AQSQID: 380570004

Site Name: Beulah North

Location: Mercer Co, ND

Reporting: True, Located: True

Current AQI: 30.0

Mercer Co ND, US: 47.2986, -101.7669

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 25, 2019, 7 p.m. 1.8 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) 7.3 μg/m3 (30) 30.0
 
March 25, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
March 25, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A N/A 26.0
 
March 25, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A N/A 25.0
 
March 25, 2019, 3 p.m. 1.4 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 31.0 ppb (24) N/A 6.0 μg/m3 (5) 7.8 μg/m3 (32) 32.0
 
March 25, 2019, 2 p.m. 1.1 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 32.0 ppb (25) N/A 6.0 μg/m3 (5) 5.1 μg/m3 (21) 25.0
 
March 25, 2019, 1 p.m. 2.4 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 30.0 ppb (23) N/A 4.0 μg/m3 (4) 3.6 μg/m3 (15) 23.0
 
March 25, 2019, noon 1.1 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 32.0 ppb (25) N/A 5.0 μg/m3 (5) 3.7 μg/m3 (15) 25.0
 
March 25, 2019, 11 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 33.0 ppb (25) N/A 4.0 μg/m3 (4) 3.1 μg/m3 (13) 25.0
 
March 25, 2019, 10 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) N/A 4.0 μg/m3 (4) 4.6 μg/m3 (19) 26.0
 
March 25, 2019, 9 a.m. 1.0 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) N/A 4.0 μg/m3 (4) 5.6 μg/m3 (23) 26.0
 
March 25, 2019, 8 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 35.0 ppb (27) N/A 4.0 μg/m3 (4) 7.1 μg/m3 (30) 30.0
 
March 25, 2019, 7 a.m. 0.6 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 35.0 ppb (27) N/A 4.0 μg/m3 (4) 6.2 μg/m3 (26) 27.0
 
March 25, 2019, 6 a.m. 0.7 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 35.0 ppb (27) N/A 5.0 μg/m3 (5) 4.4 μg/m3 (18) 27.0
 
March 25, 2019, 5 a.m. 0.9 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) N/A 5.0 μg/m3 (5) 3.3 μg/m3 (14) 26.0
 
March 25, 2019, 4 a.m. 1.1 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) N/A 5.0 μg/m3 (5) 3.9 μg/m3 (16) 26.0
 
March 25, 2019, 3 a.m. 2.0 ppb (2) 0.6 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 33.0 ppb (25) N/A 5.0 μg/m3 (5) 5.6 μg/m3 (23) 25.0
 
March 25, 2019, 2 a.m. 1.0 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) N/A 5.0 μg/m3 (5) 4.3 μg/m3 (18) 26.0
 
March 25, 2019, 1 a.m. 1.6 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) N/A 5.0 μg/m3 (5) 3.0 μg/m3 (12) 26.0
 
March 25, 2019, midnight 1.1 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) N/A 6.0 μg/m3 (5) 3.9 μg/m3 (16) 26.0
 
March 24, 2019, 11 p.m. 2.1 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 34.0 ppb (26) N/A 7.0 μg/m3 (6) 3.9 μg/m3 (16) 26.0
 
March 24, 2019, 10 p.m. 2.1 ppb (2) 0.9 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 7.0 μg/m3 (6) 5.6 μg/m3 (23) 25.0
 
March 24, 2019, 9 p.m. 1.6 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 7.0 μg/m3 (6) 7.7 μg/m3 (32) 32.0
 
March 24, 2019, 8 p.m. 2.0 ppb (2) 0.8 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 9.0 μg/m3 (8) 8.7 μg/m3 (36) 36.0
 
March 24, 2019, 7 p.m. 3.0 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 32.0 ppb (25) N/A 9.0 μg/m3 (8) 12.4 μg/m3 (51) 51.0
 
March 24, 2019, 6 p.m. 3.3 ppb (3) 1.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 32.0 ppb (25) N/A 7.0 μg/m3 (6) 6.7 μg/m3 (28) 28.0
 
March 24, 2019, 5 p.m. 2.0 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 6.0 μg/m3 (5) 4.4 μg/m3 (18) 25.0
 
March 24, 2019, 4 p.m. 2.4 ppb (2) 1.1 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 33.0 ppb (25) N/A 4.0 μg/m3 (4) 3.3 μg/m3 (14) 25.0
 
March 24, 2019, 3 p.m. 1.2 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 4.0 μg/m3 (4) 3.4 μg/m3 (14) 24.0
 
March 24, 2019, 2 p.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 31.0 ppb (24) N/A 5.0 μg/m3 (5) 3.4 μg/m3 (14) 24.0
 
March 24, 2019, 1 p.m. 1.1 ppb (1) 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) 5.7 μg/m3 (24) 25.0
 
March 24, 2019, noon 1.6 ppb (1) 0.4 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 32.0 ppb (25) N/A 5.0 μg/m3 (5) 4.4 μg/m3 (18) 25.0
 
March 24, 2019, 11 a.m. 1.6 ppb (1) 0.2 ppb (0) N/A 1.0 ppb (1) N/A 1.0 ppb (1) 32.0 ppb (25) N/A 6.0 μg/m3 (5) 7.7 μg/m3 (32) 32.0
 
March 24, 2019, 10 a.m. 1.8 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 33.0 ppb (25) N/A 6.0 μg/m3 (5) 11.5 μg/m3 (48) 48.0
 
March 24, 2019, 9 a.m. 1.8 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 32.0 ppb (25) N/A 9.0 μg/m3 (8) 8.6 μg/m3 (36) 36.0
 
March 24, 2019, 8 a.m. 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 25.0 ppb (19) N/A 9.0 μg/m3 (8) 11.3 μg/m3 (47) 47.0
 
March 24, 2019, 7 a.m. 2.3 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 24.0 ppb (18) N/A 7.0 μg/m3 (6) 9.6 μg/m3 (40) 40.0
 
March 24, 2019, 6 a.m. 2.1 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 23.0 ppb (18) N/A 7.0 μg/m3 (6) 6.3 μg/m3 (26) 26.0
 
March 24, 2019, 5 a.m. 2.2 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 26.0 ppb (20) N/A 6.0 μg/m3 (5) 7.1 μg/m3 (30) 30.0
 
March 24, 2019, 4 a.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 26.0 ppb (20) N/A N/A 10.4 μg/m3 (43) 43.0
 
March 24, 2019, 3 a.m. 2.2 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 28.0 ppb (22) N/A 9.0 μg/m3 (8) 9.1 μg/m3 (38) 38.0
 
March 24, 2019, 2 a.m. 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 28.0 ppb (22) N/A 9.0 μg/m3 (8) 7.4 μg/m3 (31) 31.0
 
March 24, 2019, 1 a.m. 2.8 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 10.0 μg/m3 (9) 8.5 μg/m3 (35) 35.0
 
March 24, 2019, midnight 3.0 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 39.0 ppb (30) N/A 8.0 μg/m3 (7) 5.7 μg/m3 (24) 30.0
 
March 23, 2019, 11 p.m. 3.0 ppb (3) 0.2 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) 5.1 μg/m3 (21) 34.0
 
March 23, 2019, 10 p.m. 3.0 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 7.0 μg/m3 (6) 7.6 μg/m3 (32) 35.0
 
March 23, 2019, 9 p.m. 3.2 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 45.0 ppb (35) N/A 7.0 μg/m3 (6) 8.6 μg/m3 (36) 36.0
 
March 23, 2019, 8 p.m. 3.3 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 42.0 ppb (32) N/A 9.0 μg/m3 (8) 5.2 μg/m3 (22) 32.0
 
March 23, 2019, 7 p.m. 3.8 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A 2.0 ppb (3) 40.0 ppb (31) N/A 7.0 μg/m3 (6) 7.6 μg/m3 (32) 32.0
 
March 23, 2019, 6 p.m. 7.2 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 6.0 ppb (9) 34.0 ppb (26) N/A 9.0 μg/m3 (8) 6.1 μg/m3 (25) 26.0
 
March 23, 2019, 5 p.m. 11.7 ppb (11) 4.8 ppb (4) N/A 7.0 ppb (6) N/A 11.0 ppb (16) 31.0 ppb (24) N/A 9.0 μg/m3 (8) 2.6 μg/m3 (11) 24.0
 
March 23, 2019, 4 p.m. 2.4 ppb (2) 0.3 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 8.0 μg/m3 (7) 5.3 μg/m3 (22) 25.0
 
March 23, 2019, 3 p.m. 2.1 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 5.0 μg/m3 (5) 6.9 μg/m3 (29) 29.0
 
March 23, 2019, 2 p.m. 1.6 ppb (1) 0.1 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 31.0 ppb (24) N/A 5.0 μg/m3 (5) 4.5 μg/m3 (19) 24.0
 
March 23, 2019, 1 p.m. 2.1 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 30.0 ppb (23) N/A 5.0 μg/m3 (5) 4.1 μg/m3 (17) 23.0
 
March 23, 2019, noon 3.6 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (25) N/A 5.0 μg/m3 (5) 6.6 μg/m3 (28) 28.0
 
March 23, 2019, 11 a.m. 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 34.0 ppb (26) N/A 5.0 μg/m3 (5) 5.9 μg/m3 (25) 26.0
 
March 23, 2019, 10 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) N/A 4.0 μg/m3 (4) 7.0 μg/m3 (29) 29.0
 
March 23, 2019, 9 a.m. 1.8 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) 7.4 μg/m3 (31) 31.0
 
March 23, 2019, 8 a.m. 1.6 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 4.0 μg/m3 (4) 5.0 μg/m3 (21) 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) 38.0 ppb (29) N/A 4.0 μg/m3 (4) 4.5 μg/m3 (19) 29.0
 
March 23, 2019, 6 a.m. 2.2 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (30) N/A 3.0 μg/m3 (3) 3.0 μg/m3 (12) 30.0
 
March 23, 2019, 5 a.m. 1.3 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 3.0 μg/m3 (3) 4.8 μg/m3 (20) 29.0
 
March 23, 2019, 4 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A 4.0 μg/m3 (4) 5.6 μg/m3 (23) 30.0
 
March 23, 2019, 3 a.m. 1.5 ppb (1) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (28) N/A 5.0 μg/m3 (5) 4.2 μg/m3 (18) 28.0
 
March 23, 2019, 2 a.m. 1.7 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 39.0 ppb (30) N/A 4.0 μg/m3 (4) 5.1 μg/m3 (21) 30.0
 
March 23, 2019, 1 a.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (31) N/A 8.0 μg/m3 (7) 3.9 μg/m3 (16) 31.0
 
March 23, 2019, midnight 2.3 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) 41.0 ppb (32) N/A 8.0 μg/m3 (7) 0.7 μg/m3 (3) 32.0
 
March 22, 2019, 11 p.m. 1.7 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 4.0 μg/m3 (4) 2.9 μg/m3 (12) 35.0
 
March 22, 2019, 10 p.m. 1.9 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 5.0 μg/m3 (5) 4.6 μg/m3 (19) 35.0
 
March 22, 2019, 9 p.m. 2.1 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (36) N/A 4.0 μg/m3 (4) 4.0 μg/m3 (17) 36.0
 
March 22, 2019, 8 p.m. 2.1 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) 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 22, 2019, 7 p.m. 2.1 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 5.0 μg/m3 (5) 2.8 μg/m3 (12) 35.0
 
March 22, 2019, 6 p.m. 2.2 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (35) N/A 5.0 μg/m3 (5) 5.8 μg/m3 (24) 35.0
 
March 22, 2019, 5 p.m. 2.3 ppb (2) 0.1 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) 4.6 μg/m3 (19) 35.0
 
March 22, 2019, 4 p.m. 2.4 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 45.0 ppb (35) N/A 6.0 μg/m3 (5) 5.7 μg/m3 (24) 35.0
 
March 22, 2019, 3 p.m. 2.5 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (33) N/A 6.0 μg/m3 (5) 9.8 μg/m3 (41) 41.0
 
March 22, 2019, 2 p.m. 2.6 ppb (2) 0.2 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) 7.1 μg/m3 (30) 30.0
 
March 22, 2019, 1 p.m. 3.7 ppb (3) 0.2 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 37.0 ppb (28) N/A 6.0 μg/m3 (5) 5.6 μg/m3 (23) 28.0
 
March 22, 2019, noon 9.9 ppb (9) 1.6 ppb (1) N/A 8.0 ppb (7) N/A 1.0 ppb (1) 30.0 ppb (23) N/A 5.0 μg/m3 (5) 8.5 μg/m3 (35) 35.0
 
March 22, 2019, 11 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 38.0 ppb (29) N/A 5.0 μg/m3 (5) 9.7 μg/m3 (40) 40.0
 
March 22, 2019, 10 a.m. 3.2 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 40.0 ppb (31) N/A 5.0 μg/m3 (5) 8.9 μg/m3 (37) 37.0
 
March 22, 2019, 9 a.m. 2.7 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 5.0 μg/m3 (5) 9.3 μg/m3 (39) 39.0
 
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) 38.0 ppb (29) N/A 6.0 μg/m3 (5) 8.4 μg/m3 (35) 35.0
 
March 22, 2019, 7 a.m. 2.6 ppb (2) 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) 9.3 μg/m3 (39) 39.0
 
March 22, 2019, 6 a.m. 2.9 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 38.0 ppb (29) N/A 9.0 μg/m3 (8) 11.8 μg/m3 (49) 49.0
 
March 22, 2019, 5 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 37.0 ppb (28) N/A 11.0 μg/m3 (10) 7.6 μg/m3 (32) 32.0
 
March 22, 2019, 4 a.m. 3.4 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (28) N/A 10.0 μg/m3 (9) 9.8 μg/m3 (41) 41.0
 
March 22, 2019, 3 a.m. 3.1 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 34.0 ppb (26) N/A 9.0 μg/m3 (8) 9.0 μg/m3 (38) 38.0
 
March 22, 2019, 2 a.m. 4.0 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (27) N/A 10.0 μg/m3 (9) 9.4 μg/m3 (39) 39.0
 
March 22, 2019, 1 a.m. 4.4 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (29) N/A 11.0 μg/m3 (10) 10.2 μg/m3 (42) 42.0
 
March 22, 2019, midnight 7.5 ppb (7) 1.5 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 42.0 ppb (32) N/A 13.0 μg/m3 (12) 15.2 μg/m3 (57) 57.0
 
March 21, 2019, 11 p.m. 7.3 ppb (7) 1.2 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 49.0 ppb (38) N/A 11.0 μg/m3 (10) 11.8 μg/m3 (49) 49.0
 
March 21, 2019, 10 p.m. 5.6 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 53.0 ppb (41) N/A 12.0 μg/m3 (11) 10.8 μg/m3 (45) 45.0
 
March 21, 2019, 9 p.m. 7.9 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 53.0 ppb (41) N/A 10.0 μg/m3 (9) 11.4 μg/m3 (48) 48.0
 
March 21, 2019, 8 p.m. 6.5 ppb (6) 1.4 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 53.0 ppb (41) N/A 12.0 μg/m3 (11) 12.1 μg/m3 (50) 50.0
 
March 21, 2019, 7 p.m. 8.6 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 48.0 ppb (37) N/A 11.0 μg/m3 (10) 10.2 μg/m3 (42) 42.0
 
March 21, 2019, 6 p.m. 10.4 ppb (10) 3.2 ppb (3) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 45.0 ppb (35) N/A 9.0 μg/m3 (8) 7.3 μg/m3 (30) 35.0
 
March 21, 2019, 5 p.m. 9.3 ppb (9) 2.6 ppb (2) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 45.0 ppb (35) N/A 10.0 μg/m3 (9) 6.9 μg/m3 (29) 35.0
 
March 21, 2019, 4 p.m. 10.5 ppb (10) 3.4 ppb (3) N/A 7.0 ppb (6) N/A 1.0 ppb (1) 38.0 ppb (29) N/A 8.0 μg/m3 (7) 7.8 μg/m3 (32) 32.0
 
March 21, 2019, 3 p.m. 6.5 ppb (6) 1.8 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 31.0 ppb (24) N/A 7.0 μg/m3 (6) 9.1 μg/m3 (38) 38.0
 
March 21, 2019, 2 p.m. 3.9 ppb (4) 0.5 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 30.0 ppb (23) N/A 8.0 μg/m3 (7) 8.2 μg/m3 (34) 34.0
 
March 21, 2019, 1 p.m. 3.9 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 27.0 ppb (21) N/A 6.0 μg/m3 (5) 10.5 μg/m3 (44) 44.0
 
March 21, 2019, noon 5.1 ppb (5) 0.7 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 29.0 ppb (22) N/A 6.0 μg/m3 (5) 9.1 μg/m3 (38) 38.0
 
March 21, 2019, 11 a.m. 3.9 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 25.0 ppb (19) N/A 5.0 μg/m3 (5) 8.8 μg/m3 (37) 37.0
 
March 21, 2019, 10 a.m. 3.7 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 25.0 ppb (19) N/A 5.0 μg/m3 (5) 8.5 μg/m3 (35) 35.0
 
March 21, 2019, 9 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 25.0 ppb (19) N/A 6.0 μg/m3 (5) 8.8 μg/m3 (37) 37.0
 
March 21, 2019, 8 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) N/A 6.0 μg/m3 (5) 9.6 μg/m3 (40) 40.0
 
March 21, 2019, 7 a.m. 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 27.0 ppb (21) N/A 6.0 μg/m3 (5) 13.3 μg/m3 (53) 53.0
 
March 21, 2019, 6 a.m. 4.1 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 31.0 ppb (24) N/A 8.0 μg/m3 (7) 11.7 μg/m3 (49) 49.0
 
March 21, 2019, 5 a.m. 6.2 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 34.0 ppb (26) N/A 10.0 μg/m3 (9) 18.0 μg/m3 (63) 63.0
 
March 21, 2019, 4 a.m. 7.7 ppb (7) 0.1 ppb (0) N/A 8.0 ppb (7) N/A 1.0 ppb (1) 41.0 ppb (32) N/A 10.0 μg/m3 (9) 13.6 μg/m3 (53) 53.0
 
March 21, 2019, 3 a.m. 6.3 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) 49.0 ppb (38) N/A 10.0 μg/m3 (9) 11.2 μg/m3 (47) 47.0
 
March 21, 2019, 2 a.m. 5.7 ppb (5) 0.1 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (9) 10.8 μg/m3 (45) 45.0
 
March 21, 2019, 1 a.m. 7.3 ppb (7) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 18.0 μg/m3 (16) 19.2 μg/m3 (65) 65.0
 
March 21, 2019, midnight 9.9 ppb (9) 0.8 ppb (1) N/A 9.0 ppb (8) N/A 1.0 ppb (1) N/A N/A 14.0 μg/m3 (13) 11.6 μg/m3 (48) 48.0
 
March 20, 2019, 11 p.m. 8.4 ppb (8) 0.9 ppb (1) N/A 7.0 ppb (6) N/A 2.0 ppb (3) N/A N/A 14.0 μg/m3 (13) 10.5 μg/m3 (44) 44.0
 
March 20, 2019, 10 p.m. 9.4 ppb (9) 1.9 ppb (2) N/A 8.0 ppb (7) N/A 2.0 ppb (3) N/A N/A 13.0 μg/m3 (12) 14.0 μg/m3 (54) 54.0
 
March 20, 2019, 9 p.m. 13.4 ppb (12) 3.6 ppb (3) N/A 10.0 ppb (9) N/A 5.0 ppb (7) 51.0 ppb (39) N/A 11.0 μg/m3 (10) 12.8 μg/m3 (52) 52.0
 
March 20, 2019, 8 p.m. 10.2 ppb (9) 2.5 ppb (2) N/A 8.0 ppb (7) N/A 2.0 ppb (3) 53.0 ppb (41) N/A 9.0 μg/m3 (8) 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 7 p.m. 12.6 ppb (12) 4.0 ppb (4) N/A 9.0 ppb (8) N/A 4.0 ppb (6) 47.0 ppb (36) N/A 17.0 μg/m3 (15) 10.4 μg/m3 (43) 43.0
 
March 20, 2019, 6 p.m. 18.2 ppb (17) 7.8 ppb (7) N/A 10.0 ppb (9) N/A 8.0 ppb (11) 41.0 ppb (32) N/A 9.0 μg/m3 (8) 9.1 μg/m3 (38) 38.0
 
March 20, 2019, 5 p.m. 6.7 ppb (6) 1.7 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (1) 45.0 ppb (35) N/A 10.0 μg/m3 (9) 10.2 μg/m3 (42) 42.0
 
March 20, 2019, 4 p.m. 6.6 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 2.0 ppb (3) 42.0 ppb (32) N/A 10.0 μg/m3 (9) 12.6 μg/m3 (51) 51.0
 
March 20, 2019, 3 p.m. 6.3 ppb (6) 1.9 ppb (2) N/A 4.0 ppb (4) N/A 2.0 ppb (3) N/A N/A 10.0 μg/m3 (9) 14.8 μg/m3 (56) 56.0
 
March 20, 2019, 2 p.m. 9.8 ppb (9) 2.2 ppb (2) N/A 8.0 ppb (7) N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (9) 12.6 μg/m3 (51) 51.0
 
March 20, 2019, 1 p.m. 8.7 ppb (8) 1.6 ppb (1) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) 15.1 μg/m3 (57) 57.0
 
March 20, 2019, noon 8.1 ppb (8) 1.4 ppb (1) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) 11.9 μg/m3 (50) 50.0
 
March 20, 2019, 11 a.m. 6.7 ppb (6) 0.9 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) 15.0 μg/m3 (56) 56.0
 
March 20, 2019, 10 a.m. 7.9 ppb (7) 0.7 ppb (1) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) 10.9 μg/m3 (45) 45.0
 
March 20, 2019, 9 a.m. 7.0 ppb (6) 0.1 ppb (0) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) 9.3 μg/m3 (39) 39.0
 
March 20, 2019, 8 a.m. 5.2 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (5) 5.8 μg/m3 (24) 24.0
 
March 20, 2019, 7 a.m. 4.0 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (5) 5.8 μg/m3 (24) 24.0
 
March 20, 2019, 6 a.m. 3.2 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 5.0 μg/m3 (5) 4.9 μg/m3 (20) 20.0
 
March 20, 2019, 5 a.m. 2.8 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 4.0 μg/m3 (4) 4.7 μg/m3 (20) 20.0
 
March 20, 2019, 4 a.m. 2.2 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A 3.0 μg/m3 (3) 4.3 μg/m3 (18) 18.0
 
March 20, 2019, 3 a.m. 2.4 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A 4.0 μg/m3 (4) 4.2 μg/m3 (18) 18.0
 
March 20, 2019, 2 a.m. 2.2 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A 5.0 μg/m3 (5) 4.7 μg/m3 (20) 20.0
 
March 20, 2019, 1 a.m. 2.3 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A 5.0 μg/m3 (5) 5.9 μg/m3 (25) 25.0
 
March 20, 2019, midnight 2.5 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (5) 7.4 μg/m3 (31) 31.0
 
March 19, 2019, 11 p.m. 2.9 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 5.0 μg/m3 (5) 3.8 μg/m3 (16) 16.0
 
March 19, 2019, 10 p.m. 3.0 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 5.0 μg/m3 (5) 2.9 μg/m3 (12) 12.0
 
March 19, 2019, 9 p.m. 3.4 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (1) N/A N/A 4.0 μg/m3 (4) 2.9 μg/m3 (12) 12.0
 
March 19, 2019, 8 p.m. 4.1 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) N/A N/A 5.0 μg/m3 (5) 5.9 μg/m3 (25) 25.0
 
March 19, 2019, 7 p.m. 6.3 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (5) 8.9 μg/m3 (37) 37.0
 
March 19, 2019, 6 p.m. 8.1 ppb (8) 1.8 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (5) 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 5 p.m. 9.1 ppb (8) 2.4 ppb (2) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) 8.4 μg/m3 (35) 35.0
 
March 19, 2019, 4 p.m. 12.6 ppb (12) 4.0 ppb (4) N/A 9.0 ppb (8) N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (9) 13.5 μg/m3 (53) 53.0
 
March 19, 2019, 3 p.m. 12.3 ppb (11) 4.2 ppb (4) N/A 8.0 ppb (7) N/A 2.0 ppb (3) N/A N/A 8.0 μg/m3 (7) 18.5 μg/m3 (64) 64.0
 
March 19, 2019, 2 p.m. 11.6 ppb (11) 2.8 ppb (3) N/A 9.0 ppb (8) N/A 1.0 ppb (1) N/A N/A 10.0 μg/m3 (9) 20.9 μg/m3 (69) 69.0
 
March 19, 2019, 1 p.m. 12.0 ppb (11) 1.5 ppb (1) N/A 11.0 ppb (10) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) 19.6 μg/m3 (66) 66.0
 
March 19, 2019, noon 9.6 ppb (9) 0.1 ppb (0) N/A 10.0 ppb (9) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) 19.5 μg/m3 (66) 66.0
 
March 19, 2019, 11 a.m. 14.6 ppb (14) 2.6 ppb (2) N/A 12.0 ppb (11) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) 17.0 μg/m3 (61) 61.0
 
March 19, 2019, 10 a.m. 9.2 ppb (9) 0.9 ppb (1) N/A 8.0 ppb (7) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) 15.9 μg/m3 (58) 58.0
 
March 19, 2019, 9 a.m. 8.8 ppb (8) 0.1 ppb (0) N/A 9.0 ppb (8) N/A 1.0 ppb (1) N/A N/A 9.0 μg/m3 (8) 15.3 μg/m3 (57) 57.0
 
March 19, 2019, 8 a.m. 6.9 ppb (6) 0.0 ppb (0) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) 13.1 μg/m3 (52) 52.0
 
March 19, 2019, 7 a.m. 6.3 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) 16.4 μg/m3 (59) 59.0
 
March 19, 2019, 6 a.m. 6.5 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 7.0 μg/m3 (6) 9.1 μg/m3 (38) 38.0
 
March 19, 2019, 5 a.m. 6.4 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) 8.5 μg/m3 (35) 35.0
 
March 19, 2019, 4 a.m. 8.9 ppb (8) 0.0 ppb (0) N/A 9.0 ppb (8) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) 5.2 μg/m3 (22) 22.0
 
March 19, 2019, 3 a.m. 8.4 ppb (8) 0.1 ppb (0) N/A 8.0 ppb (7) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) 5.5 μg/m3 (23) 23.0
 
March 19, 2019, 2 a.m. 8.0 ppb (7) 0.1 ppb (0) N/A 8.0 ppb (7) N/A 1.0 ppb (1) N/A N/A 8.0 μg/m3 (7) 5.4 μg/m3 (23) 23.0
 
March 19, 2019, 1 a.m. 7.4 ppb (7) 0.4 ppb (0) N/A 7.0 ppb (6) N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (5) 5.3 μg/m3 (22) 22.0
 
March 19, 2019, midnight 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 5.0 μg/m3 (5) 4.1 μg/m3 (17) 17.0
 
March 18, 2019, 11 p.m. 2.1 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 6.0 μg/m3 (5) 5.2 μg/m3 (22) 22.0
 
March 18, 2019, 10 p.m. 2.2 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 6.0 μg/m3 (5) 2.5 μg/m3 (10) 10.0
 
March 18, 2019, 9 p.m. 2.2 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A 5.0 μg/m3 (5) 2.4 μg/m3 (10) 10.0
 
March 18, 2019, 8 p.m. 2.2 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (1) N/A N/A 6.0 μg/m3 (5) 4.6 μg/m3 (19) 19.0