AQSQID: 060712002

Site Name: Fontana - Arrow Highway

Location: Fontana, CA

Reporting: True, Located: True

Current AQI: 50.0

Fontana CA, US: 34.0994, -117.5047

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 25, 2019, 11 p.m. 15.7 ppb (15) 2.3 ppb (2) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 65.0 ppb (50) 0.27 ppb (3) N/A N/A 50.0
 
March 25, 2019, 10 p.m. 9.8 ppb (9) 0.9 ppb (1) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 68.0 ppb (52) 0.23 ppb (3) N/A N/A 52.0
 
March 25, 2019, 9 p.m. 9.8 ppb (9) 1.1 ppb (1) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 67.0 ppb (52) 0.23 ppb (3) N/A N/A 52.0
 
March 25, 2019, 8 p.m. 9.9 ppb (9) 1.2 ppb (1) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 61.0 ppb (47) 0.19 ppb (2) N/A N/A 47.0
 
March 25, 2019, 7 p.m. 12.9 ppb (12) 2.5 ppb (2) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 54.0 ppb (42) 0.19 ppb (2) N/A N/A 42.0
 
March 25, 2019, 6 p.m. 29.2 ppb (27) 8.2 ppb (8) N/A 21.0 ppb (19) N/A 0.0 ppb (0) 41.0 ppb (32) 0.26 ppb (3) N/A N/A 32.0
 
March 25, 2019, 5 p.m. 40.4 ppb (37) 14.3 ppb (13) N/A 26.0 ppb (24) N/A 0.0 ppb (0) 28.0 ppb (22) 0.34 ppb (4) N/A N/A 37.0
 
March 25, 2019, 4 p.m. 36.5 ppb (34) 12.9 ppb (12) N/A 24.0 ppb (22) N/A 0.0 ppb (0) 25.0 ppb (19) 0.41 ppb (5) N/A N/A 34.0
 
March 25, 2019, 3 p.m. 40.9 ppb (38) 16.2 ppb (15) N/A 25.0 ppb (23) N/A 0.0 ppb (0) 16.0 ppb (12) 0.5 ppb (6) N/A N/A 38.0
 
March 25, 2019, 2 p.m. 85.6 ppb (84) 57.4 ppb (54) N/A 28.0 ppb (26) N/A 1.0 ppb (1) 4.0 ppb (3) 0.93 ppb (10) N/A N/A 84.0
 
March 25, 2019, 1 p.m. 75.3 ppb (73) 47.8 ppb (44) N/A 27.0 ppb (25) N/A 1.0 ppb (1) 3.0 ppb (2) 0.75 ppb (8) N/A N/A 73.0
 
March 25, 2019, noon 56.2 ppb (52) 29.1 ppb (27) N/A 27.0 ppb (25) N/A 0.0 ppb (0) 3.0 ppb (2) 0.61 ppb (7) N/A N/A 52.0
 
March 25, 2019, 11 a.m. 36.4 ppb (34) 12.3 ppb (11) N/A 24.0 ppb (22) N/A 0.0 ppb (0) 3.0 ppb (2) 0.58 ppb (6) N/A N/A 34.0
 
March 25, 2019, 10 a.m. 34.7 ppb (32) 10.6 ppb (10) N/A 24.0 ppb (22) N/A 0.0 ppb (0) 3.0 ppb (2) 0.5 ppb (6) N/A N/A 32.0
 
March 25, 2019, 9 a.m. 34.9 ppb (32) 8.6 ppb (8) N/A 26.0 ppb (24) N/A 0.0 ppb (0) 3.0 ppb (2) 0.46 ppb (5) N/A N/A 32.0
 
March 25, 2019, 8 a.m. 30.0 ppb (28) 4.9 ppb (5) N/A 25.0 ppb (23) N/A 0.0 ppb (0) 4.0 ppb (3) 0.52 ppb (6) N/A N/A 28.0
 
March 25, 2019, 7 a.m. 31.8 ppb (29) 3.0 ppb (3) N/A 29.0 ppb (27) N/A 0.0 ppb (0) 7.0 ppb (5) 0.39 ppb (4) N/A N/A 29.0
 
March 25, 2019, 6 a.m. 27.7 ppb (26) 1.5 ppb (1) N/A 26.0 ppb (24) N/A 0.0 ppb (0) 16.0 ppb (12) 0.36 ppb (4) N/A N/A 26.0
 
March 25, 2019, 5 a.m. 17.0 ppb (16) 0.5 ppb (0) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 30.0 ppb (23) 0.31 ppb (3) N/A N/A 23.0
 
March 25, 2019, 4 a.m. 13.6 ppb (13) 0.4 ppb (0) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 37.0 ppb (28) 0.29 ppb (3) N/A N/A 28.0
 
March 25, 2019, 3 a.m. 13.2 ppb (12) 0.4 ppb (0) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 42.0 ppb (32) 0.23 ppb (3) N/A N/A 32.0
 
March 25, 2019, 2 a.m. 10.3 ppb (10) 0.3 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 51.0 ppb (39) 0.24 ppb (3) N/A N/A 39.0
 
March 25, 2019, 1 a.m. 5.2 ppb (5) -0.3 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 64.0 ppb (49) 0.19 ppb (2) N/A N/A 49.0
 
March 25, 2019, midnight 4.1 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 65.0 ppb (50) 0.17 ppb (2) N/A N/A 50.0
 
March 24, 2019, 11 p.m. 4.3 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 63.0 ppb (48) 0.16 ppb (2) N/A N/A 48.0
 
March 24, 2019, 10 p.m. 3.5 ppb (3) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 60.0 ppb (46) 0.14 ppb (2) N/A N/A 46.0
 
March 24, 2019, 9 p.m. 4.0 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 58.0 ppb (45) 0.15 ppb (2) N/A N/A 45.0
 
March 24, 2019, 8 p.m. 5.5 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 53.0 ppb (41) 0.17 ppb (2) N/A N/A 41.0
 
March 24, 2019, 7 p.m. 7.4 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 47.0 ppb (36) 0.16 ppb (2) N/A N/A 36.0
 
March 24, 2019, 6 p.m. 9.1 ppb (8) 2.1 ppb (2) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 41.0 ppb (32) 0.17 ppb (2) N/A N/A 32.0
 
March 24, 2019, 5 p.m. 8.5 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (28) 0.17 ppb (2) N/A N/A 28.0
 
March 24, 2019, 4 p.m. 7.3 ppb (7) 1.6 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (25) 0.21 ppb (2) N/A N/A 25.0
 
March 24, 2019, 3 p.m. 11.9 ppb (11) 3.0 ppb (3) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 23.0 ppb (18) 0.23 ppb (3) N/A N/A 18.0
 
March 24, 2019, 2 p.m. 16.7 ppb (15) 4.3 ppb (4) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 11.0 ppb (8) 0.28 ppb (3) N/A N/A 15.0
 
March 24, 2019, 1 p.m. 11.9 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 10.0 ppb (8) 0.23 ppb (3) N/A N/A 11.0
 
March 24, 2019, noon 10.5 ppb (10) 0.7 ppb (1) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 12.0 ppb (9) 0.21 ppb (2) N/A N/A 10.0
 
March 24, 2019, 11 a.m. 6.2 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 26.0 ppb (20) 0.12 ppb (1) N/A N/A 20.0
 
March 24, 2019, 10 a.m. 5.7 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 27.0 ppb (21) 0.11 ppb (1) N/A N/A 21.0
 
March 24, 2019, 9 a.m. 4.3 ppb (4) -0.4 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 32.0 ppb (25) 0.1 ppb (1) N/A N/A 25.0
 
March 24, 2019, 8 a.m. 7.3 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 27.0 ppb (21) 0.12 ppb (1) N/A N/A 21.0
 
March 24, 2019, 7 a.m. 7.3 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (23) 0.13 ppb (1) N/A N/A 23.0
 
March 24, 2019, 6 a.m. 5.9 ppb (5) -0.2 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 31.0 ppb (24) 0.14 ppb (2) N/A N/A 24.0
 
March 24, 2019, 5 a.m. 7.4 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (23) 0.14 ppb (2) N/A N/A 23.0
 
March 24, 2019, 4 a.m. 9.3 ppb (9) 0.0 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 27.0 ppb (21) 0.16 ppb (2) N/A N/A 21.0
 
March 24, 2019, 3 a.m. 8.5 ppb (8) 0.0 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 33.0 ppb (25) 0.15 ppb (2) N/A N/A 25.0
 
March 24, 2019, 2 a.m. 6.5 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 42.0 ppb (32) 0.16 ppb (2) N/A N/A 32.0
 
March 24, 2019, 1 a.m. 5.6 ppb (5) -0.2 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 49.0 ppb (38) 0.14 ppb (2) N/A N/A 38.0
 
March 24, 2019, midnight 5.6 ppb (5) -0.2 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 51.0 ppb (39) 0.17 ppb (2) N/A N/A 39.0
 
March 23, 2019, 11 p.m. 5.8 ppb (5) -0.2 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 55.0 ppb (42) 0.18 ppb (2) N/A N/A 42.0
 
March 23, 2019, 10 p.m. 4.8 ppb (4) 0.2 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 57.0 ppb (44) 0.15 ppb (2) N/A N/A 44.0
 
March 23, 2019, 9 p.m. 4.8 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 53.0 ppb (41) 0.14 ppb (2) N/A N/A 41.0
 
March 23, 2019, 8 p.m. 5.7 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 48.0 ppb (37) 0.16 ppb (2) N/A N/A 37.0
 
March 23, 2019, 7 p.m. 8.1 ppb (8) 1.4 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 45.0 ppb (35) 0.17 ppb (2) N/A N/A 35.0
 
March 23, 2019, 6 p.m. 10.5 ppb (10) 1.7 ppb (2) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 39.0 ppb (30) 0.19 ppb (2) N/A N/A 30.0
 
March 23, 2019, 5 p.m. 13.0 ppb (12) 2.2 ppb (2) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 33.0 ppb (25) 0.22 ppb (2) N/A N/A 25.0
 
March 23, 2019, 4 p.m. 21.9 ppb (20) 4.7 ppb (4) N/A 17.0 ppb (16) N/A 1.0 ppb (1) 25.0 ppb (19) 0.36 ppb (4) N/A N/A 20.0
 
March 23, 2019, 3 p.m. 38.2 ppb (35) 14.2 ppb (13) N/A 24.0 ppb (22) N/A 1.0 ppb (1) 15.0 ppb (12) 0.56 ppb (6) N/A N/A 35.0
 
March 23, 2019, 2 p.m. 51.3 ppb (48) 23.2 ppb (21) N/A 28.0 ppb (26) N/A 1.0 ppb (1) 5.0 ppb (4) 0.5 ppb (6) N/A N/A 48.0
 
March 23, 2019, 1 p.m. 38.2 ppb (35) 11.5 ppb (11) N/A 27.0 ppb (25) N/A 0.0 ppb (0) 5.0 ppb (4) 0.35 ppb (4) N/A N/A 35.0
 
March 23, 2019, noon 42.2 ppb (39) 16.9 ppb (16) N/A 25.0 ppb (23) N/A 0.0 ppb (0) 3.0 ppb (2) 0.42 ppb (5) N/A N/A 39.0
 
March 23, 2019, 11 a.m. 32.2 ppb (30) 12.7 ppb (12) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 3.0 ppb (2) 0.43 ppb (5) N/A N/A 30.0
 
March 23, 2019, 10 a.m. 34.2 ppb (32) 12.5 ppb (12) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 3.0 ppb (2) 0.46 ppb (5) N/A N/A 32.0
 
March 23, 2019, 9 a.m. 24.1 ppb (22) 2.5 ppb (2) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 8.0 ppb (6) 0.34 ppb (4) N/A N/A 22.0
 
March 23, 2019, 8 a.m. 34.0 ppb (31) 3.7 ppb (3) N/A 30.0 ppb (28) N/A 0.0 ppb (0) 7.0 ppb (5) 0.35 ppb (4) N/A N/A 31.0
 
March 23, 2019, 7 a.m. 25.7 ppb (24) 2.2 ppb (2) N/A 23.0 ppb (21) N/A 0.0 ppb (0) 11.0 ppb (8) 0.42 ppb (5) N/A N/A 24.0
 
March 23, 2019, 6 a.m. 19.3 ppb (18) 1.2 ppb (1) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 16.0 ppb (12) 0.35 ppb (4) N/A N/A 18.0
 
March 23, 2019, 5 a.m. 19.3 ppb (18) 0.9 ppb (1) N/A 18.0 ppb (17) N/A 1.0 ppb (1) 25.0 ppb (19) 0.29 ppb (3) N/A N/A 19.0
 
March 23, 2019, 4 a.m. 13.4 ppb (12) 0.4 ppb (0) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 33.0 ppb (25) 0.28 ppb (3) N/A N/A 25.0
 
March 23, 2019, 3 a.m. 13.2 ppb (12) 0.2 ppb (0) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 38.0 ppb (29) 0.21 ppb (2) N/A N/A 29.0
 
March 23, 2019, 2 a.m. 12.4 ppb (11) -0.1 ppb (0) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 41.0 ppb (32) 0.18 ppb (2) N/A N/A 32.0
 
March 23, 2019, 1 a.m. 13.0 ppb (12) 0.3 ppb (0) N/A 13.0 ppb (12) N/A 1.0 ppb (1) 45.0 ppb (35) 0.2 ppb (2) N/A N/A 35.0
 
March 23, 2019, midnight 11.3 ppb (10) 0.8 ppb (1) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 50.0 ppb (38) 0.21 ppb (2) N/A N/A 38.0
 
March 22, 2019, 11 p.m. 9.3 ppb (9) 1.1 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 51.0 ppb (39) 0.18 ppb (2) N/A N/A 39.0
 
March 22, 2019, 10 p.m. 9.1 ppb (8) 1.3 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 51.0 ppb (39) 0.17 ppb (2) N/A N/A 39.0
 
March 22, 2019, 9 p.m. 9.4 ppb (9) 1.5 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 48.0 ppb (37) 0.19 ppb (2) N/A N/A 37.0
 
March 22, 2019, 8 p.m. 11.6 ppb (11) 2.5 ppb (2) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 48.0 ppb (37) 0.17 ppb (2) N/A N/A 37.0
 
March 22, 2019, 7 p.m. 13.1 ppb (12) 2.9 ppb (3) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 45.0 ppb (35) 0.15 ppb (2) N/A N/A 35.0
 
March 22, 2019, 6 p.m. 17.4 ppb (16) 4.8 ppb (4) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 40.0 ppb (31) 0.18 ppb (2) N/A N/A 31.0
 
March 22, 2019, 5 p.m. 17.8 ppb (16) 5.0 ppb (5) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 38.0 ppb (29) 0.16 ppb (2) N/A N/A 29.0
 
March 22, 2019, 4 p.m. 15.0 ppb (14) 3.6 ppb (3) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 37.0 ppb (28) 0.17 ppb (2) N/A N/A 28.0
 
March 22, 2019, 3 p.m. 29.4 ppb (27) 9.1 ppb (8) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 22.0 ppb (17) 0.25 ppb (3) N/A N/A 27.0
 
March 22, 2019, 2 p.m. 35.0 ppb (32) 9.7 ppb (9) N/A 25.0 ppb (23) N/A 0.0 ppb (0) 10.0 ppb (8) 0.31 ppb (3) N/A N/A 32.0
 
March 22, 2019, 1 p.m. 38.6 ppb (36) 8.6 ppb (8) N/A 30.0 ppb (28) N/A 0.0 ppb (0) 6.0 ppb (5) 0.3 ppb (3) N/A N/A 36.0
 
March 22, 2019, noon 23.4 ppb (22) 2.2 ppb (2) N/A 21.0 ppb (19) N/A 0.0 ppb (0) 15.0 ppb (12) 0.22 ppb (2) N/A N/A 22.0
 
March 22, 2019, 11 a.m. 17.6 ppb (16) 0.8 ppb (1) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 25.0 ppb (19) 0.15 ppb (2) N/A N/A 19.0
 
March 22, 2019, 10 a.m. 10.6 ppb (10) 0.1 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 32.0 ppb (25) 0.16 ppb (2) N/A N/A 25.0
 
March 22, 2019, 9 a.m. 8.3 ppb (8) 0.1 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 35.0 ppb (27) 0.15 ppb (2) N/A N/A 27.0
 
March 22, 2019, 8 a.m. 8.8 ppb (8) -0.1 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 34.0 ppb (26) 0.16 ppb (2) N/A N/A 26.0
 
March 22, 2019, 7 a.m. 13.3 ppb (12) 0.2 ppb (0) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 28.0 ppb (22) 0.17 ppb (2) N/A N/A 22.0
 
March 22, 2019, 6 a.m. 15.5 ppb (14) 0.6 ppb (1) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 25.0 ppb (19) 0.19 ppb (2) N/A N/A 19.0
 
March 22, 2019, 5 a.m. 12.3 ppb (11) 0.3 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 29.0 ppb (22) 0.17 ppb (2) N/A N/A 22.0
 
March 22, 2019, 4 a.m. 10.5 ppb (10) 0.2 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 31.0 ppb (24) 0.18 ppb (2) N/A N/A 24.0
 
March 22, 2019, 3 a.m. 9.5 ppb (9) 0.1 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 36.0 ppb (28) 0.15 ppb (2) N/A N/A 28.0
 
March 22, 2019, 2 a.m. 9.1 ppb (8) 0.1 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 39.0 ppb (30) 0.15 ppb (2) N/A N/A 30.0
 
March 22, 2019, 1 a.m. 7.9 ppb (7) 0.3 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 44.0 ppb (34) 0.15 ppb (2) N/A N/A 34.0
 
March 22, 2019, midnight 7.4 ppb (7) 0.8 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 47.0 ppb (36) 0.15 ppb (2) N/A N/A 36.0
 
March 21, 2019, 11 p.m. 7.7 ppb (7) 0.9 ppb (1) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 48.0 ppb (37) 0.14 ppb (2) N/A N/A 37.0
 
March 21, 2019, 10 p.m. 9.9 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 46.0 ppb (35) 0.15 ppb (2) N/A N/A 35.0
 
March 21, 2019, 9 p.m. 10.8 ppb (10) 2.8 ppb (3) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 44.0 ppb (34) 0.15 ppb (2) N/A N/A 34.0
 
March 21, 2019, 8 p.m. 7.9 ppb (7) 1.7 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 46.0 ppb (35) 0.13 ppb (1) N/A N/A 35.0
 
March 21, 2019, 7 p.m. 11.6 ppb (11) 2.0 ppb (2) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 40.0 ppb (31) 0.15 ppb (2) N/A N/A 31.0
 
March 21, 2019, 6 p.m. 12.3 ppb (11) 1.5 ppb (1) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 38.0 ppb (29) 0.15 ppb (2) N/A N/A 29.0
 
March 21, 2019, 5 p.m. 11.2 ppb (10) 2.2 ppb (2) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 41.0 ppb (32) 0.12 ppb (1) N/A N/A 32.0
 
March 21, 2019, 4 p.m. 14.4 ppb (13) 2.6 ppb (2) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 37.0 ppb (28) 0.14 ppb (2) N/A N/A 28.0
 
March 21, 2019, 3 p.m. 19.4 ppb (18) 3.1 ppb (3) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 31.0 ppb (24) 0.2 ppb (2) N/A N/A 24.0
 
March 21, 2019, 2 p.m. 22.1 ppb (20) 2.6 ppb (2) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 25.0 ppb (19) 0.19 ppb (2) N/A N/A 20.0
 
March 21, 2019, 1 p.m. 14.3 ppb (13) 0.8 ppb (1) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 29.0 ppb (22) 0.17 ppb (2) N/A N/A 22.0
 
March 21, 2019, noon 16.5 ppb (15) 0.9 ppb (1) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 26.0 ppb (20) 0.17 ppb (2) N/A N/A 20.0
 
March 21, 2019, 11 a.m. 10.8 ppb (10) 0.3 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 32.0 ppb (25) 0.13 ppb (1) N/A N/A 25.0
 
March 21, 2019, 10 a.m. 11.1 ppb (10) 0.5 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 32.0 ppb (25) 0.15 ppb (2) N/A N/A 25.0
 
March 21, 2019, 9 a.m. 7.4 ppb (7) -0.1 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 35.0 ppb (27) 0.14 ppb (2) N/A N/A 27.0
 
March 21, 2019, 8 a.m. 8.2 ppb (8) 0.0 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 35.0 ppb (27) 0.15 ppb (2) N/A N/A 27.0
 
March 21, 2019, 7 a.m. 11.2 ppb (10) 0.4 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 30.0 ppb (23) 0.18 ppb (2) N/A N/A 23.0
 
March 21, 2019, 6 a.m. 15.5 ppb (14) 0.5 ppb (0) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 25.0 ppb (19) 0.19 ppb (2) N/A N/A 19.0
 
March 21, 2019, 5 a.m. 19.0 ppb (18) 1.3 ppb (1) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 24.0 ppb (18) 0.22 ppb (2) N/A N/A 18.0
 
March 21, 2019, 4 a.m. 11.1 ppb (10) 0.1 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 32.0 ppb (25) 0.18 ppb (2) N/A N/A 25.0
 
March 21, 2019, 3 a.m. 11.0 ppb (10) 0.4 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 36.0 ppb (28) 0.17 ppb (2) N/A N/A 28.0
 
March 21, 2019, 2 a.m. 17.9 ppb (17) 2.8 ppb (3) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 32.0 ppb (25) 0.19 ppb (2) N/A N/A 25.0
 
March 21, 2019, 1 a.m. 15.1 ppb (14) 1.2 ppb (1) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 37.0 ppb (28) 0.15 ppb (2) N/A N/A 28.0
 
March 21, 2019, midnight 12.3 ppb (11) 0.7 ppb (1) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 41.0 ppb (32) 0.15 ppb (2) N/A N/A 32.0
 
March 20, 2019, 11 p.m. 8.8 ppb (8) 0.2 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 46.0 ppb (35) 0.16 ppb (2) N/A N/A 35.0
 
March 20, 2019, 10 p.m. 3.5 ppb (3) -0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 51.0 ppb (39) 0.1 ppb (1) N/A N/A 39.0
 
March 20, 2019, 9 p.m. 4.9 ppb (5) 0.1 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 50.0 ppb (38) 0.11 ppb (1) N/A N/A 38.0
 
March 20, 2019, 8 p.m. 7.1 ppb (7) 0.8 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 48.0 ppb (37) 0.13 ppb (1) N/A N/A 37.0
 
March 20, 2019, 7 p.m. 12.4 ppb (11) 2.0 ppb (2) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 44.0 ppb (34) 0.13 ppb (1) N/A N/A 34.0
 
March 20, 2019, 6 p.m. 13.5 ppb (12) 3.2 ppb (3) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 44.0 ppb (34) 0.14 ppb (2) N/A N/A 34.0
 
March 20, 2019, 5 p.m. 16.5 ppb (15) 3.6 ppb (3) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 36.0 ppb (28) 0.14 ppb (2) N/A N/A 28.0
 
March 20, 2019, 4 p.m. 13.1 ppb (12) 2.0 ppb (2) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 37.0 ppb (28) 0.14 ppb (2) N/A N/A 28.0
 
March 20, 2019, 3 p.m. 23.3 ppb (22) 3.7 ppb (3) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 25.0 ppb (19) 0.22 ppb (2) N/A N/A 22.0
 
March 20, 2019, 2 p.m. 32.9 ppb (30) 5.7 ppb (5) N/A 27.0 ppb (25) N/A 0.0 ppb (0) 14.0 ppb (11) 0.26 ppb (3) N/A N/A 30.0
 
March 20, 2019, 1 p.m. 18.6 ppb (17) 1.1 ppb (1) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 22.0 ppb (17) 0.21 ppb (2) N/A N/A 17.0
 
March 20, 2019, noon 12.2 ppb (11) 0.5 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 27.0 ppb (21) 0.16 ppb (2) N/A N/A 21.0
 
March 20, 2019, 11 a.m. 11.1 ppb (10) 0.4 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 31.0 ppb (24) 0.12 ppb (1) N/A N/A 24.0
 
March 20, 2019, 10 a.m. 10.0 ppb (9) -0.1 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 35.0 ppb (27) 0.13 ppb (1) N/A N/A 27.0
 
March 20, 2019, 9 a.m. 5.9 ppb (5) 0.1 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 41.0 ppb (32) 0.1 ppb (1) N/A N/A 32.0
 
March 20, 2019, 8 a.m. 4.2 ppb (4) -0.4 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 45.0 ppb (35) 0.1 ppb (1) N/A N/A 35.0
 
March 20, 2019, 7 a.m. 3.5 ppb (3) -0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 47.0 ppb (36) 0.09 ppb (1) N/A N/A 36.0
 
March 20, 2019, 6 a.m. 7.2 ppb (7) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 41.0 ppb (32) 0.14 ppb (2) N/A N/A 32.0
 
March 20, 2019, 5 a.m. 9.1 ppb (8) 0.4 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 39.0 ppb (30) 0.15 ppb (2) N/A N/A 30.0
 
March 20, 2019, 4 a.m. 12.3 ppb (11) 0.4 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 35.0 ppb (27) 0.18 ppb (2) N/A N/A 27.0
 
March 20, 2019, 3 a.m. 16.0 ppb (15) 0.7 ppb (1) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 33.0 ppb (25) 0.19 ppb (2) N/A N/A 25.0
 
March 20, 2019, 2 a.m. 10.9 ppb (10) 0.1 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 40.0 ppb (31) 0.18 ppb (2) N/A N/A 31.0
 
March 20, 2019, 1 a.m. 12.1 ppb (11) 0.5 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 46.0 ppb (35) 0.17 ppb (2) N/A N/A 35.0
 
March 20, 2019, midnight 8.8 ppb (8) 0.4 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 58.0 ppb (45) 0.16 ppb (2) N/A N/A 45.0
 
March 19, 2019, 11 p.m. 8.7 ppb (8) 0.5 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 61.0 ppb (47) 0.18 ppb (2) N/A N/A 47.0
 
March 19, 2019, 10 p.m. 8.8 ppb (8) 0.8 ppb (1) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 65.0 ppb (50) 0.19 ppb (2) N/A N/A 50.0
 
March 19, 2019, 9 p.m. 12.0 ppb (11) 1.3 ppb (1) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 64.0 ppb (49) 0.22 ppb (2) N/A N/A 49.0
 
March 19, 2019, 8 p.m. 17.1 ppb (16) 2.8 ppb (3) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 57.0 ppb (44) 0.24 ppb (3) N/A N/A 44.0
 
March 19, 2019, 7 p.m. 30.1 ppb (28) 6.9 ppb (6) N/A 23.0 ppb (21) N/A 1.0 ppb (1) 48.0 ppb (37) 0.28 ppb (3) N/A N/A 37.0
 
March 19, 2019, 6 p.m. 51.5 ppb (48) 16.2 ppb (15) N/A 35.0 ppb (32) N/A 1.0 ppb (1) 33.0 ppb (25) 0.4 ppb (4) N/A N/A 48.0
 
March 19, 2019, 5 p.m. 53.0 ppb (49) 17.9 ppb (17) N/A 35.0 ppb (32) N/A 1.0 ppb (1) 28.0 ppb (22) 0.38 ppb (4) N/A N/A 49.0
 
March 19, 2019, 4 p.m. 48.8 ppb (45) 16.7 ppb (15) N/A 32.0 ppb (30) N/A 1.0 ppb (1) 22.0 ppb (17) 0.42 ppb (5) N/A N/A 45.0
 
March 19, 2019, 3 p.m. 86.1 ppb (84) 50.2 ppb (46) N/A 36.0 ppb (33) N/A 1.0 ppb (1) 9.0 ppb (7) 0.7 ppb (8) N/A N/A 84.0
 
March 19, 2019, 2 p.m. 103.9 ppb (101) 71.0 ppb (68) N/A 33.0 ppb (31) N/A 1.0 ppb (1) 4.0 ppb (3) 0.89 ppb (10) N/A N/A 101.0
 
March 19, 2019, 1 p.m. 54.2 ppb (50) 22.9 ppb (21) N/A 31.0 ppb (29) N/A 0.0 ppb (0) 3.0 ppb (2) 0.63 ppb (7) N/A N/A 50.0
 
March 19, 2019, noon 53.8 ppb (50) 19.0 ppb (18) N/A 35.0 ppb (32) N/A 0.0 ppb (0) 3.0 ppb (2) 0.49 ppb (5) N/A N/A 50.0
 
March 19, 2019, 11 a.m. 44.5 ppb (41) 13.9 ppb (13) N/A 31.0 ppb (29) N/A 0.0 ppb (0) 3.0 ppb (2) 0.4 ppb (4) N/A N/A 41.0
 
March 19, 2019, 10 a.m. 37.6 ppb (35) 5.8 ppb (5) N/A 32.0 ppb (30) N/A 0.0 ppb (0) 4.0 ppb (3) 0.35 ppb (4) N/A N/A 35.0
 
March 19, 2019, 9 a.m. 43.3 ppb (40) 11.0 ppb (10) N/A 32.0 ppb (30) N/A 0.0 ppb (0) 3.0 ppb (2) 0.53 ppb (6) N/A N/A 40.0
 
March 19, 2019, 8 a.m. 36.5 ppb (34) 5.1 ppb (5) N/A 31.0 ppb (29) N/A 0.0 ppb (0) 4.0 ppb (3) 0.53 ppb (6) N/A N/A 34.0
 
March 19, 2019, 7 a.m. 39.0 ppb (36) 3.9 ppb (4) N/A 35.0 ppb (32) N/A 0.0 ppb (0) 8.0 ppb (6) 0.46 ppb (5) N/A N/A 36.0
 
March 19, 2019, 6 a.m. 39.2 ppb (36) 4.2 ppb (4) N/A 35.0 ppb (32) N/A 0.0 ppb (0) 8.0 ppb (6) 0.5 ppb (6) N/A N/A 36.0
 
March 19, 2019, 5 a.m. 29.5 ppb (27) 1.6 ppb (1) N/A 28.0 ppb (26) N/A 0.0 ppb (0) 22.0 ppb (17) 0.34 ppb (4) N/A N/A 27.0
 
March 19, 2019, 4 a.m. 24.2 ppb (22) 0.9 ppb (1) N/A 23.0 ppb (21) N/A 0.0 ppb (0) 35.0 ppb (27) 0.24 ppb (3) N/A N/A 27.0
 
March 19, 2019, 3 a.m. 19.0 ppb (18) 0.3 ppb (0) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 45.0 ppb (35) 0.25 ppb (3) N/A N/A 35.0
 
March 19, 2019, 2 a.m. 16.6 ppb (15) 0.1 ppb (0) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 51.0 ppb (39) 0.19 ppb (2) N/A N/A 39.0
 
March 19, 2019, 1 a.m. 12.3 ppb (11) 0.3 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 59.0 ppb (45) 0.17 ppb (2) N/A N/A 45.0
 
March 19, 2019, midnight 11.5 ppb (11) 0.6 ppb (1) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 61.0 ppb (47) 0.16 ppb (2) N/A N/A 47.0