AQSQID: 560210100

Site Name: Cheyenne

Location: Cheyenne, WY

Reporting: True, Located: True

Current AQI: 32.0

Cheyenne WY, US: 41.18222, -104.778336

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 24, 2019, 1 a.m. 2.7 ppb (3) 0.0 ppb (0) 2.0 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 41.0 ppb (32) 0.2 ppb (2) 14.0 μg/m3 (13) 0.0 μg/m3 (0) 32.0
 
May 24, 2019, midnight 2.1 ppb (2) 0.2 ppb (0) 1.4 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 41.0 ppb (32) 0.2 ppb (2) 17.0 μg/m3 (15) 2.0 μg/m3 (8) 32.0
 
May 23, 2019, 11 p.m. 1.9 ppb (2) 0.2 ppb (0) 1.4 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 41.0 ppb (32) 0.2 ppb (2) 18.0 μg/m3 (16) 1.0 μg/m3 (4) 32.0
 
May 23, 2019, 10 p.m. 2.5 ppb (2) 0.1 ppb (0) 2.2 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) 0.2 ppb (2) 14.0 μg/m3 (13) 0.0 μg/m3 (0) 30.0
 
May 23, 2019, 9 p.m. 2.5 ppb (2) 0.4 ppb (0) 2.2 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 40.0 ppb (31) 0.19 ppb (2) 14.0 μg/m3 (13) 5.0 μg/m3 (21) 31.0
 
May 23, 2019, 8 p.m. 1.9 ppb (2) 0.2 ppb (0) 1.5 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 41.0 ppb (32) 0.19 ppb (2) 27.0 μg/m3 (25) 8.0 μg/m3 (33) 33.0
 
May 23, 2019, 7 p.m. 2.1 ppb (2) 0.3 ppb (0) 1.5 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 41.0 ppb (32) 0.17 ppb (2) 11.0 μg/m3 (10) 9.0 μg/m3 (38) 38.0
 
May 23, 2019, 6 p.m. 2.6 ppb (2) 0.3 ppb (0) 2.1 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 42.0 ppb (32) 0.17 ppb (2) 10.0 μg/m3 (9) 9.0 μg/m3 (38) 38.0
 
May 23, 2019, 5 p.m. 2.3 ppb (2) 0.3 ppb (0) 1.7 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) 41.0 ppb (32) 0.16 ppb (2) 20.0 μg/m3 (18) 3.0 μg/m3 (12) 32.0
 
May 23, 2019, 4 p.m. 3.5 ppb (3) 0.2 ppb (0) 3.0 ppb (3) 3.0 ppb (3) N/A 1.0 ppb (1) 38.0 ppb (29) 0.15 ppb (2) 5.0 μg/m3 (5) -1.0 μg/m3 (0) 29.0
 
May 23, 2019, 3 p.m. 2.5 ppb (2) 0.1 ppb (0) 1.8 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 33.0 ppb (25) 0.15 ppb (2) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 25.0
 
May 23, 2019, 2 p.m. 1.5 ppb (1) -0.1 ppb (0) 0.6 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 31.0 ppb (24) 0.13 ppb (1) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 24.0
 
May 23, 2019, 1 p.m. 1.2 ppb (1) 0.1 ppb (0) 0.6 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 32.0 ppb (25) 0.11 ppb (1) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 25.0
 
May 23, 2019, noon 0.0 ppb (0) 0.4 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 25.0 ppb (19) 0.12 ppb (1) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 19.0
 
May 23, 2019, 11 a.m. N/A 0.2 ppb (0) 1.5 ppb (1) 1.0 ppb (1) N/A N/A N/A N/A 7.0 μg/m3 (6) 5.0 μg/m3 (21) 21.0
 
May 23, 2019, 10 a.m. 1.5 ppb (1) 0.1 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 33.0 ppb (25) 0.12 ppb (1) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 25.0
 
May 23, 2019, 9 a.m. 1.5 ppb (1) -0.2 ppb (0) 0.6 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) 0.2 ppb (2) 4.0 μg/m3 (4) 4.0 μg/m3 (17) 26.0
 
May 23, 2019, 8 a.m. 1.4 ppb (1) -0.3 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 35.0 ppb (27) 0.2 ppb (2) -1.0 μg/m3 (0) 6.0 μg/m3 (25) 27.0
 
May 23, 2019, 7 a.m. 1.1 ppb (1) -0.3 ppb (0) 0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 35.0 ppb (27) 0.2 ppb (2) N/A N/A 27.0
 
May 23, 2019, 6 a.m. 1.2 ppb (1) -0.2 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 38.0 ppb (29) 0.21 ppb (2) N/A N/A 29.0
 
May 23, 2019, 5 a.m. 1.1 ppb (1) -0.2 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 38.0 ppb (29) 0.23 ppb (3) N/A -2.0 μg/m3 (0) 29.0
 
May 23, 2019, 4 a.m. 1.1 ppb (1) -0.3 ppb (0) 0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 40.0 ppb (31) 0.23 ppb (3) 4.0 μg/m3 (4) -2.0 μg/m3 (0) 31.0
 
May 23, 2019, 3 a.m. 1.1 ppb (1) -0.2 ppb (0) 0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 42.0 ppb (32) 0.24 ppb (3) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 32.0
 
May 23, 2019, 2 a.m. 1.2 ppb (1) -0.1 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 43.0 ppb (33) 0.25 ppb (3) 3.0 μg/m3 (3) 3.0 μg/m3 (12) 33.0
 
May 23, 2019, 1 a.m. 1.2 ppb (1) 0.1 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 2.0 ppb (3) 44.0 ppb (34) 0.27 ppb (3) 6.0 μg/m3 (5) 0.0 μg/m3 (0) 34.0
 
May 23, 2019, midnight 1.3 ppb (1) 0.4 ppb (0) 0.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (3) 43.0 ppb (33) 0.27 ppb (3) 8.0 μg/m3 (7) -1.0 μg/m3 (0) 33.0
 
May 22, 2019, 11 p.m. 1.3 ppb (1) 0.3 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 40.0 ppb (31) 0.25 ppb (3) 17.0 μg/m3 (15) 0.0 μg/m3 (0) 31.0
 
May 22, 2019, 10 p.m. 1.5 ppb (1) 0.4 ppb (0) 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 43.0 ppb (33) 0.23 ppb (3) 6.0 μg/m3 (5) 1.0 μg/m3 (4) 33.0
 
May 22, 2019, 9 p.m. 1.8 ppb (2) 0.4 ppb (0) 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 43.0 ppb (33) 0.21 ppb (2) 6.0 μg/m3 (5) 1.0 μg/m3 (4) 33.0
 
May 22, 2019, 8 p.m. 1.9 ppb (2) 0.4 ppb (0) 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 40.0 ppb (31) 0.19 ppb (2) 4.0 μg/m3 (4) -1.0 μg/m3 (0) 31.0
 
May 22, 2019, 7 p.m. 2.0 ppb (2) 0.4 ppb (0) 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 39.0 ppb (30) 0.18 ppb (2) 5.0 μg/m3 (5) -2.0 μg/m3 (0) 30.0
 
May 22, 2019, 6 p.m. 2.0 ppb (2) 0.6 ppb (1) 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 37.0 ppb (28) 0.17 ppb (2) 3.0 μg/m3 (3) -1.0 μg/m3 (0) 28.0
 
May 22, 2019, 5 p.m. 2.0 ppb (2) 0.5 ppb (0) 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 35.0 ppb (27) 0.15 ppb (2) 3.0 μg/m3 (3) 0.0 μg/m3 (0) 27.0
 
May 22, 2019, 4 p.m. 1.7 ppb (2) 0.3 ppb (0) 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 33.0 ppb (25) 0.14 ppb (2) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 25.0
 
May 22, 2019, 3 p.m. 1.8 ppb (2) 0.4 ppb (0) 0.8 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 31.0 ppb (24) 0.13 ppb (1) 6.0 μg/m3 (5) -1.0 μg/m3 (0) 24.0
 
May 22, 2019, 2 p.m. 1.4 ppb (1) 0.0 ppb (0) 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 31.0 ppb (24) 0.13 ppb (1) 2.0 μg/m3 (2) -2.0 μg/m3 (0) 24.0
 
May 22, 2019, 1 p.m. 1.8 ppb (2) 0.0 ppb (0) 0.8 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 31.0 ppb (24) 0.13 ppb (1) 4.0 μg/m3 (4) -1.0 μg/m3 (0) 24.0
 
May 22, 2019, noon 1.4 ppb (1) -0.1 ppb (0) 0.5 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 32.0 ppb (25) 0.13 ppb (1) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 25.0
 
May 22, 2019, 11 a.m. 1.5 ppb (1) -0.2 ppb (0) 0.5 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 32.0 ppb (25) 0.12 ppb (1) 2.0 μg/m3 (2) 1.0 μg/m3 (4) 25.0
 
May 22, 2019, 10 a.m. 1.4 ppb (1) -0.1 ppb (0) 0.4 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 33.0 ppb (25) 0.13 ppb (1) 5.0 μg/m3 (5) 0.0 μg/m3 (0) 25.0
 
May 22, 2019, 9 a.m. 1.3 ppb (1) -0.2 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 35.0 ppb (27) 0.16 ppb (2) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 27.0
 
May 22, 2019, 8 a.m. 1.1 ppb (1) -0.3 ppb (0) 0.0 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 35.0 ppb (27) 0.15 ppb (2) 1.0 μg/m3 (1) 1.0 μg/m3 (4) 27.0
 
May 22, 2019, 7 a.m. 1.3 ppb (1) 0.1 ppb (0) 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 35.0 ppb (27) 0.16 ppb (2) 0.0 μg/m3 (0) 2.0 μg/m3 (8) 27.0
 
May 22, 2019, 6 a.m. 1.2 ppb (1) -0.2 ppb (0) 0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 37.0 ppb (28) 0.15 ppb (2) 0.0 μg/m3 (0) 1.0 μg/m3 (4) 28.0
 
May 22, 2019, 5 a.m. 1.2 ppb (1) -0.3 ppb (0) 0.0 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 38.0 ppb (29) 0.16 ppb (2) -1.0 μg/m3 (0) -3.0 μg/m3 (0) 29.0
 
May 22, 2019, 4 a.m. 1.3 ppb (1) -0.2 ppb (0) 0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 37.0 ppb (28) 0.17 ppb (2) 0.0 μg/m3 (0) -1.0 μg/m3 (0) 28.0
 
May 22, 2019, 3 a.m. 1.4 ppb (1) -0.2 ppb (0) 0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 37.0 ppb (28) 0.17 ppb (2) 1.0 μg/m3 (1) 3.0 μg/m3 (12) 28.0
 
May 22, 2019, 2 a.m. 1.5 ppb (1) 0.1 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 38.0 ppb (29) 0.18 ppb (2) 2.0 μg/m3 (2) 4.0 μg/m3 (17) 29.0
 
May 22, 2019, 1 a.m. 1.8 ppb (2) -0.1 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 39.0 ppb (30) 0.18 ppb (2) 2.0 μg/m3 (2) 2.0 μg/m3 (8) 30.0
 
May 22, 2019, midnight 2.0 ppb (2) 0.0 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 40.0 ppb (31) 0.19 ppb (2) 0.0 μg/m3 (0) -2.0 μg/m3 (0) 31.0
 
May 21, 2019, 11 p.m. 2.2 ppb (2) 0.3 ppb (0) 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 39.0 ppb (30) 0.19 ppb (2) 2.0 μg/m3 (2) 0.0 μg/m3 (0) 30.0
 
May 21, 2019, 10 p.m. 2.2 ppb (2) 0.3 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 2.0 ppb (3) 37.0 ppb (28) 0.18 ppb (2) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 28.0
 
May 21, 2019, 9 p.m. 2.3 ppb (2) 0.3 ppb (0) 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 35.0 ppb (27) 0.17 ppb (2) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 27.0
 
May 21, 2019, 8 p.m. 2.6 ppb (2) 0.6 ppb (1) 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 33.0 ppb (25) 0.15 ppb (2) 4.0 μg/m3 (4) 2.0 μg/m3 (8) 25.0
 
May 21, 2019, 7 p.m. 2.6 ppb (2) 0.5 ppb (0) 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 30.0 ppb (23) 0.14 ppb (2) 2.0 μg/m3 (2) 4.0 μg/m3 (17) 23.0
 
May 21, 2019, 6 p.m. 2.2 ppb (2) 0.5 ppb (0) 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 28.0 ppb (22) 0.13 ppb (1) 2.0 μg/m3 (2) 4.0 μg/m3 (17) 22.0
 
May 21, 2019, 5 p.m. 1.9 ppb (2) 0.5 ppb (0) 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 26.0 ppb (20) 0.13 ppb (1) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 20.0
 
May 21, 2019, 4 p.m. 2.0 ppb (2) 0.4 ppb (0) 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 23.0 ppb (18) 0.13 ppb (1) 3.0 μg/m3 (3) 4.0 μg/m3 (17) 18.0
 
May 21, 2019, 3 p.m. 1.9 ppb (2) 0.2 ppb (0) 0.8 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 23.0 ppb (18) 0.12 ppb (1) 1.0 μg/m3 (1) 3.0 μg/m3 (12) 18.0
 
May 21, 2019, 2 p.m. 1.9 ppb (2) 0.0 ppb (0) 0.8 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 23.0 ppb (18) 0.12 ppb (1) 0.0 μg/m3 (0) 2.0 μg/m3 (8) 18.0
 
May 21, 2019, 1 p.m. 1.3 ppb (1) 0.0 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 22.0 ppb (17) 0.12 ppb (1) -4.0 μg/m3 (0) 4.0 μg/m3 (17) 17.0
 
May 21, 2019, noon 2.1 ppb (2) -0.2 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 21.0 ppb (16) 0.12 ppb (1) N/A -1.0 μg/m3 (0) 16.0
 
May 21, 2019, 11 a.m. 1.4 ppb (1) 0.0 ppb (0) 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 21.0 ppb (16) 0.12 ppb (1) -2.0 μg/m3 (0) 0.0 μg/m3 (0) 16.0
 
May 21, 2019, 10 a.m. 1.9 ppb (2) -0.1 ppb (0) 0.8 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 17.0 ppb (13) 0.12 ppb (1) 2.0 μg/m3 (2) 1.0 μg/m3 (4) 13.0
 
May 21, 2019, 9 a.m. 2.0 ppb (2) -0.2 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 16.0 ppb (12) 0.09 ppb (1) 3.0 μg/m3 (3) -1.0 μg/m3 (0) 12.0
 
May 21, 2019, 8 a.m. 2.1 ppb (2) 0.0 ppb (0) 1.2 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 14.0 ppb (11) 0.09 ppb (1) -4.0 μg/m3 (0) 0.0 μg/m3 (0) 11.0
 
May 21, 2019, 7 a.m. N/A -0.2 ppb (0) 1.4 ppb (1) 2.0 ppb (2) N/A N/A N/A N/A N/A -1.0 μg/m3 (0) 2.0
 
May 21, 2019, 6 a.m. 2.0 ppb (2) -0.1 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 15.0 ppb (12) 0.14 ppb (2) -3.0 μg/m3 (0) N/A 12.0
 
May 21, 2019, 5 a.m. 2.2 ppb (2) -0.2 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 15.0 ppb (12) 0.14 ppb (2) -1.0 μg/m3 (0) N/A 12.0
 
May 21, 2019, 4 a.m. 3.4 ppb (3) -0.1 ppb (0) 2.3 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 15.0 ppb (12) 0.15 ppb (2) 1.0 μg/m3 (1) N/A 12.0
 
May 21, 2019, 3 a.m. 3.2 ppb (3) 0.4 ppb (0) 2.2 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 17.0 ppb (13) 0.15 ppb (2) 0.0 μg/m3 (0) -2.0 μg/m3 (0) 13.0
 
May 21, 2019, 2 a.m. 2.3 ppb (2) 0.3 ppb (0) 1.5 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 19.0 ppb (15) 0.16 ppb (2) 3.0 μg/m3 (3) -1.0 μg/m3 (0) 15.0
 
May 21, 2019, 1 a.m. 2.0 ppb (2) 0.4 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 20.0 ppb (15) 0.15 ppb (2) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 15.0
 
May 21, 2019, midnight 2.9 ppb (3) 0.7 ppb (1) 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) 20.0 ppb (15) 0.16 ppb (2) 1.0 μg/m3 (1) 2.0 μg/m3 (8) 15.0
 
May 20, 2019, 11 p.m. 2.6 ppb (2) 0.6 ppb (1) 1.8 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) 20.0 ppb (15) 0.15 ppb (2) 2.0 μg/m3 (2) -2.0 μg/m3 (0) 15.0
 
May 20, 2019, 10 p.m. 2.4 ppb (2) 0.4 ppb (0) 1.4 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 20.0 ppb (15) 0.15 ppb (2) 5.0 μg/m3 (5) -2.0 μg/m3 (0) 15.0
 
May 20, 2019, 9 p.m. 2.0 ppb (2) 0.4 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 21.0 ppb (16) 0.14 ppb (2) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 16.0
 
May 20, 2019, 8 p.m. 2.2 ppb (2) 0.7 ppb (1) 1.5 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 22.0 ppb (17) 0.14 ppb (2) 7.0 μg/m3 (6) 6.0 μg/m3 (25) 25.0
 
May 20, 2019, 7 p.m. 2.1 ppb (2) 0.6 ppb (1) 1.3 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 23.0 ppb (18) 0.13 ppb (1) 12.0 μg/m3 (11) 2.0 μg/m3 (8) 18.0
 
May 20, 2019, 6 p.m. 2.5 ppb (2) 0.6 ppb (1) 1.6 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 24.0 ppb (18) 0.12 ppb (1) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 18.0
 
May 20, 2019, 5 p.m. 2.7 ppb (3) 0.3 ppb (0) 1.8 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) 25.0 ppb (19) 0.12 ppb (1) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 19.0
 
May 20, 2019, 4 p.m. 2.8 ppb (3) 0.1 ppb (0) 1.9 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 25.0 ppb (19) 0.13 ppb (1) 0.0 μg/m3 (0) 3.0 μg/m3 (12) 19.0
 
May 20, 2019, 3 p.m. 2.3 ppb (2) 0.1 ppb (0) 1.4 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 26.0 ppb (20) 0.12 ppb (1) 1.0 μg/m3 (1) -1.0 μg/m3 (0) 20.0
 
May 20, 2019, 2 p.m. 2.1 ppb (2) -0.1 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 26.0 ppb (20) 0.11 ppb (1) 5.0 μg/m3 (5) 4.0 μg/m3 (17) 20.0
 
May 20, 2019, 1 p.m. 1.8 ppb (2) 0.0 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 25.0 ppb (19) 0.1 ppb (1) 6.0 μg/m3 (5) 6.0 μg/m3 (25) 25.0
 
May 20, 2019, noon -0.1 ppb (0) 0.2 ppb (0) 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 24.0 ppb (18) 0.1 ppb (1) 8.0 μg/m3 (7) 0.0 μg/m3 (0) 18.0
 
May 20, 2019, 11 a.m. N/A -0.1 ppb (0) 1.6 ppb (1) 2.0 ppb (2) N/A N/A N/A N/A 5.0 μg/m3 (5) 0.0 μg/m3 (0) 5.0
 
May 20, 2019, 10 a.m. 2.1 ppb (2) -0.2 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 23.0 ppb (18) 0.11 ppb (1) 2.0 μg/m3 (2) 0.0 μg/m3 (0) 18.0
 
May 20, 2019, 9 a.m. 2.1 ppb (2) -0.3 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 23.0 ppb (18) 0.16 ppb (2) -3.0 μg/m3 (0) 2.0 μg/m3 (8) 18.0
 
May 20, 2019, 8 a.m. 2.5 ppb (2) -0.2 ppb (0) 1.5 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 24.0 ppb (18) 0.17 ppb (2) N/A -1.0 μg/m3 (0) 18.0
 
May 20, 2019, 7 a.m. 1.6 ppb (1) -0.1 ppb (0) 0.7 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 27.0 ppb (21) 0.17 ppb (2) N/A N/A 21.0
 
May 20, 2019, 6 a.m. 2.8 ppb (3) -0.3 ppb (0) 1.9 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 27.0 ppb (21) 0.17 ppb (2) N/A N/A 21.0
 
May 20, 2019, 5 a.m. 2.4 ppb (2) -0.4 ppb (0) 1.5 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 29.0 ppb (22) 0.18 ppb (2) -4.0 μg/m3 (0) 0.0 μg/m3 (0) 22.0
 
May 20, 2019, 4 a.m. 2.7 ppb (3) -0.6 ppb (0) 1.6 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 31.0 ppb (24) 0.2 ppb (2) 4.0 μg/m3 (4) -1.0 μg/m3 (0) 24.0
 
May 20, 2019, 3 a.m. 1.9 ppb (2) -0.3 ppb (0) 1.2 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) 0.23 ppb (3) 6.0 μg/m3 (5) -1.0 μg/m3 (0) 26.0
 
May 20, 2019, 2 a.m. 1.9 ppb (2) 0.1 ppb (0) 1.7 ppb (2) 2.0 ppb (2) N/A 2.0 ppb (3) 35.0 ppb (27) 0.24 ppb (3) 6.0 μg/m3 (5) -1.0 μg/m3 (0) 27.0
 
May 20, 2019, 1 a.m. 1.9 ppb (2) 0.2 ppb (0) 1.8 ppb (2) 2.0 ppb (2) N/A 2.0 ppb (3) 35.0 ppb (27) 0.25 ppb (3) 6.0 μg/m3 (5) -4.0 μg/m3 (0) 27.0
 
May 20, 2019, midnight 2.0 ppb (2) 0.5 ppb (0) 1.9 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (3) 33.0 ppb (25) 0.24 ppb (3) 7.0 μg/m3 (6) -1.0 μg/m3 (0) 25.0
 
May 19, 2019, 11 p.m. 2.2 ppb (2) 0.6 ppb (1) 2.1 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (3) 32.0 ppb (25) 0.22 ppb (2) 7.0 μg/m3 (6) 0.0 μg/m3 (0) 25.0
 
May 19, 2019, 10 p.m. 2.4 ppb (2) 0.7 ppb (1) 2.1 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (3) 30.0 ppb (23) 0.21 ppb (2) 7.0 μg/m3 (6) -2.0 μg/m3 (0) 23.0
 
May 19, 2019, 9 p.m. 1.8 ppb (2) 0.5 ppb (0) 1.5 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 29.0 ppb (22) 0.18 ppb (2) 22.0 μg/m3 (20) 1.0 μg/m3 (4) 22.0
 
May 19, 2019, 8 p.m. 1.7 ppb (2) 0.4 ppb (0) 1.1 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 28.0 ppb (22) 0.15 ppb (2) 6.0 μg/m3 (5) 7.0 μg/m3 (29) 29.0
 
May 19, 2019, 7 p.m. 1.4 ppb (1) 0.2 ppb (0) 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 28.0 ppb (22) 0.14 ppb (2) 2.0 μg/m3 (2) 12.0 μg/m3 (50) 50.0
 
May 19, 2019, 6 p.m. 1.4 ppb (1) 0.2 ppb (0) 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 29.0 ppb (22) 0.13 ppb (1) 7.0 μg/m3 (6) 3.0 μg/m3 (12) 22.0
 
May 19, 2019, 5 p.m. 1.3 ppb (1) 0.3 ppb (0) 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 28.0 ppb (22) 0.12 ppb (1) 14.0 μg/m3 (13) 2.0 μg/m3 (8) 22.0
 
May 19, 2019, 4 p.m. 1.3 ppb (1) 0.3 ppb (0) 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) 28.0 ppb (22) 0.11 ppb (1) 7.0 μg/m3 (6) 4.0 μg/m3 (17) 22.0
 
May 19, 2019, 3 p.m. 1.2 ppb (1) 0.0 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 28.0 ppb (22) 0.1 ppb (1) 3.0 μg/m3 (3) 4.0 μg/m3 (17) 22.0
 
May 19, 2019, 2 p.m. 1.3 ppb (1) -0.1 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 28.0 ppb (22) 0.09 ppb (1) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 22.0
 
May 19, 2019, 1 p.m. 1.1 ppb (1) -0.2 ppb (0) 0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 30.0 ppb (23) 0.1 ppb (1) 4.0 μg/m3 (4) 0.0 μg/m3 (0) 23.0
 
May 19, 2019, noon 1.0 ppb (1) -0.1 ppb (0) 0.0 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 31.0 ppb (24) 0.1 ppb (1) 2.0 μg/m3 (2) 5.0 μg/m3 (21) 24.0
 
May 19, 2019, 11 a.m. 1.0 ppb (1) -0.1 ppb (0) 0.0 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 30.0 ppb (23) 0.1 ppb (1) -4.0 μg/m3 (0) 10.0 μg/m3 (42) 42.0
 
May 19, 2019, 10 a.m. 1.1 ppb (1) -0.1 ppb (0) 0.0 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 31.0 ppb (24) 0.11 ppb (1) N/A 2.0 μg/m3 (8) 24.0
 
May 19, 2019, 9 a.m. 1.1 ppb (1) -0.3 ppb (0) -0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 30.0 ppb (23) 0.13 ppb (1) N/A 1.0 μg/m3 (4) 23.0
 
May 19, 2019, 8 a.m. 1.4 ppb (1) -0.2 ppb (0) 0.4 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 31.0 ppb (24) 0.14 ppb (2) N/A 1.0 μg/m3 (4) 24.0
 
May 19, 2019, 7 a.m. 1.4 ppb (1) -0.4 ppb (0) 0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 30.0 ppb (23) 0.15 ppb (2) -1.0 μg/m3 (0) 1.0 μg/m3 (4) 23.0
 
May 19, 2019, 6 a.m. 2.0 ppb (2) -0.4 ppb (0) 0.7 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 27.0 ppb (21) 0.17 ppb (2) N/A 0.0 μg/m3 (0) 21.0
 
May 19, 2019, 5 a.m. 1.8 ppb (2) -0.7 ppb (0) 0.3 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 26.0 ppb (20) 0.18 ppb (2) N/A N/A 20.0
 
May 19, 2019, 4 a.m. 1.5 ppb (1) -0.7 ppb (0) -0.1 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 27.0 ppb (21) 0.21 ppb (2) -1.0 μg/m3 (0) N/A 21.0
 
May 19, 2019, 3 a.m. 1.7 ppb (2) 0.0 ppb (0) 0.5 ppb (0) 0.0 ppb (0) N/A 2.0 ppb (3) 28.0 ppb (22) 0.26 ppb (3) 2.0 μg/m3 (2) 1.0 μg/m3 (4) 22.0
 
May 19, 2019, 2 a.m. 1.9 ppb (2) 0.4 ppb (0) 0.9 ppb (1) 1.0 ppb (1) N/A 2.0 ppb (3) 29.0 ppb (22) 0.28 ppb (3) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 22.0
 
May 19, 2019, 1 a.m. 1.7 ppb (2) 0.2 ppb (0) 0.7 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (3) 30.0 ppb (23) 0.27 ppb (3) 4.0 μg/m3 (4) -1.0 μg/m3 (0) 23.0
 
May 19, 2019, midnight 1.6 ppb (1) 0.1 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 2.0 ppb (3) 38.0 ppb (29) 0.26 ppb (3) 3.0 μg/m3 (3) -1.0 μg/m3 (0) 29.0
 
May 18, 2019, 11 p.m. 1.4 ppb (1) 0.0 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A 2.0 ppb (3) 45.0 ppb (35) 0.25 ppb (3) 4.0 μg/m3 (4) 2.0 μg/m3 (8) 35.0
 
May 18, 2019, 10 p.m. 1.4 ppb (1) 0.0 ppb (0) 0.1 ppb (0) 0.0 ppb (0) N/A 2.0 ppb (3) 44.0 ppb (34) 0.25 ppb (3) -1.0 μg/m3 (0) 0.0 μg/m3 (0) 34.0
 
May 18, 2019, 9 p.m. 1.3 ppb (1) 0.1 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A 2.0 ppb (3) 45.0 ppb (35) 0.22 ppb (2) 4.0 μg/m3 (4) -3.0 μg/m3 (0) 35.0
 
May 18, 2019, 8 p.m. 1.5 ppb (1) 0.5 ppb (0) 0.8 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (3) 44.0 ppb (34) 0.25 ppb (3) 8.0 μg/m3 (7) 1.0 μg/m3 (4) 34.0
 
May 18, 2019, 7 p.m. 1.5 ppb (1) 0.6 ppb (1) 0.8 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (3) 43.0 ppb (33) 0.21 ppb (2) 20.0 μg/m3 (18) 7.0 μg/m3 (29) 33.0
 
May 18, 2019, 6 p.m. 1.3 ppb (1) 0.4 ppb (0) 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 41.0 ppb (32) 0.16 ppb (2) 3.0 μg/m3 (3) 15.0 μg/m3 (56) 56.0
 
May 18, 2019, 5 p.m. 1.2 ppb (1) 0.2 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 38.0 ppb (29) 0.14 ppb (2) 0.0 μg/m3 (0) 0.0 μg/m3 (0) 29.0
 
May 18, 2019, 4 p.m. 1.3 ppb (1) 0.3 ppb (0) 0.5 ppb (0) 0.0 ppb (0) N/A 2.0 ppb (3) 38.0 ppb (29) 0.12 ppb (1) 5.0 μg/m3 (5) 1.0 μg/m3 (4) 29.0
 
May 18, 2019, 3 p.m. 1.3 ppb (1) 0.0 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 38.0 ppb (29) 0.11 ppb (1) 7.0 μg/m3 (6) 2.0 μg/m3 (8) 29.0
 
May 18, 2019, 2 p.m. 1.1 ppb (1) -0.1 ppb (0) 0.2 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 40.0 ppb (31) 0.11 ppb (1) 4.0 μg/m3 (4) 3.0 μg/m3 (12) 31.0
 
May 18, 2019, 1 p.m. 1.2 ppb (1) 0.0 ppb (0) 0.3 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 39.0 ppb (30) 0.11 ppb (1) 2.0 μg/m3 (2) 1.0 μg/m3 (4) 30.0
 
May 18, 2019, noon 1.1 ppb (1) -0.1 ppb (0) 0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 42.0 ppb (32) 0.11 ppb (1) 5.0 μg/m3 (5) -3.0 μg/m3 (0) 32.0
 
May 18, 2019, 11 a.m. 0.9 ppb (1) -0.1 ppb (0) 0.1 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 45.0 ppb (35) 0.1 ppb (1) 5.0 μg/m3 (5) 0.0 μg/m3 (0) 35.0
 
May 18, 2019, 10 a.m. 1.6 ppb (1) -0.1 ppb (0) 0.7 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 46.0 ppb (35) 0.12 ppb (1) 4.0 μg/m3 (4) 1.0 μg/m3 (4) 35.0
 
May 18, 2019, 9 a.m. 1.5 ppb (1) -0.2 ppb (0) 0.5 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 45.0 ppb (35) 0.12 ppb (1) -2.0 μg/m3 (0) -1.0 μg/m3 (0) 35.0
 
May 18, 2019, 8 a.m. 2.8 ppb (3) -0.1 ppb (0) 1.9 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) 0.13 ppb (1) N/A 0.0 μg/m3 (0) 30.0
 
May 18, 2019, 7 a.m. 1.5 ppb (1) -0.2 ppb (0) 0.5 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 44.0 ppb (34) 0.13 ppb (1) 16.0 μg/m3 (15) -1.0 μg/m3 (0) 34.0
 
May 18, 2019, 6 a.m. 1.4 ppb (1) 0.0 ppb (0) 0.5 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 46.0 ppb (35) 0.13 ppb (1) -4.0 μg/m3 (0) -1.0 μg/m3 (0) 35.0
 
May 18, 2019, 5 a.m. 1.4 ppb (1) -0.1 ppb (0) 0.4 ppb (0) 0.0 ppb (0) N/A 1.0 ppb (1) 46.0 ppb (35) 0.13 ppb (1) 19.0 μg/m3 (17) 0.0 μg/m3 (0) 35.0
 
May 18, 2019, 4 a.m. 1.7 ppb (2) -0.1 ppb (0) 0.8 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 43.0 ppb (33) 0.14 ppb (2) -2.0 μg/m3 (0) -2.0 μg/m3 (0) 33.0
 
May 18, 2019, 3 a.m. 2.1 ppb (2) -0.2 ppb (0) 1.0 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 45.0 ppb (35) 0.14 ppb (2) 22.0 μg/m3 (20) -1.0 μg/m3 (0) 35.0
 
May 18, 2019, 2 a.m. 1.5 ppb (1) -0.3 ppb (0) 0.3 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 49.0 ppb (38) 0.14 ppb (2) -4.0 μg/m3 (0) -3.0 μg/m3 (0) 38.0
 
May 18, 2019, 1 a.m. 1.7 ppb (2) -0.5 ppb (0) 0.2 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 48.0 ppb (37) 0.15 ppb (2) 3.0 μg/m3 (3) -4.0 μg/m3 (0) 37.0
 
May 18, 2019, midnight 1.5 ppb (1) -0.7 ppb (0) -0.2 ppb (0) 1.0 ppb (1) N/A 1.0 ppb (1) 49.0 ppb (38) 0.17 ppb (2) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 38.0
 
May 17, 2019, 11 p.m. 1.5 ppb (1) -0.5 ppb (0) 0.0 ppb (0) 0.0 ppb (0) N/A 2.0 ppb (3) 46.0 ppb (35) 0.2 ppb (2) 1.0 μg/m3 (1) 2.0 μg/m3 (8) 35.0
 
May 17, 2019, 10 p.m. 1.8 ppb (2) 0.0 ppb (0) 0.8 ppb (1) 1.0 ppb (1) N/A 2.0 ppb (3) 41.0 ppb (32) 0.24 ppb (3) 3.0 μg/m3 (3) 0.0 μg/m3 (0) 32.0
 
May 17, 2019, 9 p.m. 1.9 ppb (2) 0.2 ppb (0) 1.4 ppb (1) 1.0 ppb (1) N/A 2.0 ppb (3) 32.0 ppb (25) 0.25 ppb (3) 4.0 μg/m3 (4) N/A 25.0
 
May 17, 2019, 8 p.m. 2.0 ppb (2) 0.6 ppb (1) 1.7 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (3) 34.0 ppb (26) 0.23 ppb (3) 15.0 μg/m3 (14) N/A 26.0
 
May 17, 2019, 7 p.m. 2.1 ppb (2) 0.9 ppb (1) 2.0 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (3) 35.0 ppb (27) 0.19 ppb (2) 11.0 μg/m3 (10) N/A 27.0
 
May 17, 2019, 6 p.m. 1.9 ppb (2) 0.0 ppb (0) 1.4 ppb (1) 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) 0.14 ppb (2) 15.0 μg/m3 (14) 3.0 μg/m3 (12) 26.0
 
May 17, 2019, 5 p.m. 1.8 ppb (2) -0.3 ppb (0) 1.4 ppb (1) 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) 0.14 ppb (2) 11.0 μg/m3 (10) 4.0 μg/m3 (17) 28.0
 
May 17, 2019, 4 p.m. 2.0 ppb (2) -0.3 ppb (0) 1.7 ppb (2) 2.0 ppb (2) N/A 2.0 ppb (3) 34.0 ppb (26) 0.16 ppb (2) 12.0 μg/m3 (11) 5.0 μg/m3 (21) 26.0
 
May 17, 2019, 3 p.m. 2.3 ppb (2) 0.0 ppb (0) 2.3 ppb (2) 2.0 ppb (2) N/A 2.0 ppb (3) 32.0 ppb (25) 0.2 ppb (2) 18.0 μg/m3 (16) 5.0 μg/m3 (21) 25.0
 
May 17, 2019, 2 p.m. 2.2 ppb (2) 0.1 ppb (0) 2.4 ppb (2) 2.0 ppb (2) N/A 2.0 ppb (3) 32.0 ppb (25) 0.19 ppb (2) 19.0 μg/m3 (17) 6.0 μg/m3 (25) 25.0
 
May 17, 2019, 1 p.m. 2.0 ppb (2) 0.0 ppb (0) 2.5 ppb (2) 2.0 ppb (2) N/A 2.0 ppb (3) 32.0 ppb (25) 0.19 ppb (2) 18.0 μg/m3 (16) 7.0 μg/m3 (29) 29.0
 
May 17, 2019, noon 2.4 ppb (2) 0.2 ppb (0) 2.8 ppb (3) 3.0 ppb (3) N/A 3.0 ppb (4) 31.0 ppb (24) 0.18 ppb (2) 17.0 μg/m3 (15) 6.0 μg/m3 (25) 25.0
 
May 17, 2019, 11 a.m. 3.4 ppb (3) 0.2 ppb (0) 3.2 ppb (3) 3.0 ppb (3) N/A 2.0 ppb (3) 34.0 ppb (26) 0.15 ppb (2) 10.0 μg/m3 (9) 1.0 μg/m3 (4) 26.0
 
May 17, 2019, 10 a.m. 3.8 ppb (4) 0.4 ppb (0) 3.5 ppb (3) 3.0 ppb (3) N/A 2.0 ppb (3) 37.0 ppb (28) 0.16 ppb (2) 13.0 μg/m3 (12) 5.0 μg/m3 (21) 28.0
 
May 17, 2019, 9 a.m. 3.8 ppb (4) 0.3 ppb (0) 3.6 ppb (3) 3.0 ppb (3) N/A 2.0 ppb (3) 37.0 ppb (28) 0.14 ppb (2) 16.0 μg/m3 (15) 9.0 μg/m3 (38) 38.0
 
May 17, 2019, 8 a.m. 5.9 ppb (5) -0.2 ppb (0) 5.8 ppb (5) 6.0 ppb (6) N/A 1.0 ppb (1) 38.0 ppb (29) 0.12 ppb (1) 14.0 μg/m3 (13) 11.0 μg/m3 (46) 46.0
 
May 17, 2019, 7 a.m. 4.9 ppb (5) 0.0 ppb (0) 4.9 ppb (5) 5.0 ppb (5) N/A 1.0 ppb (1) 41.0 ppb (32) 0.12 ppb (1) 17.0 μg/m3 (15) 15.0 μg/m3 (56) 56.0
 
May 17, 2019, 6 a.m. 4.3 ppb (4) -0.3 ppb (0) 3.6 ppb (3) 4.0 ppb (4) N/A 1.0 ppb (1) 43.0 ppb (33) 0.11 ppb (1) 15.0 μg/m3 (14) -4.0 μg/m3 (0) 33.0
 
May 17, 2019, 5 a.m. 4.8 ppb (4) -0.9 ppb (0) 4.6 ppb (4) 6.0 ppb (6) N/A 1.0 ppb (1) 46.0 ppb (35) 0.15 ppb (2) 18.0 μg/m3 (16) -4.0 μg/m3 (0) 35.0
 
May 17, 2019, 4 a.m. 3.3 ppb (3) -0.4 ppb (0) 2.5 ppb (2) 3.0 ppb (3) N/A 1.0 ppb (1) 55.0 ppb (42) 0.16 ppb (2) 17.0 μg/m3 (15) 2.0 μg/m3 (8) 42.0
 
May 17, 2019, 3 a.m. 3.9 ppb (4) 0.0 ppb (0) 3.3 ppb (3) 3.0 ppb (3) N/A 2.0 ppb (3) 61.0 ppb (47) 0.2 ppb (2) 18.0 μg/m3 (16) 3.0 μg/m3 (12) 47.0
 
May 17, 2019, 2 a.m. 3.2 ppb (3) 0.1 ppb (0) 2.5 ppb (2) 2.0 ppb (2) N/A 2.0 ppb (3) 62.0 ppb (48) 0.19 ppb (2) 17.0 μg/m3 (15) 3.0 μg/m3 (12) 48.0