AQSQID: 371830014

Site Name: Millbrook Ncore

Location: Raleigh, NC

Reporting: True, Located: True

Current AQI: 34.0

Raleigh NC, US: 35.856098, -78.574203

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 23, 2019, 1 p.m. 3.3 ppb (3) 0.9 ppb (1) 3.7 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) 0.17 ppb (2) 5.0 μg/m3 (5) 8.0 μg/m3 (33) 34.0
 
March 23, 2019, noon 5.8 ppb (5) 1.1 ppb (1) 6.2 ppb (6) 5.0 ppb (5) N/A 0.0 ppb (0) 40.0 ppb (31) 0.19 ppb (2) 5.0 μg/m3 (5) 7.0 μg/m3 (29) 31.0
 
March 23, 2019, 11 a.m. 8.0 ppb (7) 0.6 ppb (1) 7.8 ppb (7) 7.0 ppb (6) N/A 0.0 ppb (0) 36.0 ppb (28) 0.2 ppb (2) 4.0 μg/m3 (4) 7.0 μg/m3 (29) 29.0
 
March 23, 2019, 10 a.m. 4.2 ppb (4) 0.3 ppb (0) 4.5 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (31) 0.17 ppb (2) 4.0 μg/m3 (4) 7.0 μg/m3 (29) 31.0
 
March 23, 2019, 9 a.m. 2.9 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (32) 0.17 ppb (2) 5.0 μg/m3 (5) 8.0 μg/m3 (33) 33.0
 
March 23, 2019, 8 a.m. 1.7 ppb (2) 0.2 ppb (0) 2.1 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) N/A 0.15 ppb (2) 5.0 μg/m3 (5) 6.0 μg/m3 (25) 25.0
 
March 23, 2019, 7 a.m. 1.3 ppb (1) 0.2 ppb (0) 1.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) 0.15 ppb (2) 6.0 μg/m3 (5) 7.0 μg/m3 (29) 35.0
 
March 23, 2019, 6 a.m. N/A N/A 1.4 ppb (1) N/A N/A N/A 46.0 ppb (35) 0.15 ppb (2) 7.0 μg/m3 (6) 9.0 μg/m3 (38) 38.0
 
March 23, 2019, 5 a.m. 1.2 ppb (1) 0.2 ppb (0) 1.7 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 7.0 μg/m3 (6) 10.0 μg/m3 (42) 42.0
 
March 23, 2019, 4 a.m. 1.2 ppb (1) 0.2 ppb (0) 1.7 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) 0.15 ppb (2) 7.0 μg/m3 (6) 6.0 μg/m3 (25) 36.0
 
March 23, 2019, 3 a.m. 1.3 ppb (1) 0.2 ppb (0) 1.8 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) 0.15 ppb (2) 8.0 μg/m3 (7) 5.0 μg/m3 (21) 37.0
 
March 23, 2019, 2 a.m. 1.8 ppb (2) 0.2 ppb (0) 2.5 ppb (2) 2.0 ppb (2) N/A 1.0 ppb (1) 48.0 ppb (37) 0.16 ppb (2) 9.0 μg/m3 (8) 8.0 μg/m3 (33) 37.0
 
March 23, 2019, 1 a.m. 1.9 ppb (2) 0.2 ppb (0) 2.6 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 49.0 ppb (38) 0.16 ppb (2) 11.0 μg/m3 (10) 10.0 μg/m3 (42) 42.0
 
March 23, 2019, midnight 1.9 ppb (2) 0.2 ppb (0) 2.5 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 49.0 ppb (38) 0.16 ppb (2) 7.0 μg/m3 (6) 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 11 p.m. 3.2 ppb (3) 0.2 ppb (0) 4.0 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 46.0 ppb (35) 0.17 ppb (2) 10.0 μg/m3 (9) 11.0 μg/m3 (46) 46.0
 
March 22, 2019, 10 p.m. 2.4 ppb (2) 0.3 ppb (0) 3.2 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 49.0 ppb (38) 0.17 ppb (2) 10.0 μg/m3 (9) 8.0 μg/m3 (33) 38.0
 
March 22, 2019, 9 p.m. 4.3 ppb (4) 1.0 ppb (1) 5.3 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) 0.19 ppb (2) 11.0 μg/m3 (10) 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 8 p.m. 5.4 ppb (5) 1.4 ppb (1) 4.7 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 50.0 ppb (38) 0.2 ppb (2) 9.0 μg/m3 (8) 6.0 μg/m3 (25) 38.0
 
March 22, 2019, 7 p.m. 4.3 ppb (4) 1.6 ppb (1) 4.1 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 51.0 ppb (39) 0.19 ppb (2) 9.0 μg/m3 (8) 9.0 μg/m3 (38) 39.0
 
March 22, 2019, 6 p.m. 2.5 ppb (2) 0.9 ppb (1) 3.5 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 50.0 ppb (38) 0.18 ppb (2) 5.0 μg/m3 (5) 8.0 μg/m3 (33) 38.0
 
March 22, 2019, 5 p.m. 1.8 ppb (2) 0.7 ppb (1) 2.8 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) 0.17 ppb (2) 7.0 μg/m3 (6) 9.0 μg/m3 (38) 38.0
 
March 22, 2019, 4 p.m. 2.4 ppb (2) 1.0 ppb (1) 3.0 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) 0.18 ppb (2) 8.0 μg/m3 (7) 12.0 μg/m3 (50) 50.0
 
March 22, 2019, 3 p.m. 2.0 ppb (2) 0.8 ppb (1) 3.1 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) 0.18 ppb (2) 7.0 μg/m3 (6) 11.0 μg/m3 (46) 46.0
 
March 22, 2019, 2 p.m. 3.4 ppb (3) 1.3 ppb (1) 4.2 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (30) 0.19 ppb (2) 8.0 μg/m3 (7) 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 1 p.m. 4.9 ppb (5) 1.6 ppb (1) 5.2 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (28) 0.2 ppb (2) 6.0 μg/m3 (5) 7.0 μg/m3 (29) 29.0
 
March 22, 2019, noon 8.8 ppb (8) 2.2 ppb (2) 8.8 ppb (8) 7.0 ppb (6) N/A 0.0 ppb (0) 31.0 ppb (24) 0.24 ppb (3) 4.0 μg/m3 (4) 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 11 a.m. 8.0 ppb (7) 1.6 ppb (1) 7.9 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 32.0 ppb (25) 0.24 ppb (3) 7.0 μg/m3 (6) 11.0 μg/m3 (46) 46.0
 
March 22, 2019, 10 a.m. 5.4 ppb (5) 0.9 ppb (1) 5.5 ppb (5) 5.0 ppb (5) N/A 0.0 ppb (0) 35.0 ppb (27) 0.21 ppb (2) 9.0 μg/m3 (8) 7.0 μg/m3 (29) 29.0
 
March 22, 2019, 9 a.m. 2.8 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (29) 0.19 ppb (2) 12.0 μg/m3 (11) 6.0 μg/m3 (25) 29.0
 
March 22, 2019, 8 a.m. 2.7 ppb (3) 0.2 ppb (0) 3.6 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.2 ppb (2) 10.0 μg/m3 (9) 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 7 a.m. 2.3 ppb (2) 0.3 ppb (0) 3.0 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (32) 0.2 ppb (2) 8.0 μg/m3 (7) 12.0 μg/m3 (50) 50.0
 
March 22, 2019, 6 a.m. N/A N/A 3.5 ppb (3) N/A N/A N/A 43.0 ppb (33) 0.19 ppb (2) 13.0 μg/m3 (12) 15.0 μg/m3 (56) 56.0
 
March 22, 2019, 5 a.m. 2.2 ppb (2) 0.2 ppb (0) 3.3 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 9.0 μg/m3 (8) 12.0 μg/m3 (50) 50.0
 
March 22, 2019, 4 a.m. 2.8 ppb (3) 0.2 ppb (0) 4.0 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) 0.22 ppb (2) 10.0 μg/m3 (9) 16.0 μg/m3 (59) 59.0
 
March 22, 2019, 3 a.m. 3.0 ppb (3) 0.2 ppb (0) 4.2 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) 0.22 ppb (2) 12.0 μg/m3 (11) 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 2 a.m. 6.2 ppb (6) 0.3 ppb (0) 7.2 ppb (7) 6.0 ppb (6) N/A 0.0 ppb (0) 39.0 ppb (30) 0.26 ppb (3) 13.0 μg/m3 (12) 11.0 μg/m3 (46) 46.0
 
March 22, 2019, 1 a.m. 15.8 ppb (15) 1.1 ppb (1) 14.7 ppb (14) 15.0 ppb (14) N/A 0.0 ppb (0) 31.0 ppb (24) 0.33 ppb (4) 17.0 μg/m3 (15) 16.0 μg/m3 (59) 59.0
 
March 22, 2019, midnight 13.9 ppb (13) 1.0 ppb (1) 15.1 ppb (14) 13.0 ppb (12) N/A 0.0 ppb (0) 32.0 ppb (25) 0.36 ppb (4) 20.0 μg/m3 (18) 15.0 μg/m3 (56) 56.0
 
March 21, 2019, 11 p.m. 11.0 ppb (10) 0.8 ppb (1) 12.5 ppb (12) 10.0 ppb (9) N/A 0.0 ppb (0) 39.0 ppb (30) 0.31 ppb (3) 14.0 μg/m3 (13) 12.0 μg/m3 (50) 50.0
 
March 21, 2019, 10 p.m. 3.6 ppb (3) 0.3 ppb (0) 5.1 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 52.0 ppb (40) 0.22 ppb (2) 12.0 μg/m3 (11) 11.0 μg/m3 (46) 46.0
 
March 21, 2019, 9 p.m. 2.4 ppb (2) 0.5 ppb (0) 3.4 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 55.0 ppb (42) 0.2 ppb (2) 10.0 μg/m3 (9) 9.0 μg/m3 (38) 42.0
 
March 21, 2019, 8 p.m. 2.4 ppb (2) 0.7 ppb (1) 3.2 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 56.0 ppb (43) 0.2 ppb (2) 6.0 μg/m3 (5) 7.0 μg/m3 (29) 43.0
 
March 21, 2019, 7 p.m. 2.6 ppb (2) 1.1 ppb (1) 3.3 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 53.0 ppb (41) 0.22 ppb (2) 6.0 μg/m3 (5) 8.0 μg/m3 (33) 41.0
 
March 21, 2019, 6 p.m. 1.8 ppb (2) 0.6 ppb (1) 2.1 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 53.0 ppb (41) 0.17 ppb (2) 5.0 μg/m3 (5) N/A 41.0
 
March 21, 2019, 5 p.m. 2.0 ppb (2) 0.5 ppb (0) 2.1 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A N/A N/A 35.0
 
March 21, 2019, 4 p.m. 2.9 ppb (3) 0.7 ppb (1) 3.1 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A N/A 32.0
 
March 21, 2019, 3 p.m. 3.3 ppb (3) 0.7 ppb (1) 3.4 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (30) 0.2 ppb (2) N/A N/A 30.0
 
March 21, 2019, 2 p.m. 3.8 ppb (4) 0.4 ppb (0) 3.8 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) 0.19 ppb (2) N/A N/A 28.0
 
March 21, 2019, 1 p.m. 5.4 ppb (5) 1.1 ppb (1) 4.7 ppb (4) 4.0 ppb (4) N/A 0.0 ppb (0) 36.0 ppb (28) 0.2 ppb (2) 6.0 μg/m3 (5) 4.0 μg/m3 (17) 28.0
 
March 21, 2019, noon 3.7 ppb (3) 0.5 ppb (0) 3.6 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) 0.19 ppb (2) 3.0 μg/m3 (3) 5.0 μg/m3 (21) 28.0
 
March 21, 2019, 11 a.m. 3.3 ppb (3) 0.2 ppb (0) 3.3 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (28) 0.19 ppb (2) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 28.0
 
March 21, 2019, 10 a.m. 3.2 ppb (3) 0.2 ppb (0) 3.4 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (27) 0.18 ppb (2) 4.0 μg/m3 (4) 6.0 μg/m3 (25) 27.0
 
March 21, 2019, 9 a.m. 3.1 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (27) 0.17 ppb (2) 5.0 μg/m3 (5) 6.0 μg/m3 (25) 27.0
 
March 21, 2019, 8 a.m. 2.4 ppb (2) 0.3 ppb (0) 2.9 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) N/A 0.18 ppb (2) 5.0 μg/m3 (5) 7.0 μg/m3 (29) 29.0
 
March 21, 2019, 7 a.m. 2.3 ppb (2) 0.6 ppb (1) 2.3 ppb (2) 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) 0.17 ppb (2) 4.0 μg/m3 (4) 6.0 μg/m3 (25) 29.0
 
March 21, 2019, 6 a.m. N/A N/A 2.0 ppb (2) N/A N/A N/A 39.0 ppb (30) 0.16 ppb (2) 6.0 μg/m3 (5) 6.0 μg/m3 (25) 30.0
 
March 21, 2019, 5 a.m. 1.4 ppb (1) 0.3 ppb (0) 1.7 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 7.0 μg/m3 (6) 7.0 μg/m3 (29) 32.0
 
March 21, 2019, 4 a.m. 1.3 ppb (1) 0.4 ppb (0) 1.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) 0.16 ppb (2) 7.0 μg/m3 (6) 10.0 μg/m3 (42) 42.0
 
March 21, 2019, 3 a.m. 1.3 ppb (1) 0.4 ppb (0) 1.6 ppb (1) 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) 0.16 ppb (2) 7.0 μg/m3 (6) 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 2 a.m. 1.6 ppb (1) 0.4 ppb (0) 1.9 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) 0.17 ppb (2) 11.0 μg/m3 (10) 11.0 μg/m3 (46) 46.0
 
March 21, 2019, 1 a.m. 2.7 ppb (3) 0.4 ppb (0) 3.2 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) 0.18 ppb (2) 12.0 μg/m3 (11) 11.0 μg/m3 (46) 46.0
 
March 21, 2019, midnight 3.3 ppb (3) 0.4 ppb (0) 4.1 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) 0.19 ppb (2) 12.0 μg/m3 (11) 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 11 p.m. 3.4 ppb (3) 0.4 ppb (0) 4.4 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) 0.2 ppb (2) 16.0 μg/m3 (15) 13.0 μg/m3 (52) 52.0
 
March 20, 2019, 10 p.m. 2.9 ppb (3) 0.5 ppb (0) 4.0 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) 0.19 ppb (2) 12.0 μg/m3 (11) 13.0 μg/m3 (52) 52.0
 
March 20, 2019, 9 p.m. 3.7 ppb (3) 0.9 ppb (1) 4.0 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 46.0 ppb (35) 0.23 ppb (3) 13.0 μg/m3 (12) 14.0 μg/m3 (54) 54.0
 
March 20, 2019, 8 p.m. 2.8 ppb (3) 0.7 ppb (1) 3.8 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (37) 0.21 ppb (2) 13.0 μg/m3 (12) 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 7 p.m. 2.4 ppb (2) 0.7 ppb (1) 3.4 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (37) 0.2 ppb (2) 18.0 μg/m3 (16) 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 6 p.m. 2.2 ppb (2) 0.6 ppb (1) 3.4 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (37) 0.18 ppb (2) 15.0 μg/m3 (14) 15.0 μg/m3 (56) 56.0
 
March 20, 2019, 5 p.m. 2.2 ppb (2) 0.7 ppb (1) 3.4 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (37) 0.18 ppb (2) 16.0 μg/m3 (15) 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 4 p.m. 3.0 ppb (3) 0.7 ppb (1) 4.6 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) 0.18 ppb (2) 16.0 μg/m3 (15) 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 3 p.m. 3.3 ppb (3) 0.8 ppb (1) 4.8 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) 0.18 ppb (2) 15.0 μg/m3 (14) 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 2 p.m. 4.3 ppb (4) 0.9 ppb (1) 5.7 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) 0.19 ppb (2) 16.0 μg/m3 (15) 15.0 μg/m3 (56) 56.0
 
March 20, 2019, 1 p.m. 4.5 ppb (4) 0.9 ppb (1) 6.0 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 42.0 ppb (32) 0.19 ppb (2) 12.0 μg/m3 (11) 13.0 μg/m3 (52) 52.0
 
March 20, 2019, noon 4.8 ppb (4) 0.8 ppb (1) 6.5 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 41.0 ppb (32) 0.24 ppb (3) 17.0 μg/m3 (15) 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 11 a.m. 4.7 ppb (4) 0.5 ppb (0) 6.3 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 41.0 ppb (32) 0.2 ppb (2) 10.0 μg/m3 (9) 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 10 a.m. 5.8 ppb (5) 0.8 ppb (1) 7.3 ppb (7) 5.0 ppb (5) N/A 0.0 ppb (0) 38.0 ppb (29) 0.18 ppb (2) 13.0 μg/m3 (12) 13.0 μg/m3 (52) 52.0
 
March 20, 2019, 9 a.m. 4.5 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 38.0 ppb (29) 0.17 ppb (2) 9.0 μg/m3 (8) 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 8 a.m. 3.3 ppb (3) 0.3 ppb (0) 4.8 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.18 ppb (2) 12.0 μg/m3 (11) 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 7 a.m. 4.4 ppb (4) 0.7 ppb (1) 6.3 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 39.0 ppb (30) 0.2 ppb (2) 11.0 μg/m3 (10) 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 6 a.m. N/A N/A 4.5 ppb (4) N/A N/A N/A 41.0 ppb (32) 0.17 ppb (2) 11.0 μg/m3 (10) 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 5 a.m. 2.3 ppb (2) 0.4 ppb (0) 3.2 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 13.0 μg/m3 (12) 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 4 a.m. 3.3 ppb (3) 0.4 ppb (0) 4.2 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (32) 0.19 ppb (2) 14.0 μg/m3 (13) 13.0 μg/m3 (52) 52.0
 
March 20, 2019, 3 a.m. 7.9 ppb (7) 0.6 ppb (1) 8.8 ppb (8) 7.0 ppb (6) N/A 1.0 ppb (1) 36.0 ppb (28) 0.25 ppb (3) 17.0 μg/m3 (15) 16.0 μg/m3 (59) 59.0
 
March 20, 2019, 2 a.m. 8.4 ppb (8) 0.7 ppb (1) 9.7 ppb (9) 8.0 ppb (7) N/A 0.0 ppb (0) 36.0 ppb (28) 0.25 ppb (3) 15.0 μg/m3 (14) 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 1 a.m. 7.3 ppb (7) 0.9 ppb (1) 6.8 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 42.0 ppb (32) 0.21 ppb (2) 12.0 μg/m3 (11) 15.0 μg/m3 (56) 56.0
 
March 20, 2019, midnight 6.3 ppb (6) 0.6 ppb (1) 6.7 ppb (6) 6.0 ppb (6) N/A 0.0 ppb (0) 44.0 ppb (34) 0.22 ppb (2) 10.0 μg/m3 (9) 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 11 p.m. 2.7 ppb (3) 0.2 ppb (0) 4.2 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 50.0 ppb (38) 0.18 ppb (2) 10.0 μg/m3 (9) 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 10 p.m. 1.4 ppb (1) 0.4 ppb (0) 2.6 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 53.0 ppb (41) 0.17 ppb (2) 13.0 μg/m3 (12) 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 9 p.m. 1.7 ppb (2) 0.5 ppb (0) 2.6 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 53.0 ppb (41) 0.17 ppb (2) 15.0 μg/m3 (14) 9.0 μg/m3 (38) 41.0
 
March 19, 2019, 8 p.m. 2.1 ppb (2) 0.7 ppb (1) 3.3 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 53.0 ppb (41) 0.17 ppb (2) 17.0 μg/m3 (15) 8.0 μg/m3 (33) 41.0
 
March 19, 2019, 7 p.m. 2.1 ppb (2) 1.0 ppb (1) 3.6 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 52.0 ppb (40) 0.18 ppb (2) 12.0 μg/m3 (11) 8.0 μg/m3 (33) 40.0
 
March 19, 2019, 6 p.m. 1.2 ppb (1) 0.5 ppb (0) 2.9 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 52.0 ppb (40) 0.16 ppb (2) 9.0 μg/m3 (8) 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 5 p.m. 1.6 ppb (1) 0.7 ppb (1) 3.4 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (38) 0.17 ppb (2) 14.0 μg/m3 (13) 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 4 p.m. 1.5 ppb (1) 0.6 ppb (1) 3.3 ppb (3) 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) 0.17 ppb (2) 14.0 μg/m3 (13) 13.0 μg/m3 (52) 52.0
 
March 19, 2019, 3 p.m. 1.8 ppb (2) 0.7 ppb (1) 4.0 ppb (4) 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) 0.18 ppb (2) 12.0 μg/m3 (11) 16.0 μg/m3 (59) 59.0
 
March 19, 2019, 2 p.m. 2.6 ppb (2) 1.0 ppb (1) 4.6 ppb (4) 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (32) 0.17 ppb (2) 16.0 μg/m3 (15) 13.0 μg/m3 (52) 52.0
 
March 19, 2019, 1 p.m. 5.1 ppb (5) 1.5 ppb (1) 6.9 ppb (6) 4.0 ppb (4) N/A 0.0 ppb (0) 36.0 ppb (28) 0.19 ppb (2) 15.0 μg/m3 (14) 20.9 μg/m3 (69) 69.0
 
March 19, 2019, noon 12.9 ppb (12) 2.9 ppb (3) 15.4 ppb (14) 10.0 ppb (9) N/A 0.0 ppb (0) 25.0 ppb (19) 0.28 ppb (3) 17.0 μg/m3 (15) 12.0 μg/m3 (50) 50.0
 
March 19, 2019, 11 a.m. 11.0 ppb (10) 0.8 ppb (1) 13.2 ppb (12) 10.0 ppb (9) N/A 0.0 ppb (0) 22.0 ppb (17) 0.22 ppb (2) 16.0 μg/m3 (15) 12.0 μg/m3 (50) 50.0
 
March 19, 2019, 10 a.m. 7.4 ppb (7) 0.3 ppb (0) 9.3 ppb (9) 7.0 ppb (6) N/A 0.0 ppb (0) 26.0 ppb (20) 0.19 ppb (2) 15.0 μg/m3 (14) 13.0 μg/m3 (52) 52.0
 
March 19, 2019, 9 a.m. 4.5 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 31.0 ppb (24) 0.17 ppb (2) 10.0 μg/m3 (9) 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 8 a.m. 3.6 ppb (3) 0.3 ppb (0) 5.1 ppb (5) 3.0 ppb (3) N/A 0.0 ppb (0) N/A 0.17 ppb (2) 12.0 μg/m3 (11) 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 7 a.m. 2.5 ppb (2) 0.5 ppb (0) 3.7 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 36.0 ppb (28) 0.16 ppb (2) 11.0 μg/m3 (10) 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 6 a.m. N/A N/A 3.9 ppb (4) N/A N/A N/A 36.0 ppb (28) 0.16 ppb (2) 10.0 μg/m3 (9) 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 5 a.m. 3.0 ppb (3) 0.3 ppb (0) 4.3 ppb (4) 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 11.0 μg/m3 (10) 8.0 μg/m3 (33) 33.0
 
March 19, 2019, 4 a.m. 2.6 ppb (2) 0.5 ppb (0) 3.6 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) 0.17 ppb (2) 9.0 μg/m3 (8) 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 3 a.m. 2.8 ppb (3) 0.5 ppb (0) 3.2 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (32) 0.16 ppb (2) 8.0 μg/m3 (7) 14.0 μg/m3 (54) 54.0
 
March 19, 2019, 2 a.m. 2.5 ppb (2) 0.5 ppb (0) 3.3 ppb (3) 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) 0.17 ppb (2) 9.0 μg/m3 (8) 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 1 a.m. 1.6 ppb (1) 0.3 ppb (0) 2.4 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) 0.17 ppb (2) 14.0 μg/m3 (13) 9.0 μg/m3 (38) 38.0
 
March 19, 2019, midnight 1.6 ppb (1) 0.3 ppb (0) 2.3 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) 0.17 ppb (2) 14.0 μg/m3 (13) 13.0 μg/m3 (52) 52.0
 
March 18, 2019, 11 p.m. 1.7 ppb (2) 0.3 ppb (0) 2.6 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (38) 0.17 ppb (2) 11.0 μg/m3 (10) 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 10 p.m. 1.6 ppb (1) 0.3 ppb (0) 2.6 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 52.0 ppb (40) 0.16 ppb (2) 11.0 μg/m3 (10) 11.0 μg/m3 (46) 46.0
 
March 18, 2019, 9 p.m. 1.8 ppb (2) 0.4 ppb (0) 2.6 ppb (2) 1.0 ppb (1) N/A 0.0 ppb (0) 53.0 ppb (41) 0.17 ppb (2) 14.0 μg/m3 (13) 13.0 μg/m3 (52) 52.0
 
March 18, 2019, 8 p.m. 3.6 ppb (3) 1.0 ppb (1) 3.7 ppb (3) 3.0 ppb (3) N/A 0.0 ppb (0) 54.0 ppb (42) 0.18 ppb (2) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 42.0
 
March 18, 2019, 7 p.m. 2.2 ppb (2) 0.9 ppb (1) 3.0 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) 53.0 ppb (41) 0.17 ppb (2) 10.0 μg/m3 (9) 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 6 p.m. 1.8 ppb (2) 0.6 ppb (1) 2.8 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) 52.0 ppb (40) 0.17 ppb (2) 9.0 μg/m3 (8) 14.0 μg/m3 (54) 54.0
 
March 18, 2019, 5 p.m. 2.4 ppb (2) 0.8 ppb (1) 3.3 ppb (3) 2.0 ppb (2) N/A 1.0 ppb (1) 50.0 ppb (38) 0.18 ppb (2) 13.0 μg/m3 (12) 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 4 p.m. 5.8 ppb (5) 1.9 ppb (2) 6.0 ppb (6) 4.0 ppb (4) N/A 1.0 ppb (1) 45.0 ppb (35) 0.21 ppb (2) 11.0 μg/m3 (10) 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 3 p.m. 8.6 ppb (8) 2.8 ppb (3) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 42.0 ppb (32) 0.23 ppb (3) 19.0 μg/m3 (17) 13.0 μg/m3 (52) 52.0
 
March 18, 2019, 2 p.m. 21.5 ppb (20) 8.0 ppb (7) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 30.0 ppb (23) 0.35 ppb (4) 23.0 μg/m3 (21) 16.0 μg/m3 (59) 59.0
 
March 18, 2019, 1 p.m. 29.8 ppb (28) 11.8 ppb (11) N/A 18.0 ppb (17) N/A 1.0 ppb (1) 23.0 ppb (18) 0.43 ppb (5) 22.0 μg/m3 (20) 19.0 μg/m3 (65) 65.0
 
March 18, 2019, noon 71.8 ppb (69) 51.5 ppb (48) N/A 20.0 ppb (19) N/A 1.0 ppb (1) 6.0 ppb (5) 0.72 ppb (8) 24.0 μg/m3 (22) 22.0 μg/m3 (71) 71.0
 
March 18, 2019, 11 a.m. 67.7 ppb (65) 51.0 ppb (47) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 3.0 ppb (2) 0.76 ppb (8) 17.0 μg/m3 (15) 20.0 μg/m3 (67) 67.0
 
March 18, 2019, 10 a.m. 34.8 ppb (32) 16.9 ppb (16) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 3.0 ppb (2) 0.54 ppb (6) 21.0 μg/m3 (19) 24.0 μg/m3 (76) 76.0
 
March 18, 2019, 9 a.m. 23.6 ppb (22) 4.9 ppb (5) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 5.0 ppb (4) 0.45 ppb (5) 19.0 μg/m3 (17) 18.0 μg/m3 (63) 63.0
 
March 18, 2019, 8 a.m. 19.0 ppb (18) 1.9 ppb (2) N/A 17.0 ppb (16) N/A 0.0 ppb (0) N/A 0.42 ppb (5) 17.0 μg/m3 (15) 16.0 μg/m3 (59) 59.0
 
March 18, 2019, 7 a.m. 22.9 ppb (21) 3.2 ppb (3) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 5.0 ppb (4) 0.46 ppb (5) 21.0 μg/m3 (19) 20.0 μg/m3 (67) 67.0
 
March 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 7.0 ppb (5) 0.48 ppb (5) 19.0 μg/m3 (17) 23.0 μg/m3 (73) 73.0
 
March 18, 2019, 5 a.m. 25.6 ppb (24) 3.1 ppb (3) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 8.0 ppb (6) N/A 20.0 μg/m3 (18) 20.0 μg/m3 (67) 67.0
 
March 18, 2019, 4 a.m. 22.2 ppb (21) 1.9 ppb (2) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 10.0 ppb (8) 0.47 ppb (5) 27.0 μg/m3 (25) 22.0 μg/m3 (71) 71.0
 
March 18, 2019, 3 a.m. 26.6 ppb (25) 4.1 ppb (4) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 12.0 ppb (9) 0.53 ppb (6) 17.0 μg/m3 (15) 20.0 μg/m3 (67) 67.0
 
March 18, 2019, 2 a.m. 16.5 ppb (15) 1.1 ppb (1) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 25.0 ppb (19) 0.37 ppb (4) 22.0 μg/m3 (20) 17.0 μg/m3 (61) 61.0
 
March 18, 2019, 1 a.m. 20.6 ppb (19) 1.4 ppb (1) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 20.0 ppb (15) 0.44 ppb (5) 19.0 μg/m3 (17) 13.0 μg/m3 (52) 52.0
 
March 18, 2019, midnight 28.3 ppb (26) 4.6 ppb (4) N/A 24.0 ppb (22) N/A 0.0 ppb (0) 20.0 ppb (15) 0.51 ppb (6) 14.0 μg/m3 (13) 15.9 μg/m3 (58) 58.0
 
March 17, 2019, 11 p.m. 9.9 ppb (9) 0.9 ppb (1) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 40.0 ppb (31) 0.28 ppb (3) 5.0 μg/m3 (5) 7.0 μg/m3 (29) 31.0
 
March 17, 2019, 10 p.m. 1.6 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 53.0 ppb (41) 0.15 ppb (2) 6.0 μg/m3 (5) 8.0 μg/m3 (33) 41.0
 
March 17, 2019, 9 p.m. 1.3 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 54.0 ppb (42) 0.15 ppb (2) 8.0 μg/m3 (7) 7.0 μg/m3 (29) 42.0
 
March 17, 2019, 8 p.m. 1.2 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 53.0 ppb (41) 0.15 ppb (2) 6.0 μg/m3 (5) 8.0 μg/m3 (33) 41.0
 
March 17, 2019, 7 p.m. 1.4 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 52.0 ppb (40) 0.15 ppb (2) 4.0 μg/m3 (4) 8.0 μg/m3 (33) 40.0
 
March 17, 2019, 6 p.m. 1.5 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 51.0 ppb (39) 0.16 ppb (2) 3.0 μg/m3 (3) 8.0 μg/m3 (33) 39.0
 
March 17, 2019, 5 p.m. 1.3 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (38) 0.15 ppb (2) 6.0 μg/m3 (5) 8.0 μg/m3 (33) 38.0
 
March 17, 2019, 4 p.m. 1.4 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) 0.15 ppb (2) 8.0 μg/m3 (7) 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 3 p.m. 1.5 ppb (1) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 45.0 ppb (35) 0.15 ppb (2) 9.0 μg/m3 (8) 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 2 p.m. 2.1 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 43.0 ppb (33) 0.16 ppb (2) 8.0 μg/m3 (7) 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 1 p.m. 2.8 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (30) 0.16 ppb (2) 10.0 μg/m3 (9) 11.0 μg/m3 (46) 46.0
 
March 17, 2019, noon 3.5 ppb (3) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (28) 0.16 ppb (2) 12.0 μg/m3 (11) 11.0 μg/m3 (46) 46.0
 
March 17, 2019, 11 a.m. 3.0 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 36.0 ppb (28) 0.16 ppb (2) 7.0 μg/m3 (6) 7.0 μg/m3 (29) 29.0
 
March 17, 2019, 10 a.m. 3.1 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 36.0 ppb (28) 0.15 ppb (2) 11.0 μg/m3 (10) 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 9 a.m. 3.0 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 36.0 ppb (28) 0.16 ppb (2) 14.0 μg/m3 (13) 13.0 μg/m3 (52) 52.0
 
March 17, 2019, 8 a.m. 2.7 ppb (3) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) N/A 0.17 ppb (2) 12.0 μg/m3 (11) 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 7 a.m. 2.1 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (28) 0.17 ppb (2) 10.0 μg/m3 (9) 14.0 μg/m3 (54) 54.0
 
March 17, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) 0.21 ppb (2) 20.0 μg/m3 (18) 18.0 μg/m3 (63) 63.0
 
March 17, 2019, 5 a.m. 9.5 ppb (9) 0.4 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 26.0 ppb (20) N/A 17.0 μg/m3 (15) 18.0 μg/m3 (63) 63.0
 
March 17, 2019, 4 a.m. 19.0 ppb (18) 2.0 ppb (2) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 16.0 ppb (12) 0.5 ppb (6) 27.0 μg/m3 (25) 23.0 μg/m3 (73) 73.0
 
March 17, 2019, 3 a.m. 31.5 ppb (29) 6.2 ppb (6) N/A 25.0 ppb (23) N/A 0.0 ppb (0) 7.0 ppb (5) 0.65 ppb (7) 24.0 μg/m3 (22) 20.0 μg/m3 (67) 67.0
 
March 17, 2019, 2 a.m. 36.9 ppb (34) 8.7 ppb (8) N/A 28.0 ppb (26) N/A 0.0 ppb (0) 6.0 ppb (5) 0.66 ppb (7) 25.0 μg/m3 (23) 22.0 μg/m3 (71) 71.0
 
March 17, 2019, 1 a.m. 32.1 ppb (30) 4.6 ppb (4) N/A 28.0 ppb (26) N/A 0.0 ppb (0) 10.0 ppb (8) 0.62 ppb (7) 17.0 μg/m3 (15) 16.0 μg/m3 (59) 59.0
 
March 17, 2019, midnight 27.9 ppb (26) 4.5 ppb (4) N/A 23.0 ppb (21) N/A 0.0 ppb (0) 17.0 ppb (13) 0.52 ppb (6) 8.0 μg/m3 (7) 9.0 μg/m3 (38) 38.0
 
March 16, 2019, 11 p.m. 17.1 ppb (16) 3.7 ppb (3) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 31.0 ppb (24) 0.35 ppb (4) 6.0 μg/m3 (5) 9.0 μg/m3 (38) 38.0
 
March 16, 2019, 10 p.m. 1.7 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) 0.15 ppb (2) 9.0 μg/m3 (8) 4.0 μg/m3 (17) 37.0
 
March 16, 2019, 9 p.m. 1.1 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (38) 0.14 ppb (2) 8.0 μg/m3 (7) 6.0 μg/m3 (25) 38.0
 
March 16, 2019, 8 p.m. 1.1 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (38) 0.14 ppb (2) 5.0 μg/m3 (5) 7.0 μg/m3 (29) 38.0
 
March 16, 2019, 7 p.m. 0.8 ppb (1) 0.3 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 50.0 ppb (38) 0.14 ppb (2) 6.0 μg/m3 (5) 4.0 μg/m3 (17) 38.0
 
March 16, 2019, 6 p.m. 1.0 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (38) 0.14 ppb (2) 6.0 μg/m3 (5) 7.0 μg/m3 (29) 38.0
 
March 16, 2019, 5 p.m. 1.2 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) 0.14 ppb (2) 6.0 μg/m3 (5) 9.0 μg/m3 (38) 38.0
 
March 16, 2019, 4 p.m. 1.2 ppb (1) 0.5 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) 0.14 ppb (2) 6.0 μg/m3 (5) 6.0 μg/m3 (25) 37.0
 
March 16, 2019, 3 p.m. 1.8 ppb (2) 0.7 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 47.0 ppb (36) 0.15 ppb (2) 7.0 μg/m3 (6) 6.0 μg/m3 (25) 36.0
 
March 16, 2019, 2 p.m. 2.5 ppb (2) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) 0.14 ppb (2) 6.0 μg/m3 (5) 9.0 μg/m3 (38) 38.0