10) 0.69 ppb (8) N/A 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 3 a.m. 33.1 ppb (31) 1.0 ppb (1) N/A 32.0 ppb (30) N/A N/A 16.0 ppb (12) 0.69 ppb (8) N/A 22.0 μg/m3 (71) 71.0
 
March 17, 2019, 2 a.m. 16.6 ppb (15) 0.5 ppb (0) N/A 16.0 ppb (15) N/A N/A 37.0 ppb (28) 0.41 ppb (5) N/A 7.0 μg/m3 (29) 29.0
 
March 17, 2019, 1 a.m. 8.3 ppb (8) 0.6 ppb (1) N/A 8.0 ppb (7) N/A N/A 49.0 ppb (38) 0.22 ppb (2) N/A 5.0 μg/m3 (21) 38.0
 
March 17, 2019, midnight 5.4 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 52.0 ppb (40) 0.19 ppb (2) N/A 3.0 μg/m3 (12) 40.0
 
March 16, 2019, 11 p.m. 5.2 ppb (5) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 51.0 ppb (39) 0.18 ppb (2) N/A 5.0 μg/m3 (21) 39.0
 
March 16, 2019, 10 p.m. 5.3 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 52.0 ppb (40) 0.18 ppb (2) N/A 4.0 μg/m3 (17) 40.0
 
March 16, 2019, 9 p.m. 5.3 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 51.0 ppb (39) 0.17 ppb (2) N/A 5.0 μg/m3 (21) 39.0
 
March 16, 2019, 8 p.m. 5.8 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 46.0 ppb (35) 0.19 ppb (2) N/A 8.0 μg/m3 (33) 35.0
 
March 16, 2019, 7 p.m. 9.9 ppb (9) 2.2 ppb (2) N/A 8.0 ppb (7) N/A N/A 39.0 ppb (30) 0.23 ppb (3) N/A 10.0 μg/m3 (42) 42.0
 
March 16, 2019, 6 p.m. 16.9 ppb (16) 4.8 ppb (4) N/A 12.0 ppb (11) N/A N/A 30.0 ppb (23) 0.3 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
March 16, 2019, 5 p.m. 28.2 ppb (26) 9.8 ppb (9) N/A 18.0 ppb (17) N/A N/A 23.0 ppb (18) 0.35 ppb (4) N/A 12.0 μg/m3 (50) 50.0
 
March 16, 2019, 4 p.m. 52.2 ppb (48) 25.2 ppb (23) N/A 27.0 ppb (25) N/A N/A 12.0 ppb (9) 0.44 ppb (5) N/A 16.0 μg/m3 (59) 59.0
 
March 16, 2019, 3 p.m. 77.7 ppb (75) 47.4 ppb (44) N/A 30.0 ppb (28) N/A N/A 4.0 ppb (3) 0.64 ppb (7) N/A 24.0 μg/m3 (76) 76.0