AQSQID: 560210100

Site Name: Cheyenne

Location: Cheyenne, WY

Reporting: True, Located: True

Current AQI: 35.0

Cheyenne WY, US: 41.18222, -104.778336

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 20, 2019, 11 p.m. 1.2 ppb (1) -0.1 ppb (0) -0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (35) 0.33 ppb (4) 3.0 μg/m3 (3) -1.0 μg/m3 (0) 35.0
 
March 20, 2019, 10 p.m. 1.3 ppb (1) 0.1 ppb (0) 0.0 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 47.0 ppb (36) 0.36 ppb (4) 5.0 μg/m3 (5) 0.0 μg/m3 (0) 36.0
 
March 20, 2019, 9 p.m. 1.6 ppb (1) 0.4 ppb (0) 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 47.0 ppb (36) 0.36 ppb (4) 6.0 μg/m3 (5) 0.0 μg/m3 (0) 36.0
 
March 20, 2019, 8 p.m. 1.7 ppb (2) 0.5 ppb (0) 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 48.0 ppb (37) 0.34 ppb (4) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 37.0
 
March 20, 2019, 7 p.m. 1.7 ppb (2) 0.5 ppb (0) 0.7 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (37) 0.28 ppb (3) 19.0 μg/m3 (17) 8.0 μg/m3 (33) 37.0
 
March 20, 2019, 6 p.m. 2.0 ppb (2) 0.6 ppb (1) 1.0 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (38) 0.24 ppb (3) 17.0 μg/m3 (15) 16.0 μg/m3 (59) 59.0
 
March 20, 2019, 5 p.m. 2.1 ppb (2) 0.2 ppb (0) 0.7 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (38) 0.2 ppb (2) 8.0 μg/m3 (7) 4.0 μg/m3 (17) 38.0
 
March 20, 2019, 4 p.m. 2.2 ppb (2) 0.2 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) 0.19 ppb (2) 9.0 μg/m3 (8) 2.0 μg/m3 (8) 38.0
 
March 20, 2019, 3 p.m. 1.9 ppb (2) -0.3 ppb (0) 0.3 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) 0.17 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 37.0
 
March 20, 2019, 2 p.m. 2.0 ppb (2) -0.2 ppb (0) 0.5 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) 0.17 ppb (2) 2.0 μg/m3 (2) 5.0 μg/m3 (21) 37.0
 
March 20, 2019, 1 p.m. 1.6 ppb (1) 0.1 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (37) 0.17 ppb (2) 6.0 μg/m3 (5) 6.0 μg/m3 (25) 37.0
 
March 20, 2019, noon 2.0 ppb (2) -0.3 ppb (0) 0.3 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) 0.16 ppb (2) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 37.0
 
March 20, 2019, 11 a.m. 3.1 ppb (3) 0.2 ppb (0) 1.8 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) 0.17 ppb (2) 7.0 μg/m3 (6) 0.0 μg/m3 (0) 35.0
 
March 20, 2019, 10 a.m. 2.2 ppb (2) -0.2 ppb (0) 0.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) 0.17 ppb (2) 6.0 μg/m3 (5) 0.0 μg/m3 (0) 35.0
 
March 20, 2019, 9 a.m. 1.7 ppb (2) -0.3 ppb (0) 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (37) 0.17 ppb (2) 4.0 μg/m3 (4) 3.0 μg/m3 (12) 37.0
 
March 20, 2019, 8 a.m. 1.7 ppb (2) -0.2 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (36) 0.19 ppb (2) 3.0 μg/m3 (3) 5.0 μg/m3 (21) 36.0
 
March 20, 2019, 7 a.m. 2.2 ppb (2) -0.3 ppb (0) 0.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) 0.2 ppb (2) 2.0 μg/m3 (2) 1.0 μg/m3 (4) 35.0
 
March 20, 2019, 6 a.m. 1.9 ppb (2) -0.3 ppb (0) 0.4 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) 0.21 ppb (2) 3.0 μg/m3 (3) N/A 35.0
 
March 20, 2019, 5 a.m. 2.2 ppb (2) -0.4 ppb (0) 0.5 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) 0.22 ppb (2) -2.0 μg/m3 (0) N/A 37.0
 
March 20, 2019, 4 a.m. 1.8 ppb (2) -0.5 ppb (0) -0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 48.0 ppb (37) 0.23 ppb (3) N/A N/A 37.0
 
March 20, 2019, 3 a.m. 1.3 ppb (1) -0.3 ppb (0) -0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 51.0 ppb (39) 0.26 ppb (3) 2.0 μg/m3 (2) -4.0 μg/m3 (0) 39.0
 
March 20, 2019, 2 a.m. 1.3 ppb (1) -0.4 ppb (0) -0.5 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 53.0 ppb (41) 0.28 ppb (3) 6.0 μg/m3 (5) N/A 41.0
 
March 20, 2019, 1 a.m. 1.3 ppb (1) -0.2 ppb (0) -0.2 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 54.0 ppb (42) 0.3 ppb (3) 7.0 μg/m3 (6) -3.0 μg/m3 (0) 42.0
 
March 20, 2019, midnight 1.4 ppb (1) 0.1 ppb (0) 0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 53.0 ppb (41) 0.32 ppb (4) 7.0 μg/m3 (6) 2.0 μg/m3 (8) 41.0
 
March 19, 2019, 11 p.m. 1.5 ppb (1) 0.3 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 52.0 ppb (40) 0.32 ppb (4) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 40.0
 
March 19, 2019, 10 p.m. 1.5 ppb (1) 0.3 ppb (0) 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 51.0 ppb (39) 0.29 ppb (3) 7.0 μg/m3 (6) 0.0 μg/m3 (0) 39.0
 
March 19, 2019, 9 p.m. 1.6 ppb (1) 0.3 ppb (0) 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 50.0 ppb (38) 0.26 ppb (3) 12.0 μg/m3 (11) 6.0 μg/m3 (25) 38.0
 
March 19, 2019, 8 p.m. 1.8 ppb (2) 0.6 ppb (1) 1.1 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 49.0 ppb (38) 0.23 ppb (3) 15.0 μg/m3 (14) 12.0 μg/m3 (50) 50.0
 
March 19, 2019, 7 p.m. 2.0 ppb (2) 0.6 ppb (1) 1.3 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 48.0 ppb (37) 0.2 ppb (2) 16.0 μg/m3 (15) 17.0 μg/m3 (61) 61.0
 
March 19, 2019, 6 p.m. 2.1 ppb (2) 0.3 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 46.0 ppb (35) 0.16 ppb (2) 13.0 μg/m3 (12) 6.0 μg/m3 (25) 35.0
 
March 19, 2019, 5 p.m. 2.5 ppb (2) 0.2 ppb (0) 1.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) 0.14 ppb (2) 4.0 μg/m3 (4) 5.0 μg/m3 (21) 33.0
 
March 19, 2019, 4 p.m. 2.6 ppb (2) -0.1 ppb (0) 1.5 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (32) 0.13 ppb (1) 7.0 μg/m3 (6) 6.0 μg/m3 (25) 32.0
 
March 19, 2019, 3 p.m. 2.3 ppb (2) -0.2 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) 0.13 ppb (1) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 32.0
 
March 19, 2019, 2 p.m. 2.2 ppb (2) -0.2 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) 0.12 ppb (1) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 32.0
 
March 19, 2019, 1 p.m. 1.9 ppb (2) -0.1 ppb (0) 0.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) 0.12 ppb (1) 9.0 μg/m3 (8) 2.0 μg/m3 (8) 33.0
 
March 19, 2019, noon 2.4 ppb (2) -0.2 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) 0.12 ppb (1) 9.0 μg/m3 (8) 4.0 μg/m3 (17) 34.0
 
March 19, 2019, 11 a.m. 2.4 ppb (2) -0.2 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) 0.13 ppb (1) 7.0 μg/m3 (6) 3.0 μg/m3 (12) 33.0
 
March 19, 2019, 10 a.m. 2.2 ppb (2) -0.2 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 44.0 ppb (34) 0.14 ppb (2) 8.0 μg/m3 (7) 1.0 μg/m3 (4) 34.0
 
March 19, 2019, 9 a.m. 2.0 ppb (2) -0.1 ppb (0) 0.8 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) 0.2 ppb (2) 8.0 μg/m3 (7) 1.0 μg/m3 (4) 33.0
 
March 19, 2019, 8 a.m. 1.9 ppb (2) -0.4 ppb (0) 0.4 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) 0.2 ppb (2) 7.0 μg/m3 (6) -1.0 μg/m3 (0) 33.0
 
March 19, 2019, 7 a.m. 3.5 ppb (3) -0.2 ppb (0) 2.9 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 38.0 ppb (29) 0.23 ppb (3) 8.0 μg/m3 (7) 0.0 μg/m3 (0) 29.0
 
March 19, 2019, 6 a.m. 5.3 ppb (5) -0.2 ppb (0) 5.6 ppb (5) 6.0 ppb (6) N/A 1.0 ppb (1) 36.0 ppb (28) 0.25 ppb (3) 9.0 μg/m3 (8) 3.0 μg/m3 (12) 28.0
 
March 19, 2019, 5 a.m. 5.2 ppb (5) -0.4 ppb (0) 5.0 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (1) 36.0 ppb (28) 0.26 ppb (3) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 28.0
 
March 19, 2019, 4 a.m. 3.1 ppb (3) -0.3 ppb (0) 2.7 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 41.0 ppb (32) 0.27 ppb (3) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 32.0
 
March 19, 2019, 3 a.m. 2.2 ppb (2) -0.3 ppb (0) 1.5 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 47.0 ppb (36) 0.26 ppb (3) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 36.0
 
March 19, 2019, 2 a.m. 1.6 ppb (1) -0.6 ppb (0) 0.0 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 49.0 ppb (38) 0.25 ppb (3) 4.0 μg/m3 (4) -1.0 μg/m3 (0) 38.0
 
March 19, 2019, 1 a.m. 1.6 ppb (1) -0.2 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 49.0 ppb (38) 0.3 ppb (3) 4.0 μg/m3 (4) 2.0 μg/m3 (8) 38.0
 
March 19, 2019, midnight 1.9 ppb (2) 0.1 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 50.0 ppb (38) 0.33 ppb (4) 6.0 μg/m3 (5) 4.0 μg/m3 (17) 38.0
 
March 18, 2019, 11 p.m. 2.8 ppb (3) 0.3 ppb (0) 2.4 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 49.0 ppb (38) 0.33 ppb (4) 10.0 μg/m3 (9) 3.0 μg/m3 (12) 38.0
 
March 18, 2019, 10 p.m. 4.0 ppb (4) 1.0 ppb (1) 3.9 ppb (4) 3.0 ppb (3) N/A 1.0 ppb (1) 45.0 ppb (35) 0.34 ppb (4) 9.0 μg/m3 (8) 3.0 μg/m3 (12) 35.0
 
March 18, 2019, 9 p.m. 5.1 ppb (5) 1.5 ppb (1) 5.0 ppb (5) 3.0 ppb (3) N/A 2.0 ppb (3) 42.0 ppb (32) 0.32 ppb (4) 12.0 μg/m3 (11) 4.0 μg/m3 (17) 32.0
 
March 18, 2019, 8 p.m. 6.4 ppb (6) 2.1 ppb (2) 6.0 ppb (6) 4.0 ppb (4) N/A 2.0 ppb (3) 40.0 ppb (31) 0.27 ppb (3) 16.0 μg/m3 (15) 2.0 μg/m3 (8) 31.0
 
March 18, 2019, 7 p.m. 6.3 ppb (6) 2.1 ppb (2) 5.7 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) 38.0 ppb (29) 0.22 ppb (2) 34.0 μg/m3 (31) 22.0 μg/m3 (71) 71.0
 
March 18, 2019, 6 p.m. 5.8 ppb (5) 1.5 ppb (1) 4.7 ppb (4) 3.0 ppb (3) N/A 1.0 ppb (1) 36.0 ppb (28) 0.18 ppb (2) 9.0 μg/m3 (8) 5.0 μg/m3 (21) 28.0
 
March 18, 2019, 5 p.m. 10.9 ppb (10) 2.0 ppb (2) 9.2 ppb (9) 7.0 ppb (6) N/A 1.0 ppb (1) 32.0 ppb (25) 0.19 ppb (2) 12.0 μg/m3 (11) 6.0 μg/m3 (25) 25.0
 
March 18, 2019, 4 p.m. 16.7 ppb (15) 1.8 ppb (2) 15.3 ppb (14) 14.0 ppb (13) N/A 1.0 ppb (1) 21.0 ppb (16) 0.28 ppb (3) 12.0 μg/m3 (11) 6.0 μg/m3 (25) 25.0
 
March 18, 2019, 3 p.m. 6.8 ppb (6) -0.1 ppb (0) 5.2 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 28.0 ppb (22) 0.15 ppb (2) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 22.0
 
March 18, 2019, 2 p.m. 3.8 ppb (4) 0.1 ppb (0) 2.6 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (25) 0.14 ppb (2) 4.0 μg/m3 (4) 5.0 μg/m3 (21) 25.0
 
March 18, 2019, 1 p.m. 3.3 ppb (3) -0.1 ppb (0) 2.1 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 35.0 ppb (27) 0.14 ppb (2) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 27.0
 
March 18, 2019, noon 2.0 ppb (2) 0.0 ppb (0) 3.1 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) 0.13 ppb (1) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 28.0
 
March 18, 2019, 11 a.m. N/A -0.2 ppb (0) 1.7 ppb (2) 2.0 ppb (2) N/A N/A N/A N/A 5.0 μg/m3 (5) 5.0 μg/m3 (21) 21.0
 
March 18, 2019, 10 a.m. 12.5 ppb (12) -0.1 ppb (0) 8.3 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 29.0 ppb (22) 0.21 ppb (2) 6.0 μg/m3 (5) 6.0 μg/m3 (25) 25.0
 
March 18, 2019, 9 a.m. 15.2 ppb (14) 0.2 ppb (0) 16.9 ppb (16) 17.0 ppb (16) N/A 0.0 ppb (0) 19.0 ppb (15) 0.25 ppb (3) 7.0 μg/m3 (6) 1.0 μg/m3 (4) 16.0
 
March 18, 2019, 8 a.m. 12.8 ppb (12) -0.1 ppb (0) 11.8 ppb (11) 12.0 ppb (11) N/A 0.0 ppb (0) 21.0 ppb (16) 0.28 ppb (3) 10.0 μg/m3 (9) 1.0 μg/m3 (4) 16.0
 
March 18, 2019, 7 a.m. 10.3 ppb (10) -0.2 ppb (0) 9.9 ppb (9) 10.0 ppb (9) N/A 0.0 ppb (0) 25.0 ppb (19) 0.28 ppb (3) 8.0 μg/m3 (7) 3.0 μg/m3 (12) 19.0
 
March 18, 2019, 6 a.m. 5.2 ppb (5) -0.2 ppb (0) 3.1 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (24) 0.24 ppb (3) 3.0 μg/m3 (3) -1.0 μg/m3 (0) 24.0
 
March 18, 2019, 5 a.m. 4.8 ppb (4) -0.5 ppb (0) 1.3 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (27) 0.26 ppb (3) -4.0 μg/m3 (0) N/A 27.0
 
March 18, 2019, 4 a.m. 2.8 ppb (3) -0.5 ppb (0) 0.7 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) 0.26 ppb (3) -4.0 μg/m3 (0) N/A 28.0
 
March 18, 2019, 3 a.m. 1.8 ppb (2) -0.2 ppb (0) 0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 44.0 ppb (34) 0.28 ppb (3) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 34.0
 
March 18, 2019, 2 a.m. 1.5 ppb (1) 0.1 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 48.0 ppb (37) 0.28 ppb (3) 4.0 μg/m3 (4) 2.0 μg/m3 (8) 37.0
 
March 18, 2019, 1 a.m. 1.4 ppb (1) -0.1 ppb (0) 0.0 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 49.0 ppb (38) 0.26 ppb (3) 2.0 μg/m3 (2) 1.0 μg/m3 (4) 38.0
 
March 18, 2019, midnight 1.4 ppb (1) -0.6 ppb (0) -0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 51.0 ppb (39) 0.25 ppb (3) 1.0 μg/m3 (1) -1.0 μg/m3 (0) 39.0
 
March 17, 2019, 11 p.m. 1.5 ppb (1) -0.1 ppb (0) 0.0 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 52.0 ppb (40) 0.3 ppb (3) 3.0 μg/m3 (3) 0.0 μg/m3 (0) 40.0
 
March 17, 2019, 10 p.m. 1.6 ppb (1) 0.3 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 50.0 ppb (38) 0.33 ppb (4) 4.0 μg/m3 (4) -1.0 μg/m3 (0) 38.0
 
March 17, 2019, 9 p.m. 1.6 ppb (1) 0.5 ppb (0) 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 48.0 ppb (37) 0.32 ppb (4) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 37.0
 
March 17, 2019, 8 p.m. 1.6 ppb (1) 0.5 ppb (0) 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 46.0 ppb (35) 0.27 ppb (3) 8.0 μg/m3 (7) 3.0 μg/m3 (12) 35.0
 
March 17, 2019, 7 p.m. 1.6 ppb (1) 0.6 ppb (1) 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 43.0 ppb (33) 0.22 ppb (2) 15.0 μg/m3 (14) 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 6 p.m. 2.2 ppb (2) 0.8 ppb (1) 1.2 ppb (1) 0.0 ppb (0) N/A 0.0 ppb (0) 41.0 ppb (32) 0.18 ppb (2) 11.0 μg/m3 (10) 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 5 p.m. 2.9 ppb (3) 0.4 ppb (0) 1.4 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) 0.13 ppb (1) 8.0 μg/m3 (7) 1.0 μg/m3 (4) 31.0
 
March 17, 2019, 4 p.m. 4.1 ppb (4) 0.2 ppb (0) 2.3 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 37.0 ppb (28) 0.12 ppb (1) 6.0 μg/m3 (5) 0.0 μg/m3 (0) 28.0
 
March 17, 2019, 3 p.m. 6.6 ppb (6) -0.1 ppb (0) 4.1 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 34.0 ppb (26) 0.12 ppb (1) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 26.0
 
March 17, 2019, 2 p.m. 6.9 ppb (6) 0.0 ppb (0) 6.1 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (25) 0.13 ppb (1) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 25.0
 
March 17, 2019, 1 p.m. 6.6 ppb (6) -0.1 ppb (0) 6.3 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (28) 0.14 ppb (2) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 28.0
 
March 17, 2019, noon 5.1 ppb (5) -0.2 ppb (0) 4.4 ppb (4) 5.0 ppb (5) N/A 0.0 ppb (0) 42.0 ppb (32) 0.13 ppb (1) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 32.0
 
March 17, 2019, 11 a.m. 5.6 ppb (5) -0.2 ppb (0) 4.6 ppb (4) 5.0 ppb (5) N/A 0.0 ppb (0) 40.0 ppb (31) 0.13 ppb (1) 7.0 μg/m3 (6) 6.0 μg/m3 (25) 31.0
 
March 17, 2019, 10 a.m. 8.8 ppb (8) 0.0 ppb (0) 8.1 ppb (8) 8.0 ppb (7) N/A 0.0 ppb (0) 35.0 ppb (27) 0.15 ppb (2) 10.0 μg/m3 (9) 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 9 a.m. 11.9 ppb (11) -0.1 ppb (0) 11.1 ppb (10) 11.0 ppb (10) N/A 0.0 ppb (0) 35.0 ppb (27) 0.25 ppb (3) 12.0 μg/m3 (11) 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 8 a.m. 19.1 ppb (18) -0.2 ppb (0) 16.9 ppb (16) 17.0 ppb (16) N/A 0.0 ppb (0) 28.0 ppb (22) 0.31 ppb (3) 15.0 μg/m3 (14) 7.0 μg/m3 (29) 29.0
 
March 17, 2019, 7 a.m. 15.0 ppb (14) -0.4 ppb (0) 13.1 ppb (12) 13.0 ppb (12) N/A 0.0 ppb (0) 33.0 ppb (25) 0.32 ppb (4) 12.0 μg/m3 (11) 5.0 μg/m3 (21) 25.0
 
March 17, 2019, 6 a.m. 9.0 ppb (8) -0.4 ppb (0) 7.7 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 38.0 ppb (29) 0.3 ppb (3) 0.0 μg/m3 (0) N/A 29.0
 
March 17, 2019, 5 a.m. 8.7 ppb (8) -0.7 ppb (0) 7.5 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 39.0 ppb (30) 0.33 ppb (4) -3.0 μg/m3 (0) -4.0 μg/m3 (0) 30.0
 
March 17, 2019, 4 a.m. 5.0 ppb (5) -0.4 ppb (0) 3.9 ppb (4) 4.0 ppb (4) N/A 1.0 ppb (1) 47.0 ppb (36) 0.36 ppb (4) 8.0 μg/m3 (7) 3.0 μg/m3 (12) 36.0
 
March 17, 2019, 3 a.m. 3.0 ppb (3) 0.1 ppb (0) 2.3 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 54.0 ppb (42) 0.37 ppb (4) 11.0 μg/m3 (10) 4.0 μg/m3 (17) 42.0
 
March 17, 2019, 2 a.m. 3.7 ppb (3) 0.4 ppb (0) 3.2 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 56.0 ppb (43) 0.35 ppb (4) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 43.0
 
March 17, 2019, 1 a.m. 3.6 ppb (3) 0.2 ppb (0) 2.8 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 55.0 ppb (42) 0.3 ppb (3) 7.0 μg/m3 (6) 10.0 μg/m3 (42) 42.0
 
March 17, 2019, midnight 3.4 ppb (3) -0.2 ppb (0) 2.4 ppb (2) 3.0 ppb (3) N/A 0.0 ppb (0) 54.0 ppb (42) 0.29 ppb (3) 10.0 μg/m3 (9) 2.0 μg/m3 (8) 42.0
 
March 16, 2019, 11 p.m. 3.9 ppb (4) 0.4 ppb (0) 3.1 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 53.0 ppb (41) 0.34 ppb (4) 6.0 μg/m3 (5) 0.0 μg/m3 (0) 41.0
 
March 16, 2019, 10 p.m. 4.0 ppb (4) 0.8 ppb (1) 3.1 ppb (3) 2.0 ppb (2) N/A 1.0 ppb (1) 52.0 ppb (40) 0.37 ppb (4) 19.0 μg/m3 (17) 0.0 μg/m3 (0) 40.0
 
March 16, 2019, 9 p.m. 6.0 ppb (6) 1.7 ppb (2) 5.1 ppb (5) 3.0 ppb (3) N/A 1.0 ppb (1) 49.0 ppb (38) 0.38 ppb (4) 8.0 μg/m3 (7) 5.0 μg/m3 (21) 38.0
 
March 16, 2019, 8 p.m. 9.0 ppb (8) 3.3 ppb (3) 8.2 ppb (8) 5.0 ppb (5) N/A 1.0 ppb (1) 46.0 ppb (35) 0.39 ppb (4) 16.0 μg/m3 (15) 5.0 μg/m3 (21) 35.0
 
March 16, 2019, 7 p.m. 8.4 ppb (8) 3.0 ppb (3) 7.4 ppb (7) 4.0 ppb (4) N/A 1.0 ppb (1) 45.0 ppb (35) 0.33 ppb (4) 35.0 μg/m3 (32) 17.0 μg/m3 (61) 61.0
 
March 16, 2019, 6 p.m. 11.2 ppb (10) 3.5 ppb (3) 9.6 ppb (9) 6.0 ppb (6) N/A 1.0 ppb (1) 42.0 ppb (32) 0.27 ppb (3) 18.0 μg/m3 (16) 6.0 μg/m3 (25) 32.0
 
March 16, 2019, 5 p.m. 9.8 ppb (9) 2.0 ppb (2) 7.3 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 41.0 ppb (32) 0.22 ppb (2) 9.0 μg/m3 (8) 2.0 μg/m3 (8) 32.0
 
March 16, 2019, 4 p.m. 3.1 ppb (3) 0.2 ppb (0) 1.4 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) 0.17 ppb (2) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 35.0
 
March 16, 2019, 3 p.m. 2.5 ppb (2) -0.4 ppb (0) 0.4 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) 0.14 ppb (2) 5.0 μg/m3 (5) 5.0 μg/m3 (21) 35.0
 
March 16, 2019, 2 p.m. 2.3 ppb (2) 0.1 ppb (0) 0.8 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) 0.14 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 35.0
 
March 16, 2019, 1 p.m. 3.5 ppb (3) -0.1 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) 0.14 ppb (2) 3.0 μg/m3 (3) 0.0 μg/m3 (0) 34.0
 
March 16, 2019, noon 13.8 ppb (13) -0.1 ppb (0) 10.7 ppb (10) 11.0 ppb (10) N/A 0.0 ppb (0) 28.0 ppb (22) 0.2 ppb (2) 4.0 μg/m3 (4) 2.0 μg/m3 (8) 22.0
 
March 16, 2019, 11 a.m. 6.1 ppb (6) 0.1 ppb (0) 3.8 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (28) 0.16 ppb (2) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 28.0
 
March 16, 2019, 10 a.m. 9.6 ppb (9) 0.2 ppb (0) 6.0 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 36.0 ppb (28) 0.18 ppb (2) 11.0 μg/m3 (10) 0.0 μg/m3 (0) 28.0
 
March 16, 2019, 9 a.m. 11.6 ppb (11) -0.2 ppb (0) 9.0 ppb (8) 9.0 ppb (8) N/A 0.0 ppb (0) 32.0 ppb (25) 0.25 ppb (3) 8.0 μg/m3 (7) 2.0 μg/m3 (8) 25.0
 
March 16, 2019, 8 a.m. 9.4 ppb (9) -0.3 ppb (0) 8.0 ppb (7) 8.0 ppb (7) N/A 0.0 ppb (0) 33.0 ppb (25) 0.26 ppb (3) 15.0 μg/m3 (14) 4.0 μg/m3 (17) 25.0
 
March 16, 2019, 7 a.m. 7.7 ppb (7) -0.2 ppb (0) 5.7 ppb (5) 6.0 ppb (6) N/A 0.0 ppb (0) 39.0 ppb (30) 0.24 ppb (3) 13.0 μg/m3 (12) 2.0 μg/m3 (8) 30.0
 
March 16, 2019, 6 a.m. 3.1 ppb (3) -0.5 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) 0.24 ppb (3) 3.0 μg/m3 (3) N/A 35.0
 
March 16, 2019, 5 a.m. 3.7 ppb (3) -0.7 ppb (0) 1.3 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) 0.27 ppb (3) -4.0 μg/m3 (0) N/A 35.0
 
March 16, 2019, 4 a.m. 3.5 ppb (3) -0.5 ppb (0) 1.4 ppb (1) 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) 0.3 ppb (3) -3.0 μg/m3 (0) 1.0 μg/m3 (4) 35.0
 
March 16, 2019, 3 a.m. 2.5 ppb (2) -0.1 ppb (0) 0.8 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 50.0 ppb (38) 0.33 ppb (4) 3.0 μg/m3 (3) 1.0 μg/m3 (4) 38.0
 
March 16, 2019, 2 a.m. 2.3 ppb (2) 0.3 ppb (0) 1.3 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 54.0 ppb (42) 0.32 ppb (4) 8.0 μg/m3 (7) 2.0 μg/m3 (8) 42.0
 
March 16, 2019, 1 a.m. 2.3 ppb (2) 0.0 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 56.0 ppb (43) 0.29 ppb (3) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 43.0
 
March 16, 2019, midnight 2.4 ppb (2) -0.3 ppb (0) 0.7 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 56.0 ppb (43) 0.27 ppb (3) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 43.0
 
March 15, 2019, 11 p.m. 4.0 ppb (4) 0.6 ppb (1) 2.7 ppb (3) 2.0 ppb (2) N/A 1.0 ppb (1) 54.0 ppb (42) 0.32 ppb (4) 8.0 μg/m3 (7) 2.0 μg/m3 (8) 42.0
 
March 15, 2019, 10 p.m. 3.5 ppb (3) 0.9 ppb (1) 2.3 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) 52.0 ppb (40) 0.35 ppb (4) 10.0 μg/m3 (9) 1.0 μg/m3 (4) 40.0
 
March 15, 2019, 9 p.m. 4.4 ppb (4) 1.4 ppb (1) 3.6 ppb (3) 2.0 ppb (2) N/A 1.0 ppb (1) 52.0 ppb (40) 0.35 ppb (4) 10.0 μg/m3 (9) 3.0 μg/m3 (12) 40.0
 
March 15, 2019, 8 p.m. 7.8 ppb (7) 2.9 ppb (3) 6.9 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (1) 48.0 ppb (37) 0.31 ppb (3) 19.0 μg/m3 (17) 2.0 μg/m3 (8) 37.0
 
March 15, 2019, 7 p.m. 25.1 ppb (23) 10.3 ppb (10) 22.4 ppb (21) 12.0 ppb (11) N/A 1.0 ppb (1) 40.0 ppb (31) 0.31 ppb (3) 38.0 μg/m3 (35) 21.0 μg/m3 (69) 69.0
 
March 15, 2019, 6 p.m. 6.2 ppb (6) 1.3 ppb (1) 3.5 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) 0.2 ppb (2) 12.0 μg/m3 (11) 6.0 μg/m3 (25) 34.0
 
March 15, 2019, 5 p.m. 13.5 ppb (12) 1.8 ppb (2) 7.1 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (28) 0.23 ppb (3) 11.0 μg/m3 (10) 7.0 μg/m3 (29) 29.0
 
March 15, 2019, 4 p.m. 12.2 ppb (11) 0.2 ppb (0) 5.4 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (28) 0.19 ppb (2) 9.0 μg/m3 (8) 4.0 μg/m3 (17) 28.0
 
March 15, 2019, 3 p.m. 5.9 ppb (5) -0.1 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (32) 0.15 ppb (2) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 32.0
 
March 15, 2019, 2 p.m. 2.9 ppb (3) 0.0 ppb (0) 1.8 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) 0.14 ppb (2) 3.0 μg/m3 (3) 1.0 μg/m3 (4) 35.0
 
March 15, 2019, 1 p.m. 2.7 ppb (3) 0.1 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) 0.13 ppb (1) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 35.0
 
March 15, 2019, noon 1.2 ppb (1) 0.1 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) 0.12 ppb (1) 8.0 μg/m3 (7) 5.0 μg/m3 (21) 35.0
 
March 15, 2019, 11 a.m. N/A -0.1 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A N/A N/A N/A 8.0 μg/m3 (7) 4.0 μg/m3 (17) 17.0
 
March 15, 2019, 10 a.m. 3.5 ppb (3) -0.1 ppb (0) 1.4 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) 0.13 ppb (1) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 34.0
 
March 15, 2019, 9 a.m. 2.3 ppb (2) 0.0 ppb (0) 0.5 ppb (0) 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) 0.16 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 35.0
 
March 15, 2019, 8 a.m. 2.0 ppb (2) -0.1 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (35) 0.16 ppb (2) 4.0 μg/m3 (4) 2.0 μg/m3 (8) 35.0
 
March 15, 2019, 7 a.m. 1.9 ppb (2) 0.1 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (36) 0.16 ppb (2) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 36.0
 
March 15, 2019, 6 a.m. 1.6 ppb (1) -0.1 ppb (0) 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (36) 0.16 ppb (2) 7.0 μg/m3 (6) 3.0 μg/m3 (12) 36.0
 
March 15, 2019, 5 a.m. 1.8 ppb (2) -0.2 ppb (0) 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (35) 0.17 ppb (2) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 35.0
 
March 15, 2019, 4 a.m. 1.6 ppb (1) -0.2 ppb (0) -0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (35) 0.18 ppb (2) 0.0 μg/m3 (0) 1.0 μg/m3 (4) 35.0
 
March 15, 2019, 3 a.m. 1.6 ppb (1) -0.3 ppb (0) -0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (35) 0.18 ppb (2) 1.0 μg/m3 (1) 1.0 μg/m3 (4) 35.0
 
March 15, 2019, 2 a.m. 1.7 ppb (2) 0.0 ppb (0) -0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (36) 0.2 ppb (2) 5.0 μg/m3 (5) 1.0 μg/m3 (4) 36.0
 
March 15, 2019, 1 a.m. 1.6 ppb (1) 0.1 ppb (0) 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 47.0 ppb (36) 0.2 ppb (2) 8.0 μg/m3 (7) 0.0 μg/m3 (0) 36.0
 
March 15, 2019, midnight 1.6 ppb (1) 0.0 ppb (0) 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 46.0 ppb (35) 0.19 ppb (2) 6.0 μg/m3 (5) -1.0 μg/m3 (0) 35.0
 
March 14, 2019, 11 p.m. 1.8 ppb (2) 0.2 ppb (0) 0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (35) 0.19 ppb (2) 3.0 μg/m3 (3) -1.0 μg/m3 (0) 35.0
 
March 14, 2019, 10 p.m. 1.6 ppb (1) 0.1 ppb (0) -0.1 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (35) 0.18 ppb (2) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 35.0
 
March 14, 2019, 9 p.m. 1.6 ppb (1) 0.1 ppb (0) -0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (35) 0.18 ppb (2) 8.0 μg/m3 (7) 1.0 μg/m3 (4) 35.0
 
March 14, 2019, 8 p.m. 1.7 ppb (2) -0.1 ppb (0) -0.2 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (35) 0.17 ppb (2) 12.0 μg/m3 (11) 2.0 μg/m3 (8) 35.0
 
March 14, 2019, 7 p.m. 1.8 ppb (2) 0.3 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 45.0 ppb (35) 0.17 ppb (2) 9.0 μg/m3 (8) 5.0 μg/m3 (21) 35.0
 
March 14, 2019, 6 p.m. 1.6 ppb (1) 0.0 ppb (0) -0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 44.0 ppb (34) 0.15 ppb (2) 10.0 μg/m3 (9) 9.0 μg/m3 (38) 38.0
 
March 14, 2019, 5 p.m. 1.5 ppb (1) 0.0 ppb (0) -0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 44.0 ppb (34) 0.14 ppb (2) 0.0 μg/m3 (0) 12.0 μg/m3 (50) 50.0
 
March 14, 2019, 4 p.m. 1.3 ppb (1) -0.1 ppb (0) -0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 45.0 ppb (35) 0.14 ppb (2) N/A 2.0 μg/m3 (8) 35.0
 
March 14, 2019, 3 p.m. 1.3 ppb (1) -0.2 ppb (0) -0.4 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) 45.0 ppb (35) 0.14 ppb (2) N/A 2.0 μg/m3 (8) 35.0
 
March 14, 2019, 2 p.m. 1.2 ppb (1) 0.0 ppb (0) -0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 46.0 ppb (35) 0.14 ppb (2) 1.0 μg/m3 (1) -1.0 μg/m3 (0) 35.0
 
March 14, 2019, 1 p.m. 1.2 ppb (1) -0.1 ppb (0) -0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 45.0 ppb (35) 0.14 ppb (2) 3.0 μg/m3 (3) -2.0 μg/m3 (0) 35.0
 
March 14, 2019, noon 1.2 ppb (1) 0.0 ppb (0) -0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 44.0 ppb (34) 0.13 ppb (1) 2.0 μg/m3 (2) 1.0 μg/m3 (4) 34.0
 
March 14, 2019, 11 a.m. 1.3 ppb (1) -0.1 ppb (0) -0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 45.0 ppb (35) 0.13 ppb (1) 1.0 μg/m3 (1) 4.0 μg/m3 (17) 35.0
 
March 14, 2019, 10 a.m. 1.4 ppb (1) -0.2 ppb (0) -0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 45.0 ppb (35) 0.13 ppb (1) 3.0 μg/m3 (3) 3.0 μg/m3 (12) 35.0
 
March 14, 2019, 9 a.m. 1.5 ppb (1) 0.0 ppb (0) -0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 44.0 ppb (34) 0.12 ppb (1) 7.0 μg/m3 (6) 3.0 μg/m3 (12) 34.0
 
March 14, 2019, 8 a.m. 1.4 ppb (1) -0.2 ppb (0) -0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 44.0 ppb (34) 0.11 ppb (1) 10.0 μg/m3 (9) 3.0 μg/m3 (12) 34.0
 
March 14, 2019, 7 a.m. 1.4 ppb (1) -0.1 ppb (0) -0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 44.0 ppb (34) 0.12 ppb (1) 2.0 μg/m3 (2) 2.0 μg/m3 (8) 34.0
 
March 14, 2019, 6 a.m. 1.1 ppb (1) 0.0 ppb (0) -0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 43.0 ppb (33) 0.12 ppb (1) 1.0 μg/m3 (1) 1.0 μg/m3 (4) 33.0
 
March 14, 2019, 5 a.m. 1.1 ppb (1) -0.1 ppb (0) -0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 43.0 ppb (33) 0.11 ppb (1) 0.0 μg/m3 (0) 4.0 μg/m3 (17) 33.0
 
March 14, 2019, 4 a.m. 1.4 ppb (1) 0.0 ppb (0) -0.2 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 45.0 ppb (35) 0.11 ppb (1) 0.0 μg/m3 (0) 3.0 μg/m3 (12) 35.0
 
March 14, 2019, 3 a.m. 1.4 ppb (1) 0.0 ppb (0) -0.2 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 45.0 ppb (35) 0.11 ppb (1) 0.0 μg/m3 (0) 1.0 μg/m3 (4) 35.0
 
March 14, 2019, 2 a.m. 1.2 ppb (1) -0.1 ppb (0) -0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 45.0 ppb (35) 0.11 ppb (1) 5.0 μg/m3 (5) N/A 35.0
 
March 14, 2019, 1 a.m. 1.1 ppb (1) -0.1 ppb (0) -0.6 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 45.0 ppb (35) 0.12 ppb (1) 11.0 μg/m3 (10) N/A 35.0
 
March 14, 2019, midnight 1.2 ppb (1) -0.1 ppb (0) -0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 47.0 ppb (36) 0.13 ppb (1) 15.0 μg/m3 (14) 0.0 μg/m3 (0) 36.0