AQSQID: 060658001

Site Name: Riverside - Rubidoux

Location: Riverside Co, CA

Reporting: True, Located: True

Current AQI: 52.0

Riverside Co CA, US: 34.0103, -117.4258

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 23, 2019, 1 p.m. 30.0 ppb (28) 12.4 ppb (11) 30.1 ppb (28) 18.0 ppb (17) 17.7 ppb (16) 0.0 ppb (0) 0.0 ppb (0) 0.46 ppb (5) 21.0 μg/m3 (19) 13.0 μg/m3 (52) 52.0
 
March 23, 2019, noon 26.3 ppb (24) 9.0 ppb (8) 23.9 ppb (22) 17.0 ppb (16) 18.5 ppb (17) 0.0 ppb (0) 0.0 ppb (0) 0.4 ppb (4) 25.0 μg/m3 (23) 13.0 μg/m3 (52) 52.0
 
March 23, 2019, 11 a.m. 27.4 ppb (25) 5.4 ppb (5) 24.3 ppb (23) 22.0 ppb (20) 19.7 ppb (18) 0.0 ppb (0) 1.0 ppb (1) 0.34 ppb (4) 23.0 μg/m3 (21) 10.0 μg/m3 (42) 42.0
 
March 23, 2019, 10 a.m. 25.7 ppb (24) 3.6 ppb (3) 21.7 ppb (20) 22.0 ppb (20) 20.1 ppb (19) 0.0 ppb (0) 2.0 ppb (2) 0.34 ppb (4) 20.0 μg/m3 (18) 9.0 μg/m3 (38) 38.0
 
March 23, 2019, 9 a.m. 17.0 ppb (16) 1.3 ppb (1) 17.0 ppb (16) 16.0 ppb (15) 15.9 ppb (15) 0.0 ppb (0) 10.0 ppb (8) 0.34 ppb (4) 25.0 μg/m3 (23) 15.0 μg/m3 (56) 56.0
 
March 23, 2019, 8 a.m. 20.0 ppb (19) 0.9 ppb (1) 20.6 ppb (19) 19.0 ppb (18) 20.4 ppb (19) 0.0 ppb (0) 12.0 ppb (9) 0.33 ppb (4) 26.0 μg/m3 (24) 9.0 μg/m3 (38) 38.0
 
March 23, 2019, 7 a.m. 18.7 ppb (17) 1.1 ppb (1) 19.4 ppb (18) 18.0 ppb (17) 19.0 ppb (18) 0.0 ppb (0) 11.0 ppb (8) 0.41 ppb (5) 22.0 μg/m3 (20) 8.0 μg/m3 (33) 33.0
 
March 23, 2019, 6 a.m. 13.1 ppb (12) 0.7 ppb (1) 12.1 ppb (11) 12.0 ppb (11) 12.1 ppb (11) 0.0 ppb (0) 21.0 ppb (16) 0.29 ppb (3) 20.0 μg/m3 (18) 7.0 μg/m3 (29) 29.0
 
March 23, 2019, 5 a.m. 9.4 ppb (9) 0.5 ppb (0) 8.8 ppb (8) 9.0 ppb (8) 8.8 ppb (8) 0.0 ppb (0) 31.0 ppb (24) 0.2 ppb (2) 18.0 μg/m3 (16) 4.0 μg/m3 (17) 24.0
 
March 23, 2019, 4 a.m. 8.4 ppb (8) 0.4 ppb (0) 7.6 ppb (7) 8.0 ppb (7) 7.6 ppb (7) 0.0 ppb (0) 35.0 ppb (27) 0.2 ppb (2) 16.0 μg/m3 (15) 0.0 μg/m3 (0) 27.0
 
March 23, 2019, 3 a.m. 7.0 ppb (6) 0.4 ppb (0) 6.6 ppb (6) 7.0 ppb (6) 6.5 ppb (6) 0.0 ppb (0) 41.0 ppb (32) 0.17 ppb (2) 13.0 μg/m3 (12) 3.0 μg/m3 (12) 32.0
 
March 23, 2019, 2 a.m. 8.9 ppb (8) 0.4 ppb (0) 8.7 ppb (8) 8.0 ppb (7) 8.6 ppb (8) 0.0 ppb (0) 42.0 ppb (32) 0.2 ppb (2) 24.0 μg/m3 (22) 7.0 μg/m3 (29) 32.0
 
March 23, 2019, 1 a.m. 9.6 ppb (9) 0.6 ppb (1) 10.1 ppb (9) 9.0 ppb (8) 9.8 ppb (9) 0.0 ppb (0) 47.0 ppb (36) 0.22 ppb (2) 27.0 μg/m3 (25) 7.0 μg/m3 (29) 36.0
 
March 23, 2019, midnight 8.9 ppb (8) 0.9 ppb (1) 10.0 ppb (9) 8.0 ppb (7) 9.3 ppb (9) 0.0 ppb (0) 52.0 ppb (40) 0.21 ppb (2) 20.0 μg/m3 (18) 8.0 μg/m3 (33) 40.0
 
March 22, 2019, 11 p.m. 6.6 ppb (6) 1.0 ppb (1) 7.4 ppb (7) 6.0 ppb (6) 6.6 ppb (6) 0.0 ppb (0) 54.0 ppb (42) 0.18 ppb (2) 23.0 μg/m3 (21) 7.0 μg/m3 (29) 42.0
 
March 22, 2019, 10 p.m. 4.5 ppb (4) 0.7 ppb (1) 4.7 ppb (4) 4.0 ppb (4) 4.3 ppb (4) 0.0 ppb (0) 55.0 ppb (42) 0.15 ppb (2) 18.0 μg/m3 (16) 6.0 μg/m3 (25) 42.0
 
March 22, 2019, 9 p.m. 4.3 ppb (4) 0.8 ppb (1) 4.3 ppb (4) 4.0 ppb (4) 3.8 ppb (4) 0.0 ppb (0) 52.0 ppb (40) 0.15 ppb (2) 16.0 μg/m3 (15) 6.0 μg/m3 (25) 40.0
 
March 22, 2019, 8 p.m. 4.4 ppb (4) 0.8 ppb (1) 4.1 ppb (4) 4.0 ppb (4) 3.5 ppb (3) 0.0 ppb (0) 51.0 ppb (39) 0.14 ppb (2) N/A N/A 39.0
 
March 22, 2019, 7 p.m. 4.5 ppb (4) 1.0 ppb (1) 4.1 ppb (4) 4.0 ppb (4) 3.3 ppb (3) 0.0 ppb (0) 49.0 ppb (38) 0.14 ppb (2) N/A N/A 38.0
 
March 22, 2019, 6 p.m. 4.0 ppb (4) 0.9 ppb (1) 3.4 ppb (3) 3.0 ppb (3) 2.8 ppb (3) 0.0 ppb (0) 48.0 ppb (37) 0.14 ppb (2) N/A N/A 37.0
 
March 22, 2019, 5 p.m. 4.7 ppb (4) 1.0 ppb (1) 4.0 ppb (4) 4.0 ppb (4) 3.3 ppb (3) 0.0 ppb (0) 45.0 ppb (35) 0.14 ppb (2) 14.0 μg/m3 (13) 9.0 μg/m3 (38) 38.0
 
March 22, 2019, 4 p.m. 7.7 ppb (7) 1.8 ppb (2) 7.2 ppb (7) 6.0 ppb (6) 5.6 ppb (5) 0.0 ppb (0) 38.0 ppb (29) 0.16 ppb (2) 17.0 μg/m3 (15) 12.0 μg/m3 (50) 50.0
 
March 22, 2019, 3 p.m. 28.0 ppb (26) 12.0 ppb (11) 23.9 ppb (22) 16.0 ppb (15) 13.7 ppb (13) 1.0 ppb (1) 19.0 ppb (15) 0.34 ppb (4) 32.0 μg/m3 (29) 11.0 μg/m3 (46) 46.0
 
March 22, 2019, 2 p.m. 48.3 ppb (45) 22.9 ppb (21) 50.0 ppb (46) 25.0 ppb (23) 26.4 ppb (24) 1.0 ppb (1) 3.0 ppb (2) 0.69 ppb (8) 30.0 μg/m3 (27) 6.0 μg/m3 (25) 46.0
 
March 22, 2019, 1 p.m. 32.8 ppb (30) 8.0 ppb (7) 29.6 ppb (27) 25.0 ppb (23) 22.2 ppb (21) 0.0 ppb (0) 4.0 ppb (3) 0.38 ppb (4) 19.0 μg/m3 (17) 7.0 μg/m3 (29) 30.0
 
March 22, 2019, noon 25.2 ppb (23) 4.7 ppb (4) 21.7 ppb (20) 20.0 ppb (19) 18.2 ppb (17) 0.0 ppb (0) 9.0 ppb (7) 0.25 ppb (3) 17.0 μg/m3 (15) 8.0 μg/m3 (33) 33.0
 
March 22, 2019, 11 a.m. 17.1 ppb (16) 0.8 ppb (1) 15.4 ppb (14) 16.0 ppb (15) 15.2 ppb (14) 0.0 ppb (0) 11.0 ppb (8) 0.21 ppb (2) 18.0 μg/m3 (16) 5.0 μg/m3 (21) 21.0
 
March 22, 2019, 10 a.m. 18.2 ppb (17) 1.4 ppb (1) 17.1 ppb (16) 17.0 ppb (16) 16.5 ppb (15) 0.0 ppb (0) 11.0 ppb (8) 0.21 ppb (2) 13.0 μg/m3 (12) 5.0 μg/m3 (21) 21.0
 
March 22, 2019, 9 a.m. 14.8 ppb (14) 0.8 ppb (1) 14.0 ppb (13) 14.0 ppb (13) 13.6 ppb (13) 0.0 ppb (0) 14.0 ppb (11) 0.22 ppb (2) 19.0 μg/m3 (17) 6.0 μg/m3 (25) 25.0
 
March 22, 2019, 8 a.m. 9.8 ppb (9) 0.6 ppb (1) 8.6 ppb (8) 9.0 ppb (8) 8.5 ppb (8) 0.0 ppb (0) 22.0 ppb (17) 0.19 ppb (2) 15.0 μg/m3 (14) 6.0 μg/m3 (25) 25.0
 
March 22, 2019, 7 a.m. 9.9 ppb (9) 0.6 ppb (1) 9.2 ppb (9) 9.0 ppb (8) 9.2 ppb (9) 0.0 ppb (0) 23.0 ppb (18) 0.25 ppb (3) 16.0 μg/m3 (15) 6.0 μg/m3 (25) 25.0
 
March 22, 2019, 6 a.m. 6.8 ppb (6) 0.4 ppb (0) 5.6 ppb (5) 6.0 ppb (6) 5.6 ppb (5) 0.0 ppb (0) 30.0 ppb (23) 0.24 ppb (3) 13.0 μg/m3 (12) 3.0 μg/m3 (12) 23.0
 
March 22, 2019, 5 a.m. 6.1 ppb (6) 0.4 ppb (0) 4.8 ppb (4) 6.0 ppb (6) 4.7 ppb (4) 0.0 ppb (0) 34.0 ppb (26) 0.17 ppb (2) 11.0 μg/m3 (10) 2.0 μg/m3 (8) 26.0
 
March 22, 2019, 4 a.m. 5.7 ppb (5) 0.4 ppb (0) 4.4 ppb (4) 5.0 ppb (5) 4.3 ppb (4) 0.0 ppb (0) 36.0 ppb (28) 0.16 ppb (2) 10.0 μg/m3 (9) 4.0 μg/m3 (17) 28.0
 
March 22, 2019, 3 a.m. 6.1 ppb (6) 0.4 ppb (0) 4.8 ppb (4) 6.0 ppb (6) 4.7 ppb (4) 0.0 ppb (0) 37.0 ppb (28) 0.18 ppb (2) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 28.0
 
March 22, 2019, 2 a.m. 5.8 ppb (5) 0.4 ppb (0) 4.5 ppb (4) 5.0 ppb (5) 4.4 ppb (4) 0.0 ppb (0) 41.0 ppb (32) 0.17 ppb (2) 10.0 μg/m3 (9) 3.0 μg/m3 (12) 32.0
 
March 22, 2019, 1 a.m. 4.9 ppb (5) 0.4 ppb (0) 3.5 ppb (3) 4.0 ppb (4) 3.4 ppb (3) 0.0 ppb (0) 44.0 ppb (34) 0.16 ppb (2) 8.0 μg/m3 (7) 3.0 μg/m3 (12) 34.0
 
March 22, 2019, midnight 3.8 ppb (4) 0.5 ppb (0) 2.6 ppb (2) 3.0 ppb (3) 2.4 ppb (2) 0.0 ppb (0) 48.0 ppb (37) 0.14 ppb (2) 7.0 μg/m3 (6) 2.0 μg/m3 (8) 37.0
 
March 21, 2019, 11 p.m. 4.5 ppb (4) 0.8 ppb (1) 3.3 ppb (3) 4.0 ppb (4) 2.7 ppb (3) 0.0 ppb (0) 50.0 ppb (38) 0.15 ppb (2) 8.0 μg/m3 (7) 0.0 μg/m3 (0) 38.0
 
March 21, 2019, 10 p.m. 5.0 ppb (5) 1.0 ppb (1) 3.5 ppb (3) 4.0 ppb (4) 2.7 ppb (3) 0.0 ppb (0) 48.0 ppb (37) N/A 6.0 μg/m3 (5) 1.0 μg/m3 (4) 37.0
 
March 21, 2019, 9 p.m. 4.2 ppb (4) 0.9 ppb (1) 2.8 ppb (3) 3.0 ppb (3) 2.1 ppb (2) 0.0 ppb (0) 47.0 ppb (36) 0.15 ppb (2) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 36.0
 
March 21, 2019, 8 p.m. 3.9 ppb (4) 0.8 ppb (1) 2.5 ppb (2) 3.0 ppb (3) 2.0 ppb (2) 0.0 ppb (0) 46.0 ppb (35) 0.16 ppb (2) 16.0 μg/m3 (15) 1.0 μg/m3 (4) 35.0
 
March 21, 2019, 7 p.m. 6.1 ppb (6) 1.4 ppb (1) 4.7 ppb (4) 5.0 ppb (5) 3.6 ppb (3) 0.0 ppb (0) 43.0 ppb (33) 0.16 ppb (2) 14.0 μg/m3 (13) 3.0 μg/m3 (12) 33.0
 
March 21, 2019, 6 p.m. 4.9 ppb (5) 0.9 ppb (1) 3.6 ppb (3) 4.0 ppb (4) 2.9 ppb (3) 0.0 ppb (0) 43.0 ppb (33) 0.16 ppb (2) 13.0 μg/m3 (12) 4.0 μg/m3 (17) 33.0
 
March 21, 2019, 5 p.m. 6.0 ppb (6) 1.2 ppb (1) 4.6 ppb (4) 5.0 ppb (5) 3.7 ppb (3) 0.0 ppb (0) 42.0 ppb (32) 0.17 ppb (2) 19.0 μg/m3 (17) 5.0 μg/m3 (21) 32.0
 
March 21, 2019, 4 p.m. 12.0 ppb (11) 2.4 ppb (2) 10.6 ppb (10) 10.0 ppb (9) 8.4 ppb (8) 0.0 ppb (0) 31.0 ppb (24) 0.23 ppb (3) 15.0 μg/m3 (14) 5.0 μg/m3 (21) 24.0
 
March 21, 2019, 3 p.m. 23.7 ppb (22) 7.1 ppb (7) 22.1 ppb (20) 17.0 ppb (16) 15.6 ppb (14) 0.0 ppb (0) 16.0 ppb (12) 0.31 ppb (3) 16.0 μg/m3 (15) 4.0 μg/m3 (17) 22.0
 
March 21, 2019, 2 p.m. 46.7 ppb (43) 22.1 ppb (20) 45.5 ppb (42) 25.0 ppb (23) 24.0 ppb (22) 0.0 ppb (0) 3.0 ppb (2) 0.43 ppb (5) 21.0 μg/m3 (19) 2.0 μg/m3 (8) 43.0
 
March 21, 2019, 1 p.m. 39.2 ppb (36) 13.4 ppb (12) 40.7 ppb (38) 26.0 ppb (24) 24.4 ppb (23) 0.0 ppb (0) 2.0 ppb (2) 0.35 ppb (4) 19.0 μg/m3 (17) 4.0 μg/m3 (17) 38.0
 
March 21, 2019, noon 24.9 ppb (23) 3.3 ppb (3) 21.7 ppb (20) 22.0 ppb (20) 19.6 ppb (18) 0.0 ppb (0) 3.0 ppb (2) 0.27 ppb (3) 14.0 μg/m3 (13) 5.0 μg/m3 (21) 23.0
 
March 21, 2019, 11 a.m. 11.7 ppb (11) 0.6 ppb (1) 9.5 ppb (9) 11.0 ppb (10) 9.4 ppb (9) 0.0 ppb (0) 17.0 ppb (13) 0.2 ppb (2) 12.0 μg/m3 (11) 4.0 μg/m3 (17) 17.0
 
March 21, 2019, 10 a.m. 10.7 ppb (10) 0.8 ppb (1) 8.5 ppb (8) 10.0 ppb (9) 8.3 ppb (8) 0.0 ppb (0) 17.0 ppb (13) 0.17 ppb (2) 9.0 μg/m3 (8) 4.0 μg/m3 (17) 17.0
 
March 21, 2019, 9 a.m. 10.2 ppb (9) 0.5 ppb (0) 8.1 ppb (8) 10.0 ppb (9) 8.0 ppb (7) 0.0 ppb (0) 18.0 ppb (14) 0.16 ppb (2) 11.0 μg/m3 (10) 7.0 μg/m3 (29) 29.0
 
March 21, 2019, 8 a.m. 9.6 ppb (9) 0.6 ppb (1) 8.3 ppb (8) 9.0 ppb (8) 8.3 ppb (8) 0.0 ppb (0) 20.0 ppb (15) 0.18 ppb (2) 14.0 μg/m3 (13) 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 7 a.m. 10.9 ppb (10) 0.6 ppb (1) 9.3 ppb (9) 10.0 ppb (9) 9.3 ppb (9) 0.0 ppb (0) 17.0 ppb (13) 0.23 ppb (3) 13.0 μg/m3 (12) 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 6 a.m. 11.0 ppb (10) 0.6 ppb (1) 9.3 ppb (9) 10.0 ppb (9) 9.3 ppb (9) 0.0 ppb (0) 20.0 ppb (15) 0.27 ppb (3) 13.0 μg/m3 (12) 6.0 μg/m3 (25) 25.0
 
March 21, 2019, 5 a.m. 13.3 ppb (12) 0.6 ppb (1) 10.0 ppb (9) 13.0 ppb (12) 10.0 ppb (9) 0.0 ppb (0) 22.0 ppb (17) 0.35 ppb (4) 12.0 μg/m3 (11) 4.0 μg/m3 (17) 17.0
 
March 21, 2019, 4 a.m. 12.3 ppb (11) 0.5 ppb (0) 10.3 ppb (10) 12.0 ppb (11) 10.2 ppb (9) 0.0 ppb (0) 26.0 ppb (20) 0.42 ppb (5) 7.0 μg/m3 (6) 4.0 μg/m3 (17) 20.0
 
March 21, 2019, 3 a.m. 8.0 ppb (7) 0.4 ppb (0) 6.3 ppb (6) 8.0 ppb (7) 6.3 ppb (6) 0.0 ppb (0) 34.0 ppb (26) 0.19 ppb (2) 7.0 μg/m3 (6) 3.0 μg/m3 (12) 26.0
 
March 21, 2019, 2 a.m. 8.9 ppb (8) 0.4 ppb (0) 7.2 ppb (7) 8.0 ppb (7) 7.1 ppb (7) 0.0 ppb (0) 34.0 ppb (26) 0.18 ppb (2) 9.0 μg/m3 (8) 4.0 μg/m3 (17) 26.0
 
March 21, 2019, 1 a.m. 8.9 ppb (8) 0.5 ppb (0) 6.9 ppb (6) 8.0 ppb (7) 6.7 ppb (6) 0.0 ppb (0) 35.0 ppb (27) 0.19 ppb (2) 8.0 μg/m3 (7) 5.0 μg/m3 (21) 27.0
 
March 21, 2019, midnight 6.6 ppb (6) 0.5 ppb (0) 4.8 ppb (4) 6.0 ppb (6) 4.6 ppb (4) 0.0 ppb (0) 42.0 ppb (32) 0.17 ppb (2) 10.0 μg/m3 (9) 3.0 μg/m3 (12) 32.0
 
March 20, 2019, 11 p.m. 11.4 ppb (11) 1.0 ppb (1) 9.6 ppb (9) 10.0 ppb (9) 8.9 ppb (8) 0.0 ppb (0) 39.0 ppb (30) 0.19 ppb (2) 10.0 μg/m3 (9) 4.0 μg/m3 (17) 30.0
 
March 20, 2019, 10 p.m. 12.0 ppb (11) 1.8 ppb (2) 10.0 ppb (9) 10.0 ppb (9) 8.7 ppb (8) 0.0 ppb (0) 41.0 ppb (32) 0.18 ppb (2) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 32.0
 
March 20, 2019, 9 p.m. 8.9 ppb (8) 0.7 ppb (1) 7.9 ppb (7) 8.0 ppb (7) 7.3 ppb (7) 0.0 ppb (0) 41.0 ppb (32) 0.17 ppb (2) 21.0 μg/m3 (19) 6.0 μg/m3 (25) 32.0
 
March 20, 2019, 8 p.m. 6.9 ppb (6) 0.9 ppb (1) 6.5 ppb (6) 6.0 ppb (6) 5.8 ppb (5) 0.0 ppb (0) 46.0 ppb (35) 0.16 ppb (2) 25.0 μg/m3 (23) 6.0 μg/m3 (25) 35.0
 
March 20, 2019, 7 p.m. 5.4 ppb (5) 1.1 ppb (1) 5.0 ppb (5) 4.0 ppb (4) 4.2 ppb (4) 0.0 ppb (0) 48.0 ppb (37) 0.15 ppb (2) 26.0 μg/m3 (24) 6.0 μg/m3 (25) 37.0
 
March 20, 2019, 6 p.m. 7.3 ppb (7) 1.5 ppb (1) 6.6 ppb (6) 6.0 ppb (6) 5.4 ppb (5) 0.0 ppb (0) 44.0 ppb (34) 0.16 ppb (2) 18.0 μg/m3 (16) 7.0 μg/m3 (29) 34.0
 
March 20, 2019, 5 p.m. 6.7 ppb (6) 1.3 ppb (1) 6.0 ppb (6) 5.0 ppb (5) 4.9 ppb (5) 0.0 ppb (0) 42.0 ppb (32) 0.16 ppb (2) 22.0 μg/m3 (20) 7.0 μg/m3 (29) 32.0
 
March 20, 2019, 4 p.m. 9.6 ppb (9) 2.4 ppb (2) 8.7 ppb (8) 7.0 ppb (6) 6.5 ppb (6) 0.0 ppb (0) 35.0 ppb (27) 0.2 ppb (2) 26.0 μg/m3 (24) 6.0 μg/m3 (25) 27.0
 
March 20, 2019, 3 p.m. 19.5 ppb (18) 4.0 ppb (4) 18.8 ppb (17) 16.0 ppb (15) 15.3 ppb (14) 0.0 ppb (0) 22.0 ppb (17) 0.28 ppb (3) 28.0 μg/m3 (25) 7.0 μg/m3 (29) 29.0
 
March 20, 2019, 2 p.m. 32.0 ppb (30) 5.9 ppb (5) 30.7 ppb (28) 26.0 ppb (24) 25.2 ppb (23) 0.0 ppb (0) 7.0 ppb (5) 0.45 ppb (5) 35.0 μg/m3 (32) 7.0 μg/m3 (29) 32.0
 
March 20, 2019, 1 p.m. 20.1 ppb (19) 1.1 ppb (1) 20.5 ppb (19) 19.0 ppb (18) 19.8 ppb (18) 0.0 ppb (0) 15.0 ppb (12) 0.29 ppb (3) 27.0 μg/m3 (25) 7.0 μg/m3 (29) 29.0
 
March 20, 2019, noon 16.0 ppb (15) 1.1 ppb (1) 14.0 ppb (13) 15.0 ppb (14) 13.9 ppb (13) 0.0 ppb (0) 20.0 ppb (15) 0.21 ppb (2) 17.0 μg/m3 (15) 6.0 μg/m3 (25) 25.0
 
March 20, 2019, 11 a.m. 7.8 ppb (7) 0.5 ppb (0) 6.7 ppb (6) 7.0 ppb (6) 6.5 ppb (6) 0.0 ppb (0) 31.0 ppb (24) 0.16 ppb (2) 19.0 μg/m3 (17) 4.0 μg/m3 (17) 24.0
 
March 20, 2019, 10 a.m. 6.9 ppb (6) 0.5 ppb (0) 4.9 ppb (5) 6.0 ppb (6) 4.8 ppb (4) 0.0 ppb (0) 34.0 ppb (26) 0.14 ppb (2) 15.0 μg/m3 (14) 5.0 μg/m3 (21) 26.0
 
March 20, 2019, 9 a.m. 4.0 ppb (4) 0.4 ppb (0) 3.1 ppb (3) 4.0 ppb (4) 3.0 ppb (3) 0.0 ppb (0) 40.0 ppb (31) 0.13 ppb (1) 18.0 μg/m3 (16) 7.0 μg/m3 (29) 31.0
 
March 20, 2019, 8 a.m. 4.7 ppb (4) 0.4 ppb (0) 4.3 ppb (4) 4.0 ppb (4) 4.2 ppb (4) 0.0 ppb (0) 41.0 ppb (32) 0.12 ppb (1) 19.0 μg/m3 (17) 7.0 μg/m3 (29) 32.0
 
March 20, 2019, 7 a.m. 4.8 ppb (4) 0.4 ppb (0) 4.0 ppb (4) 4.0 ppb (4) 4.0 ppb (4) 0.0 ppb (0) 43.0 ppb (33) 0.15 ppb (2) 20.0 μg/m3 (18) 9.0 μg/m3 (38) 38.0
 
March 20, 2019, 6 a.m. 7.0 ppb (6) 0.5 ppb (0) 7.0 ppb (6) 7.0 ppb (6) 6.9 ppb (6) 0.0 ppb (0) 38.0 ppb (29) 0.17 ppb (2) 20.0 μg/m3 (18) 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 5 a.m. 9.3 ppb (9) 0.6 ppb (1) 8.6 ppb (8) 9.0 ppb (8) 8.6 ppb (8) 0.0 ppb (0) 33.0 ppb (25) 0.19 ppb (2) 21.0 μg/m3 (19) 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 4 a.m. 6.8 ppb (6) 0.5 ppb (0) 6.5 ppb (6) 6.0 ppb (6) 6.5 ppb (6) 0.0 ppb (0) 37.0 ppb (28) 0.18 ppb (2) 31.0 μg/m3 (28) 13.0 μg/m3 (52) 52.0
 
March 20, 2019, 3 a.m. 9.0 ppb (8) 0.6 ppb (1) 8.7 ppb (8) 8.0 ppb (7) 8.5 ppb (8) 0.0 ppb (0) 37.0 ppb (28) 0.21 ppb (2) 25.0 μg/m3 (23) 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 2 a.m. 7.7 ppb (7) 0.4 ppb (0) 7.3 ppb (7) 7.0 ppb (6) 7.3 ppb (7) 0.0 ppb (0) 41.0 ppb (32) 0.19 ppb (2) 27.0 μg/m3 (25) 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 1 a.m. 6.2 ppb (6) 0.5 ppb (0) 6.2 ppb (6) 6.0 ppb (6) 6.1 ppb (6) 0.0 ppb (0) 46.0 ppb (35) 0.18 ppb (2) 40.0 μg/m3 (36) 11.0 μg/m3 (46) 46.0
 
March 20, 2019, midnight 6.6 ppb (6) 0.7 ppb (1) 7.2 ppb (7) 6.0 ppb (6) 6.8 ppb (6) 0.0 ppb (0) 56.0 ppb (43) 0.18 ppb (2) 38.0 μg/m3 (35) 12.0 μg/m3 (50) 50.0
 
March 19, 2019, 11 p.m. 7.8 ppb (7) 1.0 ppb (1) 8.4 ppb (8) 7.0 ppb (6) 7.7 ppb (7) 0.0 ppb (0) 58.0 ppb (45) 0.19 ppb (2) 40.0 μg/m3 (36) 12.0 μg/m3 (50) 50.0
 
March 19, 2019, 10 p.m. 6.8 ppb (6) 0.9 ppb (1) 8.1 ppb (8) 6.0 ppb (6) 7.4 ppb (7) 0.0 ppb (0) 60.0 ppb (46) 0.19 ppb (2) 48.0 μg/m3 (44) 12.0 μg/m3 (50) 50.0
 
March 19, 2019, 9 p.m. 9.0 ppb (8) 1.3 ppb (1) 10.7 ppb (10) 8.0 ppb (7) 9.8 ppb (9) 1.0 ppb (1) 59.0 ppb (45) 0.25 ppb (3) 72.0 μg/m3 (58) 17.0 μg/m3 (61) 61.0
 
March 19, 2019, 8 p.m. 12.3 ppb (11) 2.3 ppb (2) 13.7 ppb (13) 10.0 ppb (9) 11.8 ppb (11) 1.0 ppb (1) 55.0 ppb (42) 0.25 ppb (3) 49.0 μg/m3 (45) 13.0 μg/m3 (52) 52.0
 
March 19, 2019, 7 p.m. 23.4 ppb (22) 5.0 ppb (5) 24.9 ppb (23) 18.0 ppb (17) 20.1 ppb (19) 1.0 ppb (1) 47.0 ppb (36) 0.28 ppb (3) 52.0 μg/m3 (47) 17.0 μg/m3 (61) 61.0
 
March 19, 2019, 6 p.m. N/A N/A 28.4 ppb (26) N/A 21.6 ppb (20) 1.0 ppb (1) N/A 0.31 ppb (3) 41.0 μg/m3 (37) 15.0 μg/m3 (56) 56.0
 
March 19, 2019, 5 p.m. N/A N/A 34.8 ppb (32) N/A 23.9 ppb (22) 1.0 ppb (1) N/A 0.37 ppb (4) 37.0 μg/m3 (34) 18.0 μg/m3 (63) 63.0
 
March 19, 2019, 4 p.m. N/A N/A 63.0 ppb (60) N/A 34.4 ppb (32) 1.0 ppb (1) N/A 0.5 ppb (6) 50.0 μg/m3 (45) 15.0 μg/m3 (56) 60.0
 
March 19, 2019, 3 p.m. 100.4 ppb (99) 63.4 ppb (60) 98.6 ppb (97) 37.0 ppb (34) 37.8 ppb (35) 1.0 ppb (1) 4.0 ppb (3) 0.66 ppb (7) 64.0 μg/m3 (54) 17.0 μg/m3 (61) 99.0
 
March 19, 2019, 2 p.m. 117.8 ppb (103) 84.4 ppb (82) 116.3 ppb (103) 33.0 ppb (31) 34.8 ppb (32) 1.0 ppb (1) 0.0 ppb (0) 0.84 ppb (9) 75.0 μg/m3 (60) 16.0 μg/m3 (59) 103.0
 
March 19, 2019, 1 p.m. 85.0 ppb (83) 54.5 ppb (51) 72.1 ppb (69) 30.0 ppb (28) 29.2 ppb (27) 1.0 ppb (1) 0.0 ppb (0) 0.62 ppb (7) 47.0 μg/m3 (43) 12.0 μg/m3 (50) 83.0
 
March 19, 2019, noon 83.1 ppb (81) 54.6 ppb (51) 84.0 ppb (82) 28.0 ppb (26) 31.6 ppb (29) 1.0 ppb (1) 0.0 ppb (0) 0.61 ppb (7) 49.0 μg/m3 (45) 12.0 μg/m3 (50) 82.0
 
March 19, 2019, 11 a.m. 70.3 ppb (67) 34.0 ppb (31) 72.5 ppb (70) 36.0 ppb (33) 34.7 ppb (32) 1.0 ppb (1) 0.0 ppb (0) 0.48 ppb (5) 43.0 μg/m3 (39) 16.0 μg/m3 (59) 70.0
 
March 19, 2019, 10 a.m. 49.5 ppb (46) 13.3 ppb (12) 52.4 ppb (49) 36.0 ppb (33) 39.1 ppb (36) 1.0 ppb (1) 0.0 ppb (0) 0.48 ppb (5) 36.0 μg/m3 (33) 16.0 μg/m3 (59) 59.0
 
March 19, 2019, 9 a.m. 40.7 ppb (38) 5.5 ppb (5) 36.4 ppb (34) 35.0 ppb (32) 32.2 ppb (30) 0.0 ppb (0) 3.0 ppb (2) 0.48 ppb (5) 35.0 μg/m3 (32) 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 8 a.m. 38.3 ppb (35) 3.0 ppb (3) 35.4 ppb (33) 35.0 ppb (32) 34.1 ppb (32) 0.0 ppb (0) 3.0 ppb (2) 0.51 ppb (6) 29.0 μg/m3 (26) 13.0 μg/m3 (52) 52.0
 
March 19, 2019, 7 a.m. 24.8 ppb (23) 2.0 ppb (2) 25.4 ppb (24) 23.0 ppb (21) 24.1 ppb (22) 0.0 ppb (0) 19.0 ppb (15) 0.44 ppb (5) 30.0 μg/m3 (27) 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 6 a.m. 18.4 ppb (17) 0.8 ppb (1) 18.8 ppb (17) 18.0 ppb (17) 18.8 ppb (17) 1.0 ppb (1) 28.0 ppb (22) 0.31 ppb (3) 35.0 μg/m3 (32) 9.0 μg/m3 (38) 38.0
 
March 19, 2019, 5 a.m. 24.8 ppb (23) 0.8 ppb (1) 23.7 ppb (22) 24.0 ppb (22) 23.6 ppb (22) 0.0 ppb (0) 29.0 ppb (22) 0.32 ppb (4) 35.0 μg/m3 (32) 7.0 μg/m3 (29) 32.0
 
March 19, 2019, 4 a.m. 28.5 ppb (26) 0.9 ppb (1) 26.7 ppb (25) 28.0 ppb (26) 26.6 ppb (25) 1.0 ppb (1) 26.0 ppb (20) 0.42 ppb (5) 38.0 μg/m3 (35) 5.0 μg/m3 (21) 35.0
 
March 19, 2019, 3 a.m. 13.3 ppb (12) 0.5 ppb (0) 12.5 ppb (12) 13.0 ppb (12) 12.5 ppb (12) 1.0 ppb (1) 47.0 ppb (36) 0.26 ppb (3) 29.0 μg/m3 (26) 5.0 μg/m3 (21) 36.0
 
March 19, 2019, 2 a.m. 9.3 ppb (9) 0.4 ppb (0) 8.7 ppb (8) 9.0 ppb (8) 8.6 ppb (8) 1.0 ppb (1) 57.0 ppb (44) 0.23 ppb (3) 31.0 μg/m3 (28) 6.0 μg/m3 (25) 44.0
 
March 19, 2019, 1 a.m. 7.3 ppb (7) 0.4 ppb (0) 6.8 ppb (6) 7.0 ppb (6) 6.7 ppb (6) 1.0 ppb (1) 62.0 ppb (48) 0.21 ppb (2) 33.0 μg/m3 (30) 6.0 μg/m3 (25) 48.0
 
March 19, 2019, midnight 6.4 ppb (6) 0.6 ppb (1) 6.0 ppb (6) 6.0 ppb (6) 5.6 ppb (5) 1.0 ppb (1) 65.0 ppb (50) 0.19 ppb (2) 41.0 μg/m3 (37) 3.0 μg/m3 (12) 50.0
 
March 18, 2019, 11 p.m. 4.8 ppb (4) 0.6 ppb (1) 4.4 ppb (4) 4.0 ppb (4) 4.0 ppb (4) 1.0 ppb (1) 64.0 ppb (49) 0.15 ppb (2) 31.0 μg/m3 (28) 4.0 μg/m3 (17) 49.0
 
March 18, 2019, 10 p.m. 4.8 ppb (4) 0.6 ppb (1) 4.7 ppb (4) 4.0 ppb (4) 4.3 ppb (4) 1.0 ppb (1) 64.0 ppb (49) 0.17 ppb (2) 25.0 μg/m3 (23) 6.0 μg/m3 (25) 49.0
 
March 18, 2019, 9 p.m. 6.3 ppb (6) 0.9 ppb (1) 6.2 ppb (6) 5.0 ppb (5) 5.5 ppb (5) 1.0 ppb (1) 62.0 ppb (48) 0.17 ppb (2) 32.0 μg/m3 (29) 5.0 μg/m3 (21) 48.0
 
March 18, 2019, 8 p.m. 4.2 ppb (4) 0.7 ppb (1) 3.5 ppb (3) 3.0 ppb (3) 3.1 ppb (3) 0.0 ppb (0) 57.0 ppb (44) 0.13 ppb (1) 18.0 μg/m3 (16) 3.0 μg/m3 (12) 44.0
 
March 18, 2019, 7 p.m. 7.0 ppb (6) 1.3 ppb (1) 6.4 ppb (6) 6.0 ppb (6) 5.2 ppb (5) 1.0 ppb (1) 53.0 ppb (41) 0.16 ppb (2) 16.0 μg/m3 (15) 1.0 μg/m3 (4) 41.0
 
March 18, 2019, 6 p.m. 12.1 ppb (11) 2.5 ppb (2) 11.3 ppb (10) 10.0 ppb (9) 8.9 ppb (8) 1.0 ppb (1) 47.0 ppb (36) 0.19 ppb (2) 21.0 μg/m3 (19) 3.0 μg/m3 (12) 36.0
 
March 18, 2019, 5 p.m. 24.2 ppb (22) 7.3 ppb (7) 23.2 ppb (21) 17.0 ppb (16) 16.0 ppb (15) 1.0 ppb (1) 33.0 ppb (25) 0.25 ppb (3) 26.0 μg/m3 (24) 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 4 p.m. 58.8 ppb (55) 27.9 ppb (26) 57.9 ppb (54) 31.0 ppb (29) 29.9 ppb (28) 1.0 ppb (1) 13.0 ppb (10) 0.39 ppb (4) 48.0 μg/m3 (44) 12.0 μg/m3 (50) 55.0
 
March 18, 2019, 3 p.m. 95.3 ppb (94) 60.7 ppb (57) 93.5 ppb (92) 35.0 ppb (32) 34.5 ppb (32) 1.0 ppb (1) 4.0 ppb (3) 0.64 ppb (7) 82.0 μg/m3 (64) 19.0 μg/m3 (65) 94.0
 
March 18, 2019, 2 p.m. 102.8 ppb (100) 69.5 ppb (66) 97.0 ppb (96) 33.0 ppb (31) 34.1 ppb (32) 1.0 ppb (1) 1.0 ppb (1) 0.7 ppb (8) 74.0 μg/m3 (60) 16.0 μg/m3 (59) 100.0
 
March 18, 2019, 1 p.m. 99.5 ppb (98) 67.8 ppb (65) 98.5 ppb (97) 32.0 ppb (30) 30.8 ppb (29) 1.0 ppb (1) 0.0 ppb (0) 0.62 ppb (7) 62.0 μg/m3 (54) 12.0 μg/m3 (50) 98.0
 
March 18, 2019, noon 96.5 ppb (95) 63.0 ppb (60) 91.9 ppb (90) 33.0 ppb (31) 35.0 ppb (32) 1.0 ppb (1) 0.0 ppb (0) 0.63 ppb (7) 59.0 μg/m3 (52) 12.0 μg/m3 (50) 95.0
 
March 18, 2019, 11 a.m. 59.9 ppb (56) 24.6 ppb (23) 63.2 ppb (60) 35.0 ppb (32) 32.6 ppb (30) 1.0 ppb (1) 0.0 ppb (0) 0.47 ppb (5) 34.0 μg/m3 (31) 13.0 μg/m3 (52) 60.0
 
March 18, 2019, 10 a.m. 51.7 ppb (48) 17.8 ppb (16) 48.2 ppb (45) 34.0 ppb (31) 34.1 ppb (32) 1.0 ppb (1) 0.0 ppb (0) 0.42 ppb (5) 43.0 μg/m3 (39) 16.0 μg/m3 (59) 59.0
 
March 18, 2019, 9 a.m. 49.5 ppb (46) 12.0 ppb (11) 41.5 ppb (38) 38.0 ppb (35) 34.2 ppb (32) 1.0 ppb (1) 0.0 ppb (0) 0.48 ppb (5) 37.0 μg/m3 (34) 18.0 μg/m3 (63) 63.0
 
March 18, 2019, 8 a.m. 49.8 ppb (46) 9.4 ppb (9) 46.4 ppb (43) 40.0 ppb (37) 40.7 ppb (38) 1.0 ppb (1) 1.0 ppb (1) 0.53 ppb (6) 43.0 μg/m3 (39) 11.0 μg/m3 (46) 46.0
 
March 18, 2019, 7 a.m. 41.6 ppb (39) 2.2 ppb (2) 41.1 ppb (38) 39.0 ppb (36) 40.2 ppb (37) 1.0 ppb (1) 5.0 ppb (4) 0.53 ppb (6) 48.0 μg/m3 (44) 11.0 μg/m3 (46) 46.0
 
March 18, 2019, 6 a.m. 34.8 ppb (32) 1.1 ppb (1) 34.6 ppb (32) 34.0 ppb (31) 34.5 ppb (32) 1.0 ppb (1) 12.0 ppb (9) 0.47 ppb (5) 58.0 μg/m3 (52) 9.0 μg/m3 (38) 52.0
 
March 18, 2019, 5 a.m. 32.0 ppb (30) 1.0 ppb (1) 28.4 ppb (26) 31.0 ppb (29) 28.2 ppb (26) 1.0 ppb (1) 19.0 ppb (15) 0.52 ppb (6) 51.0 μg/m3 (46) 9.0 μg/m3 (38) 46.0
 
March 18, 2019, 4 a.m. 28.6 ppb (26) 1.0 ppb (1) 24.2 ppb (22) 28.0 ppb (26) 24.0 ppb (22) 1.0 ppb (1) 27.0 ppb (21) 0.45 ppb (5) 33.0 μg/m3 (30) 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 3 a.m. 14.6 ppb (14) 1.1 ppb (1) 12.6 ppb (12) 14.0 ppb (13) 12.6 ppb (12) 1.0 ppb (1) 44.0 ppb (34) 0.26 ppb (3) 28.0 μg/m3 (25) 8.0 μg/m3 (33) 34.0
 
March 18, 2019, 2 a.m. 10.2 ppb (9) 0.4 ppb (0) 9.0 ppb (8) 10.0 ppb (9) 9.0 ppb (8) 1.0 ppb (1) 51.0 ppb (39) 0.24 ppb (3) 40.0 μg/m3 (36) 8.0 μg/m3 (33) 39.0
 
March 18, 2019, 1 a.m. 9.1 ppb (8) 0.5 ppb (0) 8.0 ppb (7) 9.0 ppb (8) 7.8 ppb (7) 1.0 ppb (1) 58.0 ppb (45) 0.22 ppb (2) 37.0 μg/m3 (34) 8.0 μg/m3 (33) 45.0
 
March 18, 2019, midnight 2.8 ppb (3) 0.3 ppb (0) 1.8 ppb (2) 2.0 ppb (2) 1.7 ppb (2) 1.0 ppb (1) 54.0 ppb (42) 0.11 ppb (1) 14.0 μg/m3 (13) 5.0 μg/m3 (21) 42.0
 
March 17, 2019, 11 p.m. 2.6 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 54.0 ppb (42) 0.11 ppb (1) 13.0 μg/m3 (12) 3.0 μg/m3 (12) 42.0
 
March 17, 2019, 10 p.m. 2.7 ppb (3) 0.4 ppb (0) 1.7 ppb (2) 2.0 ppb (2) 1.4 ppb (1) 0.0 ppb (0) 52.0 ppb (40) 0.11 ppb (1) 14.0 μg/m3 (13) 1.0 μg/m3 (4) 40.0
 
March 17, 2019, 9 p.m. 3.1 ppb (3) 0.5 ppb (0) 2.1 ppb (2) 3.0 ppb (3) 1.8 ppb (2) 1.0 ppb (1) 53.0 ppb (41) 0.12 ppb (1) 17.0 μg/m3 (15) -2.0 μg/m3 (0) 41.0
 
March 17, 2019, 8 p.m. 4.0 ppb (4) 0.6 ppb (1) 3.2 ppb (3) 3.0 ppb (3) 2.7 ppb (3) 1.0 ppb (1) 55.0 ppb (42) 0.13 ppb (1) 22.0 μg/m3 (20) 1.0 μg/m3 (4) 42.0
 
March 17, 2019, 7 p.m. 3.8 ppb (4) 0.7 ppb (1) 2.9 ppb (3) 3.0 ppb (3) 2.4 ppb (2) 1.0 ppb (1) 54.0 ppb (42) 0.12 ppb (1) 14.0 μg/m3 (13) 2.0 μg/m3 (8) 42.0
 
March 17, 2019, 6 p.m. 4.9 ppb (5) 1.0 ppb (1) 3.8 ppb (4) 4.0 ppb (4) 3.1 ppb (3) 1.0 ppb (1) 50.0 ppb (38) 0.13 ppb (1) 15.0 μg/m3 (14) 3.0 μg/m3 (12) 38.0
 
March 17, 2019, 5 p.m. 18.4 ppb (17) 5.0 ppb (5) 16.8 ppb (16) 13.0 ppb (12) 12.0 ppb (11) 1.0 ppb (1) 34.0 ppb (26) 0.25 ppb (3) 23.0 μg/m3 (21) 5.0 μg/m3 (21) 26.0
 
March 17, 2019, 4 p.m. 28.7 ppb (27) 10.3 ppb (10) 26.8 ppb (25) 18.0 ppb (17) 16.9 ppb (16) 1.0 ppb (1) 21.0 ppb (16) 0.31 ppb (3) 29.0 μg/m3 (26) 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 3 p.m. 48.7 ppb (45) 23.9 ppb (22) 45.8 ppb (42) 25.0 ppb (23) 23.6 ppb (22) 1.0 ppb (1) 8.0 ppb (6) 0.38 ppb (4) 35.0 μg/m3 (32) 9.0 μg/m3 (38) 45.0
 
March 17, 2019, 2 p.m. 60.0 ppb (56) 32.1 ppb (30) 56.2 ppb (52) 28.0 ppb (26) 28.2 ppb (26) 1.0 ppb (1) 1.0 ppb (1) 0.5 ppb (6) 35.0 μg/m3 (32) 7.0 μg/m3 (29) 56.0
 
March 17, 2019, 1 p.m. 57.8 ppb (54) 28.1 ppb (26) 50.1 ppb (46) 30.0 ppb (28) 27.8 ppb (26) 1.0 ppb (1) 0.0 ppb (0) 0.47 ppb (5) 29.0 μg/m3 (26) 9.0 μg/m3 (38) 54.0
 
March 17, 2019, noon 51.4 ppb (48) 22.9 ppb (21) 46.4 ppb (43) 29.0 ppb (27) 29.2 ppb (27) 1.0 ppb (1) 0.0 ppb (0) 0.46 ppb (5) 31.0 μg/m3 (28) 10.0 μg/m3 (42) 48.0
 
March 17, 2019, 11 a.m. 46.2 ppb (43) 16.7 ppb (15) 41.5 ppb (38) 30.0 ppb (28) 28.2 ppb (26) 1.0 ppb (1) 0.0 ppb (0) 0.48 ppb (5) 28.0 μg/m3 (25) 11.0 μg/m3 (46) 46.0
 
March 17, 2019, 10 a.m. 44.1 ppb (41) 13.1 ppb (12) 42.1 ppb (39) 31.0 ppb (29) 31.1 ppb (29) 1.0 ppb (1) 0.0 ppb (0) 0.4 ppb (4) 31.0 μg/m3 (28) 13.0 μg/m3 (52) 52.0
 
March 17, 2019, 9 a.m. 43.5 ppb (40) 13.7 ppb (13) 39.4 ppb (36) 30.0 ppb (28) 28.2 ppb (26) 1.0 ppb (1) 0.0 ppb (0) 0.65 ppb (7) 49.0 μg/m3 (45) 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 8 a.m. 38.8 ppb (36) 8.1 ppb (8) 35.7 ppb (33) 31.0 ppb (29) 31.7 ppb (29) 1.0 ppb (1) 1.0 ppb (1) 0.7 ppb (8) 35.0 μg/m3 (32) 11.0 μg/m3 (46) 46.0
 
March 17, 2019, 7 a.m. 33.1 ppb (31) 2.4 ppb (2) 31.9 ppb (30) 31.0 ppb (29) 30.8 ppb (29) 1.0 ppb (1) 4.0 ppb (3) 0.5 ppb (6) 36.0 μg/m3 (33) 15.0 μg/m3 (56) 56.0
 
March 17, 2019, 6 a.m. 29.3 ppb (27) 1.5 ppb (1) 26.6 ppb (25) 28.0 ppb (26) 26.2 ppb (24) 1.0 ppb (1) 14.0 ppb (11) 0.38 ppb (4) 29.0 μg/m3 (26) 5.0 μg/m3 (21) 27.0
 
March 17, 2019, 5 a.m. 21.8 ppb (20) 1.0 ppb (1) 20.5 ppb (19) 21.0 ppb (19) 20.3 ppb (19) 1.0 ppb (1) 21.0 ppb (16) 0.35 ppb (4) 38.0 μg/m3 (35) 4.0 μg/m3 (17) 35.0
 
March 17, 2019, 4 a.m. 18.8 ppb (17) 0.6 ppb (1) 16.2 ppb (15) 18.0 ppb (17) 16.0 ppb (15) 1.0 ppb (1) 27.0 ppb (21) 0.27 ppb (3) 34.0 μg/m3 (31) 3.0 μg/m3 (12) 31.0
 
March 17, 2019, 3 a.m. 11.0 ppb (10) 0.4 ppb (0) 9.6 ppb (9) 11.0 ppb (10) 9.5 ppb (9) 0.0 ppb (0) 40.0 ppb (31) 0.17 ppb (2) 16.0 μg/m3 (15) 2.0 μg/m3 (8) 31.0
 
March 17, 2019, 2 a.m. 6.7 ppb (6) 0.4 ppb (0) 6.0 ppb (6) 6.0 ppb (6) 5.7 ppb (5) 1.0 ppb (1) 46.0 ppb (35) 0.16 ppb (2) 30.0 μg/m3 (27) 3.0 μg/m3 (12) 35.0
 
March 17, 2019, 1 a.m. 5.9 ppb (5) 0.5 ppb (0) 5.1 ppb (5) 5.0 ppb (5) 4.8 ppb (4) 0.0 ppb (0) 48.0 ppb (37) 0.15 ppb (2) 25.0 μg/m3 (23) 3.0 μg/m3 (12) 37.0
 
March 17, 2019, midnight 4.7 ppb (4) 0.6 ppb (1) 3.5 ppb (3) 4.0 ppb (4) 3.0 ppb (3) 1.0 ppb (1) 51.0 ppb (39) 0.13 ppb (1) 20.0 μg/m3 (18) 1.0 μg/m3 (4) 39.0
 
March 16, 2019, 11 p.m. 4.3 ppb (4) 0.7 ppb (1) 3.1 ppb (3) 4.0 ppb (4) 2.5 ppb (2) 1.0 ppb (1) 52.0 ppb (40) 0.13 ppb (1) 20.0 μg/m3 (18) 1.0 μg/m3 (4) 40.0
 
March 16, 2019, 10 p.m. 3.6 ppb (3) 0.7 ppb (1) 2.6 ppb (2) 3.0 ppb (3) 2.0 ppb (2) 0.0 ppb (0) 52.0 ppb (40) 0.12 ppb (1) 10.0 μg/m3 (9) -1.0 μg/m3 (0) 40.0
 
March 16, 2019, 9 p.m. 3.6 ppb (3) 0.7 ppb (1) 2.6 ppb (2) 3.0 ppb (3) 2.0 ppb (2) 0.0 ppb (0) 52.0 ppb (40) 0.12 ppb (1) 12.0 μg/m3 (11) N/A 40.0
 
March 16, 2019, 8 p.m. 3.8 ppb (4) 0.8 ppb (1) 2.9 ppb (3) 3.0 ppb (3) 2.1 ppb (2) 0.0 ppb (0) 50.0 ppb (38) 0.12 ppb (1) 17.0 μg/m3 (15) -2.0 μg/m3 (0) 38.0
 
March 16, 2019, 7 p.m. 4.4 ppb (4) 1.0 ppb (1) 3.3 ppb (3) 3.0 ppb (3) 2.4 ppb (2) 0.0 ppb (0) 48.0 ppb (37) 0.12 ppb (1) 23.0 μg/m3 (21) 0.0 μg/m3 (0) 37.0
 
March 16, 2019, 6 p.m. 4.8 ppb (4) 1.1 ppb (1) 3.6 ppb (3) 4.0 ppb (4) 2.6 ppb (2) 0.0 ppb (0) 47.0 ppb (36) 0.12 ppb (1) 27.0 μg/m3 (25) 2.0 μg/m3 (8) 36.0
 
March 16, 2019, 5 p.m. 6.3 ppb (6) 1.4 ppb (1) 5.1 ppb (5) 5.0 ppb (5) 3.8 ppb (4) 1.0 ppb (1) 46.0 ppb (35) 0.13 ppb (1) 15.0 μg/m3 (14) 4.0 μg/m3 (17) 35.0
 
March 16, 2019, 4 p.m. 12.6 ppb (12) 3.0 ppb (3) 11.3 ppb (10) 10.0 ppb (9) 8.3 ppb (8) 0.0 ppb (0) 39.0 ppb (30) 0.16 ppb (2) 15.0 μg/m3 (14) 2.0 μg/m3 (8) 30.0
 
March 16, 2019, 3 p.m. 5.9 ppb (5) 1.0 ppb (1) 4.5 ppb (4) 5.0 ppb (5) 3.6 ppb (3) 0.0 ppb (0) 43.0 ppb (33) 0.13 ppb (1) 13.0 μg/m3 (12) -1.0 μg/m3 (0) 33.0
 
March 16, 2019, 2 p.m. 7.1 ppb (7) 0.8 ppb (1) 5.6 ppb (5) 6.0 ppb (6) 5.1 ppb (5) 0.0 ppb (0) 42.0 ppb (32) 0.13 ppb (1) 10.0 μg/m3 (9) -1.0 μg/m3 (0) 32.0