AQSQID: 440071010

Site Name: E Providence

Location: E Providence, RI

Reporting: True, Located: True

Current AQI: 35.0

E Providence RI, US: 41.840302, -71.361702

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 24, 2019, noon 4.7 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 46.0 ppb (35) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 35.0
 
March 24, 2019, 11 a.m. 6.7 ppb (6) 0.5 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 42.0 ppb (32) 0.19 ppb (2) N/A 3.0 μg/m3 (12) 32.0
 
March 24, 2019, 10 a.m. 6.1 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 43.0 ppb (33) 0.18 ppb (2) N/A 2.0 μg/m3 (8) 33.0
 
March 24, 2019, 9 a.m. 4.1 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (35) 0.17 ppb (2) N/A 3.0 μg/m3 (12) 35.0
 
March 24, 2019, 8 a.m. 12.3 ppb (11) 0.2 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 36.0 ppb (28) 0.21 ppb (2) N/A 2.0 μg/m3 (8) 28.0
 
March 24, 2019, 7 a.m. 5.1 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 44.0 ppb (34) 0.18 ppb (2) N/A 3.0 μg/m3 (12) 34.0
 
March 24, 2019, 6 a.m. 3.5 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (35) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 35.0
 
March 24, 2019, 5 a.m. 2.8 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 46.0 ppb (35) 0.16 ppb (2) N/A 2.0 μg/m3 (8) 35.0
 
March 24, 2019, 3 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 48.0 ppb (37) 0.16 ppb (2) N/A 2.0 μg/m3 (8) 37.0
 
March 24, 2019, 2 a.m. 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 48.0 ppb (37) 0.16 ppb (2) N/A 3.0 μg/m3 (12) 37.0
 
March 24, 2019, 1 a.m. 2.5 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) 0.16 ppb (2) N/A -2.0 μg/m3 (0) 38.0
 
March 24, 2019, midnight 2.6 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) 0.16 ppb (2) N/A -1.0 μg/m3 (0) 38.0
 
March 23, 2019, 11 p.m. 2.2 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 49.0 ppb (38) 0.16 ppb (2) N/A 1.0 μg/m3 (4) 38.0
 
March 23, 2019, 10 p.m. 1.8 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 51.0 ppb (39) 0.16 ppb (2) N/A 1.0 μg/m3 (4) 39.0
 
March 23, 2019, 9 p.m. 1.5 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 52.0 ppb (40) 0.17 ppb (2) N/A 0.0 μg/m3 (0) 40.0
 
March 23, 2019, 8 p.m. 1.3 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 52.0 ppb (40) 0.17 ppb (2) N/A 3.0 μg/m3 (12) 40.0
 
March 23, 2019, 7 p.m. 1.7 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 51.0 ppb (39) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 39.0
 
March 23, 2019, 6 p.m. 1.6 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 38.0
 
March 23, 2019, 5 p.m. 1.6 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) 0.16 ppb (2) N/A -1.0 μg/m3 (0) 38.0
 
March 23, 2019, 4 p.m. 1.5 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) 0.16 ppb (2) N/A 1.0 μg/m3 (4) 38.0
 
March 23, 2019, 3 p.m. 1.8 ppb (2) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) 0.16 ppb (2) N/A 0.0 μg/m3 (0) 36.0
 
March 23, 2019, 2 p.m. 1.7 ppb (2) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) 0.16 ppb (2) N/A 3.0 μg/m3 (12) 35.0
 
March 23, 2019, 1 p.m. 2.3 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) 0.16 ppb (2) N/A 7.0 μg/m3 (29) 34.0
 
March 23, 2019, noon 2.5 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) 0.16 ppb (2) N/A 0.0 μg/m3 (0) 33.0
 
March 23, 2019, 11 a.m. 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (32) 0.16 ppb (2) N/A -1.0 μg/m3 (0) 32.0
 
March 23, 2019, 10 a.m. 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) 0.16 ppb (2) N/A 0.0 μg/m3 (0) 31.0
 
March 23, 2019, 9 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (30) 0.16 ppb (2) N/A 1.0 μg/m3 (4) 30.0
 
March 23, 2019, 8 a.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (28) 0.16 ppb (2) N/A 2.0 μg/m3 (8) 28.0
 
March 23, 2019, 7 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (27) 0.16 ppb (2) N/A 3.0 μg/m3 (12) 27.0
 
March 23, 2019, 6 a.m. 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (25) 0.16 ppb (2) N/A 0.0 μg/m3 (0) 25.0
 
March 23, 2019, 5 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (26) 0.17 ppb (2) N/A -1.0 μg/m3 (0) 26.0
 
March 23, 2019, 4 a.m. 2.2 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) 0.18 ppb (2) N/A 0.0 μg/m3 (0) 29.0
 
March 23, 2019, 3 a.m. 2.6 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) 0.2 ppb (2) N/A 0.0 μg/m3 (0) 33.0
 
March 23, 2019, 2 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 44.0 ppb (34) 0.21 ppb (2) N/A -1.0 μg/m3 (0) 34.0
 
March 23, 2019, 1 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 44.0 ppb (34) 0.21 ppb (2) N/A 3.0 μg/m3 (12) 34.0
 
March 23, 2019, midnight 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) 0.21 ppb (2) N/A 5.0 μg/m3 (21) 33.0
 
March 22, 2019, 11 p.m. 3.2 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) 0.2 ppb (2) N/A 2.0 μg/m3 (8) 33.0
 
March 22, 2019, 10 p.m. 3.6 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (35) 0.2 ppb (2) N/A 2.0 μg/m3 (8) 35.0
 
March 22, 2019, 9 p.m. 3.0 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 50.0 ppb (38) 0.18 ppb (2) N/A 2.0 μg/m3 (8) 38.0
 
March 22, 2019, 8 p.m. 2.9 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 50.0 ppb (38) 0.18 ppb (2) N/A 1.0 μg/m3 (4) 38.0
 
March 22, 2019, 7 p.m. 3.3 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) 0.19 ppb (2) N/A 1.0 μg/m3 (4) 38.0
 
March 22, 2019, 6 p.m. 4.6 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 46.0 ppb (35) 0.19 ppb (2) N/A 2.0 μg/m3 (8) 35.0
 
March 22, 2019, 5 p.m. 6.6 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 44.0 ppb (34) 0.2 ppb (2) N/A 3.0 μg/m3 (12) 34.0
 
March 22, 2019, 4 p.m. 5.9 ppb (5) 0.4 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 45.0 ppb (35) 0.24 ppb (3) N/A 2.0 μg/m3 (8) 35.0
 
March 22, 2019, 3 p.m. 5.7 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 47.0 ppb (36) 0.19 ppb (2) N/A 1.0 μg/m3 (4) 36.0
 
March 22, 2019, 2 p.m. 6.9 ppb (6) 0.8 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 47.0 ppb (36) 0.2 ppb (2) N/A 1.0 μg/m3 (4) 36.0
 
March 22, 2019, 1 p.m. 3.8 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 51.0 ppb (39) 0.17 ppb (2) N/A 1.0 μg/m3 (4) 39.0
 
March 22, 2019, noon 3.9 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 52.0 ppb (40) 0.17 ppb (2) N/A 3.0 μg/m3 (12) 40.0
 
March 22, 2019, 11 a.m. 3.4 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 52.0 ppb (40) 0.17 ppb (2) N/A 4.0 μg/m3 (17) 40.0
 
March 22, 2019, 10 a.m. 3.3 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 51.0 ppb (39) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 39.0
 
March 22, 2019, 9 a.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 52.0 ppb (40) 0.16 ppb (2) N/A 2.0 μg/m3 (8) 40.0
 
March 22, 2019, 8 a.m. 2.0 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 51.0 ppb (39) 0.16 ppb (2) N/A 0.0 μg/m3 (0) 39.0
 
March 22, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 2.0 μg/m3 (8) 38.0
 
March 22, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
March 22, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 5.0 μg/m3 (21) 37.0
 
March 22, 2019, 3 a.m. 3.0 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) 0.16 ppb (2) N/A 9.0 μg/m3 (38) 38.0
 
March 22, 2019, 2 a.m. 2.8 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 48.0 ppb (37) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 37.0
 
March 22, 2019, 1 a.m. 3.2 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) 0.17 ppb (2) N/A 8.0 μg/m3 (33) 36.0
 
March 22, 2019, midnight 2.9 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) 0.17 ppb (2) N/A 8.0 μg/m3 (33) 38.0
 
March 21, 2019, 11 p.m. 3.1 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 50.0 ppb (38) 0.17 ppb (2) N/A 7.0 μg/m3 (29) 38.0
 
March 21, 2019, 10 p.m. 4.0 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 52.0 ppb (40) 0.18 ppb (2) N/A 4.0 μg/m3 (17) 40.0
 
March 21, 2019, 9 p.m. 3.8 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 54.0 ppb (42) 0.17 ppb (2) N/A 7.0 μg/m3 (29) 42.0
 
March 21, 2019, 8 p.m. 3.6 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 54.0 ppb (42) 0.17 ppb (2) N/A 7.0 μg/m3 (29) 42.0
 
March 21, 2019, 7 p.m. 2.6 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 57.0 ppb (44) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 44.0
 
March 21, 2019, 6 p.m. 2.8 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 57.0 ppb (44) 0.17 ppb (2) N/A 2.0 μg/m3 (8) 44.0
 
March 21, 2019, 5 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 56.0 ppb (43) 0.17 ppb (2) N/A 5.0 μg/m3 (21) 43.0
 
March 21, 2019, 4 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 55.0 ppb (42) 0.17 ppb (2) N/A 7.0 μg/m3 (29) 42.0
 
March 21, 2019, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 55.0 ppb (42) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 42.0
 
March 21, 2019, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 54.0 ppb (42) 0.18 ppb (2) N/A 5.0 μg/m3 (21) 42.0
 
March 21, 2019, 1 p.m. 5.6 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 51.0 ppb (39) 0.19 ppb (2) N/A 7.0 μg/m3 (29) 39.0
 
March 21, 2019, noon 12.2 ppb (11) 1.5 ppb (1) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 41.0 ppb (32) 0.25 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 11 a.m. 17.4 ppb (16) 1.0 ppb (1) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 35.0 ppb (27) 0.27 ppb (3) N/A 6.0 μg/m3 (25) 27.0
 
March 21, 2019, 10 a.m. 26.2 ppb (24) 1.0 ppb (1) N/A 25.0 ppb (23) N/A 0.0 ppb (0) 20.0 ppb (15) 0.47 ppb (5) N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 9 a.m. 14.4 ppb (13) 0.2 ppb (0) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 36.0 ppb (28) 0.27 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
March 21, 2019, 8 a.m. 19.1 ppb (18) 0.3 ppb (0) N/A 19.0 ppb (18) N/A 0.0 ppb (0) N/A 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
March 21, 2019, 7 a.m. 23.4 ppb (22) 0.2 ppb (0) N/A 23.0 ppb (21) N/A 0.0 ppb (0) N/A 0.33 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 6 a.m. 19.5 ppb (18) 0.1 ppb (0) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 23.0 ppb (18) 0.27 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
March 21, 2019, 5 a.m. 20.8 ppb (19) 0.0 ppb (0) N/A 21.0 ppb (19) N/A 0.0 ppb (0) 26.0 ppb (20) 0.26 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
March 21, 2019, 3 a.m. 10.2 ppb (9) 0.3 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 47.0 ppb (36) 0.21 ppb (2) N/A 8.0 μg/m3 (33) 36.0
 
March 21, 2019, 2 a.m. 9.6 ppb (9) 0.3 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 49.0 ppb (38) 0.21 ppb (2) N/A 7.0 μg/m3 (29) 38.0
 
March 21, 2019, 1 a.m. 9.9 ppb (9) 0.2 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 48.0 ppb (37) 0.24 ppb (3) N/A 8.0 μg/m3 (33) 37.0
 
March 21, 2019, midnight 8.6 ppb (8) 0.2 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 51.0 ppb (39) 0.22 ppb (2) N/A 7.0 μg/m3 (29) 39.0
 
March 20, 2019, 11 p.m. 7.9 ppb (7) 0.2 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 52.0 ppb (40) 0.2 ppb (2) N/A 8.0 μg/m3 (33) 40.0
 
March 20, 2019, 10 p.m. 6.1 ppb (6) 0.3 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 55.0 ppb (42) 0.19 ppb (2) N/A 6.0 μg/m3 (25) 42.0
 
March 20, 2019, 9 p.m. 4.3 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 57.0 ppb (44) 0.19 ppb (2) N/A 7.0 μg/m3 (29) 44.0
 
March 20, 2019, 8 p.m. 4.3 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 59.0 ppb (45) 0.18 ppb (2) N/A 10.0 μg/m3 (42) 45.0
 
March 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) 2.2 ppb (24) N/A 8.0 μg/m3 (33) 44.0
 
March 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) 0.57 ppb (6) N/A 7.0 μg/m3 (29) 43.0
 
March 20, 2019, 5 p.m. 3.7 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 54.0 ppb (42) 0.19 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 4 p.m. 3.6 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 53.0 ppb (41) 0.17 ppb (2) N/A 9.0 μg/m3 (38) 41.0
 
March 20, 2019, 3 p.m. 3.9 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 53.0 ppb (41) 0.17 ppb (2) N/A 7.0 μg/m3 (29) 41.0
 
March 20, 2019, 2 p.m. 11.8 ppb (11) 2.8 ppb (3) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 45.0 ppb (35) 0.22 ppb (2) N/A 8.0 μg/m3 (33) 35.0
 
March 20, 2019, 1 p.m. 44.1 ppb (41) 16.7 ppb (15) N/A 27.0 ppb (25) N/A 1.0 ppb (1) 22.0 ppb (17) 0.41 ppb (5) N/A 14.0 μg/m3 (54) 54.0
 
March 20, 2019, noon 52.4 ppb (49) 22.8 ppb (21) N/A 30.0 ppb (28) N/A 1.0 ppb (1) 13.0 ppb (10) 0.54 ppb (6) N/A 14.0 μg/m3 (54) 54.0
 
March 20, 2019, 11 a.m. 81.9 ppb (80) 49.3 ppb (46) N/A 33.0 ppb (31) N/A 0.0 ppb (0) 4.0 ppb (3) 0.84 ppb (9) N/A 12.0 μg/m3 (50) 80.0
 
March 20, 2019, 10 a.m. 76.8 ppb (74) 42.2 ppb (39) N/A 35.0 ppb (32) N/A 0.0 ppb (0) 3.0 ppb (2) 0.71 ppb (8) N/A 13.0 μg/m3 (52) 74.0
 
March 20, 2019, 9 a.m. 64.5 ppb (61) 31.7 ppb (29) N/A 33.0 ppb (31) N/A 0.0 ppb (0) 3.0 ppb (2) 0.52 ppb (6) N/A 11.0 μg/m3 (46) 61.0
 
March 20, 2019, 8 a.m. 61.0 ppb (57) 24.4 ppb (23) N/A 37.0 ppb (34) N/A 0.0 ppb (0) 3.0 ppb (2) 0.5 ppb (6) N/A 11.0 μg/m3 (46) 57.0
 
March 20, 2019, 7 a.m. 50.8 ppb (47) 13.0 ppb (12) N/A 38.0 ppb (35) N/A 0.0 ppb (0) 3.0 ppb (2) 0.44 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
March 20, 2019, 6 a.m. 32.8 ppb (30) 2.2 ppb (2) N/A 31.0 ppb (29) N/A 0.0 ppb (0) 14.0 ppb (11) 0.3 ppb (3) N/A 7.0 μg/m3 (29) 30.0
 
March 20, 2019, 5 a.m. 21.5 ppb (20) 0.4 ppb (0) N/A 21.0 ppb (19) N/A 0.0 ppb (0) 28.0 ppb (22) 0.26 ppb (3) N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 3 a.m. 21.6 ppb (20) 0.1 ppb (0) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 27.0 ppb (21) 0.29 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 2 a.m. 19.0 ppb (18) 0.0 ppb (0) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 30.0 ppb (23) 0.28 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
March 20, 2019, 1 a.m. 18.8 ppb (17) 0.0 ppb (0) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 33.0 ppb (25) 0.26 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 20, 2019, midnight 9.9 ppb (9) 0.0 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 43.0 ppb (33) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 33.0
 
March 19, 2019, 11 p.m. 5.6 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 48.0 ppb (37) 0.18 ppb (2) N/A 6.0 μg/m3 (25) 37.0
 
March 19, 2019, 10 p.m. 2.9 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 51.0 ppb (39) 0.16 ppb (2) N/A 9.0 μg/m3 (38) 39.0
 
March 19, 2019, 9 p.m. 2.4 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 53.0 ppb (41) 0.16 ppb (2) N/A 6.0 μg/m3 (25) 41.0
 
March 19, 2019, 8 p.m. 2.2 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 53.0 ppb (41) 0.16 ppb (2) N/A 3.0 μg/m3 (12) 41.0
 
March 19, 2019, 7 p.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 53.0 ppb (41) 0.15 ppb (2) N/A 3.0 μg/m3 (12) 41.0
 
March 19, 2019, 6 p.m. 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 53.0 ppb (41) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 41.0
 
March 19, 2019, 5 p.m. 2.2 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 52.0 ppb (40) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 40.0
 
March 19, 2019, 4 p.m. 2.0 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 51.0 ppb (39) 0.15 ppb (2) N/A 6.0 μg/m3 (25) 39.0
 
March 19, 2019, 3 p.m. 2.9 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 49.0 ppb (38) 0.16 ppb (2) N/A 6.0 μg/m3 (25) 38.0
 
March 19, 2019, 2 p.m. 3.2 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 48.0 ppb (37) 0.16 ppb (2) N/A 6.0 μg/m3 (25) 37.0
 
March 19, 2019, 1 p.m. 4.1 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) 0.17 ppb (2) N/A 6.0 μg/m3 (25) 36.0
 
March 19, 2019, noon 10.5 ppb (10) 1.9 ppb (2) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 40.0 ppb (31) 0.22 ppb (2) N/A 7.0 μg/m3 (29) 31.0
 
March 19, 2019, 11 a.m. 17.2 ppb (16) 1.2 ppb (1) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 32.0 ppb (25) 0.24 ppb (3) N/A 9.0 μg/m3 (38) 38.0
 
March 19, 2019, 10 a.m. 19.4 ppb (18) 0.1 ppb (0) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 29.0 ppb (22) 0.25 ppb (3) N/A 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 9 a.m. 12.9 ppb (12) 0.0 ppb (0) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 35.0 ppb (27) 0.21 ppb (2) N/A 6.0 μg/m3 (25) 27.0
 
March 19, 2019, 8 a.m. 20.8 ppb (19) 0.1 ppb (0) N/A 21.0 ppb (19) N/A 0.0 ppb (0) 27.0 ppb (21) 0.25 ppb (3) N/A 7.0 μg/m3 (29) 29.0
 
March 19, 2019, 7 a.m. 35.8 ppb (33) 0.9 ppb (1) N/A 35.0 ppb (32) N/A 0.0 ppb (0) N/A 0.44 ppb (5) N/A 9.0 μg/m3 (38) 38.0
 
March 19, 2019, 6 a.m. 39.2 ppb (36) 3.9 ppb (4) N/A 35.0 ppb (32) N/A 0.0 ppb (0) 7.0 ppb (5) 0.45 ppb (5) N/A 12.0 μg/m3 (50) 50.0
 
March 19, 2019, 5 a.m. 40.4 ppb (37) 3.8 ppb (4) N/A 37.0 ppb (34) N/A 0.0 ppb (0) 6.0 ppb (5) 0.43 ppb (5) N/A 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 3 a.m. 25.3 ppb (23) 0.0 ppb (0) N/A 25.0 ppb (23) N/A 0.0 ppb (0) 24.0 ppb (18) 0.32 ppb (4) N/A 9.0 μg/m3 (38) 38.0
 
March 19, 2019, 2 a.m. 18.1 ppb (17) 0.0 ppb (0) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 32.0 ppb (25) 0.23 ppb (3) N/A 5.0 μg/m3 (21) 25.0
 
March 19, 2019, 1 a.m. 9.5 ppb (9) 0.0 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 43.0 ppb (33) 0.21 ppb (2) N/A 7.0 μg/m3 (29) 33.0
 
March 19, 2019, midnight 9.1 ppb (8) 0.0 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 45.0 ppb (35) 0.2 ppb (2) N/A 3.0 μg/m3 (12) 35.0
 
March 18, 2019, 11 p.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 49.0 ppb (38) 0.18 ppb (2) N/A 3.0 μg/m3 (12) 38.0
 
March 18, 2019, 10 p.m. 2.7 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 52.0 ppb (40) 0.16 ppb (2) N/A 5.0 μg/m3 (21) 40.0
 
March 18, 2019, 9 p.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 53.0 ppb (41) 0.16 ppb (2) N/A 5.0 μg/m3 (21) 41.0
 
March 18, 2019, 8 p.m. 1.7 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 53.0 ppb (41) 0.16 ppb (2) N/A 1.0 μg/m3 (4) 41.0
 
March 18, 2019, 7 p.m. 1.7 ppb (2) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 53.0 ppb (41) 0.16 ppb (2) N/A 2.0 μg/m3 (8) 41.0
 
March 18, 2019, 6 p.m. 1.9 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 51.0 ppb (39) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 39.0
 
March 18, 2019, 5 p.m. 1.9 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 51.0 ppb (39) 0.16 ppb (2) N/A 3.0 μg/m3 (12) 39.0
 
March 18, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 3.0 μg/m3 (12) 38.0
 
March 18, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
March 18, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 2.0 μg/m3 (8) 37.0
 
March 18, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 3.0 μg/m3 (12) 35.0
 
March 18, 2019, noon 14.0 ppb (13) 2.9 ppb (3) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 37.0 ppb (28) 0.25 ppb (3) N/A 3.0 μg/m3 (12) 28.0
 
March 18, 2019, 11 a.m. 29.9 ppb (28) 4.3 ppb (4) N/A 26.0 ppb (24) N/A 1.0 ppb (1) 23.0 ppb (18) 0.33 ppb (4) N/A 4.0 μg/m3 (17) 28.0
 
March 18, 2019, 10 a.m. 47.9 ppb (44) 5.7 ppb (5) N/A 42.0 ppb (39) N/A 1.0 ppb (1) 6.0 ppb (5) 0.53 ppb (6) N/A 5.0 μg/m3 (21) 44.0
 
March 18, 2019, 9 a.m. 23.8 ppb (22) 0.2 ppb (0) N/A 24.0 ppb (22) N/A 0.0 ppb (0) 23.0 ppb (18) 0.27 ppb (3) N/A 4.0 μg/m3 (17) 22.0
 
March 18, 2019, 8 a.m. 11.7 ppb (11) 0.0 ppb (0) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 37.0 ppb (28) 0.19 ppb (2) N/A 4.0 μg/m3 (17) 28.0
 
March 18, 2019, 7 a.m. 10.3 ppb (10) 0.0 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 39.0 ppb (30) 0.18 ppb (2) N/A 1.0 μg/m3 (4) 30.0
 
March 18, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 2.0 μg/m3 (8) 34.0
 
March 18, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 2.0 μg/m3 (8) 37.0
 
March 18, 2019, 3 a.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (37) 0.16 ppb (2) N/A 2.0 μg/m3 (8) 37.0
 
March 18, 2019, 2 a.m. 2.2 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (37) 0.17 ppb (2) N/A 3.0 μg/m3 (12) 37.0
 
March 18, 2019, 1 a.m. 5.7 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 44.0 ppb (34) 0.2 ppb (2) N/A 5.0 μg/m3 (21) 34.0
 
March 18, 2019, midnight 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 45.0 ppb (35) 0.2 ppb (2) N/A 4.0 μg/m3 (17) 35.0
 
March 17, 2019, 11 p.m. 3.4 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 48.0 ppb (37) 0.18 ppb (2) N/A 2.0 μg/m3 (8) 37.0
 
March 17, 2019, 10 p.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 49.0 ppb (38) 0.17 ppb (2) N/A 5.0 μg/m3 (21) 38.0
 
March 17, 2019, 9 p.m. 1.3 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 51.0 ppb (39) 0.16 ppb (2) N/A 6.0 μg/m3 (25) 39.0
 
March 17, 2019, 8 p.m. 1.1 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 51.0 ppb (39) 0.16 ppb (2) N/A 6.0 μg/m3 (25) 39.0
 
March 17, 2019, 7 p.m. 1.1 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (38) 0.16 ppb (2) N/A 3.0 μg/m3 (12) 38.0
 
March 17, 2019, 6 p.m. 1.1 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 50.0 ppb (38) 0.16 ppb (2) N/A 1.0 μg/m3 (4) 38.0
 
March 17, 2019, 5 p.m. 1.2 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 49.0 ppb (38) 0.16 ppb (2) N/A 1.0 μg/m3 (4) 38.0
 
March 17, 2019, 4 p.m. 1.1 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) 0.15 ppb (2) N/A 3.0 μg/m3 (12) 37.0
 
March 17, 2019, 3 p.m. 1.3 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 48.0 ppb (37) 0.15 ppb (2) N/A 3.0 μg/m3 (12) 37.0
 
March 17, 2019, 2 p.m. 1.1 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) 0.15 ppb (2) N/A 0.0 μg/m3 (0) 36.0
 
March 17, 2019, 1 p.m. 1.4 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (36) 0.15 ppb (2) N/A 0.0 μg/m3 (0) 36.0
 
March 17, 2019, noon 1.9 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) 0.15 ppb (2) N/A 4.0 μg/m3 (17) 35.0
 
March 17, 2019, 11 a.m. 3.8 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 43.0 ppb (33) 0.16 ppb (2) N/A 4.0 μg/m3 (17) 33.0
 
March 17, 2019, 10 a.m. 3.7 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 43.0 ppb (33) 0.16 ppb (2) N/A -1.0 μg/m3 (0) 33.0
 
March 17, 2019, 9 a.m. 3.5 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 42.0 ppb (32) 0.15 ppb (2) N/A 0.0 μg/m3 (0) 32.0
 
March 17, 2019, 8 a.m. 4.6 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 40.0 ppb (31) 0.16 ppb (2) N/A 1.0 μg/m3 (4) 31.0
 
March 17, 2019, 7 a.m. 4.2 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 41.0 ppb (32) 0.16 ppb (2) N/A 3.0 μg/m3 (12) 32.0