AQSQID: 060590007

Site Name: Anaheim

Location: Anaheim, CA

Reporting: True, Located: True

Current AQI: 32.0

Anaheim CA, US: 33.82, -117.913101

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 23, 2019, 6 p.m. 7.0 ppb (6) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 38.0 ppb (29) 0.27 ppb (3) 15.0 μg/m3 (14) 7.8 μg/m3 (32) 32.0
 
March 23, 2019, 5 p.m. 8.6 ppb (8) 1.5 ppb (1) N/A 7.0 ppb (6) N/A N/A 34.0 ppb (26) 0.3 ppb (3) 22.0 μg/m3 (20) 6.9 μg/m3 (29) 29.0
 
March 23, 2019, 4 p.m. 16.5 ppb (15) 2.8 ppb (3) N/A 14.0 ppb (13) N/A N/A 23.0 ppb (18) 0.38 ppb (4) 23.0 μg/m3 (21) 4.4 μg/m3 (18) 21.0
 
March 23, 2019, 3 p.m. 27.1 ppb (25) 5.9 ppb (5) N/A 21.0 ppb (19) N/A N/A 9.0 ppb (7) 0.5 ppb (6) 17.0 μg/m3 (15) 5.9 μg/m3 (25) 25.0
 
March 23, 2019, 2 p.m. 26.0 ppb (24) 4.5 ppb (4) N/A 22.0 ppb (20) N/A N/A 5.0 ppb (4) 0.49 ppb (5) 20.0 μg/m3 (18) 9.1 μg/m3 (38) 38.0
 
March 23, 2019, 1 p.m. 36.9 ppb (34) 10.7 ppb (10) N/A 26.0 ppb (24) N/A N/A 0.0 ppb (0) 0.46 ppb (5) 15.0 μg/m3 (14) 7.7 μg/m3 (32) 34.0
 
March 23, 2019, noon 24.4 ppb (23) 4.5 ppb (4) N/A 20.0 ppb (19) N/A N/A 4.0 ppb (3) 0.4 ppb (4) 14.0 μg/m3 (13) 5.5 μg/m3 (23) 23.0
 
March 23, 2019, 11 a.m. 16.3 ppb (15) 1.6 ppb (1) N/A 15.0 ppb (14) N/A N/A 8.0 ppb (6) 0.66 ppb (7) 14.0 μg/m3 (13) 6.0 μg/m3 (25) 25.0
 
March 23, 2019, 10 a.m. 13.8 ppb (13) 0.4 ppb (0) N/A 13.0 ppb (12) N/A N/A 9.0 ppb (7) 0.36 ppb (4) 12.0 μg/m3 (11) 4.9 μg/m3 (20) 20.0
 
March 23, 2019, 9 a.m. 16.1 ppb (15) 0.3 ppb (0) N/A 16.0 ppb (15) N/A N/A 9.0 ppb (7) 0.43 ppb (5) 19.0 μg/m3 (17) 4.7 μg/m3 (20) 20.0
 
March 23, 2019, 8 a.m. 18.6 ppb (17) 0.5 ppb (0) N/A 18.0 ppb (17) N/A N/A 12.0 ppb (9) 0.44 ppb (5) 14.0 μg/m3 (13) 6.9 μg/m3 (29) 29.0
 
March 23, 2019, 7 a.m. 17.1 ppb (16) 0.3 ppb (0) N/A 17.0 ppb (16) N/A N/A 16.0 ppb (12) 0.44 ppb (5) 11.0 μg/m3 (10) 7.7 μg/m3 (32) 32.0
 
March 23, 2019, 6 a.m. 17.0 ppb (16) 0.2 ppb (0) N/A 17.0 ppb (16) N/A N/A 17.0 ppb (13) 0.42 ppb (5) 10.0 μg/m3 (9) 6.2 μg/m3 (26) 26.0
 
March 23, 2019, 5 a.m. 11.8 ppb (11) 0.1 ppb (0) N/A 12.0 ppb (11) N/A N/A 29.0 ppb (22) 0.35 ppb (4) 9.0 μg/m3 (8) 4.5 μg/m3 (19) 22.0
 
March 23, 2019, 4 a.m. 10.5 ppb (10) -0.1 ppb (0) N/A 11.0 ppb (10) N/A N/A 31.0 ppb (24) 0.35 ppb (4) 8.0 μg/m3 (7) 5.9 μg/m3 (25) 25.0
 
March 23, 2019, 3 a.m. 8.6 ppb (8) 0.0 ppb (0) N/A 9.0 ppb (8) N/A N/A 35.0 ppb (27) 0.28 ppb (3) 7.0 μg/m3 (6) 5.1 μg/m3 (21) 27.0
 
March 23, 2019, 2 a.m. 9.4 ppb (9) -0.1 ppb (0) N/A 10.0 ppb (9) N/A N/A 35.0 ppb (27) 0.29 ppb (3) 6.0 μg/m3 (5) 3.9 μg/m3 (16) 27.0
 
March 23, 2019, 1 a.m. 5.0 ppb (5) -0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 42.0 ppb (32) 0.24 ppb (3) 7.0 μg/m3 (6) 4.4 μg/m3 (18) 32.0
 
March 23, 2019, midnight 4.6 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) 0.24 ppb (3) 9.0 μg/m3 (8) 4.9 μg/m3 (20) 35.0
 
March 22, 2019, 11 p.m. 6.0 ppb (6) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 47.0 ppb (36) 0.24 ppb (3) 10.0 μg/m3 (9) 6.4 μg/m3 (27) 36.0
 
March 22, 2019, 10 p.m. 8.2 ppb (8) 1.4 ppb (1) N/A 7.0 ppb (6) N/A N/A 46.0 ppb (35) 0.25 ppb (3) 18.0 μg/m3 (16) 6.4 μg/m3 (27) 35.0
 
March 22, 2019, 9 p.m. 7.1 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A N/A 48.0 ppb (37) 0.26 ppb (3) 15.0 μg/m3 (14) 7.3 μg/m3 (30) 37.0
 
March 22, 2019, 8 p.m. 8.3 ppb (8) 1.2 ppb (1) N/A 7.0 ppb (6) N/A N/A 46.0 ppb (35) 0.31 ppb (3) 19.0 μg/m3 (17) 5.6 μg/m3 (23) 35.0
 
March 22, 2019, 7 p.m. 11.3 ppb (10) 2.3 ppb (2) N/A 9.0 ppb (8) N/A N/A 41.0 ppb (32) 0.3 ppb (3) N/A N/A 32.0
 
March 22, 2019, 6 p.m. 12.1 ppb (11) 3.2 ppb (3) N/A 9.0 ppb (8) N/A N/A 39.0 ppb (30) 0.44 ppb (5) N/A N/A 30.0
 
March 22, 2019, 5 p.m. 7.3 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 41.0 ppb (32) 0.25 ppb (3) N/A N/A 32.0
 
March 22, 2019, 4 p.m. 22.0 ppb (20) 4.7 ppb (4) N/A 17.0 ppb (16) N/A N/A 26.0 ppb (20) 0.41 ppb (5) 18.0 μg/m3 (16) 7.3 μg/m3 (30) 30.0
 
March 22, 2019, 3 p.m. 55.4 ppb (51) 23.5 ppb (22) N/A 32.0 ppb (30) N/A N/A 5.0 ppb (4) 0.73 ppb (8) 20.0 μg/m3 (18) 7.9 μg/m3 (33) 51.0
 
March 22, 2019, 2 p.m. 50.7 ppb (47) 19.2 ppb (18) N/A 32.0 ppb (30) N/A N/A 2.0 ppb (2) 0.69 ppb (8) 19.0 μg/m3 (17) 8.9 μg/m3 (37) 47.0
 
March 22, 2019, 1 p.m. 73.9 ppb (71) 40.3 ppb (37) N/A 34.0 ppb (31) N/A N/A -1.0 ppb (0) 0.78 ppb (9) 13.0 μg/m3 (12) 7.4 μg/m3 (31) 71.0
 
March 22, 2019, noon 88.5 ppb (87) 52.9 ppb (49) N/A 36.0 ppb (33) N/A N/A -1.0 ppb (0) 0.67 ppb (7) 22.0 μg/m3 (20) 6.5 μg/m3 (27) 87.0
 
March 22, 2019, 11 a.m. 33.8 ppb (31) 5.2 ppb (5) N/A 29.0 ppb (27) N/A N/A 1.0 ppb (1) 0.56 ppb (6) 5.0 μg/m3 (5) 7.9 μg/m3 (33) 33.0
 
March 22, 2019, 10 a.m. 22.7 ppb (21) 1.0 ppb (1) N/A 22.0 ppb (20) N/A N/A 7.0 ppb (5) 0.55 ppb (6) 15.0 μg/m3 (14) 7.2 μg/m3 (30) 30.0
 
March 22, 2019, 9 a.m. 24.1 ppb (22) 0.7 ppb (1) N/A 23.0 ppb (21) N/A N/A 7.0 ppb (5) 0.48 ppb (5) 3.0 μg/m3 (3) 7.7 μg/m3 (32) 32.0
 
March 22, 2019, 8 a.m. 31.2 ppb (29) 1.8 ppb (2) N/A 29.0 ppb (27) N/A N/A 2.0 ppb (2) 0.58 ppb (6) 16.0 μg/m3 (15) 8.2 μg/m3 (34) 34.0
 
March 22, 2019, 7 a.m. 22.1 ppb (20) 0.8 ppb (1) N/A 21.0 ppb (19) N/A N/A 14.0 ppb (11) 0.47 ppb (5) 12.0 μg/m3 (11) 6.0 μg/m3 (25) 25.0
 
March 22, 2019, 6 a.m. 20.0 ppb (19) 0.4 ppb (0) N/A 20.0 ppb (19) N/A N/A 16.0 ppb (12) 0.45 ppb (5) 13.0 μg/m3 (12) 5.7 μg/m3 (24) 24.0
 
March 22, 2019, 5 a.m. 21.6 ppb (20) 1.2 ppb (1) N/A 20.0 ppb (19) N/A N/A 17.0 ppb (13) 0.45 ppb (5) 10.0 μg/m3 (9) 6.7 μg/m3 (28) 28.0
 
March 22, 2019, 4 a.m. 13.7 ppb (13) 0.0 ppb (0) N/A 14.0 ppb (13) N/A N/A 28.0 ppb (22) 0.34 ppb (4) 5.0 μg/m3 (5) 3.7 μg/m3 (15) 22.0
 
March 22, 2019, 3 a.m. 9.9 ppb (9) 0.0 ppb (0) N/A 10.0 ppb (9) N/A N/A 34.0 ppb (26) 0.3 ppb (3) 5.0 μg/m3 (5) 0.1 μg/m3 (0) 26.0
 
March 22, 2019, 2 a.m. 6.5 ppb (6) -0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 39.0 ppb (30) 0.27 ppb (3) 2.0 μg/m3 (2) 2.0 μg/m3 (8) 30.0
 
March 22, 2019, 1 a.m. 3.8 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) 0.23 ppb (3) 3.0 μg/m3 (3) 5.9 μg/m3 (25) 32.0
 
March 22, 2019, midnight 3.5 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) 0.23 ppb (3) 5.0 μg/m3 (5) 3.7 μg/m3 (15) 34.0
 
March 21, 2019, 11 p.m. 8.5 ppb (8) 0.6 ppb (1) N/A 8.0 ppb (7) N/A N/A 41.0 ppb (32) 0.28 ppb (3) 6.0 μg/m3 (5) 3.9 μg/m3 (16) 32.0
 
March 21, 2019, 10 p.m. 3.2 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) N/A 8.0 μg/m3 (7) 4.9 μg/m3 (20) 35.0
 
March 21, 2019, 9 p.m. 3.4 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) N/A 8.0 μg/m3 (7) 3.9 μg/m3 (16) 35.0
 
March 21, 2019, 8 p.m. 5.3 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 43.0 ppb (33) N/A 7.0 μg/m3 (6) 4.9 μg/m3 (20) 33.0
 
March 21, 2019, 7 p.m. 8.2 ppb (8) 1.0 ppb (1) N/A 7.0 ppb (6) N/A N/A 40.0 ppb (31) N/A 7.0 μg/m3 (6) 2.9 μg/m3 (12) 31.0
 
March 21, 2019, 6 p.m. 7.1 ppb (7) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 42.0 ppb (32) N/A 10.0 μg/m3 (9) 2.0 μg/m3 (8) 32.0
 
March 21, 2019, 5 p.m. 4.8 ppb (4) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 44.0 ppb (34) N/A 8.0 μg/m3 (7) 3.3 μg/m3 (14) 34.0
 
March 21, 2019, 4 p.m. 8.1 ppb (8) 0.8 ppb (1) N/A 7.0 ppb (6) N/A N/A 41.0 ppb (32) N/A 6.0 μg/m3 (5) 3.2 μg/m3 (13) 32.0
 
March 21, 2019, 3 p.m. 20.8 ppb (19) 1.6 ppb (1) N/A 19.0 ppb (18) N/A N/A 25.0 ppb (19) N/A 16.0 μg/m3 (15) 6.2 μg/m3 (26) 26.0
 
March 21, 2019, 2 p.m. 34.5 ppb (32) 4.8 ppb (4) N/A 30.0 ppb (28) N/A N/A 12.0 ppb (9) N/A 23.0 μg/m3 (21) 7.2 μg/m3 (30) 32.0
 
March 21, 2019, 1 p.m. 22.3 ppb (21) 0.5 ppb (0) N/A 22.0 ppb (20) N/A N/A 17.0 ppb (13) N/A 14.0 μg/m3 (13) 4.3 μg/m3 (18) 21.0
 
March 21, 2019, noon 14.5 ppb (13) 0.1 ppb (0) N/A 14.0 ppb (13) N/A N/A 22.0 ppb (17) N/A 10.0 μg/m3 (9) 4.0 μg/m3 (17) 17.0
 
March 21, 2019, 11 a.m. 8.4 ppb (8) -0.2 ppb (0) N/A 9.0 ppb (8) N/A N/A 30.0 ppb (23) N/A 14.0 μg/m3 (13) 3.8 μg/m3 (16) 23.0
 
March 21, 2019, 10 a.m. 7.2 ppb (7) -0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 31.0 ppb (24) N/A 11.0 μg/m3 (10) 5.0 μg/m3 (21) 24.0
 
March 21, 2019, 9 a.m. 4.4 ppb (4) -0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) N/A 14.0 μg/m3 (13) 6.9 μg/m3 (29) 29.0
 
March 21, 2019, 8 a.m. 3.6 ppb (3) -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) N/A 16.0 μg/m3 (15) 6.4 μg/m3 (27) 31.0
 
March 21, 2019, 7 a.m. 4.8 ppb (4) -0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 41.0 ppb (32) N/A 14.0 μg/m3 (13) 6.1 μg/m3 (25) 32.0
 
March 21, 2019, 6 a.m. 10.2 ppb (9) -0.1 ppb (0) N/A 10.0 ppb (9) N/A N/A 32.0 ppb (25) N/A 7.0 μg/m3 (6) 4.2 μg/m3 (18) 25.0
 
March 21, 2019, 5 a.m. 10.5 ppb (10) -0.1 ppb (0) N/A 11.0 ppb (10) N/A N/A 31.0 ppb (24) N/A 6.0 μg/m3 (5) 4.3 μg/m3 (18) 24.0
 
March 21, 2019, 4 a.m. 8.4 ppb (8) -0.1 ppb (0) N/A 8.0 ppb (7) N/A N/A 37.0 ppb (28) N/A 5.0 μg/m3 (5) 4.3 μg/m3 (18) 28.0
 
March 21, 2019, 3 a.m. 6.5 ppb (6) -0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A 41.0 ppb (32) N/A 3.0 μg/m3 (3) 2.8 μg/m3 (12) 32.0
 
March 21, 2019, 2 a.m. 6.8 ppb (6) -0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 42.0 ppb (32) N/A 5.0 μg/m3 (5) 4.0 μg/m3 (17) 32.0
 
March 21, 2019, 1 a.m. 6.4 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 44.0 ppb (34) N/A 7.0 μg/m3 (6) 4.4 μg/m3 (18) 34.0
 
March 21, 2019, midnight 5.6 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 45.0 ppb (35) N/A 9.0 μg/m3 (8) 3.7 μg/m3 (15) 35.0
 
March 20, 2019, 11 p.m. 4.5 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) N/A 15.0 μg/m3 (14) 3.2 μg/m3 (13) 35.0
 
March 20, 2019, 10 p.m. 3.6 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) 0.24 ppb (3) 11.0 μg/m3 (10) 3.9 μg/m3 (16) 36.0
 
March 20, 2019, 9 p.m. 3.0 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) 0.24 ppb (3) 10.0 μg/m3 (9) 5.2 μg/m3 (22) 35.0
 
March 20, 2019, 8 p.m. 3.0 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 48.0 ppb (37) 0.23 ppb (3) 10.0 μg/m3 (9) 6.6 μg/m3 (28) 37.0
 
March 20, 2019, 7 p.m. 2.5 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) 0.23 ppb (3) 11.0 μg/m3 (10) 4.9 μg/m3 (20) 38.0
 
March 20, 2019, 6 p.m. 3.1 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) 0.24 ppb (3) 14.0 μg/m3 (13) 4.4 μg/m3 (18) 36.0
 
March 20, 2019, 5 p.m. 4.8 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) 0.26 ppb (3) 22.0 μg/m3 (20) 8.6 μg/m3 (36) 36.0
 
March 20, 2019, 4 p.m. 7.0 ppb (6) 1.1 ppb (1) N/A 6.0 ppb (6) N/A N/A 39.0 ppb (30) 0.27 ppb (3) 20.0 μg/m3 (18) 9.9 μg/m3 (41) 41.0
 
March 20, 2019, 3 p.m. 19.6 ppb (18) 3.1 ppb (3) N/A 17.0 ppb (16) N/A N/A 24.0 ppb (18) 0.36 ppb (4) 22.0 μg/m3 (20) 9.1 μg/m3 (38) 38.0
 
March 20, 2019, 2 p.m. 14.0 ppb (13) 0.6 ppb (1) N/A 13.0 ppb (12) N/A N/A 27.0 ppb (21) 0.46 ppb (5) 18.0 μg/m3 (16) 9.2 μg/m3 (38) 38.0
 
March 20, 2019, 1 p.m. 13.1 ppb (12) 0.4 ppb (0) N/A 13.0 ppb (12) N/A N/A 29.0 ppb (22) 0.29 ppb (3) 16.0 μg/m3 (15) 6.9 μg/m3 (29) 29.0
 
March 20, 2019, noon 13.5 ppb (12) 2.1 ppb (2) N/A 11.0 ppb (10) N/A N/A 31.0 ppb (24) 0.27 ppb (3) 18.0 μg/m3 (16) 6.0 μg/m3 (25) 25.0
 
March 20, 2019, 11 a.m. 3.3 ppb (3) -0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (29) 0.24 ppb (3) 10.0 μg/m3 (9) 5.2 μg/m3 (22) 29.0
 
March 20, 2019, 10 a.m. 2.5 ppb (2) -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) 0.23 ppb (3) 12.0 μg/m3 (11) 5.0 μg/m3 (21) 31.0
 
March 20, 2019, 9 a.m. 2.6 ppb (2) -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (32) 0.23 ppb (3) 12.0 μg/m3 (11) 5.6 μg/m3 (23) 32.0
 
March 20, 2019, 8 a.m. 2.3 ppb (2) -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) 0.23 ppb (3) 11.0 μg/m3 (10) 5.2 μg/m3 (22) 32.0
 
March 20, 2019, 7 a.m. 2.1 ppb (2) -0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) 0.25 ppb (3) 11.0 μg/m3 (10) 4.4 μg/m3 (18) 34.0
 
March 20, 2019, 6 a.m. 1.8 ppb (2) -0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) 0.26 ppb (3) 12.0 μg/m3 (11) 4.9 μg/m3 (20) 35.0
 
March 20, 2019, 5 a.m. 1.7 ppb (2) -0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) 0.25 ppb (3) 11.0 μg/m3 (10) 6.1 μg/m3 (25) 34.0
 
March 20, 2019, 4 a.m. 2.4 ppb (2) -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (33) 0.27 ppb (3) 15.0 μg/m3 (14) 6.1 μg/m3 (25) 33.0
 
March 20, 2019, 3 a.m. 4.0 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) 0.28 ppb (3) 14.0 μg/m3 (13) 7.1 μg/m3 (30) 32.0
 
March 20, 2019, 2 a.m. 4.2 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) 0.29 ppb (3) 20.0 μg/m3 (18) 10.3 μg/m3 (43) 43.0
 
March 20, 2019, 1 a.m. 3.2 ppb (3) -0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) 0.27 ppb (3) 14.0 μg/m3 (13) 11.0 μg/m3 (46) 46.0
 
March 20, 2019, midnight 2.6 ppb (2) -0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) 0.26 ppb (3) 19.0 μg/m3 (17) 10.1 μg/m3 (42) 42.0
 
March 19, 2019, 11 p.m. 3.8 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 49.0 ppb (38) 0.27 ppb (3) 21.0 μg/m3 (19) 8.3 μg/m3 (35) 38.0
 
March 19, 2019, 10 p.m. 3.8 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 53.0 ppb (41) 0.27 ppb (3) 19.0 μg/m3 (17) 5.4 μg/m3 (23) 41.0
 
March 19, 2019, 9 p.m. 4.0 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 54.0 ppb (42) 0.26 ppb (3) 19.0 μg/m3 (17) 5.6 μg/m3 (23) 42.0
 
March 19, 2019, 8 p.m. 4.1 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 52.0 ppb (40) 0.25 ppb (3) 22.0 μg/m3 (20) 8.8 μg/m3 (37) 40.0
 
March 19, 2019, 7 p.m. 4.9 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 51.0 ppb (39) 0.26 ppb (3) 25.0 μg/m3 (23) 10.3 μg/m3 (43) 43.0
 
March 19, 2019, 6 p.m. 7.8 ppb (7) 1.4 ppb (1) N/A 6.0 ppb (6) N/A N/A 48.0 ppb (37) 0.31 ppb (3) 24.0 μg/m3 (22) 15.7 μg/m3 (58) 58.0
 
March 19, 2019, 5 p.m. 13.6 ppb (13) 3.0 ppb (3) N/A 11.0 ppb (10) N/A N/A 37.0 ppb (28) 0.43 ppb (5) 26.0 μg/m3 (24) 23.0 μg/m3 (73) 73.0
 
March 19, 2019, 4 p.m. 21.3 ppb (20) 5.6 ppb (5) N/A 16.0 ppb (15) N/A N/A 23.0 ppb (18) 0.52 ppb (6) 35.0 μg/m3 (32) 24.7 μg/m3 (77) 77.0
 
March 19, 2019, 3 p.m. 17.4 ppb (16) 2.3 ppb (2) N/A 15.0 ppb (14) N/A N/A 18.0 ppb (14) 0.47 ppb (5) 20.0 μg/m3 (18) 20.4 μg/m3 (68) 68.0
 
March 19, 2019, 2 p.m. 23.8 ppb (22) 3.4 ppb (3) N/A 20.0 ppb (19) N/A N/A 8.0 ppb (6) 0.58 ppb (6) 21.0 μg/m3 (19) 20.9 μg/m3 (69) 69.0
 
March 19, 2019, 1 p.m. 38.1 ppb (35) 14.0 ppb (13) N/A 24.0 ppb (22) N/A N/A 1.0 ppb (1) 0.71 ppb (8) 23.0 μg/m3 (21) 10.3 μg/m3 (43) 43.0
 
March 19, 2019, noon 53.9 ppb (50) 24.8 ppb (23) N/A 29.0 ppb (27) N/A N/A -1.0 ppb (0) 0.71 ppb (8) 26.0 μg/m3 (24) 11.5 μg/m3 (48) 50.0
 
March 19, 2019, 11 a.m. 8.5 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A N/A 26.0 ppb (20) 0.37 ppb (4) 17.0 μg/m3 (15) 12.2 μg/m3 (50) 50.0
 
March 19, 2019, 10 a.m. 6.9 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A N/A 25.0 ppb (19) 0.33 ppb (4) 23.0 μg/m3 (21) 11.2 μg/m3 (47) 47.0
 
March 19, 2019, 9 a.m. 6.8 ppb (6) -0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A 27.0 ppb (21) 0.34 ppb (4) 12.0 μg/m3 (11) 8.6 μg/m3 (36) 36.0
 
March 19, 2019, 8 a.m. 8.4 ppb (8) 0.1 ppb (0) N/A 8.0 ppb (7) N/A N/A 28.0 ppb (22) 0.35 ppb (4) 17.0 μg/m3 (15) 8.8 μg/m3 (37) 37.0
 
March 19, 2019, 7 a.m. 9.0 ppb (8) 0.0 ppb (0) N/A 9.0 ppb (8) N/A N/A 31.0 ppb (24) 0.39 ppb (4) 13.0 μg/m3 (12) 11.5 μg/m3 (48) 48.0
 
March 19, 2019, 6 a.m. 8.6 ppb (8) 0.0 ppb (0) N/A 9.0 ppb (8) N/A N/A 34.0 ppb (26) 0.34 ppb (4) 13.0 μg/m3 (12) 11.3 μg/m3 (47) 47.0
 
March 19, 2019, 5 a.m. 4.5 ppb (4) -0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 45.0 ppb (35) 0.29 ppb (3) 15.0 μg/m3 (14) 9.4 μg/m3 (39) 39.0
 
March 19, 2019, 4 a.m. 4.7 ppb (4) -0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 46.0 ppb (35) 0.28 ppb (3) 16.0 μg/m3 (15) 6.0 μg/m3 (25) 35.0
 
March 19, 2019, 3 a.m. 5.0 ppb (5) -0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 48.0 ppb (37) 0.28 ppb (3) 15.0 μg/m3 (14) 3.0 μg/m3 (12) 37.0
 
March 19, 2019, 2 a.m. 6.4 ppb (6) -0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 49.0 ppb (38) 0.3 ppb (3) 10.0 μg/m3 (9) 1.3 μg/m3 (5) 38.0
 
March 19, 2019, 1 a.m. 5.5 ppb (5) -0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 55.0 ppb (42) 0.29 ppb (3) 9.0 μg/m3 (8) 0.1 μg/m3 (0) 42.0
 
March 19, 2019, midnight 6.5 ppb (6) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 59.0 ppb (45) 0.29 ppb (3) 12.0 μg/m3 (11) 2.2 μg/m3 (9) 45.0
 
March 18, 2019, 11 p.m. 4.6 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 64.0 ppb (49) 0.28 ppb (3) 14.0 μg/m3 (13) 4.4 μg/m3 (18) 49.0
 
March 18, 2019, 10 p.m. 5.8 ppb (5) 0.4 ppb (0) N/A 5.0 ppb (5) N/A N/A 63.0 ppb (48) 0.3 ppb (3) 23.0 μg/m3 (21) 5.6 μg/m3 (23) 48.0
 
March 18, 2019, 9 p.m. 5.6 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 66.0 ppb (51) 0.29 ppb (3) 29.0 μg/m3 (26) 4.9 μg/m3 (20) 51.0
 
March 18, 2019, 8 p.m. 5.2 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 68.0 ppb (52) 0.3 ppb (3) 22.0 μg/m3 (20) 5.9 μg/m3 (25) 52.0
 
March 18, 2019, 7 p.m. 8.1 ppb (8) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A 67.0 ppb (52) 0.34 ppb (4) 27.0 μg/m3 (25) 10.7 μg/m3 (45) 52.0
 
March 18, 2019, 6 p.m. 34.2 ppb (32) 8.0 ppb (7) N/A 26.0 ppb (24) N/A N/A 39.0 ppb (30) 0.64 ppb (7) 43.0 μg/m3 (39) 12.9 μg/m3 (52) 52.0
 
March 18, 2019, 5 p.m. 33.4 ppb (31) 8.7 ppb (8) N/A 25.0 ppb (23) N/A N/A 32.0 ppb (25) 0.63 ppb (7) 35.0 μg/m3 (32) 13.2 μg/m3 (53) 53.0
 
March 18, 2019, 4 p.m. 53.2 ppb (49) 21.7 ppb (20) N/A 31.0 ppb (29) N/A N/A 17.0 ppb (13) 0.76 ppb (8) 55.0 μg/m3 (50) 19.6 μg/m3 (66) 66.0
 
March 18, 2019, 3 p.m. 53.6 ppb (50) 23.1 ppb (21) N/A 31.0 ppb (29) N/A N/A 10.0 ppb (8) 0.76 ppb (8) 56.0 μg/m3 (50) 22.4 μg/m3 (72) 72.0
 
March 18, 2019, 2 p.m. 65.8 ppb (63) 31.6 ppb (29) N/A 34.0 ppb (31) N/A N/A 1.0 ppb (1) 0.89 ppb (10) 44.0 μg/m3 (40) 17.9 μg/m3 (63) 63.0
 
March 18, 2019, 1 p.m. 68.0 ppb (65) 33.1 ppb (31) N/A 35.0 ppb (32) N/A N/A -1.0 ppb (0) 0.86 ppb (10) 33.0 μg/m3 (30) 7.9 μg/m3 (33) 65.0
 
March 18, 2019, noon 60.8 ppb (57) 26.1 ppb (24) N/A 35.0 ppb (32) N/A N/A -1.0 ppb (0) 0.68 ppb (8) 21.0 μg/m3 (19) 9.4 μg/m3 (39) 57.0
 
March 18, 2019, 11 a.m. 29.0 ppb (27) 2.3 ppb (2) N/A 27.0 ppb (25) N/A N/A 8.0 ppb (6) 0.48 ppb (5) 21.0 μg/m3 (19) 9.7 μg/m3 (40) 40.0
 
March 18, 2019, 10 a.m. 19.5 ppb (18) 0.5 ppb (0) N/A 19.0 ppb (18) N/A N/A 18.0 ppb (14) 0.45 ppb (5) 21.0 μg/m3 (19) 9.7 μg/m3 (40) 40.0
 
March 18, 2019, 9 a.m. 17.7 ppb (16) 0.3 ppb (0) N/A 17.0 ppb (16) N/A N/A 27.0 ppb (21) 0.46 ppb (5) 22.0 μg/m3 (20) 9.7 μg/m3 (40) 40.0
 
March 18, 2019, 8 a.m. 16.2 ppb (15) 0.3 ppb (0) N/A 16.0 ppb (15) N/A N/A 34.0 ppb (26) 0.43 ppb (5) 22.0 μg/m3 (20) 7.7 μg/m3 (32) 32.0
 
March 18, 2019, 7 a.m. 12.6 ppb (12) 0.6 ppb (1) N/A 12.0 ppb (11) N/A N/A 38.0 ppb (29) 0.39 ppb (4) 20.0 μg/m3 (18) 7.4 μg/m3 (31) 31.0
 
March 18, 2019, 6 a.m. 9.2 ppb (9) 0.0 ppb (0) N/A 9.0 ppb (8) N/A N/A 43.0 ppb (33) 0.37 ppb (4) 20.0 μg/m3 (18) 6.7 μg/m3 (28) 33.0
 
March 18, 2019, 5 a.m. 11.9 ppb (11) 0.0 ppb (0) N/A 12.0 ppb (11) N/A N/A 42.0 ppb (32) 0.4 ppb (4) 18.0 μg/m3 (16) 5.2 μg/m3 (22) 32.0
 
March 18, 2019, 4 a.m. 11.6 ppb (11) 0.0 ppb (0) N/A 12.0 ppb (11) N/A N/A 47.0 ppb (36) 0.41 ppb (5) 20.0 μg/m3 (18) 6.9 μg/m3 (29) 36.0
 
March 18, 2019, 3 a.m. 16.9 ppb (16) 0.0 ppb (0) N/A 17.0 ppb (16) N/A N/A 42.0 ppb (32) 0.45 ppb (5) 28.0 μg/m3 (25) 5.0 μg/m3 (21) 32.0
 
March 18, 2019, 2 a.m. 11.7 ppb (11) -0.2 ppb (0) N/A 12.0 ppb (11) N/A N/A 47.0 ppb (36) 0.38 ppb (4) 18.0 μg/m3 (16) 2.0 μg/m3 (8) 36.0
 
March 18, 2019, 1 a.m. 8.9 ppb (8) 0.2 ppb (0) N/A 9.0 ppb (8) N/A N/A 56.0 ppb (43) 0.31 ppb (3) 15.0 μg/m3 (14) 2.7 μg/m3 (11) 43.0
 
March 18, 2019, midnight 6.4 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 61.0 ppb (47) 0.29 ppb (3) 17.0 μg/m3 (15) 4.9 μg/m3 (20) 47.0
 
March 17, 2019, 11 p.m. 5.6 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 58.0 ppb (45) 0.27 ppb (3) 16.0 μg/m3 (15) 5.1 μg/m3 (21) 45.0
 
March 17, 2019, 10 p.m. 7.2 ppb (7) 0.5 ppb (0) N/A 7.0 ppb (6) N/A N/A 63.0 ppb (48) 0.3 ppb (3) 19.0 μg/m3 (17) 3.9 μg/m3 (16) 48.0
 
March 17, 2019, 9 p.m. 4.4 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 59.0 ppb (45) 0.27 ppb (3) 12.0 μg/m3 (11) 4.9 μg/m3 (20) 45.0
 
March 17, 2019, 8 p.m. 3.1 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 55.0 ppb (42) 0.25 ppb (3) 14.0 μg/m3 (13) 4.2 μg/m3 (18) 42.0
 
March 17, 2019, 7 p.m. 5.0 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 52.0 ppb (40) 0.26 ppb (3) 11.0 μg/m3 (10) 2.2 μg/m3 (9) 40.0
 
March 17, 2019, 6 p.m. 6.3 ppb (6) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 49.0 ppb (38) 0.3 ppb (3) 12.0 μg/m3 (11) 4.2 μg/m3 (18) 38.0
 
March 17, 2019, 5 p.m. 11.2 ppb (10) 2.3 ppb (2) N/A 9.0 ppb (8) N/A N/A 39.0 ppb (30) 0.34 ppb (4) 15.0 μg/m3 (14) 9.7 μg/m3 (40) 40.0
 
March 17, 2019, 4 p.m. 17.1 ppb (16) 4.3 ppb (4) N/A 13.0 ppb (12) N/A N/A 28.0 ppb (22) 0.42 ppb (5) 17.0 μg/m3 (15) 11.1 μg/m3 (46) 46.0
 
March 17, 2019, 3 p.m. 23.2 ppb (21) 6.3 ppb (6) N/A 17.0 ppb (16) N/A N/A 18.0 ppb (14) 0.48 ppb (5) 28.0 μg/m3 (25) 7.2 μg/m3 (30) 30.0
 
March 17, 2019, 2 p.m. 28.7 ppb (27) 4.9 ppb (5) N/A 24.0 ppb (22) N/A N/A 10.0 ppb (8) 0.53 ppb (6) 25.0 μg/m3 (23) 4.3 μg/m3 (18) 27.0
 
March 17, 2019, 1 p.m. 38.9 ppb (36) 7.5 ppb (7) N/A 31.0 ppb (29) N/A N/A 2.0 ppb (2) 0.55 ppb (6) 10.0 μg/m3 (9) 6.2 μg/m3 (26) 36.0
 
March 17, 2019, noon 35.3 ppb (33) 4.9 ppb (5) N/A 30.0 ppb (28) N/A N/A 1.0 ppb (1) 0.52 ppb (6) 20.0 μg/m3 (18) 6.9 μg/m3 (29) 33.0
 
March 17, 2019, 11 a.m. 36.5 ppb (34) 6.5 ppb (6) N/A 30.0 ppb (28) N/A N/A 1.0 ppb (1) 0.7 ppb (8) 10.0 μg/m3 (9) 5.7 μg/m3 (24) 34.0
 
March 17, 2019, 10 a.m. 32.2 ppb (30) 2.5 ppb (2) N/A 30.0 ppb (28) N/A N/A 3.0 ppb (2) 0.74 ppb (8) 19.0 μg/m3 (17) 7.7 μg/m3 (32) 32.0
 
March 17, 2019, 9 a.m. 49.9 ppb (46) 15.7 ppb (15) N/A 34.0 ppb (31) N/A N/A 0.0 ppb (0) 0.99 ppb (11) 24.0 μg/m3 (22) 8.4 μg/m3 (35) 46.0
 
March 17, 2019, 8 a.m. 43.2 ppb (40) 7.9 ppb (7) N/A 35.0 ppb (32) N/A N/A 0.0 ppb (0) 0.89 ppb (10) 24.0 μg/m3 (22) 8.2 μg/m3 (34) 40.0
 
March 17, 2019, 7 a.m. 41.1 ppb (38) 4.2 ppb (4) N/A 37.0 ppb (34) N/A N/A 2.0 ppb (2) 0.9 ppb (10) 28.0 μg/m3 (25) 8.9 μg/m3 (37) 38.0
 
March 17, 2019, 6 a.m. 30.3 ppb (28) 0.9 ppb (1) N/A 29.0 ppb (27) N/A N/A 13.0 ppb (10) 0.73 ppb (8) 27.0 μg/m3 (25) 10.1 μg/m3 (42) 42.0
 
March 17, 2019, 5 a.m. 20.4 ppb (19) 0.4 ppb (0) N/A 20.0 ppb (19) N/A N/A 28.0 ppb (22) 0.57 ppb (6) 17.0 μg/m3 (15) 8.9 μg/m3 (37) 37.0
 
March 17, 2019, 4 a.m. 35.2 ppb (33) 0.8 ppb (1) N/A 34.0 ppb (31) N/A N/A 15.0 ppb (12) 0.69 ppb (8) 29.0 μg/m3 (26) 3.5 μg/m3 (15) 33.0
 
March 17, 2019, 3 a.m. 15.9 ppb (15) 0.3 ppb (0) N/A 16.0 ppb (15) N/A N/A 36.0 ppb (28) 0.42 ppb (5) 13.0 μg/m3 (12) 2.0 μg/m3 (8) 28.0
 
March 17, 2019, 2 a.m. 19.3 ppb (18) 0.1 ppb (0) N/A 19.0 ppb (18) N/A N/A 39.0 ppb (30) 0.42 ppb (5) 17.0 μg/m3 (15) 3.3 μg/m3 (14) 30.0
 
March 17, 2019, 1 a.m. 8.1 ppb (8) -0.2 ppb (0) N/A 8.0 ppb (7) N/A N/A 56.0 ppb (43) 0.31 ppb (3) 6.0 μg/m3 (5) 2.5 μg/m3 (10) 43.0
 
March 17, 2019, midnight 7.3 ppb (7) 0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 58.0 ppb (45) 0.32 ppb (4) 17.0 μg/m3 (15) 1.8 μg/m3 (8) 45.0
 
March 16, 2019, 11 p.m. 4.9 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 58.0 ppb (45) 0.28 ppb (3) 8.0 μg/m3 (7) -0.9 μg/m3 (0) 45.0
 
March 16, 2019, 10 p.m. 2.8 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 57.0 ppb (44) 0.25 ppb (3) 6.0 μg/m3 (5) -1.7 μg/m3 (0) 44.0
 
March 16, 2019, 9 p.m. 4.1 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 55.0 ppb (42) 0.26 ppb (3) 10.0 μg/m3 (9) 1.0 μg/m3 (4) 42.0
 
March 16, 2019, 8 p.m. 3.6 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 52.0 ppb (40) 0.26 ppb (3) 13.0 μg/m3 (12) 0.1 μg/m3 (0) 40.0
 
March 16, 2019, 7 p.m. 3.9 ppb (4) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 51.0 ppb (39) 0.29 ppb (3) 19.0 μg/m3 (17) 0.4 μg/m3 (2) 39.0