AQSQID: 060658005

Site Name: Mira Loma - Van Buren

Location: Riverside Co, CA

Reporting: True, Located: True

Current AQI: 35.0

Riverside Co CA, US: 33.996387, -117.4925

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 22, 2019, 6 p.m. 5.2 ppb (5) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A 46.0 ppb (35) 0.11 ppb (1) 12.0 μg/m3 (11) 3.6 μg/m3 (15) 35.0
 
March 22, 2019, 5 p.m. 4.8 ppb (4) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) 0.1 ppb (1) 18.0 μg/m3 (16) 4.3 μg/m3 (18) 33.0
 
March 22, 2019, 4 p.m. 8.1 ppb (8) 2.3 ppb (2) N/A 6.0 ppb (6) N/A N/A 38.0 ppb (29) 0.12 ppb (1) 20.0 μg/m3 (18) 6.6 μg/m3 (28) 29.0
 
March 22, 2019, 3 p.m. 22.1 ppb (20) 8.1 ppb (8) N/A 14.0 ppb (13) N/A N/A 21.0 ppb (16) 0.27 ppb (3) 31.0 μg/m3 (28) 8.0 μg/m3 (33) 33.0
 
March 22, 2019, 2 p.m. 62.5 ppb (59) 41.5 ppb (38) N/A 21.0 ppb (19) N/A N/A 3.0 ppb (2) 0.57 ppb (6) 39.0 μg/m3 (35) 5.8 μg/m3 (24) 59.0
 
March 22, 2019, 1 p.m. 35.4 ppb (33) 15.3 ppb (14) N/A 20.0 ppb (19) N/A N/A 2.0 ppb (2) 0.34 ppb (4) 14.0 μg/m3 (13) 5.4 μg/m3 (23) 33.0
 
March 22, 2019, noon 28.6 ppb (26) 10.2 ppb (9) N/A 18.0 ppb (17) N/A N/A 5.0 ppb (4) 0.39 ppb (4) 18.0 μg/m3 (16) 7.8 μg/m3 (32) 32.0
 
March 22, 2019, 11 a.m. 12.4 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A 16.0 ppb (12) 0.18 ppb (2) 10.0 μg/m3 (9) 8.7 μg/m3 (36) 36.0
 
March 22, 2019, 10 a.m. 10.5 ppb (10) 0.9 ppb (1) N/A 10.0 ppb (9) N/A N/A 18.0 ppb (14) 0.18 ppb (2) 18.0 μg/m3 (16) 7.1 μg/m3 (30) 30.0
 
March 22, 2019, 9 a.m. 11.2 ppb (10) 0.8 ppb (1) N/A 10.0 ppb (9) N/A N/A 17.0 ppb (13) 0.19 ppb (2) 15.0 μg/m3 (14) 6.8 μg/m3 (28) 28.0
 
March 22, 2019, 8 a.m. 10.4 ppb (10) 0.8 ppb (1) N/A 10.0 ppb (9) N/A N/A 19.0 ppb (15) 0.17 ppb (2) 21.0 μg/m3 (19) 6.6 μg/m3 (28) 28.0
 
March 22, 2019, 7 a.m. 12.4 ppb (11) 0.8 ppb (1) N/A 12.0 ppb (11) N/A N/A 17.0 ppb (13) 0.19 ppb (2) 12.0 μg/m3 (11) 5.1 μg/m3 (21) 21.0
 
March 22, 2019, 6 a.m. 17.8 ppb (16) 2.9 ppb (3) N/A 15.0 ppb (14) N/A N/A 15.0 ppb (12) 0.22 ppb (2) 15.0 μg/m3 (14) 5.1 μg/m3 (21) 21.0
 
March 22, 2019, 5 a.m. 7.0 ppb (6) 0.4 ppb (0) N/A 7.0 ppb (6) N/A N/A 30.0 ppb (23) 0.14 ppb (2) 11.0 μg/m3 (10) 3.2 μg/m3 (13) 23.0
 
March 22, 2019, 4 a.m. 6.8 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 33.0 ppb (25) 0.14 ppb (2) 11.0 μg/m3 (10) 5.4 μg/m3 (23) 25.0
 
March 22, 2019, 3 a.m. 8.1 ppb (8) 1.1 ppb (1) N/A 7.0 ppb (6) N/A N/A 34.0 ppb (26) 0.16 ppb (2) 10.0 μg/m3 (9) 6.6 μg/m3 (28) 28.0
 
March 22, 2019, 2 a.m. 9.4 ppb (9) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A 37.0 ppb (28) 0.16 ppb (2) 15.0 μg/m3 (14) 3.7 μg/m3 (15) 28.0
 
March 22, 2019, 1 a.m. 7.0 ppb (6) 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A 42.0 ppb (32) 0.13 ppb (1) 11.0 μg/m3 (10) 4.9 μg/m3 (20) 32.0
 
March 22, 2019, midnight 6.1 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 44.0 ppb (34) 0.12 ppb (1) 11.0 μg/m3 (10) 6.8 μg/m3 (28) 34.0
 
March 21, 2019, 11 p.m. 4.4 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 48.0 ppb (37) 0.12 ppb (1) 9.0 μg/m3 (8) 2.6 μg/m3 (11) 37.0
 
March 21, 2019, 10 p.m. 5.5 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 47.0 ppb (36) 0.11 ppb (1) 7.0 μg/m3 (6) -0.1 μg/m3 (0) 36.0
 
March 21, 2019, 9 p.m. 5.1 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) 0.13 ppb (1) 8.0 μg/m3 (7) 3.6 μg/m3 (15) 35.0
 
March 21, 2019, 8 p.m. 6.2 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) 0.12 ppb (1) 11.0 μg/m3 (10) 4.8 μg/m3 (20) 33.0
 
March 21, 2019, 7 p.m. 5.2 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) 0.12 ppb (1) 12.0 μg/m3 (11) 6.1 μg/m3 (25) 34.0
 
March 21, 2019, 6 p.m. 6.4 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 41.0 ppb (32) 0.13 ppb (1) 14.0 μg/m3 (13) 4.6 μg/m3 (19) 32.0
 
March 21, 2019, 5 p.m. 7.8 ppb (7) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A 37.0 ppb (28) 0.15 ppb (2) 20.0 μg/m3 (18) 1.7 μg/m3 (7) 28.0
 
March 21, 2019, 4 p.m. 10.9 ppb (10) 2.5 ppb (2) N/A 8.0 ppb (7) N/A N/A 30.0 ppb (23) 0.17 ppb (2) 18.0 μg/m3 (16) 4.4 μg/m3 (18) 23.0
 
March 21, 2019, 3 p.m. 30.9 ppb (29) 13.2 ppb (12) N/A 18.0 ppb (17) N/A N/A 13.0 ppb (10) 0.34 ppb (4) 32.0 μg/m3 (29) 6.8 μg/m3 (28) 29.0
 
March 21, 2019, 2 p.m. 34.8 ppb (32) 12.3 ppb (11) N/A 22.0 ppb (20) N/A N/A 6.0 ppb (5) 0.37 ppb (4) 20.0 μg/m3 (18) 6.3 μg/m3 (26) 32.0
 
March 21, 2019, 1 p.m. 20.8 ppb (19) 3.0 ppb (3) N/A 18.0 ppb (17) N/A N/A 8.0 ppb (6) 0.28 ppb (3) 11.0 μg/m3 (10) 6.6 μg/m3 (28) 28.0
 
March 21, 2019, noon 15.8 ppb (15) 1.4 ppb (1) N/A 14.0 ppb (13) N/A N/A 12.0 ppb (9) 0.21 ppb (2) 12.0 μg/m3 (11) 6.1 μg/m3 (25) 25.0
 
March 21, 2019, 11 a.m. 10.4 ppb (10) 0.9 ppb (1) N/A 10.0 ppb (9) N/A N/A 20.0 ppb (15) 0.16 ppb (2) 15.0 μg/m3 (14) 4.9 μg/m3 (20) 20.0
 
March 21, 2019, 10 a.m. 8.0 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A 24.0 ppb (18) 0.15 ppb (2) 11.0 μg/m3 (10) 2.7 μg/m3 (11) 18.0
 
March 21, 2019, 9 a.m. 10.6 ppb (10) 1.4 ppb (1) N/A 9.0 ppb (8) N/A N/A 18.0 ppb (14) 0.16 ppb (2) 14.0 μg/m3 (13) 3.1 μg/m3 (13) 14.0
 
March 21, 2019, 8 a.m. 9.8 ppb (9) 0.8 ppb (1) N/A 9.0 ppb (8) N/A N/A 18.0 ppb (14) 0.16 ppb (2) 12.0 μg/m3 (11) 7.6 μg/m3 (32) 32.0
 
March 21, 2019, 7 a.m. 12.8 ppb (12) 0.7 ppb (1) N/A 12.0 ppb (11) N/A N/A 15.0 ppb (12) 0.21 ppb (2) 12.0 μg/m3 (11) 11.4 μg/m3 (48) 48.0
 
March 21, 2019, 6 a.m. 13.2 ppb (12) 1.0 ppb (1) N/A 12.0 ppb (11) N/A N/A 15.0 ppb (12) 0.22 ppb (2) 16.0 μg/m3 (15) 9.2 μg/m3 (38) 38.0
 
March 21, 2019, 5 a.m. 16.7 ppb (15) 1.5 ppb (1) N/A 15.0 ppb (14) N/A N/A 16.0 ppb (12) 0.24 ppb (3) 14.0 μg/m3 (13) 10.4 μg/m3 (43) 43.0
 
March 21, 2019, 4 a.m. 12.7 ppb (12) 0.7 ppb (1) N/A 12.0 ppb (11) N/A N/A 24.0 ppb (18) 0.22 ppb (2) 20.0 μg/m3 (18) 12.1 μg/m3 (50) 50.0
 
March 21, 2019, 3 a.m. 11.7 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A 29.0 ppb (22) 0.16 ppb (2) 6.0 μg/m3 (5) 6.9 μg/m3 (29) 29.0
 
March 21, 2019, 2 a.m. 10.8 ppb (10) 0.7 ppb (1) N/A 10.0 ppb (9) N/A N/A 32.0 ppb (25) 0.18 ppb (2) 8.0 μg/m3 (7) 5.9 μg/m3 (25) 25.0
 
March 21, 2019, 1 a.m. 10.0 ppb (9) 0.8 ppb (1) N/A 9.0 ppb (8) N/A N/A 34.0 ppb (26) 0.16 ppb (2) 9.0 μg/m3 (8) 4.4 μg/m3 (18) 26.0
 
March 21, 2019, midnight 7.6 ppb (7) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 38.0 ppb (29) 0.13 ppb (1) 9.0 μg/m3 (8) 2.1 μg/m3 (9) 29.0
 
March 20, 2019, 11 p.m. 6.9 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 44.0 ppb (34) 0.13 ppb (1) 10.0 μg/m3 (9) 0.9 μg/m3 (4) 34.0
 
March 20, 2019, 10 p.m. 8.6 ppb (8) 1.1 ppb (1) N/A 7.0 ppb (6) N/A N/A 46.0 ppb (35) 0.11 ppb (1) 9.0 μg/m3 (8) 1.4 μg/m3 (6) 35.0
 
March 20, 2019, 9 p.m. 8.4 ppb (8) 1.1 ppb (1) N/A 7.0 ppb (6) N/A N/A 44.0 ppb (34) 0.12 ppb (1) 21.0 μg/m3 (19) 2.9 μg/m3 (12) 34.0
 
March 20, 2019, 8 p.m. 8.3 ppb (8) 1.4 ppb (1) N/A 7.0 ppb (6) N/A N/A 43.0 ppb (33) 0.12 ppb (1) 25.0 μg/m3 (23) 6.3 μg/m3 (26) 33.0
 
March 20, 2019, 7 p.m. 5.7 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 46.0 ppb (35) 0.12 ppb (1) 26.0 μg/m3 (24) 7.1 μg/m3 (30) 35.0
 
March 20, 2019, 6 p.m. 9.2 ppb (9) 2.4 ppb (2) N/A 7.0 ppb (6) N/A N/A 41.0 ppb (32) 0.12 ppb (1) 33.0 μg/m3 (30) 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 5 p.m. 8.6 ppb (8) 1.9 ppb (2) N/A 7.0 ppb (6) N/A N/A 37.0 ppb (28) 0.12 ppb (1) 24.0 μg/m3 (22) 10.4 μg/m3 (43) 43.0
 
March 20, 2019, 4 p.m. 8.5 ppb (8) 1.8 ppb (2) N/A 7.0 ppb (6) N/A N/A 35.0 ppb (27) 0.14 ppb (2) 25.0 μg/m3 (23) 7.3 μg/m3 (30) 30.0
 
March 20, 2019, 3 p.m. 14.3 ppb (13) 2.9 ppb (3) N/A 11.0 ppb (10) N/A N/A 26.0 ppb (20) 0.2 ppb (2) 30.0 μg/m3 (27) 7.5 μg/m3 (31) 31.0
 
March 20, 2019, 2 p.m. 29.2 ppb (27) 7.6 ppb (7) N/A 22.0 ppb (20) N/A N/A 13.0 ppb (10) 0.27 ppb (3) 41.0 μg/m3 (37) 7.3 μg/m3 (30) 37.0
 
March 20, 2019, 1 p.m. 28.8 ppb (27) 4.4 ppb (4) N/A 24.0 ppb (22) N/A N/A 6.0 ppb (5) 0.28 ppb (3) 31.0 μg/m3 (28) 6.4 μg/m3 (27) 28.0
 
March 20, 2019, noon 29.4 ppb (27) 5.3 ppb (5) N/A 24.0 ppb (22) N/A N/A 8.0 ppb (6) 0.24 ppb (3) 24.0 μg/m3 (22) 7.1 μg/m3 (30) 30.0
 
March 20, 2019, 11 a.m. 12.2 ppb (11) 1.4 ppb (1) N/A 11.0 ppb (10) N/A N/A 22.0 ppb (17) 0.13 ppb (1) 18.0 μg/m3 (16) 6.8 μg/m3 (28) 28.0
 
March 20, 2019, 10 a.m. 6.4 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 30.0 ppb (23) 0.09 ppb (1) 17.0 μg/m3 (15) 6.9 μg/m3 (29) 29.0
 
March 20, 2019, 9 a.m. 4.3 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (29) 0.08 ppb (1) 15.0 μg/m3 (14) 9.2 μg/m3 (38) 38.0
 
March 20, 2019, 8 a.m. 5.2 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (30) 0.09 ppb (1) 18.0 μg/m3 (16) 6.9 μg/m3 (29) 30.0
 
March 20, 2019, 7 a.m. 5.5 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 41.0 ppb (32) 0.07 ppb (1) 18.0 μg/m3 (16) 5.4 μg/m3 (23) 32.0
 
March 20, 2019, 6 a.m. 4.7 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) 0.08 ppb (1) 19.0 μg/m3 (17) 10.6 μg/m3 (44) 44.0
 
March 20, 2019, 5 a.m. 5.8 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) 0.1 ppb (1) 19.0 μg/m3 (17) 11.4 μg/m3 (48) 48.0
 
March 20, 2019, 4 a.m. 7.4 ppb (7) 1.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (26) 0.12 ppb (1) 25.0 μg/m3 (23) 11.6 μg/m3 (48) 48.0
 
March 20, 2019, 3 a.m. 10.3 ppb (10) 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A 35.0 ppb (27) 0.15 ppb (2) 30.0 μg/m3 (27) 10.9 μg/m3 (45) 45.0
 
March 20, 2019, 2 a.m. 7.1 ppb (7) 1.4 ppb (1) N/A 6.0 ppb (6) N/A N/A 40.0 ppb (31) 0.13 ppb (1) 23.0 μg/m3 (21) 9.4 μg/m3 (39) 39.0
 
March 20, 2019, 1 a.m. 6.1 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 43.0 ppb (33) 0.14 ppb (2) 44.0 μg/m3 (40) 10.9 μg/m3 (45) 45.0
 
March 20, 2019, midnight 5.8 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 53.0 ppb (41) 0.13 ppb (1) 37.0 μg/m3 (34) 11.1 μg/m3 (46) 46.0
 
March 19, 2019, 11 p.m. 6.9 ppb (6) 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A 56.0 ppb (43) 0.14 ppb (2) 42.0 μg/m3 (38) 12.1 μg/m3 (50) 50.0
 
March 19, 2019, 10 p.m. 6.4 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 57.0 ppb (44) 0.15 ppb (2) 51.0 μg/m3 (46) 13.1 μg/m3 (52) 52.0
 
March 19, 2019, 9 p.m. 7.6 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 56.0 ppb (43) 0.18 ppb (2) 59.0 μg/m3 (52) 17.2 μg/m3 (61) 61.0
 
March 19, 2019, 8 p.m. 10.4 ppb (10) 2.1 ppb (2) N/A 8.0 ppb (7) N/A N/A 54.0 ppb (42) 0.21 ppb (2) 43.0 μg/m3 (39) 13.0 μg/m3 (52) 52.0
 
March 19, 2019, 7 p.m. 12.0 ppb (11) 2.3 ppb (2) N/A 10.0 ppb (9) N/A N/A 51.0 ppb (39) 0.18 ppb (2) 43.0 μg/m3 (39) 12.8 μg/m3 (52) 52.0
 
March 19, 2019, 6 p.m. 26.2 ppb (24) 6.5 ppb (6) N/A 20.0 ppb (19) N/A N/A 41.0 ppb (32) 0.25 ppb (3) 49.0 μg/m3 (45) 19.2 μg/m3 (65) 65.0
 
March 19, 2019, 5 p.m. 49.9 ppb (46) 18.9 ppb (18) N/A 31.0 ppb (29) N/A N/A 22.0 ppb (17) 0.41 ppb (5) 60.0 μg/m3 (52) 14.8 μg/m3 (56) 56.0
 
March 19, 2019, 4 p.m. 97.6 ppb (96) 56.9 ppb (53) N/A 41.0 ppb (38) N/A N/A 8.0 ppb (6) 0.61 ppb (7) 73.0 μg/m3 (59) 24.0 μg/m3 (76) 96.0
 
March 19, 2019, 3 p.m. 93.1 ppb (92) 59.5 ppb (56) N/A 34.0 ppb (31) N/A N/A 5.0 ppb (4) 0.69 ppb (8) 77.0 μg/m3 (61) 20.4 μg/m3 (68) 92.0
 
March 19, 2019, 2 p.m. 98.9 ppb (98) 72.6 ppb (70) N/A 26.0 ppb (24) N/A N/A 2.0 ppb (2) 0.94 ppb (10) 84.0 μg/m3 (64) 20.2 μg/m3 (67) 98.0
 
March 19, 2019, 1 p.m. 55.5 ppb (52) 29.5 ppb (27) N/A 26.0 ppb (24) N/A N/A 2.0 ppb (2) 0.48 ppb (5) 49.0 μg/m3 (45) 14.1 μg/m3 (54) 54.0
 
March 19, 2019, noon 34.4 ppb (32) 11.2 ppb (10) N/A 23.0 ppb (21) N/A N/A 3.0 ppb (2) 0.48 ppb (5) 48.0 μg/m3 (44) 21.0 μg/m3 (69) 69.0
 
March 19, 2019, 11 a.m. 38.8 ppb (36) 15.7 ppb (15) N/A 23.0 ppb (21) N/A N/A 3.0 ppb (2) 0.49 ppb (5) 45.0 μg/m3 (41) 20.5 μg/m3 (68) 68.0
 
March 19, 2019, 10 a.m. 29.5 ppb (27) 5.2 ppb (5) N/A 24.0 ppb (22) N/A N/A 4.0 ppb (3) 0.35 ppb (4) 34.0 μg/m3 (31) 13.8 μg/m3 (54) 54.0
 
March 19, 2019, 9 a.m. 27.9 ppb (26) 4.3 ppb (4) N/A 24.0 ppb (22) N/A N/A 5.0 ppb (4) 0.36 ppb (4) 32.0 μg/m3 (29) 14.8 μg/m3 (56) 56.0
 
March 19, 2019, 8 a.m. 24.3 ppb (23) 3.8 ppb (4) N/A 21.0 ppb (19) N/A N/A 10.0 ppb (8) 0.34 ppb (4) 38.0 μg/m3 (35) 15.8 μg/m3 (58) 58.0
 
March 19, 2019, 7 a.m. 18.9 ppb (18) 2.2 ppb (2) N/A 17.0 ppb (16) N/A N/A 18.0 ppb (14) 0.33 ppb (4) 44.0 μg/m3 (40) 18.3 μg/m3 (63) 63.0
 
March 19, 2019, 6 a.m. 16.9 ppb (16) 1.9 ppb (2) N/A 15.0 ppb (14) N/A N/A 24.0 ppb (18) 0.3 ppb (3) 41.0 μg/m3 (37) 12.8 μg/m3 (52) 52.0
 
March 19, 2019, 5 a.m. 13.4 ppb (12) 0.8 ppb (1) N/A 13.0 ppb (12) N/A N/A 37.0 ppb (28) 0.23 ppb (3) 32.0 μg/m3 (29) 10.4 μg/m3 (43) 43.0
 
March 19, 2019, 4 a.m. 24.4 ppb (23) 3.7 ppb (3) N/A 21.0 ppb (19) N/A N/A 26.0 ppb (20) 0.38 ppb (4) 66.0 μg/m3 (56) 12.1 μg/m3 (50) 56.0
 
March 19, 2019, 3 a.m. 15.5 ppb (14) 1.4 ppb (1) N/A 14.0 ppb (13) N/A N/A 40.0 ppb (31) 0.23 ppb (3) 44.0 μg/m3 (40) 11.6 μg/m3 (48) 48.0
 
March 19, 2019, 2 a.m. 12.7 ppb (12) 1.7 ppb (2) N/A 11.0 ppb (10) N/A N/A 51.0 ppb (39) 0.22 ppb (2) 54.0 μg/m3 (49) 8.1 μg/m3 (34) 49.0
 
March 19, 2019, 1 a.m. 7.8 ppb (7) 0.8 ppb (1) N/A 7.0 ppb (6) N/A N/A 61.0 ppb (47) 0.19 ppb (2) 35.0 μg/m3 (32) 6.1 μg/m3 (25) 47.0
 
March 19, 2019, midnight 6.8 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 64.0 ppb (49) 0.17 ppb (2) 41.0 μg/m3 (37) 8.0 μg/m3 (33) 49.0
 
March 18, 2019, 11 p.m. 6.0 ppb (6) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 66.0 ppb (51) 0.16 ppb (2) 32.0 μg/m3 (29) 8.7 μg/m3 (36) 51.0
 
March 18, 2019, 10 p.m. 5.2 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 61.0 ppb (47) 0.13 ppb (1) 25.0 μg/m3 (23) 8.0 μg/m3 (33) 47.0
 
March 18, 2019, 9 p.m. 8.8 ppb (8) 2.5 ppb (2) N/A 6.0 ppb (6) N/A N/A 60.0 ppb (46) 0.18 ppb (2) 35.0 μg/m3 (32) 5.1 μg/m3 (21) 46.0
 
March 18, 2019, 8 p.m. 5.5 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 57.0 ppb (44) 0.12 ppb (1) 26.0 μg/m3 (24) 2.6 μg/m3 (11) 44.0
 
March 18, 2019, 7 p.m. 5.5 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 55.0 ppb (42) 0.12 ppb (1) 25.0 μg/m3 (23) 5.3 μg/m3 (22) 42.0
 
March 18, 2019, 6 p.m. 8.9 ppb (8) 1.9 ppb (2) N/A 7.0 ppb (6) N/A N/A 47.0 ppb (36) 0.15 ppb (2) 36.0 μg/m3 (33) 6.8 μg/m3 (28) 36.0
 
March 18, 2019, 5 p.m. 18.1 ppb (17) 5.1 ppb (5) N/A 13.0 ppb (12) N/A N/A 35.0 ppb (27) 0.21 ppb (2) 28.0 μg/m3 (25) 7.8 μg/m3 (32) 32.0
 
March 18, 2019, 4 p.m. 41.6 ppb (39) 18.2 ppb (17) N/A 23.0 ppb (21) N/A N/A 19.0 ppb (15) 0.34 ppb (4) 39.0 μg/m3 (35) 8.7 μg/m3 (36) 39.0
 
March 18, 2019, 3 p.m. 94.2 ppb (93) 62.6 ppb (59) N/A 32.0 ppb (30) N/A N/A 5.0 ppb (4) 0.63 ppb (7) 73.0 μg/m3 (59) 17.0 μg/m3 (61) 93.0
 
March 18, 2019, 2 p.m. 89.9 ppb (88) 65.3 ppb (62) N/A 25.0 ppb (23) N/A N/A 3.0 ppb (2) 0.83 ppb (9) 86.0 μg/m3 (66) 17.8 μg/m3 (62) 88.0
 
March 18, 2019, 1 p.m. 69.5 ppb (66) 48.4 ppb (45) N/A 21.0 ppb (19) N/A N/A 2.0 ppb (2) 0.68 ppb (8) 55.0 μg/m3 (50) 12.8 μg/m3 (52) 66.0
 
March 18, 2019, noon 56.1 ppb (52) 33.8 ppb (31) N/A 22.0 ppb (20) N/A N/A 2.0 ppb (2) 0.57 ppb (6) 50.0 μg/m3 (45) 10.9 μg/m3 (45) 52.0
 
March 18, 2019, 11 a.m. 40.8 ppb (38) 20.9 ppb (19) N/A 20.0 ppb (19) N/A N/A 2.0 ppb (2) 0.87 ppb (10) 41.0 μg/m3 (37) 10.9 μg/m3 (45) 45.0
 
March 18, 2019, 10 a.m. 35.0 ppb (32) 14.2 ppb (13) N/A 21.0 ppb (19) N/A N/A 2.0 ppb (2) 0.54 ppb (6) 37.0 μg/m3 (34) 12.3 μg/m3 (51) 51.0
 
March 18, 2019, 9 a.m. 28.6 ppb (26) 5.7 ppb (5) N/A 23.0 ppb (21) N/A N/A 3.0 ppb (2) 0.46 ppb (5) 43.0 μg/m3 (39) 13.1 μg/m3 (52) 52.0
 
March 18, 2019, 8 a.m. 31.7 ppb (29) 7.1 ppb (7) N/A 25.0 ppb (23) N/A N/A 3.0 ppb (2) 0.48 ppb (5) 44.0 μg/m3 (40) 19.5 μg/m3 (66) 66.0
 
March 18, 2019, 7 a.m. 24.2 ppb (22) 2.8 ppb (3) N/A 21.0 ppb (19) N/A N/A 10.0 ppb (8) 0.38 ppb (4) 38.0 μg/m3 (35) 8.7 μg/m3 (36) 36.0
 
March 18, 2019, 6 a.m. 26.8 ppb (25) 3.4 ppb (3) N/A 23.0 ppb (21) N/A N/A 12.0 ppb (9) 0.36 ppb (4) 40.0 μg/m3 (36) 7.8 μg/m3 (32) 36.0
 
March 18, 2019, 5 a.m. 24.2 ppb (22) 1.7 ppb (2) N/A 22.0 ppb (20) N/A N/A 21.0 ppb (16) 0.39 ppb (4) 32.0 μg/m3 (29) 9.2 μg/m3 (38) 38.0
 
March 18, 2019, 4 a.m. 30.3 ppb (28) 2.4 ppb (2) N/A 28.0 ppb (26) N/A N/A 16.0 ppb (12) 0.53 ppb (6) 61.0 μg/m3 (53) 11.9 μg/m3 (50) 53.0
 
March 18, 2019, 3 a.m. 18.8 ppb (17) 2.6 ppb (2) N/A 16.0 ppb (15) N/A N/A 34.0 ppb (26) 0.33 ppb (4) 37.0 μg/m3 (34) 9.2 μg/m3 (38) 38.0
 
March 18, 2019, 2 a.m. 11.7 ppb (11) 0.8 ppb (1) N/A 11.0 ppb (10) N/A N/A 47.0 ppb (36) 0.24 ppb (3) 36.0 μg/m3 (33) 5.6 μg/m3 (23) 36.0
 
March 18, 2019, 1 a.m. 9.8 ppb (9) 0.9 ppb (1) N/A 9.0 ppb (8) N/A N/A 56.0 ppb (43) 0.23 ppb (3) 39.0 μg/m3 (35) 4.4 μg/m3 (18) 43.0
 
March 18, 2019, midnight 5.7 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 56.0 ppb (43) 0.15 ppb (2) 24.0 μg/m3 (22) 2.8 μg/m3 (12) 43.0
 
March 17, 2019, 11 p.m. 2.9 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) 0.1 ppb (1) 15.0 μg/m3 (14) 1.6 μg/m3 (7) 40.0
 
March 17, 2019, 10 p.m. 2.3 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 53.0 ppb (41) 0.09 ppb (1) 24.0 μg/m3 (22) 2.8 μg/m3 (12) 41.0
 
March 17, 2019, 9 p.m. 2.1 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 56.0 ppb (43) 0.09 ppb (1) 51.0 μg/m3 (46) 2.4 μg/m3 (10) 46.0
 
March 17, 2019, 8 p.m. 2.3 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 55.0 ppb (42) 0.09 ppb (1) 19.0 μg/m3 (17) -0.4 μg/m3 (0) 42.0
 
March 17, 2019, 7 p.m. 4.0 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 52.0 ppb (40) 0.1 ppb (1) 26.0 μg/m3 (24) 2.1 μg/m3 (9) 40.0
 
March 17, 2019, 6 p.m. 13.6 ppb (13) 3.6 ppb (3) N/A 10.0 ppb (9) N/A N/A 39.0 ppb (30) 0.23 ppb (3) 31.0 μg/m3 (28) 6.5 μg/m3 (27) 30.0
 
March 17, 2019, 5 p.m. 26.5 ppb (25) 9.8 ppb (9) N/A 17.0 ppb (16) N/A N/A 24.0 ppb (18) 0.27 ppb (3) 42.0 μg/m3 (38) 8.5 μg/m3 (35) 38.0
 
March 17, 2019, 4 p.m. 30.7 ppb (28) 12.6 ppb (12) N/A 18.0 ppb (17) N/A N/A 18.0 ppb (14) 0.28 ppb (3) 28.0 μg/m3 (25) 11.6 μg/m3 (48) 48.0
 
March 17, 2019, 3 p.m. 48.5 ppb (45) 27.3 ppb (25) N/A 21.0 ppb (19) N/A N/A 9.0 ppb (7) 0.46 ppb (5) 47.0 μg/m3 (43) 15.0 μg/m3 (56) 56.0
 
March 17, 2019, 2 p.m. 57.7 ppb (54) 38.3 ppb (35) N/A 19.0 ppb (18) N/A N/A 3.0 ppb (2) 0.61 ppb (7) 44.0 μg/m3 (40) 11.8 μg/m3 (49) 54.0
 
March 17, 2019, 1 p.m. 39.9 ppb (37) 20.7 ppb (19) N/A 19.0 ppb (18) N/A N/A 2.0 ppb (2) 0.45 ppb (5) 30.0 μg/m3 (27) 9.9 μg/m3 (41) 41.0
 
March 17, 2019, noon 38.4 ppb (36) 18.6 ppb (17) N/A 20.0 ppb (19) N/A N/A 2.0 ppb (2) 0.41 ppb (5) 36.0 μg/m3 (33) 10.9 μg/m3 (45) 45.0
 
March 17, 2019, 11 a.m. 40.0 ppb (37) 18.8 ppb (17) N/A 21.0 ppb (19) N/A N/A 2.0 ppb (2) 0.43 ppb (5) 36.0 μg/m3 (33) 10.1 μg/m3 (42) 42.0
 
March 17, 2019, 10 a.m. 36.2 ppb (34) 11.0 ppb (10) N/A 25.0 ppb (23) N/A N/A 3.0 ppb (2) 0.45 ppb (5) 42.0 μg/m3 (38) 9.7 μg/m3 (40) 40.0
 
March 17, 2019, 9 a.m. 26.4 ppb (24) 2.3 ppb (2) N/A 24.0 ppb (22) N/A N/A 7.0 ppb (5) 0.3 ppb (3) 34.0 μg/m3 (31) 10.6 μg/m3 (44) 44.0
 
March 17, 2019, 8 a.m. 26.9 ppb (25) 1.1 ppb (1) N/A 26.0 ppb (24) N/A N/A 10.0 ppb (8) 0.29 ppb (3) 31.0 μg/m3 (28) 10.4 μg/m3 (43) 43.0
 
March 17, 2019, 7 a.m. 13.4 ppb (12) 0.8 ppb (1) N/A 13.0 ppb (12) N/A N/A 24.0 ppb (18) 0.25 ppb (3) 29.0 μg/m3 (26) 8.3 μg/m3 (35) 35.0
 
March 17, 2019, 6 a.m. 17.8 ppb (16) 1.2 ppb (1) N/A 17.0 ppb (16) N/A N/A 21.0 ppb (16) 0.3 ppb (3) 28.0 μg/m3 (25) 7.8 μg/m3 (32) 32.0
 
March 17, 2019, 5 a.m. 19.3 ppb (18) 2.4 ppb (2) N/A 17.0 ppb (16) N/A N/A 24.0 ppb (18) 0.27 ppb (3) 31.0 μg/m3 (28) 7.3 μg/m3 (30) 30.0
 
March 17, 2019, 4 a.m. 16.6 ppb (15) 2.4 ppb (2) N/A 14.0 ppb (13) N/A N/A 31.0 ppb (24) 0.25 ppb (3) 29.0 μg/m3 (26) 5.6 μg/m3 (23) 26.0
 
March 17, 2019, 3 a.m. 10.1 ppb (9) 0.4 ppb (0) N/A 10.0 ppb (9) N/A N/A 39.0 ppb (30) 0.15 ppb (2) 23.0 μg/m3 (21) 1.9 μg/m3 (8) 30.0
 
March 17, 2019, 2 a.m. 3.5 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 48.0 ppb (37) 0.1 ppb (1) 16.0 μg/m3 (15) 0.2 μg/m3 (1) 37.0
 
March 17, 2019, 1 a.m. 3.6 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 50.0 ppb (38) 0.08 ppb (1) 19.0 μg/m3 (17) 2.2 μg/m3 (9) 38.0
 
March 17, 2019, midnight 2.1 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) 0.08 ppb (1) 16.0 μg/m3 (15) 1.4 μg/m3 (6) 40.0
 
March 16, 2019, 11 p.m. 2.6 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) 0.08 ppb (1) 17.0 μg/m3 (15) 2.1 μg/m3 (9) 40.0
 
March 16, 2019, 10 p.m. 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A N/A 53.0 ppb (41) 0.08 ppb (1) 15.0 μg/m3 (14) 3.3 μg/m3 (14) 41.0
 
March 16, 2019, 9 p.m. 2.3 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 52.0 ppb (40) 0.08 ppb (1) 22.0 μg/m3 (20) 4.3 μg/m3 (18) 40.0
 
March 16, 2019, 8 p.m. 2.5 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) 0.09 ppb (1) 22.0 μg/m3 (20) 4.3 μg/m3 (18) 38.0
 
March 16, 2019, 7 p.m. 2.2 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) 0.08 ppb (1) 30.0 μg/m3 (27) 3.1 μg/m3 (13) 38.0
 
March 16, 2019, 6 p.m. 2.5 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) 0.08 ppb (1) 43.0 μg/m3 (39) 2.8 μg/m3 (12) 39.0
 
March 16, 2019, 5 p.m. 3.2 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) 0.09 ppb (1) 26.0 μg/m3 (24) 2.3 μg/m3 (10) 36.0
 
March 16, 2019, 4 p.m. 3.2 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) 0.09 ppb (1) 16.0 μg/m3 (15) 1.1 μg/m3 (5) 36.0
 
March 16, 2019, 3 p.m. 2.9 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) 0.09 ppb (1) 16.0 μg/m3 (15) 1.3 μg/m3 (5) 35.0
 
March 16, 2019, 2 p.m. 3.4 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) 0.09 ppb (1) 26.0 μg/m3 (24) 2.8 μg/m3 (12) 35.0
 
March 16, 2019, 1 p.m. 2.8 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) 0.08 ppb (1) 7.0 μg/m3 (6) 2.4 μg/m3 (10) 35.0
 
March 16, 2019, noon 2.4 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) 0.08 ppb (1) 5.0 μg/m3 (5) 2.4 μg/m3 (10) 36.0
 
March 16, 2019, 11 a.m. 2.4 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) 0.07 ppb (1) 7.0 μg/m3 (6) 3.2 μg/m3 (13) 36.0
 
March 16, 2019, 10 a.m. 2.6 ppb (2) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) 0.07 ppb (1) 9.0 μg/m3 (8) 2.2 μg/m3 (9) 35.0
 
March 16, 2019, 9 a.m. 3.4 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) 0.07 ppb (1) 9.0 μg/m3 (8) 1.5 μg/m3 (6) 35.0
 
March 16, 2019, 8 a.m. 3.6 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (35) 0.08 ppb (1) 4.0 μg/m3 (4) 0.4 μg/m3 (2) 35.0
 
March 16, 2019, 7 a.m. 3.7 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) 0.08 ppb (1) 6.0 μg/m3 (5) 0.4 μg/m3 (2) 35.0
 
March 16, 2019, 6 a.m. 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) 0.08 ppb (1) 11.0 μg/m3 (10) 2.0 μg/m3 (8) 36.0
 
March 16, 2019, 5 a.m. 6.3 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 43.0 ppb (33) 0.1 ppb (1) 12.0 μg/m3 (11) 2.9 μg/m3 (12) 33.0
 
March 16, 2019, 4 a.m. 6.2 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 43.0 ppb (33) 0.1 ppb (1) 11.0 μg/m3 (10) 2.2 μg/m3 (9) 33.0
 
March 16, 2019, 3 a.m. 5.0 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 45.0 ppb (35) 0.09 ppb (1) 11.0 μg/m3 (10) 0.4 μg/m3 (2) 35.0
 
March 16, 2019, 2 a.m. 3.5 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 48.0 ppb (37) 0.08 ppb (1) 16.0 μg/m3 (15) -0.1 μg/m3 (0) 37.0
 
March 16, 2019, 1 a.m. 3.0 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) 0.08 ppb (1) 16.0 μg/m3 (15) -0.3 μg/m3 (0) 38.0
 
March 16, 2019, midnight 2.8 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) 0.08 ppb (1) 16.0 μg/m3 (15) -0.2 μg/m3 (0) 38.0
 
March 15, 2019, 11 p.m. 2.7 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) 0.09 ppb (1) 24.0 μg/m3 (22) -0.4 μg/m3 (0) 37.0
 
March 15, 2019, 10 p.m. 2.9 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) 0.09 ppb (1) 24.0 μg/m3 (22) -0.4 μg/m3 (0) 37.0
 
March 15, 2019, 9 p.m. 3.3 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) 0.09 ppb (1) 20.0 μg/m3 (18) 0.6 μg/m3 (2) 36.0
 
March 15, 2019, 8 p.m. 2.4 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) 0.09 ppb (1) 28.0 μg/m3 (25) 2.3 μg/m3 (10) 36.0
 
March 15, 2019, 7 p.m. 2.8 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) 0.09 ppb (1) 28.0 μg/m3 (25) 3.3 μg/m3 (14) 35.0