AQSQID: 060831008

Site Name: Santa Maria - Broadway

Location: Santa Maria (S McClelland St), CA

Reporting: True, Located: True

Current AQI: 38.0

Santa Maria (S McClelland St) CA, US: 34.9481, -120.4344

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 25, 2019, 11 p.m. 7.3 ppb (7) 2.5 ppb (2) N/A 5.0 ppb (5) N/A N/A 50.0 ppb (38) 0.17 ppb (2) 21.0 μg/m3 (19) 6.0 μg/m3 (25) 38.0
 
March 25, 2019, 10 p.m. 6.4 ppb (6) 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A 49.0 ppb (38) 0.17 ppb (2) 24.0 μg/m3 (22) 4.0 μg/m3 (17) 38.0
 
March 25, 2019, 9 p.m. 6.1 ppb (6) 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A 48.0 ppb (37) 0.15 ppb (2) 21.0 μg/m3 (19) 3.0 μg/m3 (12) 37.0
 
March 25, 2019, 8 p.m. 6.6 ppb (6) 2.3 ppb (2) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) 0.15 ppb (2) 22.0 μg/m3 (20) 6.0 μg/m3 (25) 35.0
 
March 25, 2019, 7 p.m. 6.9 ppb (6) 2.4 ppb (2) N/A 5.0 ppb (5) N/A N/A 42.0 ppb (32) 0.17 ppb (2) 25.0 μg/m3 (23) 7.0 μg/m3 (29) 32.0
 
March 25, 2019, 6 p.m. 8.9 ppb (8) 3.5 ppb (3) N/A 5.0 ppb (5) N/A N/A 36.0 ppb (28) 0.18 ppb (2) 34.0 μg/m3 (31) 5.0 μg/m3 (21) 31.0
 
March 25, 2019, 5 p.m. 8.7 ppb (8) 3.2 ppb (3) N/A 5.0 ppb (5) N/A N/A 28.0 ppb (22) 0.2 ppb (2) 20.0 μg/m3 (18) 6.0 μg/m3 (25) 25.0
 
March 25, 2019, 4 p.m. 12.7 ppb (12) 5.7 ppb (5) N/A 7.0 ppb (6) N/A N/A 19.0 ppb (15) 0.19 ppb (2) 26.0 μg/m3 (24) 5.0 μg/m3 (21) 24.0
 
March 25, 2019, 3 p.m. 12.1 ppb (11) 4.8 ppb (4) N/A 7.0 ppb (6) N/A N/A 13.0 ppb (10) 0.18 ppb (2) 22.0 μg/m3 (20) 6.0 μg/m3 (25) 25.0
 
March 25, 2019, 2 p.m. 10.4 ppb (10) 2.1 ppb (2) N/A 8.0 ppb (7) N/A N/A 11.0 ppb (8) 0.2 ppb (2) 21.0 μg/m3 (19) 3.0 μg/m3 (12) 19.0
 
March 25, 2019, 1 p.m. 10.0 ppb (9) 2.0 ppb (2) N/A 8.0 ppb (7) N/A N/A 13.0 ppb (10) 0.23 ppb (3) 16.0 μg/m3 (15) 4.0 μg/m3 (17) 17.0
 
March 25, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 13.0 μg/m3 (12) 6.0 μg/m3 (25) 25.0
 
March 25, 2019, 11 a.m. 3.6 ppb (3) 1.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 15.0 ppb (12) 0.14 ppb (2) 12.0 μg/m3 (11) 8.0 μg/m3 (33) 33.0
 
March 25, 2019, 10 a.m. 3.0 ppb (3) 0.8 ppb (1) N/A 2.0 ppb (2) N/A N/A 15.0 ppb (12) 0.14 ppb (2) 9.0 μg/m3 (8) 6.0 μg/m3 (25) 25.0
 
March 25, 2019, 9 a.m. 2.9 ppb (3) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 16.0 ppb (12) 0.14 ppb (2) 10.0 μg/m3 (9) 7.0 μg/m3 (29) 29.0
 
March 25, 2019, 8 a.m. 3.0 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 19.0 ppb (15) 0.14 ppb (2) 14.0 μg/m3 (13) 4.0 μg/m3 (17) 17.0
 
March 25, 2019, 7 a.m. 4.3 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 20.0 ppb (15) 0.17 ppb (2) 15.0 μg/m3 (14) 5.0 μg/m3 (21) 21.0
 
March 25, 2019, 6 a.m. 3.6 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 20.0 ppb (15) 0.16 ppb (2) 18.0 μg/m3 (16) 7.0 μg/m3 (29) 29.0
 
March 25, 2019, 5 a.m. 8.9 ppb (8) 0.9 ppb (1) N/A 8.0 ppb (7) N/A N/A 23.0 ppb (18) 0.21 ppb (2) 27.0 μg/m3 (25) 8.0 μg/m3 (33) 33.0
 
March 25, 2019, 4 a.m. 7.2 ppb (7) 1.4 ppb (1) N/A 6.0 ppb (6) N/A N/A 33.0 ppb (25) 0.19 ppb (2) 30.0 μg/m3 (27) 8.0 μg/m3 (33) 33.0
 
March 25, 2019, 3 a.m. 6.7 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 35.0 ppb (27) 0.19 ppb (2) 27.0 μg/m3 (25) 8.0 μg/m3 (33) 33.0
 
March 25, 2019, 2 a.m. 6.7 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (30) 0.2 ppb (2) 30.0 μg/m3 (27) 9.0 μg/m3 (38) 38.0
 
March 25, 2019, 1 a.m. 6.0 ppb (6) 1.9 ppb (2) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) 0.18 ppb (2) 25.0 μg/m3 (23) 7.0 μg/m3 (29) 32.0
 
March 25, 2019, midnight 4.4 ppb (4) 1.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (33) 0.16 ppb (2) 25.0 μg/m3 (23) 6.0 μg/m3 (25) 33.0
 
March 24, 2019, 11 p.m. 6.0 ppb (6) 2.2 ppb (2) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) 0.18 ppb (2) 23.0 μg/m3 (21) N/A 33.0
 
March 24, 2019, 10 p.m. 5.3 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (33) 0.16 ppb (2) 30.0 μg/m3 (27) 8.0 μg/m3 (33) 33.0
 
March 24, 2019, 9 p.m. 5.2 ppb (5) 1.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) 0.18 ppb (2) 25.0 μg/m3 (23) 8.0 μg/m3 (33) 33.0
 
March 24, 2019, 8 p.m. 4.1 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) 0.17 ppb (2) 17.0 μg/m3 (15) 8.0 μg/m3 (33) 34.0
 
March 24, 2019, 7 p.m. 5.4 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) 0.24 ppb (3) 13.0 μg/m3 (12) 9.0 μg/m3 (38) 38.0
 
March 24, 2019, 6 p.m. 6.5 ppb (6) 2.2 ppb (2) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) 0.19 ppb (2) 17.0 μg/m3 (15) 7.0 μg/m3 (29) 32.0
 
March 24, 2019, 5 p.m. 9.1 ppb (8) 4.4 ppb (4) N/A 5.0 ppb (5) N/A N/A 39.0 ppb (30) 0.18 ppb (2) 18.0 μg/m3 (16) 9.0 μg/m3 (38) 38.0
 
March 24, 2019, 4 p.m. 5.5 ppb (5) 1.7 ppb (2) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) 0.17 ppb (2) 21.0 μg/m3 (19) 12.0 μg/m3 (50) 50.0
 
March 24, 2019, 3 p.m. 13.0 ppb (12) 4.5 ppb (4) N/A 9.0 ppb (8) N/A N/A 16.0 ppb (12) 0.22 ppb (2) 26.0 μg/m3 (24) 9.0 μg/m3 (38) 38.0
 
March 24, 2019, 2 p.m. 15.0 ppb (14) 4.5 ppb (4) N/A 11.0 ppb (10) N/A N/A 7.0 ppb (5) 0.21 ppb (2) 20.0 μg/m3 (18) 8.0 μg/m3 (33) 33.0
 
March 24, 2019, 1 p.m. 10.7 ppb (10) 2.3 ppb (2) N/A 9.0 ppb (8) N/A N/A 12.0 ppb (9) 0.21 ppb (2) 20.0 μg/m3 (18) 8.0 μg/m3 (33) 33.0
 
March 24, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 18.0 μg/m3 (16) 8.0 μg/m3 (33) 33.0
 
March 24, 2019, 11 a.m. 10.6 ppb (10) 1.0 ppb (1) N/A 10.0 ppb (9) N/A N/A 16.0 ppb (12) 0.27 ppb (3) 20.0 μg/m3 (18) 10.0 μg/m3 (42) 42.0
 
March 24, 2019, 10 a.m. 8.1 ppb (8) 0.9 ppb (1) N/A 7.0 ppb (6) N/A N/A 18.0 ppb (14) 0.21 ppb (2) 19.0 μg/m3 (17) 5.0 μg/m3 (21) 21.0
 
March 24, 2019, 9 a.m. 9.6 ppb (9) 1.3 ppb (1) N/A 8.0 ppb (7) N/A N/A 10.0 ppb (8) 0.23 ppb (3) 19.0 μg/m3 (17) 5.0 μg/m3 (21) 21.0
 
March 24, 2019, 8 a.m. 7.5 ppb (7) 1.2 ppb (1) N/A 6.0 ppb (6) N/A N/A 15.0 ppb (12) 0.21 ppb (2) 17.0 μg/m3 (15) 9.0 μg/m3 (38) 38.0
 
March 24, 2019, 7 a.m. 7.7 ppb (7) 0.9 ppb (1) N/A 7.0 ppb (6) N/A N/A 14.0 ppb (11) 0.24 ppb (3) 19.0 μg/m3 (17) 11.0 μg/m3 (46) 46.0
 
March 24, 2019, 6 a.m. 11.1 ppb (10) 0.9 ppb (1) N/A 10.0 ppb (9) N/A N/A 14.0 ppb (11) 0.28 ppb (3) 21.0 μg/m3 (19) 10.0 μg/m3 (42) 42.0
 
March 24, 2019, 5 a.m. 9.7 ppb (9) 1.5 ppb (1) N/A 8.0 ppb (7) N/A N/A 26.0 ppb (20) 0.26 ppb (3) 41.0 μg/m3 (37) 11.0 μg/m3 (46) 46.0
 
March 24, 2019, 4 a.m. 8.8 ppb (8) 2.0 ppb (2) N/A 7.0 ppb (6) N/A N/A 32.0 ppb (25) 0.24 ppb (3) 42.0 μg/m3 (38) 6.0 μg/m3 (25) 38.0
 
March 24, 2019, 3 a.m. 7.7 ppb (7) 1.9 ppb (2) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (26) 0.2 ppb (2) 37.0 μg/m3 (34) 6.0 μg/m3 (25) 34.0
 
March 24, 2019, 2 a.m. 4.6 ppb (4) 1.4 ppb (1) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.16 ppb (2) 33.0 μg/m3 (30) 8.0 μg/m3 (33) 33.0
 
March 24, 2019, 1 a.m. 4.5 ppb (4) 1.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 41.0 ppb (32) 0.16 ppb (2) 71.0 μg/m3 (58) 10.0 μg/m3 (42) 58.0
 
March 24, 2019, midnight 5.0 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) 0.15 ppb (2) 54.0 μg/m3 (49) 10.0 μg/m3 (42) 49.0
 
March 23, 2019, 11 p.m. 4.9 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 42.0 ppb (32) 0.15 ppb (2) 30.0 μg/m3 (27) 6.0 μg/m3 (25) 32.0
 
March 23, 2019, 10 p.m. 5.1 ppb (5) 2.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.15 ppb (2) 16.0 μg/m3 (15) 5.0 μg/m3 (21) 29.0
 
March 23, 2019, 9 p.m. 5.3 ppb (5) 2.1 ppb (2) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.15 ppb (2) 15.0 μg/m3 (14) 5.0 μg/m3 (21) 28.0
 
March 23, 2019, 8 p.m. 5.4 ppb (5) 2.3 ppb (2) N/A 3.0 ppb (3) N/A N/A 37.0 ppb (28) 0.16 ppb (2) 15.0 μg/m3 (14) 4.0 μg/m3 (17) 28.0
 
March 23, 2019, 7 p.m. 6.2 ppb (6) 2.1 ppb (2) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) 0.17 ppb (2) 17.0 μg/m3 (15) 5.0 μg/m3 (21) 28.0
 
March 23, 2019, 6 p.m. 7.1 ppb (7) 2.4 ppb (2) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) 0.18 ppb (2) 16.0 μg/m3 (15) 3.0 μg/m3 (12) 25.0
 
March 23, 2019, 5 p.m. 4.9 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 27.0 ppb (21) 0.14 ppb (2) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 21.0
 
March 23, 2019, 4 p.m. 8.3 ppb (8) 2.4 ppb (2) N/A 6.0 ppb (6) N/A N/A 16.0 ppb (12) 0.15 ppb (2) 10.0 μg/m3 (9) 2.0 μg/m3 (8) 12.0
 
March 23, 2019, 3 p.m. 7.6 ppb (7) 1.4 ppb (1) N/A 6.0 ppb (6) N/A N/A 19.0 ppb (15) 0.17 ppb (2) 9.0 μg/m3 (8) 3.0 μg/m3 (12) 15.0
 
March 23, 2019, 2 p.m. 6.1 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 18.0 ppb (14) 0.14 ppb (2) 8.0 μg/m3 (7) 3.0 μg/m3 (12) 14.0
 
March 23, 2019, 1 p.m. 4.2 ppb (4) 0.9 ppb (1) N/A 3.0 ppb (3) N/A N/A 18.0 ppb (14) 0.14 ppb (2) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 14.0
 
March 23, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) 3.0 μg/m3 (12) 12.0
 
March 23, 2019, 11 a.m. 3.4 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 17.0 ppb (13) 0.13 ppb (1) 10.0 μg/m3 (9) 5.0 μg/m3 (21) 21.0
 
March 23, 2019, 10 a.m. 4.7 ppb (4) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 16.0 ppb (12) 0.13 ppb (1) 9.0 μg/m3 (8) 4.0 μg/m3 (17) 17.0
 
March 23, 2019, 9 a.m. 4.4 ppb (4) 0.7 ppb (1) N/A 4.0 ppb (4) N/A N/A 19.0 ppb (15) 0.13 ppb (1) 9.0 μg/m3 (8) 3.0 μg/m3 (12) 15.0
 
March 23, 2019, 8 a.m. 5.0 ppb (5) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 13.0 ppb (10) 0.14 ppb (2) 9.0 μg/m3 (8) 2.0 μg/m3 (8) 10.0
 
March 23, 2019, 7 a.m. 4.3 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 15.0 ppb (12) 0.14 ppb (2) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 25.0
 
March 23, 2019, 6 a.m. 10.6 ppb (10) 1.2 ppb (1) N/A 9.0 ppb (8) N/A N/A 13.0 ppb (10) 0.22 ppb (2) 21.0 μg/m3 (19) 9.0 μg/m3 (38) 38.0
 
March 23, 2019, 5 a.m. 12.9 ppb (12) 2.1 ppb (2) N/A 11.0 ppb (10) N/A N/A 24.0 ppb (18) 0.22 ppb (2) 27.0 μg/m3 (25) 7.0 μg/m3 (29) 29.0
 
March 23, 2019, 4 a.m. 9.9 ppb (9) 1.6 ppb (1) N/A 8.0 ppb (7) N/A N/A 26.0 ppb (20) 0.19 ppb (2) 26.0 μg/m3 (24) 7.0 μg/m3 (29) 29.0
 
March 23, 2019, 3 a.m. 8.3 ppb (8) 1.6 ppb (1) N/A 7.0 ppb (6) N/A N/A 30.0 ppb (23) 0.19 ppb (2) 22.0 μg/m3 (20) 3.0 μg/m3 (12) 23.0
 
March 23, 2019, 2 a.m. 5.3 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (27) 0.17 ppb (2) 14.0 μg/m3 (13) 5.0 μg/m3 (21) 27.0
 
March 23, 2019, 1 a.m. 5.6 ppb (5) 2.3 ppb (2) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.17 ppb (2) 21.0 μg/m3 (19) 6.0 μg/m3 (25) 29.0
 
March 23, 2019, midnight 6.5 ppb (6) 2.7 ppb (3) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (30) 0.18 ppb (2) 23.0 μg/m3 (21) 4.0 μg/m3 (17) 30.0
 
March 22, 2019, 11 p.m. 5.8 ppb (5) 2.3 ppb (2) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) 0.17 ppb (2) 17.0 μg/m3 (15) 2.0 μg/m3 (8) 32.0
 
March 22, 2019, 10 p.m. 6.9 ppb (6) 2.9 ppb (3) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) 0.17 ppb (2) 18.0 μg/m3 (16) 3.0 μg/m3 (12) 31.0
 
March 22, 2019, 9 p.m. 6.3 ppb (6) 2.6 ppb (2) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (30) 0.15 ppb (2) 17.0 μg/m3 (15) 2.0 μg/m3 (8) 30.0
 
March 22, 2019, 8 p.m. 6.8 ppb (6) 2.8 ppb (3) N/A 4.0 ppb (4) N/A N/A 40.0 ppb (31) 0.15 ppb (2) 16.0 μg/m3 (15) 2.0 μg/m3 (8) 31.0
 
March 22, 2019, 7 p.m. 5.8 ppb (5) 2.2 ppb (2) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (30) 0.16 ppb (2) 15.0 μg/m3 (14) 3.0 μg/m3 (12) 30.0
 
March 22, 2019, 6 p.m. 8.8 ppb (8) 3.6 ppb (3) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) 0.17 ppb (2) 19.0 μg/m3 (17) 3.0 μg/m3 (12) 25.0
 
March 22, 2019, 5 p.m. 8.0 ppb (7) 3.6 ppb (3) N/A 5.0 ppb (5) N/A N/A 25.0 ppb (19) 0.18 ppb (2) 16.0 μg/m3 (15) 0.0 μg/m3 (0) 19.0
 
March 22, 2019, 4 p.m. 8.1 ppb (8) 3.9 ppb (4) N/A 4.0 ppb (4) N/A N/A 16.0 ppb (12) 0.16 ppb (2) 9.0 μg/m3 (8) 1.0 μg/m3 (4) 12.0
 
March 22, 2019, 3 p.m. 12.6 ppb (12) 4.9 ppb (5) N/A 8.0 ppb (7) N/A N/A 12.0 ppb (9) 0.18 ppb (2) 10.0 μg/m3 (9) 2.0 μg/m3 (8) 12.0
 
March 22, 2019, 2 p.m. 10.9 ppb (10) 3.8 ppb (4) N/A 7.0 ppb (6) N/A N/A 8.0 ppb (6) 0.22 ppb (2) 11.0 μg/m3 (10) 1.0 μg/m3 (4) 10.0
 
March 22, 2019, 1 p.m. 12.1 ppb (11) 2.7 ppb (3) N/A 9.0 ppb (8) N/A N/A 6.0 ppb (5) 0.21 ppb (2) 9.0 μg/m3 (8) -1.0 μg/m3 (0) 11.0
 
March 22, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 5.0 μg/m3 (5) -1.0 μg/m3 (0) 5.0
 
March 22, 2019, 11 a.m. 4.5 ppb (4) 1.1 ppb (1) N/A 4.0 ppb (4) N/A N/A 13.0 ppb (10) 0.14 ppb (2) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 12.0
 
March 22, 2019, 10 a.m. 3.0 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 15.0 ppb (12) 0.14 ppb (2) 4.0 μg/m3 (4) 2.0 μg/m3 (8) 12.0
 
March 22, 2019, 9 a.m. 3.3 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 12.0 ppb (9) 0.14 ppb (2) 7.0 μg/m3 (6) 1.0 μg/m3 (4) 9.0
 
March 22, 2019, 8 a.m. 6.0 ppb (6) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 16.0 ppb (12) 0.17 ppb (2) 10.0 μg/m3 (9) 3.0 μg/m3 (12) 12.0
 
March 22, 2019, 7 a.m. 8.4 ppb (8) 0.8 ppb (1) N/A 8.0 ppb (7) N/A N/A 18.0 ppb (14) 0.2 ppb (2) 14.0 μg/m3 (13) 6.0 μg/m3 (25) 25.0
 
March 22, 2019, 6 a.m. 9.4 ppb (9) 0.9 ppb (1) N/A 9.0 ppb (8) N/A N/A 17.0 ppb (13) 0.23 ppb (3) 15.0 μg/m3 (14) 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 5 a.m. 10.0 ppb (9) 1.3 ppb (1) N/A 9.0 ppb (8) N/A N/A 25.0 ppb (19) 0.22 ppb (2) 19.0 μg/m3 (17) 10.0 μg/m3 (42) 42.0
 
March 22, 2019, 4 a.m. 12.1 ppb (11) 2.5 ppb (2) N/A 10.0 ppb (9) N/A N/A 29.0 ppb (22) 0.21 ppb (2) 27.0 μg/m3 (25) 5.0 μg/m3 (21) 25.0
 
March 22, 2019, 3 a.m. 12.8 ppb (12) 2.8 ppb (3) N/A 10.0 ppb (9) N/A N/A 32.0 ppb (25) 0.24 ppb (3) 24.0 μg/m3 (22) N/A 25.0
 
March 22, 2019, 2 a.m. 7.6 ppb (7) 2.0 ppb (2) N/A 6.0 ppb (6) N/A N/A 40.0 ppb (31) 0.19 ppb (2) 20.0 μg/m3 (18) 3.0 μg/m3 (12) 31.0
 
March 22, 2019, 1 a.m. 7.1 ppb (7) 2.5 ppb (2) N/A 5.0 ppb (5) N/A N/A 42.0 ppb (32) 0.18 ppb (2) 19.0 μg/m3 (17) 3.0 μg/m3 (12) 32.0
 
March 22, 2019, midnight 6.6 ppb (6) 2.7 ppb (3) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) 0.17 ppb (2) 17.0 μg/m3 (15) 3.0 μg/m3 (12) 34.0
 
March 21, 2019, 11 p.m. 4.9 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (35) 0.14 ppb (2) 10.0 μg/m3 (9) 1.0 μg/m3 (4) 35.0
 
March 21, 2019, 10 p.m. 4.5 ppb (4) 2.0 ppb (2) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) 0.14 ppb (2) 8.0 μg/m3 (7) 2.0 μg/m3 (8) 35.0
 
March 21, 2019, 9 p.m. 5.3 ppb (5) 2.1 ppb (2) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (35) 0.14 ppb (2) 8.0 μg/m3 (7) 2.0 μg/m3 (8) 35.0
 
March 21, 2019, 8 p.m. 6.6 ppb (6) 2.3 ppb (2) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) 0.16 ppb (2) 13.0 μg/m3 (12) 3.0 μg/m3 (12) 34.0
 
March 21, 2019, 7 p.m. 5.7 ppb (5) 1.8 ppb (2) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) 0.16 ppb (2) 8.0 μg/m3 (7) 3.0 μg/m3 (12) 33.0
 
March 21, 2019, 6 p.m. 5.0 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 40.0 ppb (31) 0.16 ppb (2) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 31.0
 
March 21, 2019, 5 p.m. 2.6 ppb (2) 1.0 ppb (1) N/A 2.0 ppb (2) N/A N/A 38.0 ppb (29) 0.13 ppb (1) 3.0 μg/m3 (3) 1.0 μg/m3 (4) 29.0
 
March 21, 2019, 4 p.m. 4.1 ppb (4) 1.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 33.0 ppb (25) 0.14 ppb (2) 5.0 μg/m3 (5) 2.0 μg/m3 (8) 25.0
 
March 21, 2019, 3 p.m. 8.4 ppb (8) 2.7 ppb (3) N/A 6.0 ppb (6) N/A N/A 25.0 ppb (19) 0.17 ppb (2) 5.0 μg/m3 (5) 1.0 μg/m3 (4) 19.0
 
March 21, 2019, 2 p.m. 10.1 ppb (9) 2.5 ppb (2) N/A 8.0 ppb (7) N/A N/A 19.0 ppb (15) 0.23 ppb (3) 6.0 μg/m3 (5) 2.0 μg/m3 (8) 15.0
 
March 21, 2019, 1 p.m. 4.5 ppb (4) 1.1 ppb (1) N/A 3.0 ppb (3) N/A N/A 21.0 ppb (16) 0.16 ppb (2) 3.0 μg/m3 (3) 4.0 μg/m3 (17) 17.0
 
March 21, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 4.0 μg/m3 (4) 1.0 μg/m3 (4) 4.0
 
March 21, 2019, 11 a.m. 2.1 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 22.0 ppb (17) 0.13 ppb (1) 7.0 μg/m3 (6) 0.0 μg/m3 (0) 17.0
 
March 21, 2019, 10 a.m. 2.2 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 22.0 ppb (17) 0.13 ppb (1) 9.0 μg/m3 (8) 0.0 μg/m3 (0) 17.0
 
March 21, 2019, 9 a.m. 1.6 ppb (1) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 23.0 ppb (18) 0.13 ppb (1) 8.0 μg/m3 (7) -1.0 μg/m3 (0) 18.0
 
March 21, 2019, 8 a.m. 3.2 ppb (3) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 20.0 ppb (15) 0.14 ppb (2) 10.0 μg/m3 (9) 0.0 μg/m3 (0) 15.0
 
March 21, 2019, 7 a.m. 3.9 ppb (4) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 23.0 ppb (18) 0.15 ppb (2) 10.0 μg/m3 (9) 2.0 μg/m3 (8) 18.0
 
March 21, 2019, 6 a.m. 7.0 ppb (6) 2.8 ppb (3) N/A 4.0 ppb (4) N/A N/A 23.0 ppb (18) 0.17 ppb (2) 6.0 μg/m3 (5) 4.0 μg/m3 (17) 18.0
 
March 21, 2019, 5 a.m. 8.8 ppb (8) 0.7 ppb (1) N/A 8.0 ppb (7) N/A N/A 22.0 ppb (17) 0.23 ppb (3) 17.0 μg/m3 (15) 6.0 μg/m3 (25) 25.0
 
March 21, 2019, 4 a.m. 9.6 ppb (9) 0.9 ppb (1) N/A 9.0 ppb (8) N/A N/A 30.0 ppb (23) 0.24 ppb (3) 25.0 μg/m3 (23) 7.0 μg/m3 (29) 29.0
 
March 21, 2019, 3 a.m. 12.1 ppb (11) 2.5 ppb (2) N/A 10.0 ppb (9) N/A N/A 33.0 ppb (25) 0.25 ppb (3) 28.0 μg/m3 (25) 7.0 μg/m3 (29) 29.0
 
March 21, 2019, 2 a.m. 8.1 ppb (8) 2.2 ppb (2) N/A 6.0 ppb (6) N/A N/A 40.0 ppb (31) 0.21 ppb (2) 27.0 μg/m3 (25) 4.0 μg/m3 (17) 31.0
 
March 21, 2019, 1 a.m. 4.9 ppb (5) 1.7 ppb (2) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (35) 0.19 ppb (2) 19.0 μg/m3 (17) 4.0 μg/m3 (17) 35.0
 
March 21, 2019, midnight 5.1 ppb (5) 1.9 ppb (2) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) 0.15 ppb (2) 20.0 μg/m3 (18) 5.0 μg/m3 (21) 35.0
 
March 20, 2019, 11 p.m. 5.5 ppb (5) 2.2 ppb (2) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) 0.16 ppb (2) 17.0 μg/m3 (15) 3.0 μg/m3 (12) 35.0
 
March 20, 2019, 10 p.m. 6.5 ppb (6) 2.7 ppb (3) N/A 4.0 ppb (4) N/A N/A 46.0 ppb (35) 0.16 ppb (2) 18.0 μg/m3 (16) 2.0 μg/m3 (8) 35.0
 
March 20, 2019, 9 p.m. 5.3 ppb (5) 2.4 ppb (2) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) 0.16 ppb (2) 15.0 μg/m3 (14) 1.0 μg/m3 (4) 36.0
 
March 20, 2019, 8 p.m. 7.8 ppb (7) 2.8 ppb (3) N/A 5.0 ppb (5) N/A N/A 46.0 ppb (35) 0.16 ppb (2) 15.0 μg/m3 (14) 2.0 μg/m3 (8) 35.0
 
March 20, 2019, 7 p.m. 7.8 ppb (7) 3.0 ppb (3) N/A 5.0 ppb (5) N/A N/A 43.0 ppb (33) 0.17 ppb (2) 15.0 μg/m3 (14) 4.0 μg/m3 (17) 33.0
 
March 20, 2019, 6 p.m. 10.8 ppb (10) 3.3 ppb (3) N/A 8.0 ppb (7) N/A N/A 40.0 ppb (31) 0.2 ppb (2) 8.0 μg/m3 (7) 4.0 μg/m3 (17) 31.0
 
March 20, 2019, 5 p.m. 5.2 ppb (5) 1.5 ppb (1) N/A 4.0 ppb (4) N/A N/A 41.0 ppb (32) 0.13 ppb (1) 8.0 μg/m3 (7) 3.0 μg/m3 (12) 32.0
 
March 20, 2019, 4 p.m. 8.8 ppb (8) 1.7 ppb (2) N/A 7.0 ppb (6) N/A N/A 31.0 ppb (24) 0.18 ppb (2) 8.0 μg/m3 (7) 4.0 μg/m3 (17) 24.0
 
March 20, 2019, 3 p.m. 14.7 ppb (14) 2.5 ppb (2) N/A 12.0 ppb (11) N/A N/A 24.0 ppb (18) 0.25 ppb (3) 10.0 μg/m3 (9) 6.0 μg/m3 (25) 25.0
 
March 20, 2019, 2 p.m. 11.5 ppb (11) 1.0 ppb (1) N/A 11.0 ppb (10) N/A N/A 24.0 ppb (18) 0.21 ppb (2) 9.0 μg/m3 (8) 6.0 μg/m3 (25) 25.0
 
March 20, 2019, 1 p.m. 8.3 ppb (8) 0.5 ppb (0) N/A 8.0 ppb (7) N/A N/A 28.0 ppb (22) 0.19 ppb (2) 11.0 μg/m3 (10) 5.0 μg/m3 (21) 22.0
 
March 20, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (10) 4.0 μg/m3 (17) 17.0
 
March 20, 2019, 11 a.m. 2.8 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.12 ppb (1) 6.0 μg/m3 (5) 3.0 μg/m3 (12) 29.0
 
March 20, 2019, 10 a.m. 4.1 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A N/A 35.0 ppb (27) 0.12 ppb (1) 6.0 μg/m3 (5) 5.0 μg/m3 (21) 27.0
 
March 20, 2019, 9 a.m. 2.8 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 33.0 ppb (25) 0.1 ppb (1) 6.0 μg/m3 (5) 6.0 μg/m3 (25) 25.0
 
March 20, 2019, 8 a.m. 2.5 ppb (2) 0.5 ppb (0) N/A 2.0 ppb (2) N/A N/A 35.0 ppb (27) 0.1 ppb (1) 5.0 μg/m3 (5) 6.0 μg/m3 (25) 27.0
 
March 20, 2019, 7 a.m. 3.4 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) 0.12 ppb (1) 7.0 μg/m3 (6) 2.0 μg/m3 (8) 29.0
 
March 20, 2019, 6 a.m. 2.0 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) 0.11 ppb (1) 3.0 μg/m3 (3) 2.0 μg/m3 (8) 35.0
 
March 20, 2019, 5 a.m. 2.0 ppb (2) 0.5 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) 0.11 ppb (1) 5.0 μg/m3 (5) 3.0 μg/m3 (12) 36.0
 
March 20, 2019, 4 a.m. 1.6 ppb (1) 0.3 ppb (0) N/A 1.0 ppb (1) N/A N/A 47.0 ppb (36) 0.11 ppb (1) 8.0 μg/m3 (7) 3.0 μg/m3 (12) 36.0
 
March 20, 2019, 3 a.m. 2.6 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) 0.12 ppb (1) 8.0 μg/m3 (7) 4.0 μg/m3 (17) 37.0
 
March 20, 2019, 2 a.m. 3.4 ppb (3) 0.4 ppb (0) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) 0.14 ppb (2) 10.0 μg/m3 (9) 8.0 μg/m3 (33) 38.0
 
March 20, 2019, 1 a.m. 6.2 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 52.0 ppb (40) 0.17 ppb (2) 49.0 μg/m3 (45) 9.0 μg/m3 (38) 45.0
 
March 20, 2019, midnight 7.6 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 56.0 ppb (43) 0.18 ppb (2) 18.0 μg/m3 (16) 4.0 μg/m3 (17) 43.0
 
March 19, 2019, 11 p.m. 5.6 ppb (5) 0.7 ppb (1) N/A 5.0 ppb (5) N/A N/A 60.0 ppb (46) 0.17 ppb (2) 22.0 μg/m3 (20) 5.0 μg/m3 (21) 46.0
 
March 19, 2019, 10 p.m. 6.4 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 57.0 ppb (44) 0.17 ppb (2) 24.0 μg/m3 (22) 3.0 μg/m3 (12) 44.0
 
March 19, 2019, 9 p.m. 5.5 ppb (5) 1.3 ppb (1) N/A 4.0 ppb (4) N/A N/A 54.0 ppb (42) 0.16 ppb (2) 24.0 μg/m3 (22) 2.0 μg/m3 (8) 42.0
 
March 19, 2019, 8 p.m. 5.5 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 50.0 ppb (38) 0.15 ppb (2) 27.0 μg/m3 (25) N/A 38.0
 
March 19, 2019, 7 p.m. 6.0 ppb (6) 1.5 ppb (1) N/A 5.0 ppb (5) N/A N/A 47.0 ppb (36) 0.16 ppb (2) 17.0 μg/m3 (15) 3.0 μg/m3 (12) 36.0
 
March 19, 2019, 6 p.m. 11.8 ppb (11) 3.6 ppb (3) N/A 8.0 ppb (7) N/A N/A 41.0 ppb (32) 0.19 ppb (2) 22.0 μg/m3 (20) 3.0 μg/m3 (12) 32.0
 
March 19, 2019, 5 p.m. 10.3 ppb (10) 3.4 ppb (3) N/A 7.0 ppb (6) N/A N/A 30.0 ppb (23) 0.16 ppb (2) 29.0 μg/m3 (26) 3.0 μg/m3 (12) 26.0
 
March 19, 2019, 4 p.m. 14.1 ppb (13) 4.5 ppb (4) N/A 10.0 ppb (9) N/A N/A 19.0 ppb (15) 0.17 ppb (2) 24.0 μg/m3 (22) 5.0 μg/m3 (21) 22.0
 
March 19, 2019, 3 p.m. 24.1 ppb (22) 7.3 ppb (7) N/A 17.0 ppb (16) N/A N/A 10.0 ppb (8) 0.23 ppb (3) 29.0 μg/m3 (26) 8.0 μg/m3 (33) 33.0
 
March 19, 2019, 2 p.m. 23.6 ppb (22) 5.8 ppb (5) N/A 18.0 ppb (17) N/A N/A 8.0 ppb (6) 0.4 ppb (4) 37.0 μg/m3 (34) 6.0 μg/m3 (25) 34.0
 
March 19, 2019, 1 p.m. 8.6 ppb (8) 1.3 ppb (1) N/A 7.0 ppb (6) N/A N/A 19.0 ppb (15) 0.18 ppb (2) 14.0 μg/m3 (13) 4.0 μg/m3 (17) 17.0
 
March 19, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (9) 3.0 μg/m3 (12) 12.0
 
March 19, 2019, 11 a.m. 2.2 ppb (2) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 24.0 ppb (18) 0.11 ppb (1) 8.0 μg/m3 (7) 3.0 μg/m3 (12) 18.0
 
March 19, 2019, 10 a.m. 2.5 ppb (2) 0.6 ppb (1) N/A 2.0 ppb (2) N/A N/A 23.0 ppb (18) 0.11 ppb (1) 9.0 μg/m3 (8) 3.0 μg/m3 (12) 18.0
 
March 19, 2019, 9 a.m. 4.0 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 19.0 ppb (15) 0.12 ppb (1) 11.0 μg/m3 (10) 6.0 μg/m3 (25) 25.0
 
March 19, 2019, 8 a.m. 8.2 ppb (8) 0.7 ppb (1) N/A 7.0 ppb (6) N/A N/A 15.0 ppb (12) 0.18 ppb (2) 22.0 μg/m3 (20) 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 7 a.m. 8.4 ppb (8) 0.8 ppb (1) N/A 8.0 ppb (7) N/A N/A 18.0 ppb (14) 0.19 ppb (2) 25.0 μg/m3 (23) 8.0 μg/m3 (33) 33.0
 
March 19, 2019, 6 a.m. 6.2 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 19.0 ppb (15) 0.17 ppb (2) 17.0 μg/m3 (15) 8.0 μg/m3 (33) 33.0
 
March 19, 2019, 5 a.m. 7.0 ppb (6) 0.7 ppb (1) N/A 6.0 ppb (6) N/A N/A 19.0 ppb (15) 0.17 ppb (2) 18.0 μg/m3 (16) 8.0 μg/m3 (33) 33.0
 
March 19, 2019, 4 a.m. 13.1 ppb (12) 1.4 ppb (1) N/A 12.0 ppb (11) N/A N/A 21.0 ppb (16) 0.25 ppb (3) 37.0 μg/m3 (34) 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 3 a.m. 12.8 ppb (12) 1.8 ppb (2) N/A 11.0 ppb (10) N/A N/A 30.0 ppb (23) 0.22 ppb (2) 34.0 μg/m3 (31) 9.0 μg/m3 (38) 38.0
 
March 19, 2019, 2 a.m. 12.0 ppb (11) 2.3 ppb (2) N/A 10.0 ppb (9) N/A N/A 35.0 ppb (27) 0.22 ppb (2) 27.0 μg/m3 (25) 8.0 μg/m3 (33) 33.0
 
March 19, 2019, 1 a.m. 8.0 ppb (7) 2.1 ppb (2) N/A 6.0 ppb (6) N/A N/A 42.0 ppb (32) 0.19 ppb (2) 25.0 μg/m3 (23) 7.0 μg/m3 (29) 32.0
 
March 19, 2019, midnight 7.8 ppb (7) 2.6 ppb (2) N/A 5.0 ppb (5) N/A N/A 43.0 ppb (33) 0.18 ppb (2) 31.0 μg/m3 (28) 6.0 μg/m3 (25) 33.0