AQSQID: 381010003

Site Name: Ryder

Location: Maryfield, ND

Reporting: True, Located: True

Current AQI: 37.0

Maryfield ND, US: 49.940861, -101.571583

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 24, 2019, 5 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) N/A 8.0 μg/m3 (7) 8.9 μg/m3 (37) 37.0
 
March 24, 2019, 4 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 29.0 ppb (22) N/A 8.0 μg/m3 (7) 5.6 μg/m3 (23) 23.0
 
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) 32.0 ppb (25) N/A 7.0 μg/m3 (6) 6.4 μg/m3 (27) 27.0
 
March 24, 2019, 2 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 7.0 μg/m3 (6) 7.4 μg/m3 (31) 31.0
 
March 24, 2019, 1 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 7.0 μg/m3 (6) 5.9 μg/m3 (25) 29.0
 
March 24, 2019, midnight 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (30) N/A 7.0 μg/m3 (6) 6.6 μg/m3 (28) 30.0
 
March 23, 2019, 11 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 8.0 μg/m3 (7) 6.8 μg/m3 (28) 32.0
 
March 23, 2019, 10 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) N/A 6.0 μg/m3 (5) 5.7 μg/m3 (24) 30.0
 
March 23, 2019, 9 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 7.0 μg/m3 (6) 5.5 μg/m3 (23) 32.0
 
March 23, 2019, 8 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 40.0 ppb (31) N/A 8.0 μg/m3 (7) 7.8 μg/m3 (32) 32.0
 
March 23, 2019, 7 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 3.0 ppb (4) 35.0 ppb (27) N/A 9.0 μg/m3 (8) 4.7 μg/m3 (20) 27.0
 
March 23, 2019, 6 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 36.0 ppb (28) N/A 8.0 μg/m3 (7) 3.3 μg/m3 (14) 28.0
 
March 23, 2019, 5 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 6.0 μg/m3 (5) 2.1 μg/m3 (9) 27.0
 
March 23, 2019, 4 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 6.0 μg/m3 (5) 2.0 μg/m3 (8) 26.0
 
March 23, 2019, 3 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 6.0 μg/m3 (5) 6.1 μg/m3 (25) 25.0
 
March 23, 2019, 2 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 5.0 μg/m3 (5) 5.2 μg/m3 (22) 25.0
 
March 23, 2019, 1 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 4.0 μg/m3 (4) 5.3 μg/m3 (22) 26.0
 
March 23, 2019, noon 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 4.0 μg/m3 (4) 3.7 μg/m3 (15) 27.0
 
March 23, 2019, 11 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 4.0 μg/m3 (4) 3.7 μg/m3 (15) 27.0
 
March 23, 2019, 10 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 4.0 μg/m3 (4) 1.4 μg/m3 (6) 29.0
 
March 23, 2019, 9 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A 3.0 μg/m3 (3) 4.2 μg/m3 (18) 30.0
 
March 23, 2019, 8 a.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 3.0 μg/m3 (3) 3.3 μg/m3 (14) 31.0
 
March 23, 2019, 7 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 4.0 μg/m3 (4) 2.8 μg/m3 (12) 31.0
 
March 23, 2019, 6 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 3.0 μg/m3 (3) 2.4 μg/m3 (10) 32.0
 
March 23, 2019, 5 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 3.0 μg/m3 (3) 1.3 μg/m3 (5) 33.0
 
March 23, 2019, 4 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 3.0 μg/m3 (3) -1.0 μg/m3 (0) 33.0
 
March 23, 2019, 3 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 3.0 μg/m3 (3) 0.3 μg/m3 (1) 33.0
 
March 23, 2019, 2 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 3.0 μg/m3 (3) 2.1 μg/m3 (9) 35.0
 
March 23, 2019, 1 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 4.0 μg/m3 (4) 2.4 μg/m3 (10) 35.0
 
March 23, 2019, midnight 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (37) N/A 5.0 μg/m3 (5) 3.4 μg/m3 (14) 37.0
 
March 22, 2019, 11 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 48.0 ppb (37) N/A 5.0 μg/m3 (5) 3.8 μg/m3 (16) 37.0
 
March 22, 2019, 10 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) N/A 4.0 μg/m3 (4) 3.2 μg/m3 (13) 38.0
 
March 22, 2019, 9 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 50.0 ppb (38) N/A 4.0 μg/m3 (4) 3.6 μg/m3 (15) 38.0
 
March 22, 2019, 8 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 5.0 μg/m3 (5) 1.2 μg/m3 (5) 36.0
 
March 22, 2019, 7 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 48.0 ppb (37) N/A 4.0 μg/m3 (4) 2.0 μg/m3 (8) 37.0
 
March 22, 2019, 6 p.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 45.0 ppb (35) N/A 4.0 μg/m3 (4) 3.0 μg/m3 (12) 35.0
 
March 22, 2019, 5 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 45.0 ppb (35) N/A 4.0 μg/m3 (4) 0.9 μg/m3 (4) 35.0
 
March 22, 2019, 4 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 4.0 μg/m3 (4) 4.7 μg/m3 (20) 35.0
 
March 22, 2019, 3 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 4.0 μg/m3 (4) 8.1 μg/m3 (34) 34.0
 
March 22, 2019, 2 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 5.0 μg/m3 (5) 9.1 μg/m3 (38) 38.0
 
March 22, 2019, 1 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 4.0 μg/m3 (4) 7.0 μg/m3 (29) 31.0
 
March 22, 2019, noon 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 4.0 μg/m3 (4) 6.4 μg/m3 (27) 33.0
 
March 22, 2019, 11 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 5.0 μg/m3 (5) 8.1 μg/m3 (34) 34.0
 
March 22, 2019, 10 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 5.0 μg/m3 (5) 10.2 μg/m3 (42) 42.0
 
March 22, 2019, 9 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 7.0 μg/m3 (6) 9.1 μg/m3 (38) 38.0
 
March 22, 2019, 8 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 9.0 μg/m3 (8) 5.4 μg/m3 (23) 35.0
 
March 22, 2019, 7 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 5.0 μg/m3 (5) 7.4 μg/m3 (31) 36.0
 
March 22, 2019, 6 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 5.0 μg/m3 (5) 8.3 μg/m3 (35) 36.0
 
March 22, 2019, 5 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 7.0 μg/m3 (6) 10.7 μg/m3 (45) 45.0
 
March 22, 2019, 4 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 7.0 μg/m3 (6) 12.1 μg/m3 (50) 50.0
 
March 22, 2019, 3 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 8.0 μg/m3 (7) 9.6 μg/m3 (40) 40.0
 
March 22, 2019, 2 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 8.0 μg/m3 (7) 7.1 μg/m3 (30) 32.0
 
March 22, 2019, 1 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 6.0 μg/m3 (5) 10.9 μg/m3 (45) 45.0
 
March 22, 2019, midnight 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 8.0 μg/m3 (7) 10.9 μg/m3 (45) 45.0
 
March 21, 2019, 11 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 48.0 ppb (37) N/A 8.0 μg/m3 (7) 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 10 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 51.0 ppb (39) N/A 9.0 μg/m3 (8) 10.4 μg/m3 (43) 43.0
 
March 21, 2019, 9 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 52.0 ppb (40) N/A 10.0 μg/m3 (9) 7.4 μg/m3 (31) 40.0
 
March 21, 2019, 8 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 52.0 ppb (40) N/A 9.0 μg/m3 (8) 5.8 μg/m3 (24) 40.0
 
March 21, 2019, 7 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 50.0 ppb (38) N/A 9.0 μg/m3 (8) 5.9 μg/m3 (25) 38.0
 
March 21, 2019, 6 p.m. 5.0 ppb (5) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 50.0 ppb (38) N/A 8.0 μg/m3 (7) 5.2 μg/m3 (22) 38.0
 
March 21, 2019, 5 p.m. 6.0 ppb (6) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 47.0 ppb (36) N/A 8.0 μg/m3 (7) 7.9 μg/m3 (33) 36.0
 
March 21, 2019, 4 p.m. 8.0 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 43.0 ppb (33) N/A 7.0 μg/m3 (6) 8.8 μg/m3 (37) 37.0
 
March 21, 2019, 3 p.m. 10.0 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 7.0 μg/m3 (6) 9.6 μg/m3 (40) 40.0
 
March 21, 2019, 2 p.m. 11.0 ppb (10) 2.0 ppb (2) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 6.0 μg/m3 (5) 12.5 μg/m3 (51) 51.0
 
March 21, 2019, 1 p.m. 11.0 ppb (10) 0.0 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 7.0 μg/m3 (6) 15.7 μg/m3 (58) 58.0
 
March 21, 2019, noon 11.0 ppb (10) 0.0 ppb (0) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 29.0 ppb (22) N/A 6.0 μg/m3 (5) 17.8 μg/m3 (62) 62.0
 
March 21, 2019, 11 a.m. 10.0 ppb (9) 0.0 ppb (0) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 6.0 μg/m3 (5) 17.6 μg/m3 (62) 62.0
 
March 21, 2019, 10 a.m. 9.0 ppb (8) 0.0 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 7.0 μg/m3 (6) 14.9 μg/m3 (56) 56.0
 
March 21, 2019, 9 a.m. 8.0 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 6.0 μg/m3 (5) 18.3 μg/m3 (63) 63.0
 
March 21, 2019, 8 a.m. 8.0 ppb (7) 0.0 ppb (0) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 7.0 μg/m3 (6) 16.7 μg/m3 (60) 60.0
 
March 21, 2019, 7 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 7.0 μg/m3 (6) 12.0 μg/m3 (50) 50.0
 
March 21, 2019, 6 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 7.0 μg/m3 (6) 12.2 μg/m3 (50) 50.0
 
March 21, 2019, 5 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 48.0 ppb (37) N/A 9.0 μg/m3 (8) 17.3 μg/m3 (61) 61.0
 
March 21, 2019, 4 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 53.0 ppb (41) N/A 9.0 μg/m3 (8) 13.3 μg/m3 (53) 53.0
 
March 21, 2019, 3 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 54.0 ppb (42) N/A 9.0 μg/m3 (8) 13.8 μg/m3 (54) 54.0
 
March 21, 2019, 2 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 55.0 ppb (42) N/A 10.0 μg/m3 (9) 11.2 μg/m3 (47) 47.0
 
March 21, 2019, 1 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 57.0 ppb (44) N/A 10.0 μg/m3 (9) 9.1 μg/m3 (38) 44.0
 
March 21, 2019, midnight 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 59.0 ppb (45) N/A 10.0 μg/m3 (9) 6.6 μg/m3 (28) 45.0
 
March 20, 2019, 11 p.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 62.0 ppb (48) N/A 9.0 μg/m3 (8) 7.9 μg/m3 (33) 48.0
 
March 20, 2019, 10 p.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 62.0 ppb (48) N/A 9.0 μg/m3 (8) 5.9 μg/m3 (25) 48.0
 
March 20, 2019, 9 p.m. 5.0 ppb (5) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 61.0 ppb (47) N/A 8.0 μg/m3 (7) 6.4 μg/m3 (27) 47.0
 
March 20, 2019, 8 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 56.0 ppb (43) N/A 7.0 μg/m3 (6) 9.6 μg/m3 (40) 43.0
 
March 20, 2019, 7 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 53.0 ppb (41) N/A 7.0 μg/m3 (6) 9.1 μg/m3 (38) 41.0
 
March 20, 2019, 6 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 48.0 ppb (37) N/A 8.0 μg/m3 (7) 4.5 μg/m3 (19) 37.0
 
March 20, 2019, 5 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 8.0 μg/m3 (7) 5.4 μg/m3 (23) 36.0
 
March 20, 2019, 4 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 7.0 μg/m3 (6) 6.0 μg/m3 (25) 35.0
 
March 20, 2019, 3 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 8.0 μg/m3 (7) 5.4 μg/m3 (23) 33.0
 
March 20, 2019, 2 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 7.0 μg/m3 (6) 6.8 μg/m3 (28) 31.0
 
March 20, 2019, 1 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 6.0 μg/m3 (5) 10.0 μg/m3 (42) 42.0
 
March 20, 2019, noon 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 39.0 ppb (30) N/A 7.0 μg/m3 (6) 7.6 μg/m3 (32) 32.0
 
March 20, 2019, 11 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 5.0 μg/m3 (5) 11.1 μg/m3 (46) 46.0
 
March 20, 2019, 10 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 6.0 μg/m3 (5) 5.2 μg/m3 (22) 31.0
 
March 20, 2019, 9 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 5.0 μg/m3 (5) 3.2 μg/m3 (13) 32.0
 
March 20, 2019, 8 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 5.0 μg/m3 (5) 4.6 μg/m3 (19) 32.0
 
March 20, 2019, 7 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 6.0 μg/m3 (5) 7.9 μg/m3 (33) 33.0
 
March 20, 2019, 6 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 5.0 μg/m3 (5) 6.7 μg/m3 (28) 33.0
 
March 20, 2019, 5 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 6.0 μg/m3 (5) 7.7 μg/m3 (32) 33.0
 
March 20, 2019, 4 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 5.0 μg/m3 (5) 8.2 μg/m3 (34) 34.0
 
March 20, 2019, 3 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) N/A 5.0 μg/m3 (5) 6.7 μg/m3 (28) 34.0
 
March 20, 2019, 2 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 5.0 μg/m3 (5) 7.1 μg/m3 (30) 35.0
 
March 20, 2019, 1 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 5.0 μg/m3 (5) 2.1 μg/m3 (9) 36.0
 
March 20, 2019, midnight 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 49.0 ppb (38) N/A 4.0 μg/m3 (4) 3.6 μg/m3 (15) 38.0
 
March 19, 2019, 11 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 51.0 ppb (39) N/A 3.0 μg/m3 (3) 6.3 μg/m3 (26) 39.0
 
March 19, 2019, 10 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 54.0 ppb (42) N/A 9.0 μg/m3 (8) 7.6 μg/m3 (32) 42.0
 
March 19, 2019, 9 p.m. 5.0 ppb (5) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 55.0 ppb (42) N/A 8.0 μg/m3 (7) 6.9 μg/m3 (29) 42.0
 
March 19, 2019, 8 p.m. 8.0 ppb (7) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 51.0 ppb (39) N/A 5.0 μg/m3 (5) 7.6 μg/m3 (32) 39.0
 
March 19, 2019, 7 p.m. 11.0 ppb (10) 2.0 ppb (2) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 49.0 ppb (38) N/A 5.0 μg/m3 (5) 10.4 μg/m3 (43) 43.0
 
March 19, 2019, 6 p.m. 10.0 ppb (9) 2.0 ppb (2) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 49.0 ppb (38) N/A 6.0 μg/m3 (5) 9.3 μg/m3 (39) 39.0
 
March 19, 2019, 5 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 7.0 μg/m3 (6) 9.7 μg/m3 (40) 40.0
 
March 19, 2019, 4 p.m. 7.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 43.0 ppb (33) N/A 7.0 μg/m3 (6) 7.1 μg/m3 (30) 33.0
 
March 19, 2019, 3 p.m. 8.0 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 40.0 ppb (31) N/A 6.0 μg/m3 (5) 8.6 μg/m3 (36) 36.0
 
March 19, 2019, 2 p.m. 7.0 ppb (6) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 39.0 ppb (30) N/A 8.0 μg/m3 (7) 9.6 μg/m3 (40) 40.0
 
March 19, 2019, 1 p.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 40.0 ppb (31) N/A 6.0 μg/m3 (5) 7.4 μg/m3 (31) 31.0
 
March 19, 2019, noon 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 42.0 ppb (32) N/A 6.0 μg/m3 (5) 11.1 μg/m3 (46) 46.0
 
March 19, 2019, 11 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 43.0 ppb (33) N/A 5.0 μg/m3 (5) 11.8 μg/m3 (49) 49.0
 
March 19, 2019, 10 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 43.0 ppb (33) N/A 6.0 μg/m3 (5) 6.1 μg/m3 (25) 33.0
 
March 19, 2019, 9 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 5.0 μg/m3 (5) 8.9 μg/m3 (37) 37.0
 
March 19, 2019, 8 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 6.0 μg/m3 (5) 7.8 μg/m3 (32) 32.0
 
March 19, 2019, 7 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 6.0 μg/m3 (5) 9.1 μg/m3 (38) 38.0
 
March 19, 2019, 6 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 6.0 μg/m3 (5) 11.8 μg/m3 (49) 49.0
 
March 19, 2019, 5 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 42.0 ppb (32) N/A 7.0 μg/m3 (6) 8.1 μg/m3 (34) 34.0
 
March 19, 2019, 4 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 6.0 μg/m3 (5) 3.1 μg/m3 (13) 33.0
 
March 19, 2019, 3 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) N/A 6.0 μg/m3 (5) 4.7 μg/m3 (20) 34.0
 
March 19, 2019, 2 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) N/A 6.0 μg/m3 (5) 7.2 μg/m3 (30) 34.0
 
March 19, 2019, 1 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 5.0 μg/m3 (5) 6.9 μg/m3 (29) 35.0
 
March 19, 2019, midnight 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 6.0 μg/m3 (5) 3.1 μg/m3 (13) 35.0
 
March 18, 2019, 11 p.m. 5.0 ppb (5) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 6.0 μg/m3 (5) 4.9 μg/m3 (20) 36.0
 
March 18, 2019, 10 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 50.0 ppb (38) N/A 7.0 μg/m3 (6) 6.5 μg/m3 (27) 38.0
 
March 18, 2019, 9 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 51.0 ppb (39) N/A 6.0 μg/m3 (5) 2.1 μg/m3 (9) 39.0
 
March 18, 2019, 8 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 51.0 ppb (39) N/A 5.0 μg/m3 (5) 0.5 μg/m3 (2) 39.0
 
March 18, 2019, 7 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 51.0 ppb (39) N/A 4.0 μg/m3 (4) 0.8 μg/m3 (3) 39.0
 
March 18, 2019, 6 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 51.0 ppb (39) N/A 5.0 μg/m3 (5) 2.0 μg/m3 (8) 39.0
 
March 18, 2019, 5 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 50.0 ppb (38) N/A 6.0 μg/m3 (5) 3.1 μg/m3 (13) 38.0
 
March 18, 2019, 4 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 49.0 ppb (38) N/A 3.0 μg/m3 (3) 5.3 μg/m3 (22) 38.0
 
March 18, 2019, 3 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (37) N/A 4.0 μg/m3 (4) 1.6 μg/m3 (7) 37.0
 
March 18, 2019, 2 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 3.0 μg/m3 (3) 0.4 μg/m3 (2) 36.0
 
March 18, 2019, 1 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 3.0 μg/m3 (3) 4.3 μg/m3 (18) 35.0
 
March 18, 2019, noon 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 1.0 μg/m3 (1) 5.0 μg/m3 (21) 35.0
 
March 18, 2019, 11 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 3.0 μg/m3 (3) 4.9 μg/m3 (20) 32.0
 
March 18, 2019, 10 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 41.0 ppb (32) N/A 3.0 μg/m3 (3) 7.2 μg/m3 (30) 32.0
 
March 18, 2019, 9 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 42.0 ppb (32) N/A 4.0 μg/m3 (4) 7.3 μg/m3 (30) 32.0
 
March 18, 2019, 8 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 4.0 μg/m3 (4) 7.2 μg/m3 (30) 33.0
 
March 18, 2019, 7 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 4.0 μg/m3 (4) 10.2 μg/m3 (42) 42.0
 
March 18, 2019, 6 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 49.0 ppb (38) N/A 4.0 μg/m3 (4) 4.4 μg/m3 (18) 38.0
 
March 18, 2019, 5 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 51.0 ppb (39) N/A 5.0 μg/m3 (5) 6.3 μg/m3 (26) 39.0
 
March 18, 2019, 4 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 52.0 ppb (40) N/A 5.0 μg/m3 (5) 6.8 μg/m3 (28) 40.0
 
March 18, 2019, 3 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 52.0 ppb (40) N/A 5.0 μg/m3 (5) 8.5 μg/m3 (35) 40.0
 
March 18, 2019, 2 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 54.0 ppb (42) N/A 6.0 μg/m3 (5) 7.3 μg/m3 (30) 42.0
 
March 18, 2019, 1 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 56.0 ppb (43) N/A 6.0 μg/m3 (5) 7.6 μg/m3 (32) 43.0
 
March 18, 2019, midnight 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 60.0 ppb (46) N/A 7.0 μg/m3 (6) 9.5 μg/m3 (40) 46.0
 
March 17, 2019, 11 p.m. 6.0 ppb (6) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 62.0 ppb (48) N/A 8.0 μg/m3 (7) 6.0 μg/m3 (25) 48.0
 
March 17, 2019, 10 p.m. 6.0 ppb (6) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 62.0 ppb (48) N/A 8.0 μg/m3 (7) 5.5 μg/m3 (23) 48.0
 
March 17, 2019, 9 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 62.0 ppb (48) N/A 7.0 μg/m3 (6) 4.7 μg/m3 (20) 48.0
 
March 17, 2019, 8 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 2.0 ppb (3) 59.0 ppb (45) N/A 7.0 μg/m3 (6) 7.8 μg/m3 (32) 45.0
 
March 17, 2019, 7 p.m. 5.0 ppb (5) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 2.0 ppb (3) 58.0 ppb (45) N/A 7.0 μg/m3 (6) 5.1 μg/m3 (21) 45.0
 
March 17, 2019, 6 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 56.0 ppb (43) N/A 7.0 μg/m3 (6) 5.5 μg/m3 (23) 43.0
 
March 17, 2019, 5 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 52.0 ppb (40) N/A 6.0 μg/m3 (5) 5.7 μg/m3 (24) 40.0
 
March 17, 2019, 4 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 49.0 ppb (38) N/A 7.0 μg/m3 (6) 5.2 μg/m3 (22) 38.0
 
March 17, 2019, 3 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 47.0 ppb (36) N/A 6.0 μg/m3 (5) 4.4 μg/m3 (18) 36.0
 
March 17, 2019, 2 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 5.0 μg/m3 (5) 4.9 μg/m3 (20) 35.0
 
March 17, 2019, 1 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 5.0 μg/m3 (5) 4.8 μg/m3 (20) 36.0
 
March 17, 2019, noon 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 4.0 μg/m3 (4) 4.8 μg/m3 (20) 36.0
 
March 17, 2019, 11 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 4.0 μg/m3 (4) 8.1 μg/m3 (34) 36.0
 
March 17, 2019, 10 a.m. 5.0 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 4.0 μg/m3 (4) 8.2 μg/m3 (34) 35.0
 
March 17, 2019, 9 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 44.0 ppb (34) N/A 5.0 μg/m3 (5) 7.6 μg/m3 (32) 34.0
 
March 17, 2019, 8 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 6.0 μg/m3 (5) 6.8 μg/m3 (28) 35.0
 
March 17, 2019, 7 a.m. 7.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 6.0 μg/m3 (5) 5.6 μg/m3 (23) 36.0
 
March 17, 2019, 6 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 49.0 ppb (38) N/A 5.0 μg/m3 (5) 5.5 μg/m3 (23) 38.0