AQSQID: 370630015

Site Name: Durham Armory

Location: Durham, NC

Reporting: True, Located: True

Current AQI: 38.0

Durham NC, US: 35.9919, -78.8964

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 22, 2019, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 37.0 ppb (28) N/A 13.0 μg/m3 (12) 9.0 μg/m3 (38) 38.0
 
March 22, 2019, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 40.0 ppb (31) N/A 17.0 μg/m3 (15) 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 45.0 ppb (35) N/A 9.0 μg/m3 (8) 14.0 μg/m3 (54) 54.0
 
March 22, 2019, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 38.0 ppb (29) N/A 17.0 μg/m3 (15) 13.0 μg/m3 (52) 52.0
 
March 22, 2019, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 33.0 ppb (25) N/A 17.0 μg/m3 (15) 19.0 μg/m3 (65) 65.0
 
March 22, 2019, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 20.0 ppb (15) N/A 16.0 μg/m3 (15) 18.0 μg/m3 (63) 63.0
 
March 21, 2019, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 22.0 ppb (17) N/A 16.0 μg/m3 (15) 13.0 μg/m3 (52) 52.0
 
March 21, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) N/A 11.0 μg/m3 (10) 15.0 μg/m3 (56) 56.0
 
March 21, 2019, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 51.0 ppb (39) N/A 10.0 μg/m3 (9) 11.0 μg/m3 (46) 46.0
 
March 21, 2019, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 53.0 ppb (41) N/A 12.0 μg/m3 (11) 7.0 μg/m3 (29) 41.0
 
March 21, 2019, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 54.0 ppb (42) N/A 8.0 μg/m3 (7) 10.0 μg/m3 (42) 42.0
 
March 21, 2019, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 52.0 ppb (40) N/A 9.0 μg/m3 (8) 9.0 μg/m3 (38) 40.0
 
March 21, 2019, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 53.0 ppb (41) N/A 2.0 μg/m3 (2) 4.0 μg/m3 (17) 41.0
 
March 21, 2019, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 48.0 ppb (37) N/A 4.0 μg/m3 (4) 6.0 μg/m3 (25) 37.0
 
March 21, 2019, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 44.0 ppb (34) N/A 8.0 μg/m3 (7) 5.0 μg/m3 (21) 34.0
 
March 21, 2019, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 42.0 ppb (32) N/A 7.0 μg/m3 (6) 4.0 μg/m3 (17) 32.0
 
March 21, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) N/A 3.0 μg/m3 (3) 5.0 μg/m3 (21) 30.0
 
March 21, 2019, noon N/A N/A N/A N/A N/A 1.0 ppb (1) 39.0 ppb (30) N/A 4.0 μg/m3 (4) 5.0 μg/m3 (21) 30.0
 
March 21, 2019, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 40.0 ppb (31) N/A 3.0 μg/m3 (3) 7.0 μg/m3 (29) 31.0
 
March 21, 2019, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 38.0 ppb (29) N/A 3.0 μg/m3 (3) 5.0 μg/m3 (21) 29.0
 
March 21, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) N/A 5.0 μg/m3 (5) 7.0 μg/m3 (29) 29.0
 
March 21, 2019, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (5) 7.0 μg/m3 (29) 29.0
 
March 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 9.0 μg/m3 (8) 7.0 μg/m3 (29) 30.0
 
March 21, 2019, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 40.0 ppb (31) N/A 8.0 μg/m3 (7) 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) N/A 11.0 μg/m3 (10) 6.0 μg/m3 (25) 32.0
 
March 21, 2019, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 42.0 ppb (32) N/A 10.0 μg/m3 (9) 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 42.0 ppb (32) N/A 12.0 μg/m3 (11) 10.0 μg/m3 (42) 42.0
 
March 21, 2019, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 44.0 ppb (34) N/A 12.0 μg/m3 (11) 10.0 μg/m3 (42) 42.0
 
March 21, 2019, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 43.0 ppb (33) N/A 13.0 μg/m3 (12) 10.0 μg/m3 (42) 42.0
 
March 21, 2019, midnight N/A N/A N/A N/A N/A 1.0 ppb (1) 43.0 ppb (33) N/A 14.0 μg/m3 (13) 16.0 μg/m3 (59) 59.0
 
March 20, 2019, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 45.0 ppb (35) N/A 13.0 μg/m3 (12) 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 45.0 ppb (35) N/A 13.0 μg/m3 (12) 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 47.0 ppb (36) N/A 26.0 μg/m3 (24) 13.0 μg/m3 (52) 52.0
 
March 20, 2019, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 49.0 ppb (38) N/A 12.0 μg/m3 (11) 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 50.0 ppb (38) N/A 16.0 μg/m3 (15) 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 50.0 ppb (38) N/A 9.0 μg/m3 (8) 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 50.0 ppb (38) N/A 14.0 μg/m3 (13) 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 47.0 ppb (36) N/A 20.0 μg/m3 (18) 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 45.0 ppb (35) N/A 15.0 μg/m3 (14) 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 44.0 ppb (34) N/A 19.0 μg/m3 (17) 15.0 μg/m3 (56) 56.0
 
March 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A 25.0 μg/m3 (23) 12.0 μg/m3 (50) 50.0
 
March 20, 2019, noon N/A N/A N/A N/A N/A 1.0 ppb (1) 36.0 ppb (28) N/A 21.0 μg/m3 (19) 13.0 μg/m3 (52) 52.0
 
March 20, 2019, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 35.0 ppb (27) N/A 19.0 μg/m3 (17) 9.0 μg/m3 (38) 38.0
 
March 20, 2019, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 36.0 ppb (28) N/A 11.0 μg/m3 (10) 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 37.0 ppb (28) N/A 9.0 μg/m3 (8) 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 17.0 μg/m3 (15) 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A 11.0 μg/m3 (10) 14.0 μg/m3 (54) 54.0
 
March 20, 2019, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 30.0 ppb (23) N/A 10.0 μg/m3 (9) 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 5 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 34.0 ppb (26) N/A 18.0 μg/m3 (16) 13.0 μg/m3 (52) 52.0
 
March 20, 2019, 4 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 21.0 ppb (16) N/A 19.0 μg/m3 (17) 15.0 μg/m3 (56) 56.0
 
March 20, 2019, 3 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 17.0 ppb (13) N/A 19.0 μg/m3 (17) 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 22.0 ppb (17) N/A 19.0 μg/m3 (17) 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 19.0 ppb (15) N/A 17.0 μg/m3 (15) 9.0 μg/m3 (38) 38.0
 
March 20, 2019, midnight N/A N/A N/A N/A N/A 1.0 ppb (1) 44.0 ppb (34) N/A 12.0 μg/m3 (11) 8.0 μg/m3 (33) 34.0
 
March 19, 2019, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 49.0 ppb (38) N/A 14.0 μg/m3 (13) 9.0 μg/m3 (38) 38.0
 
March 19, 2019, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 51.0 ppb (39) N/A 12.0 μg/m3 (11) 7.0 μg/m3 (29) 39.0
 
March 19, 2019, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 52.0 ppb (40) N/A 10.0 μg/m3 (9) 7.0 μg/m3 (29) 40.0
 
March 19, 2019, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 53.0 ppb (41) N/A 11.0 μg/m3 (10) 8.0 μg/m3 (33) 41.0
 
March 19, 2019, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 52.0 ppb (40) N/A 9.0 μg/m3 (8) 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 51.0 ppb (39) N/A 12.0 μg/m3 (11) 13.0 μg/m3 (52) 52.0
 
March 19, 2019, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 50.0 ppb (38) N/A 11.0 μg/m3 (10) 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 47.0 ppb (36) N/A 13.0 μg/m3 (12) 12.0 μg/m3 (50) 50.0
 
March 19, 2019, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 43.0 ppb (33) N/A 11.0 μg/m3 (10) 13.0 μg/m3 (52) 52.0
 
March 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A 19.0 μg/m3 (17) 14.0 μg/m3 (54) 54.0
 
March 19, 2019, noon N/A N/A N/A N/A N/A 1.0 ppb (1) 26.0 ppb (20) N/A 22.0 μg/m3 (20) 13.0 μg/m3 (52) 52.0
 
March 19, 2019, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 10.0 ppb (8) N/A 16.0 μg/m3 (15) 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 19.0 ppb (15) N/A 14.0 μg/m3 (13) 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 31.0 ppb (24) N/A 12.0 μg/m3 (11) 8.0 μg/m3 (33) 33.0
 
March 19, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 11.0 μg/m3 (10) 12.0 μg/m3 (50) 50.0
 
March 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A 13.0 μg/m3 (12) 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (24) N/A 16.0 μg/m3 (15) 9.0 μg/m3 (38) 38.0
 
March 19, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (25) N/A 11.0 μg/m3 (10) 9.0 μg/m3 (38) 38.0
 
March 19, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) N/A 12.0 μg/m3 (11) 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) N/A 12.0 μg/m3 (11) 8.0 μg/m3 (33) 33.0
 
March 19, 2019, 2 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 42.0 ppb (32) N/A 15.0 μg/m3 (14) 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 44.0 ppb (34) N/A 14.0 μg/m3 (13) 10.0 μg/m3 (42) 42.0
 
March 19, 2019, midnight N/A N/A N/A N/A N/A 1.0 ppb (1) 46.0 ppb (35) N/A 15.0 μg/m3 (14) 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 48.0 ppb (37) N/A 11.0 μg/m3 (10) 8.0 μg/m3 (33) 37.0
 
March 18, 2019, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 50.0 ppb (38) N/A 19.0 μg/m3 (17) 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 9 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 52.0 ppb (40) N/A 17.0 μg/m3 (15) 8.0 μg/m3 (33) 40.0
 
March 18, 2019, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 52.0 ppb (40) N/A 11.0 μg/m3 (10) 7.0 μg/m3 (29) 40.0
 
March 18, 2019, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 52.0 ppb (40) N/A 13.0 μg/m3 (12) 6.0 μg/m3 (25) 40.0
 
March 18, 2019, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 52.0 ppb (40) N/A 11.0 μg/m3 (10) 6.0 μg/m3 (25) 40.0
 
March 18, 2019, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 49.0 ppb (38) N/A 11.0 μg/m3 (10) 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 43.0 ppb (33) N/A 15.0 μg/m3 (14) 9.0 μg/m3 (38) 38.0
 
March 18, 2019, 3 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 40.0 ppb (31) N/A 17.0 μg/m3 (15) 8.0 μg/m3 (33) 33.0
 
March 18, 2019, 2 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) 40.0 ppb (31) N/A 11.0 μg/m3 (10) 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 22.0 ppb (17) N/A 15.0 μg/m3 (14) 11.0 μg/m3 (46) 46.0
 
March 18, 2019, noon N/A N/A N/A N/A N/A 1.0 ppb (1) 3.0 ppb (2) N/A 21.0 μg/m3 (19) 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 2.0 ppb (2) N/A 18.0 μg/m3 (16) 13.0 μg/m3 (52) 52.0
 
March 18, 2019, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 1.0 ppb (1) N/A 20.0 μg/m3 (18) 13.0 μg/m3 (52) 52.0
 
March 18, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 2.0 ppb (2) N/A 13.0 μg/m3 (12) 13.0 μg/m3 (52) 52.0
 
March 18, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 16.0 μg/m3 (15) 16.0 μg/m3 (59) 59.0
 
March 18, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 2.0 ppb (2) N/A 16.0 μg/m3 (15) 16.0 μg/m3 (59) 59.0
 
March 18, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 2.0 ppb (2) N/A 19.0 μg/m3 (17) 15.0 μg/m3 (56) 56.0
 
March 18, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 4.0 ppb (3) N/A 19.0 μg/m3 (17) 14.0 μg/m3 (54) 54.0
 
March 18, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 9.0 ppb (7) N/A 19.0 μg/m3 (17) 19.0 μg/m3 (65) 65.0
 
March 18, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 10.0 ppb (8) N/A 22.0 μg/m3 (20) 14.0 μg/m3 (54) 54.0
 
March 18, 2019, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 10.0 ppb (8) N/A 19.0 μg/m3 (17) 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 1 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 15.0 ppb (12) N/A 13.0 μg/m3 (12) 12.0 μg/m3 (50) 50.0
 
March 18, 2019, midnight N/A N/A N/A N/A N/A 1.0 ppb (1) 28.0 ppb (22) N/A 9.0 μg/m3 (8) 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 11 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 41.0 ppb (32) N/A 8.0 μg/m3 (7) 5.0 μg/m3 (21) 32.0
 
March 17, 2019, 10 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 49.0 ppb (38) N/A 5.0 μg/m3 (5) 7.0 μg/m3 (29) 38.0
 
March 17, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 50.0 ppb (38) N/A 7.0 μg/m3 (6) 7.0 μg/m3 (29) 38.0
 
March 17, 2019, 8 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 50.0 ppb (38) N/A 6.0 μg/m3 (5) 6.0 μg/m3 (25) 38.0
 
March 17, 2019, 7 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 50.0 ppb (38) N/A 5.0 μg/m3 (5) 6.0 μg/m3 (25) 38.0
 
March 17, 2019, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 49.0 ppb (38) N/A 7.0 μg/m3 (6) 5.0 μg/m3 (21) 38.0
 
March 17, 2019, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 48.0 ppb (37) N/A 7.0 μg/m3 (6) 5.0 μg/m3 (21) 37.0
 
March 17, 2019, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 47.0 ppb (36) N/A 5.0 μg/m3 (5) 6.0 μg/m3 (25) 36.0
 
March 17, 2019, 3 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 45.0 ppb (35) N/A 6.0 μg/m3 (5) 6.0 μg/m3 (25) 35.0
 
March 17, 2019, 2 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 41.0 ppb (32) N/A 6.0 μg/m3 (5) 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 1 p.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 38.0 ppb (29) N/A 7.0 μg/m3 (6) 8.0 μg/m3 (33) 33.0
 
March 17, 2019, noon N/A N/A N/A N/A N/A 1.0 ppb (1) 34.0 ppb (26) N/A 11.0 μg/m3 (10) 7.0 μg/m3 (29) 29.0
 
March 17, 2019, 11 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 33.0 ppb (25) N/A 9.0 μg/m3 (8) 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 10 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 25.0 ppb (19) N/A 11.0 μg/m3 (10) 7.0 μg/m3 (29) 29.0
 
March 17, 2019, 9 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 25.0 ppb (19) N/A 10.0 μg/m3 (9) 7.0 μg/m3 (29) 29.0
 
March 17, 2019, 8 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (9) 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A 12.0 μg/m3 (11) 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 6 a.m. N/A N/A N/A N/A N/A 1.0 ppb (1) 25.0 ppb (19) N/A 16.0 μg/m3 (15) 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (22) N/A 15.0 μg/m3 (14) 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 9.0 ppb (7) N/A 19.0 μg/m3 (17) 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 9.0 ppb (7) N/A 10.0 μg/m3 (9) 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 14.0 ppb (11) N/A 11.0 μg/m3 (10) 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 17.0 ppb (13) N/A 14.0 μg/m3 (13) 7.0 μg/m3 (29) 29.0
 
March 17, 2019, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (22) N/A 8.0 μg/m3 (7) 6.0 μg/m3 (25) 25.0
 
March 16, 2019, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) N/A 7.0 μg/m3 (6) 5.0 μg/m3 (21) 30.0
 
March 16, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 45.0 ppb (35) N/A 11.0 μg/m3 (10) 5.0 μg/m3 (21) 35.0
 
March 16, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 49.0 ppb (38) N/A 12.0 μg/m3 (11) 6.0 μg/m3 (25) 38.0
 
March 16, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (37) N/A 6.0 μg/m3 (5) 4.0 μg/m3 (17) 37.0
 
March 16, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 47.0 ppb (36) N/A 7.0 μg/m3 (6) 4.0 μg/m3 (17) 36.0
 
March 16, 2019, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 48.0 ppb (37) N/A 5.0 μg/m3 (5) 4.0 μg/m3 (17) 37.0
 
March 16, 2019, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 47.0 ppb (36) N/A 6.0 μg/m3 (5) 4.0 μg/m3 (17) 36.0
 
March 16, 2019, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (35) N/A 8.0 μg/m3 (7) 4.0 μg/m3 (17) 35.0
 
March 16, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 46.0 ppb (35) N/A 7.0 μg/m3 (6) 5.0 μg/m3 (21) 35.0
 
March 16, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (34) N/A 8.0 μg/m3 (7) 6.0 μg/m3 (25) 34.0
 
March 16, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) N/A 7.0 μg/m3 (6) 6.0 μg/m3 (25) 32.0
 
March 16, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (32) N/A 5.0 μg/m3 (5) 6.0 μg/m3 (25) 32.0
 
March 16, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) N/A 7.0 μg/m3 (6) 5.0 μg/m3 (21) 32.0
 
March 16, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 42.0 ppb (32) N/A 10.0 μg/m3 (9) 6.0 μg/m3 (25) 32.0
 
March 16, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (32) N/A 8.0 μg/m3 (7) 6.0 μg/m3 (25) 32.0
 
March 16, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 11.0 μg/m3 (10) 6.0 μg/m3 (25) 25.0
 
March 16, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A 9.0 μg/m3 (8) 7.0 μg/m3 (29) 32.0
 
March 16, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 41.0 ppb (32) N/A 21.0 μg/m3 (19) 9.0 μg/m3 (38) 38.0
 
March 16, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 34.0 ppb (26) N/A 19.0 μg/m3 (17) 9.0 μg/m3 (38) 38.0
 
March 16, 2019, 4 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (22) N/A 18.0 μg/m3 (16) 7.0 μg/m3 (29) 29.0
 
March 16, 2019, 3 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (22) N/A 16.0 μg/m3 (15) 10.0 μg/m3 (42) 42.0
 
March 16, 2019, 2 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 26.0 ppb (20) N/A 15.0 μg/m3 (14) 8.0 μg/m3 (33) 33.0
 
March 16, 2019, 1 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 25.0 ppb (19) N/A 21.0 μg/m3 (19) 14.0 μg/m3 (54) 54.0
 
March 16, 2019, midnight N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (22) N/A 24.0 μg/m3 (22) 19.0 μg/m3 (65) 65.0
 
March 15, 2019, 11 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (24) N/A 17.0 μg/m3 (15) 12.0 μg/m3 (50) 50.0
 
March 15, 2019, 10 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (22) N/A 15.0 μg/m3 (14) 8.0 μg/m3 (33) 33.0
 
March 15, 2019, 9 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 28.0 ppb (22) N/A 17.0 μg/m3 (15) 12.0 μg/m3 (50) 50.0
 
March 15, 2019, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (22) N/A 12.0 μg/m3 (11) 10.0 μg/m3 (42) 42.0
 
March 15, 2019, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 30.0 ppb (23) N/A 20.0 μg/m3 (18) 11.0 μg/m3 (46) 46.0
 
March 15, 2019, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) N/A 15.0 μg/m3 (14) 10.0 μg/m3 (42) 42.0
 
March 15, 2019, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) N/A 22.0 μg/m3 (20) 10.0 μg/m3 (42) 42.0
 
March 15, 2019, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 39.0 ppb (30) N/A 16.0 μg/m3 (15) 9.0 μg/m3 (38) 38.0
 
March 15, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 38.0 ppb (29) N/A 21.0 μg/m3 (19) 10.0 μg/m3 (42) 42.0
 
March 15, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) N/A 13.0 μg/m3 (12) 11.0 μg/m3 (46) 46.0
 
March 15, 2019, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 35.0 ppb (27) N/A 19.0 μg/m3 (17) 9.0 μg/m3 (38) 38.0
 
March 15, 2019, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 31.0 ppb (24) N/A 17.0 μg/m3 (15) 8.0 μg/m3 (33) 33.0
 
March 15, 2019, 11 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (25) N/A 20.0 μg/m3 (18) 11.0 μg/m3 (46) 46.0
 
March 15, 2019, 10 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 37.0 ppb (28) N/A 19.0 μg/m3 (17) 13.0 μg/m3 (52) 52.0
 
March 15, 2019, 9 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 40.0 ppb (31) N/A 15.0 μg/m3 (14) 11.0 μg/m3 (46) 46.0
 
March 15, 2019, 8 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) N/A N/A 14.0 μg/m3 (13) 10.0 μg/m3 (42) 42.0
 
March 15, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A 16.0 μg/m3 (15) 9.0 μg/m3 (38) 38.0
 
March 15, 2019, 6 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (34) N/A 15.0 μg/m3 (14) 10.0 μg/m3 (42) 42.0
 
March 15, 2019, 5 a.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 45.0 ppb (35) N/A 17.0 μg/m3 (15) 11.0 μg/m3 (46) 46.0