AQSQID: 060470003

Site Name: Merced - S. Coffee Ave

Location: Merced, CA

Reporting: True, Located: True

Current AQI: 38.0

Merced CA, US: 37.2817, -120.433601

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 21, 2019, 7 a.m. 3.7 ppb (3) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 31.0 ppb (24) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 21, 2019, 6 a.m. 4.5 ppb (4) -0.1 ppb (0) N/A 5.0 ppb (5) N/A N/A 29.0 ppb (22) N/A N/A 6.0 μg/m3 (25) 25.0
 
March 21, 2019, 5 a.m. 3.7 ppb (3) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 29.0 ppb (22) N/A N/A 6.0 μg/m3 (25) 25.0
 
March 21, 2019, 4 a.m. 5.5 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 30.0 ppb (23) N/A N/A 6.0 μg/m3 (25) 25.0
 
March 21, 2019, 3 a.m. 1.5 ppb (1) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 41.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
March 21, 2019, 2 a.m. 2.6 ppb (2) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 38.0 ppb (29) N/A N/A 5.0 μg/m3 (21) 29.0
 
March 21, 2019, 1 a.m. 2.3 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 47.0 ppb (36) N/A N/A 4.0 μg/m3 (17) 36.0
 
March 21, 2019, midnight 2.1 ppb (2) 0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 49.0 ppb (38) N/A N/A 4.0 μg/m3 (17) 38.0
 
March 20, 2019, 11 p.m. 2.7 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 48.0 ppb (37) N/A N/A 4.0 μg/m3 (17) 37.0
 
March 20, 2019, 10 p.m. 2.7 ppb (3) 0.4 ppb (0) N/A 2.0 ppb (2) N/A N/A 50.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
March 20, 2019, 9 p.m. 2.4 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A N/A 5.0 μg/m3 (21) 35.0
 
March 20, 2019, 8 p.m. 3.9 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 49.0 ppb (38) N/A N/A 5.0 μg/m3 (21) 38.0
 
March 20, 2019, 7 p.m. 3.1 ppb (3) 0.5 ppb (0) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 20, 2019, 6 p.m. 5.8 ppb (5) 1.0 ppb (1) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (29) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 5 p.m. 4.4 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 35.0 ppb (27) N/A N/A 6.0 μg/m3 (25) 27.0
 
March 20, 2019, 4 p.m. 6.4 ppb (6) 0.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) N/A N/A 6.0 μg/m3 (25) 25.0
 
March 20, 2019, 3 p.m. 5.1 ppb (5) 0.9 ppb (1) N/A 4.0 ppb (4) N/A N/A 32.0 ppb (25) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 20, 2019, 2 p.m. 3.8 ppb (4) 0.6 ppb (1) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 20, 2019, 1 p.m. 3.1 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 36.0 ppb (28) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 20, 2019, noon 1.6 ppb (1) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 36.0 ppb (28) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 6.0 μg/m3 (25) 25.0
 
March 20, 2019, 10 a.m. 1.9 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 20, 2019, 9 a.m. 1.3 ppb (1) -0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 34.0 ppb (26) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 20, 2019, 8 a.m. 1.2 ppb (1) -0.1 ppb (0) N/A 1.0 ppb (1) N/A N/A 40.0 ppb (31) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 7 a.m. 3.8 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 36.0 ppb (28) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 6 a.m. 3.7 ppb (3) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 20, 2019, 5 a.m. 1.9 ppb (2) -0.1 ppb (0) N/A 2.0 ppb (2) N/A N/A 44.0 ppb (34) N/A N/A 6.0 μg/m3 (25) 34.0
 
March 20, 2019, 4 a.m. 2.7 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 43.0 ppb (33) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 20, 2019, 3 a.m. 11.7 ppb (11) 0.2 ppb (0) N/A 12.0 ppb (11) N/A N/A 31.0 ppb (24) N/A N/A 17.0 μg/m3 (61) 61.0
 
March 20, 2019, 2 a.m. 11.3 ppb (10) 0.2 ppb (0) N/A 11.0 ppb (10) N/A N/A 34.0 ppb (26) N/A N/A 16.0 μg/m3 (59) 59.0
 
March 20, 2019, 1 a.m. 7.3 ppb (7) 0.1 ppb (0) N/A 7.0 ppb (6) N/A N/A 41.0 ppb (32) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 20, 2019, midnight 4.3 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 48.0 ppb (37) N/A N/A 18.0 μg/m3 (63) 63.0
 
March 19, 2019, 11 p.m. 4.3 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 52.0 ppb (40) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 19, 2019, 10 p.m. 5.3 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 54.0 ppb (42) N/A N/A 16.0 μg/m3 (59) 59.0
 
March 19, 2019, 9 p.m. 4.3 ppb (4) 0.4 ppb (0) N/A 4.0 ppb (4) N/A N/A 52.0 ppb (40) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 8 p.m. 7.7 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 41.0 ppb (32) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 19, 2019, 7 p.m. 9.4 ppb (9) 2.1 ppb (2) N/A 7.0 ppb (6) N/A N/A 31.0 ppb (24) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 19, 2019, 6 p.m. 9.4 ppb (9) 2.2 ppb (2) N/A 7.0 ppb (6) N/A N/A 28.0 ppb (22) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 19, 2019, 5 p.m. 14.0 ppb (13) 5.1 ppb (5) N/A 9.0 ppb (8) N/A N/A 23.0 ppb (18) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 4 p.m. 15.7 ppb (15) 7.8 ppb (7) N/A 8.0 ppb (7) N/A N/A 16.0 ppb (12) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 19, 2019, 3 p.m. 15.6 ppb (14) 7.9 ppb (7) N/A 8.0 ppb (7) N/A N/A 8.0 ppb (6) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 2 p.m. 32.0 ppb (30) 20.3 ppb (19) N/A 12.0 ppb (11) N/A N/A 3.0 ppb (2) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 1 p.m. 21.6 ppb (20) 11.7 ppb (11) N/A 10.0 ppb (9) N/A N/A 1.0 ppb (1) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 19, 2019, noon 11.6 ppb (11) 3.3 ppb (3) N/A 8.0 ppb (7) N/A N/A 4.0 ppb (3) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 9.0 μg/m3 (38) 38.0
 
March 19, 2019, 10 a.m. 7.1 ppb (7) 1.3 ppb (1) N/A 6.0 ppb (6) N/A N/A 6.0 ppb (5) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 19, 2019, 9 a.m. 8.1 ppb (8) 0.6 ppb (1) N/A 8.0 ppb (7) N/A N/A 5.0 ppb (4) N/A N/A 14.0 μg/m3 (54) 54.0
 
March 19, 2019, 8 a.m. 10.3 ppb (10) 0.3 ppb (0) N/A 10.0 ppb (9) N/A N/A 5.0 ppb (4) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 19, 2019, 7 a.m. 8.1 ppb (8) 0.6 ppb (1) N/A 8.0 ppb (7) N/A N/A 11.0 ppb (8) N/A N/A 17.0 μg/m3 (61) 61.0
 
March 19, 2019, 6 a.m. 20.1 ppb (19) 0.7 ppb (1) N/A 19.0 ppb (18) N/A N/A 8.0 ppb (6) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 19, 2019, 5 a.m. 19.5 ppb (18) 1.1 ppb (1) N/A 19.0 ppb (18) N/A N/A 11.0 ppb (8) N/A N/A 14.0 μg/m3 (54) 54.0
 
March 19, 2019, 4 a.m. 9.4 ppb (9) 0.1 ppb (0) N/A 9.0 ppb (8) N/A N/A 24.0 ppb (18) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 19, 2019, 3 a.m. 3.6 ppb (3) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 34.0 ppb (26) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 19, 2019, 2 a.m. 4.6 ppb (4) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 41.0 ppb (32) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 19, 2019, 1 a.m. 3.8 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 51.0 ppb (39) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 19, 2019, midnight 4.1 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A N/A 59.0 ppb (45) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 11 p.m. 4.2 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 59.0 ppb (45) N/A N/A 10.0 μg/m3 (42) 45.0
 
March 18, 2019, 10 p.m. 4.1 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 58.0 ppb (45) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 18, 2019, 9 p.m. 6.0 ppb (6) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 55.0 ppb (42) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 8 p.m. 4.2 ppb (4) 0.3 ppb (0) N/A 4.0 ppb (4) N/A N/A 53.0 ppb (41) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 7 p.m. 5.6 ppb (5) 0.9 ppb (1) N/A 5.0 ppb (5) N/A N/A 46.0 ppb (35) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 6 p.m. 7.8 ppb (7) 1.8 ppb (2) N/A 6.0 ppb (6) N/A N/A 34.0 ppb (26) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 5 p.m. 10.3 ppb (10) 3.1 ppb (3) N/A 7.0 ppb (6) N/A N/A 25.0 ppb (19) N/A N/A 18.0 μg/m3 (63) 63.0
 
March 18, 2019, 4 p.m. 9.7 ppb (9) 3.5 ppb (3) N/A 6.0 ppb (6) N/A N/A 22.0 ppb (17) N/A N/A 14.0 μg/m3 (54) 54.0
 
March 18, 2019, 3 p.m. 18.0 ppb (17) 9.0 ppb (8) N/A 9.0 ppb (8) N/A N/A 11.0 ppb (8) N/A N/A 6.0 μg/m3 (25) 25.0
 
March 18, 2019, 2 p.m. 11.2 ppb (10) 3.3 ppb (3) N/A 8.0 ppb (7) N/A N/A 9.0 ppb (7) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 1 p.m. 8.8 ppb (8) 1.9 ppb (2) N/A 7.0 ppb (6) N/A N/A 4.0 ppb (3) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 18, 2019, noon 6.6 ppb (6) 1.6 ppb (1) N/A 5.0 ppb (5) N/A N/A 7.0 ppb (5) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 18, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
March 18, 2019, 10 a.m. 5.7 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 6.0 ppb (5) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 18, 2019, 9 a.m. 5.6 ppb (5) 0.2 ppb (0) N/A 5.0 ppb (5) N/A N/A 7.0 ppb (5) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 18, 2019, 8 a.m. 14.5 ppb (13) 1.8 ppb (2) N/A 13.0 ppb (12) N/A N/A 5.0 ppb (4) N/A N/A 14.0 μg/m3 (54) 54.0
 
March 18, 2019, 7 a.m. 15.6 ppb (14) 2.2 ppb (2) N/A 13.0 ppb (12) N/A N/A 6.0 ppb (5) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 18, 2019, 6 a.m. 11.1 ppb (10) 0.2 ppb (0) N/A 11.0 ppb (10) N/A N/A 14.0 ppb (11) N/A N/A 19.0 μg/m3 (65) 65.0
 
March 18, 2019, 5 a.m. 11.9 ppb (11) 0.3 ppb (0) N/A 12.0 ppb (11) N/A N/A 23.0 ppb (18) N/A N/A 14.0 μg/m3 (54) 54.0
 
March 18, 2019, 4 a.m. 9.8 ppb (9) 0.2 ppb (0) N/A 10.0 ppb (9) N/A N/A 29.0 ppb (22) N/A N/A 19.0 μg/m3 (65) 65.0
 
March 18, 2019, 3 a.m. 14.3 ppb (13) 0.1 ppb (0) N/A 14.0 ppb (13) N/A N/A 26.0 ppb (20) N/A N/A 16.0 μg/m3 (59) 59.0
 
March 18, 2019, 2 a.m. 8.6 ppb (8) 0.1 ppb (0) N/A 9.0 ppb (8) N/A N/A 37.0 ppb (28) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, 1 a.m. 3.0 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 47.0 ppb (36) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 18, 2019, midnight 5.0 ppb (5) 1.4 ppb (1) N/A 4.0 ppb (4) N/A N/A 51.0 ppb (39) N/A N/A 7.0 μg/m3 (29) 39.0
 
March 17, 2019, 11 p.m. 3.6 ppb (3) 0.7 ppb (1) N/A 3.0 ppb (3) N/A N/A 56.0 ppb (43) N/A N/A 8.0 μg/m3 (33) 43.0
 
March 17, 2019, 10 p.m. 3.0 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 55.0 ppb (42) N/A N/A 8.0 μg/m3 (33) 42.0
 
March 17, 2019, 9 p.m. 2.8 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 55.0 ppb (42) N/A N/A 5.0 μg/m3 (21) 42.0
 
March 17, 2019, 8 p.m. 2.7 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 52.0 ppb (40) N/A N/A 6.0 μg/m3 (25) 40.0
 
March 17, 2019, 7 p.m. 3.6 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 45.0 ppb (35) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 6 p.m. 4.2 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 38.0 ppb (29) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 5 p.m. 7.7 ppb (7) 2.1 ppb (2) N/A 6.0 ppb (6) N/A N/A 29.0 ppb (22) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 4 p.m. 7.3 ppb (7) 2.4 ppb (2) N/A 5.0 ppb (5) N/A N/A 18.0 ppb (14) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 17, 2019, 3 p.m. 11.2 ppb (10) 4.5 ppb (4) N/A 7.0 ppb (6) N/A N/A 11.0 ppb (8) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 17, 2019, 2 p.m. 10.3 ppb (10) 2.2 ppb (2) N/A 8.0 ppb (7) N/A N/A 5.0 ppb (4) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 17, 2019, 1 p.m. 5.9 ppb (5) 1.2 ppb (1) N/A 5.0 ppb (5) N/A N/A 9.0 ppb (7) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 17, 2019, noon 7.7 ppb (7) 0.3 ppb (0) N/A 7.0 ppb (6) N/A N/A 9.0 ppb (7) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 17, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 14.0 μg/m3 (54) 54.0
 
March 17, 2019, 10 a.m. 4.3 ppb (4) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 16.0 ppb (12) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 17, 2019, 9 a.m. 3.2 ppb (3) -0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 18.0 ppb (14) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 17, 2019, 8 a.m. 6.8 ppb (6) 0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 15.0 ppb (12) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 17, 2019, 7 a.m. 9.3 ppb (9) 0.1 ppb (0) N/A 9.0 ppb (8) N/A N/A 13.0 ppb (10) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 17, 2019, 6 a.m. 9.4 ppb (9) 0.3 ppb (0) N/A 9.0 ppb (8) N/A N/A 13.0 ppb (10) N/A N/A 29.0 μg/m3 (86) 86.0
 
March 17, 2019, 5 a.m. 9.8 ppb (9) -0.1 ppb (0) N/A 10.0 ppb (9) N/A N/A 18.0 ppb (14) N/A N/A 19.0 μg/m3 (65) 65.0
 
March 17, 2019, 4 a.m. 11.4 ppb (11) 0.1 ppb (0) N/A 11.0 ppb (10) N/A N/A 22.0 ppb (17) N/A N/A 14.0 μg/m3 (54) 54.0
 
March 17, 2019, 3 a.m. 6.1 ppb (6) -0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 31.0 ppb (24) N/A N/A 16.0 μg/m3 (59) 59.0
 
March 17, 2019, 2 a.m. 5.5 ppb (5) 0.0 ppb (0) N/A 6.0 ppb (6) N/A N/A 41.0 ppb (32) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, 1 a.m. 3.2 ppb (3) -0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 51.0 ppb (39) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 17, 2019, midnight 3.1 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 55.0 ppb (42) N/A N/A 18.0 μg/m3 (63) 63.0
 
March 16, 2019, 11 p.m. 3.6 ppb (3) 0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 57.0 ppb (44) N/A N/A 10.0 μg/m3 (42) 44.0
 
March 16, 2019, 10 p.m. 3.0 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 54.0 ppb (42) N/A N/A 5.0 μg/m3 (21) 42.0
 
March 16, 2019, 9 p.m. 2.7 ppb (3) 0.1 ppb (0) N/A 3.0 ppb (3) N/A N/A 50.0 ppb (38) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 16, 2019, 8 p.m. 3.2 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 48.0 ppb (37) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 16, 2019, 7 p.m. 4.2 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 43.0 ppb (33) N/A N/A 14.0 μg/m3 (54) 54.0
 
March 16, 2019, 6 p.m. 6.5 ppb (6) 1.4 ppb (1) N/A 5.0 ppb (5) N/A N/A 33.0 ppb (25) N/A N/A 18.0 μg/m3 (63) 63.0
 
March 16, 2019, 5 p.m. 6.2 ppb (6) 1.3 ppb (1) N/A 5.0 ppb (5) N/A N/A 29.0 ppb (22) N/A N/A 19.0 μg/m3 (65) 65.0
 
March 16, 2019, 4 p.m. 9.0 ppb (8) 2.9 ppb (3) N/A 6.0 ppb (6) N/A N/A 20.0 ppb (15) N/A N/A 14.0 μg/m3 (54) 54.0
 
March 16, 2019, 3 p.m. 7.7 ppb (7) 2.8 ppb (3) N/A 5.0 ppb (5) N/A N/A 11.0 ppb (8) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 16, 2019, 2 p.m. 6.9 ppb (6) 0.9 ppb (1) N/A 6.0 ppb (6) N/A N/A 9.0 ppb (7) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 16, 2019, 1 p.m. 12.0 ppb (11) 3.3 ppb (3) N/A 9.0 ppb (8) N/A N/A 4.0 ppb (3) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 16, 2019, noon N/A N/A N/A N/A N/A N/A N/A N/A N/A 12.0 μg/m3 (50) 50.0
 
March 16, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 16.0 μg/m3 (59) 59.0
 
March 16, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
March 16, 2019, 9 a.m. 8.7 ppb (8) 0.2 ppb (0) N/A 9.0 ppb (8) N/A N/A 4.0 ppb (3) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 16, 2019, 8 a.m. 5.6 ppb (5) 0.2 ppb (0) N/A 6.0 ppb (6) N/A N/A 8.0 ppb (6) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 16, 2019, 3 a.m. 12.2 ppb (11) -0.1 ppb (0) N/A 12.0 ppb (11) N/A N/A 30.0 ppb (23) N/A N/A 18.0 μg/m3 (63) 63.0
 
March 16, 2019, 2 a.m. 9.6 ppb (9) -0.1 ppb (0) N/A 10.0 ppb (9) N/A N/A 36.0 ppb (28) N/A N/A 16.0 μg/m3 (59) 59.0
 
March 16, 2019, 1 a.m. 3.4 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A N/A 52.0 ppb (40) N/A N/A 9.0 μg/m3 (38) 40.0
 
March 16, 2019, midnight 4.1 ppb (4) 0.2 ppb (0) N/A 4.0 ppb (4) N/A N/A 53.0 ppb (41) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 15, 2019, 11 p.m. 3.4 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 54.0 ppb (42) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 15, 2019, 10 p.m. 5.5 ppb (5) 0.8 ppb (1) N/A 5.0 ppb (5) N/A N/A 51.0 ppb (39) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 15, 2019, 9 p.m. 4.3 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 51.0 ppb (39) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 15, 2019, 8 p.m. 4.1 ppb (4) 0.5 ppb (0) N/A 4.0 ppb (4) N/A N/A 49.0 ppb (38) N/A N/A 8.0 μg/m3 (33) 38.0
 
March 15, 2019, 7 p.m. 4.8 ppb (4) 0.6 ppb (1) N/A 4.0 ppb (4) N/A N/A 44.0 ppb (34) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 15, 2019, 6 p.m. 7.2 ppb (7) 1.6 ppb (1) N/A 6.0 ppb (6) N/A N/A 33.0 ppb (25) N/A N/A 16.0 μg/m3 (59) 59.0
 
March 15, 2019, 5 p.m. 9.7 ppb (9) 2.8 ppb (3) N/A 7.0 ppb (6) N/A N/A 26.0 ppb (20) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 15, 2019, 4 p.m. 9.0 ppb (8) 3.3 ppb (3) N/A 6.0 ppb (6) N/A N/A 19.0 ppb (15) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 15, 2019, 3 p.m. 44.9 ppb (42) 31.2 ppb (29) N/A 14.0 ppb (13) N/A N/A 6.0 ppb (5) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 15, 2019, 2 p.m. 28.8 ppb (27) 19.4 ppb (18) N/A 10.0 ppb (9) N/A N/A 2.0 ppb (2) N/A N/A 16.0 μg/m3 (59) 59.0
 
March 15, 2019, 1 p.m. 18.3 ppb (17) 7.7 ppb (7) N/A 11.0 ppb (10) N/A N/A 1.0 ppb (1) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 15, 2019, noon 10.5 ppb (10) 1.5 ppb (1) N/A 9.0 ppb (8) N/A N/A 3.0 ppb (2) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 15, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
March 15, 2019, 10 a.m. 5.3 ppb (5) 0.5 ppb (0) N/A 5.0 ppb (5) N/A N/A 8.0 ppb (6) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 15, 2019, 9 a.m. 5.5 ppb (5) 0.3 ppb (0) N/A 5.0 ppb (5) N/A N/A 9.0 ppb (7) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 15, 2019, 8 a.m. 5.1 ppb (5) 0.0 ppb (0) N/A 5.0 ppb (5) N/A N/A 9.0 ppb (7) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 15, 2019, 7 a.m. 9.6 ppb (9) 0.4 ppb (0) N/A 9.0 ppb (8) N/A N/A 10.0 ppb (8) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 15, 2019, 6 a.m. 11.7 ppb (11) 0.6 ppb (1) N/A 11.0 ppb (10) N/A N/A 11.0 ppb (8) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 15, 2019, 5 a.m. 17.6 ppb (16) 1.4 ppb (1) N/A 16.0 ppb (15) N/A N/A 12.0 ppb (9) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 15, 2019, 4 a.m. 15.0 ppb (14) 0.1 ppb (0) N/A 15.0 ppb (14) N/A N/A 23.0 ppb (18) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 15, 2019, 3 a.m. 13.9 ppb (13) 0.1 ppb (0) N/A 14.0 ppb (13) N/A N/A 29.0 ppb (22) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 15, 2019, 2 a.m. 12.6 ppb (12) 0.1 ppb (0) N/A 13.0 ppb (12) N/A N/A 32.0 ppb (25) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 15, 2019, 1 a.m. 4.0 ppb (4) -0.1 ppb (0) N/A 4.0 ppb (4) N/A N/A 45.0 ppb (35) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 15, 2019, midnight 3.2 ppb (3) 0.2 ppb (0) N/A 3.0 ppb (3) N/A N/A 46.0 ppb (35) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 14, 2019, 11 p.m. 2.5 ppb (2) 0.2 ppb (0) N/A 2.0 ppb (2) N/A N/A 46.0 ppb (35) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 14, 2019, 10 p.m. 3.2 ppb (3) 0.3 ppb (0) N/A 3.0 ppb (3) N/A N/A 44.0 ppb (34) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 14, 2019, 9 p.m. 4.4 ppb (4) 0.8 ppb (1) N/A 4.0 ppb (4) N/A N/A 42.0 ppb (32) N/A N/A 12.0 μg/m3 (50) 50.0
 
March 14, 2019, 8 p.m. 5.5 ppb (5) 1.2 ppb (1) N/A 4.0 ppb (4) N/A N/A 37.0 ppb (28) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 14, 2019, 7 p.m. 7.3 ppb (7) 2.1 ppb (2) N/A 5.0 ppb (5) N/A N/A 32.0 ppb (25) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 14, 2019, 6 p.m. 8.4 ppb (8) 2.7 ppb (3) N/A 6.0 ppb (6) N/A N/A 28.0 ppb (22) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 14, 2019, 5 p.m. 13.3 ppb (12) 5.1 ppb (5) N/A 8.0 ppb (7) N/A N/A 21.0 ppb (16) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 14, 2019, 4 p.m. 14.9 ppb (14) 6.9 ppb (6) N/A 8.0 ppb (7) N/A N/A 14.0 ppb (11) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 14, 2019, 3 p.m. 14.4 ppb (13) 7.7 ppb (7) N/A 7.0 ppb (6) N/A N/A 9.0 ppb (7) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 14, 2019, 2 p.m. 21.5 ppb (20) 11.9 ppb (11) N/A 10.0 ppb (9) N/A N/A 3.0 ppb (2) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 14, 2019, 1 p.m. 14.7 ppb (14) 4.5 ppb (4) N/A 10.0 ppb (9) N/A N/A 2.0 ppb (2) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 14, 2019, noon 17.6 ppb (16) 5.5 ppb (5) N/A 12.0 ppb (11) N/A N/A 2.0 ppb (2) N/A N/A 8.0 μg/m3 (33) 33.0
 
March 14, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 10.0 μg/m3 (42) 42.0
 
March 14, 2019, 10 a.m. 10.6 ppb (10) 2.6 ppb (2) N/A 8.0 ppb (7) N/A N/A 6.0 ppb (5) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 14, 2019, 9 a.m. 8.3 ppb (8) 0.3 ppb (0) N/A 8.0 ppb (7) N/A N/A 8.0 ppb (6) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 14, 2019, 8 a.m. 6.6 ppb (6) 0.1 ppb (0) N/A 6.0 ppb (6) N/A N/A 11.0 ppb (8) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 14, 2019, 7 a.m. 7.5 ppb (7) 0.2 ppb (0) N/A 7.0 ppb (6) N/A N/A 15.0 ppb (12) N/A N/A 6.0 μg/m3 (25) 25.0
 
March 14, 2019, 6 a.m. 7.1 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (6) N/A N/A 22.0 ppb (17) N/A N/A 6.0 μg/m3 (25) 25.0
 
March 14, 2019, 5 a.m. 9.4 ppb (9) 0.1 ppb (0) N/A 9.0 ppb (8) N/A N/A 25.0 ppb (19) N/A N/A 9.0 μg/m3 (38) 38.0
 
March 14, 2019, 4 a.m. 8.9 ppb (8) -0.1 ppb (0) N/A 9.0 ppb (8) N/A N/A 27.0 ppb (21) N/A N/A 7.0 μg/m3 (29) 29.0