AQSQID: 000100202

Site Name: Prg Plaza 400

Location: Prince George, CC

Reporting: True, Located: True

Current AQI: 62.0

Prince George CC, CA: 53.9147, -122.7419

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 22, 2019, 10 a.m. N/A 17.6 ppb (16) N/A 30.0 ppb (28) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 17.6 μg/m3 (62) 62.0
 
March 22, 2019, 9 a.m. N/A 31.6 ppb (29) N/A 30.0 ppb (28) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 21.2 μg/m3 (70) 70.0
 
March 22, 2019, 8 a.m. N/A 32.2 ppb (30) N/A 31.0 ppb (29) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 23.3 μg/m3 (74) 74.0
 
March 22, 2019, 7 a.m. N/A 33.6 ppb (31) N/A 34.0 ppb (31) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 21.3 μg/m3 (70) 70.0
 
March 22, 2019, 6 a.m. N/A 19.3 ppb (18) N/A 31.0 ppb (29) N/A -1.0 ppb (0) 4.0 ppb (3) N/A N/A 19.2 μg/m3 (65) 65.0
 
March 22, 2019, 5 a.m. N/A 30.6 ppb (28) N/A 36.0 ppb (33) N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 25.6 μg/m3 (79) 79.0
 
March 22, 2019, 4 a.m. N/A 25.0 ppb (23) N/A 39.0 ppb (36) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 29.2 μg/m3 (87) 87.0
 
March 22, 2019, 3 a.m. N/A 20.2 ppb (19) N/A 40.0 ppb (37) N/A 0.0 ppb (0) 5.0 ppb (4) N/A N/A 29.2 μg/m3 (87) 87.0
 
March 22, 2019, 2 a.m. N/A 26.8 ppb (25) N/A 44.0 ppb (41) N/A -1.0 ppb (0) 4.0 ppb (3) N/A N/A 34.5 μg/m3 (98) 98.0
 
March 22, 2019, 1 a.m. N/A 14.8 ppb (14) N/A 18.0 ppb (17) N/A -2.0 ppb (0) 35.0 ppb (27) N/A N/A 13.4 μg/m3 (53) 53.0
 
March 22, 2019, midnight N/A 15.2 ppb (14) N/A 18.0 ppb (17) N/A -1.0 ppb (0) 37.0 ppb (28) N/A N/A 11.8 μg/m3 (49) 49.0
 
March 21, 2019, 11 p.m. N/A 12.0 ppb (11) N/A 17.0 ppb (16) N/A -1.0 ppb (0) 39.0 ppb (30) N/A N/A 13.4 μg/m3 (53) 53.0
 
March 21, 2019, 10 p.m. N/A 12.2 ppb (11) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A 17.5 μg/m3 (62) 62.0
 
March 21, 2019, 9 p.m. N/A 8.3 ppb (8) N/A 19.0 ppb (18) N/A 7.0 ppb (10) 45.0 ppb (35) N/A N/A 20.7 μg/m3 (69) 69.0
 
March 21, 2019, 8 p.m. N/A 7.2 ppb (7) N/A 16.0 ppb (15) N/A 5.0 ppb (7) 43.0 ppb (33) N/A N/A 24.8 μg/m3 (77) 77.0
 
March 21, 2019, 7 p.m. N/A 11.0 ppb (10) N/A 20.0 ppb (19) N/A 5.0 ppb (7) 33.0 ppb (25) N/A N/A 28.3 μg/m3 (85) 85.0
 
March 21, 2019, 6 p.m. N/A 21.8 ppb (20) N/A 36.0 ppb (33) N/A 21.0 ppb (30) 28.0 ppb (22) N/A N/A 68.0 μg/m3 (157) 157.0
 
March 21, 2019, 5 p.m. N/A 40.3 ppb (37) N/A 37.0 ppb (34) N/A 12.0 ppb (17) 14.0 ppb (11) N/A N/A 53.6 μg/m3 (145) 145.0
 
March 21, 2019, 4 p.m. N/A 75.4 ppb (73) N/A 36.0 ppb (33) N/A 1.0 ppb (1) 5.0 ppb (4) N/A N/A 29.6 μg/m3 (87) 87.0
 
March 21, 2019, 3 p.m. N/A 82.9 ppb (81) N/A 35.0 ppb (32) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 22.9 μg/m3 (73) 81.0
 
March 21, 2019, 2 p.m. N/A 62.8 ppb (59) N/A 32.0 ppb (30) N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 19.7 μg/m3 (66) 66.0
 
March 21, 2019, 1 p.m. N/A 57.1 ppb (53) N/A 32.0 ppb (30) N/A N/A 1.0 ppb (1) N/A N/A 18.1 μg/m3 (63) 63.0
 
March 21, 2019, noon N/A N/A N/A N/A N/A -1.0 ppb (0) N/A N/A N/A 17.1 μg/m3 (61) 61.0
 
March 21, 2019, 11 a.m. N/A 11.4 ppb (11) N/A 27.0 ppb (25) N/A -1.0 ppb (0) 2.0 ppb (2) N/A N/A 15.1 μg/m3 (57) 57.0
 
March 21, 2019, 10 a.m. N/A 15.0 ppb (14) N/A 29.0 ppb (27) N/A -1.0 ppb (0) 3.0 ppb (2) N/A N/A 19.1 μg/m3 (65) 65.0
 
March 21, 2019, 9 a.m. N/A 31.8 ppb (29) N/A 34.0 ppb (31) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 17.9 μg/m3 (63) 63.0
 
March 21, 2019, 8 a.m. N/A 33.5 ppb (31) N/A 35.0 ppb (32) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 18.4 μg/m3 (64) 64.0
 
March 21, 2019, 7 a.m. N/A 42.8 ppb (40) N/A 33.0 ppb (31) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 22.0 μg/m3 (71) 71.0
 
March 21, 2019, 6 a.m. N/A 23.8 ppb (22) N/A 31.0 ppb (29) N/A -1.0 ppb (0) 5.0 ppb (4) N/A N/A 20.3 μg/m3 (68) 68.0
 
March 21, 2019, 5 a.m. N/A 22.7 ppb (21) N/A 35.0 ppb (32) N/A 0.0 ppb (0) 6.0 ppb (5) N/A N/A 23.2 μg/m3 (74) 74.0
 
March 21, 2019, 4 a.m. N/A 35.4 ppb (33) N/A 42.0 ppb (39) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 30.4 μg/m3 (89) 89.0
 
March 21, 2019, 3 a.m. N/A 31.7 ppb (29) N/A 46.0 ppb (43) N/A 1.0 ppb (1) 2.0 ppb (2) N/A N/A 32.8 μg/m3 (94) 94.0
 
March 21, 2019, 2 a.m. N/A 42.2 ppb (39) N/A 50.0 ppb (46) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 51.8 μg/m3 (141) 141.0
 
March 21, 2019, 1 a.m. N/A 14.4 ppb (13) N/A 32.0 ppb (30) N/A 1.0 ppb (1) 25.0 ppb (19) N/A N/A 32.9 μg/m3 (94) 94.0
 
March 21, 2019, midnight N/A 13.9 ppb (13) N/A 26.0 ppb (24) N/A 2.0 ppb (3) 37.0 ppb (28) N/A N/A 24.8 μg/m3 (77) 77.0
 
March 20, 2019, 11 p.m. N/A 12.0 ppb (11) N/A 17.0 ppb (16) N/A 2.0 ppb (3) 40.0 ppb (31) N/A N/A 11.7 μg/m3 (49) 49.0
 
March 20, 2019, 10 p.m. N/A 9.6 ppb (9) N/A 15.0 ppb (14) N/A 3.0 ppb (4) 41.0 ppb (32) N/A N/A 10.8 μg/m3 (45) 45.0
 
March 20, 2019, 9 p.m. N/A 10.4 ppb (10) N/A 18.0 ppb (17) N/A 8.0 ppb (11) 40.0 ppb (31) N/A N/A 15.0 μg/m3 (56) 56.0
 
March 20, 2019, 8 p.m. N/A 11.8 ppb (11) N/A 22.0 ppb (20) N/A 6.0 ppb (9) 38.0 ppb (29) N/A N/A 17.6 μg/m3 (62) 62.0
 
March 20, 2019, 7 p.m. N/A 17.5 ppb (16) N/A 41.0 ppb (38) N/A 16.0 ppb (23) 34.0 ppb (26) N/A N/A 49.4 μg/m3 (135) 135.0
 
March 20, 2019, 6 p.m. N/A 24.4 ppb (23) N/A 41.0 ppb (38) N/A 21.0 ppb (30) 27.0 ppb (21) N/A N/A 57.4 μg/m3 (151) 151.0
 
March 20, 2019, 5 p.m. N/A 54.8 ppb (51) N/A 46.0 ppb (43) N/A 9.0 ppb (13) 12.0 ppb (9) N/A N/A 60.6 μg/m3 (153) 153.0
 
March 20, 2019, 4 p.m. N/A 142.1 ppb (108) N/A 50.0 ppb (46) N/A 3.0 ppb (4) 3.0 ppb (2) N/A N/A 47.0 μg/m3 (129) 129.0
 
March 20, 2019, 3 p.m. N/A 114.8 ppb (103) N/A 40.0 ppb (37) N/A 1.0 ppb (1) 2.0 ppb (2) N/A N/A 37.1 μg/m3 (104) 104.0
 
March 20, 2019, 2 p.m. N/A 97.0 ppb (96) N/A 37.0 ppb (34) N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 30.0 μg/m3 (88) 96.0
 
March 20, 2019, 1 p.m. N/A 74.0 ppb (71) N/A 35.0 ppb (32) N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 26.8 μg/m3 (81) 81.0
 
March 20, 2019, noon N/A 79.8 ppb (77) N/A 36.0 ppb (33) N/A N/A 1.0 ppb (1) N/A N/A 27.3 μg/m3 (83) 83.0
 
March 20, 2019, 11 a.m. N/A N/A N/A N/A N/A -1.0 ppb (0) N/A N/A N/A 26.9 μg/m3 (82) 82.0
 
March 20, 2019, 10 a.m. N/A 50.0 ppb (46) N/A 36.0 ppb (33) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 27.2 μg/m3 (82) 82.0
 
March 20, 2019, 9 a.m. N/A 46.5 ppb (43) N/A 37.0 ppb (34) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 25.0 μg/m3 (78) 78.0
 
March 20, 2019, 8 a.m. N/A 40.8 ppb (38) N/A 35.0 ppb (32) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 24.4 μg/m3 (76) 76.0
 
March 20, 2019, 7 a.m. N/A 37.6 ppb (35) N/A 38.0 ppb (35) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 24.4 μg/m3 (76) 76.0
 
March 20, 2019, 6 a.m. N/A 45.3 ppb (42) N/A 42.0 ppb (39) N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 25.1 μg/m3 (78) 78.0
 
March 20, 2019, 5 a.m. N/A 38.1 ppb (35) N/A 44.0 ppb (41) N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 24.7 μg/m3 (77) 77.0
 
March 20, 2019, 4 a.m. N/A 32.5 ppb (30) N/A 45.0 ppb (42) N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 29.2 μg/m3 (87) 87.0
 
March 20, 2019, 3 a.m. N/A 26.2 ppb (24) N/A 48.0 ppb (44) N/A 1.0 ppb (1) 2.0 ppb (2) N/A N/A 32.5 μg/m3 (94) 94.0
 
March 20, 2019, 2 a.m. N/A 16.5 ppb (15) N/A 48.0 ppb (44) N/A 2.0 ppb (3) 7.0 ppb (5) N/A N/A 29.9 μg/m3 (88) 88.0
 
March 20, 2019, 1 a.m. N/A 12.5 ppb (12) N/A 36.0 ppb (33) N/A 3.0 ppb (4) 25.0 ppb (19) N/A N/A 27.6 μg/m3 (83) 83.0
 
March 20, 2019, midnight N/A 12.1 ppb (11) N/A 27.0 ppb (25) N/A 3.0 ppb (4) 33.0 ppb (25) N/A N/A 22.0 μg/m3 (71) 71.0
 
March 19, 2019, 11 p.m. N/A 10.8 ppb (10) N/A 19.0 ppb (18) N/A 1.0 ppb (1) 38.0 ppb (29) N/A N/A 15.5 μg/m3 (57) 57.0
 
March 19, 2019, 10 p.m. N/A 11.1 ppb (10) N/A 16.0 ppb (15) N/A 1.0 ppb (1) 36.0 ppb (28) N/A N/A 10.7 μg/m3 (45) 45.0
 
March 19, 2019, 9 p.m. N/A 7.3 ppb (7) N/A 16.0 ppb (15) N/A 6.0 ppb (9) 43.0 ppb (33) N/A N/A 14.2 μg/m3 (55) 55.0
 
March 19, 2019, 8 p.m. N/A 8.9 ppb (8) N/A 21.0 ppb (19) N/A 20.0 ppb (29) 42.0 ppb (32) N/A N/A 24.0 μg/m3 (76) 76.0
 
March 19, 2019, 7 p.m. N/A 7.6 ppb (7) N/A 16.0 ppb (15) N/A 10.0 ppb (14) 37.0 ppb (28) N/A N/A 18.1 μg/m3 (63) 63.0
 
March 19, 2019, 6 p.m. N/A 15.1 ppb (14) N/A 23.0 ppb (21) N/A 6.0 ppb (9) 27.0 ppb (21) N/A N/A 20.1 μg/m3 (67) 67.0
 
March 19, 2019, 5 p.m. N/A 25.5 ppb (24) N/A 27.0 ppb (25) N/A 1.0 ppb (1) 18.0 ppb (14) N/A N/A 31.1 μg/m3 (91) 91.0
 
March 19, 2019, 4 p.m. N/A 69.6 ppb (67) N/A 35.0 ppb (32) N/A 0.0 ppb (0) 5.0 ppb (4) N/A N/A 35.9 μg/m3 (101) 101.0
 
March 19, 2019, 3 p.m. N/A 113.0 ppb (102) N/A 35.0 ppb (32) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 32.3 μg/m3 (93) 102.0
 
March 19, 2019, 2 p.m. N/A 106.2 ppb (101) N/A 34.0 ppb (31) N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 23.2 μg/m3 (74) 101.0
 
March 19, 2019, 1 p.m. N/A 70.5 ppb (68) N/A 30.0 ppb (28) N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 18.9 μg/m3 (65) 68.0
 
March 19, 2019, noon N/A 46.7 ppb (43) N/A 28.0 ppb (26) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 18.6 μg/m3 (64) 64.0
 
March 19, 2019, 11 a.m. N/A 42.5 ppb (39) N/A 29.0 ppb (27) N/A N/A 1.0 ppb (1) N/A N/A 18.4 μg/m3 (64) 64.0
 
March 19, 2019, 10 a.m. N/A N/A N/A N/A N/A -1.0 ppb (0) N/A N/A N/A 19.7 μg/m3 (66) 66.0
 
March 19, 2019, 9 a.m. N/A 38.5 ppb (36) N/A 32.0 ppb (30) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 20.4 μg/m3 (68) 68.0
 
March 19, 2019, 8 a.m. N/A 37.1 ppb (34) N/A 32.0 ppb (30) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 20.7 μg/m3 (69) 69.0
 
March 19, 2019, 7 a.m. N/A 35.3 ppb (33) N/A 34.0 ppb (31) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 22.2 μg/m3 (72) 72.0
 
March 19, 2019, 6 a.m. N/A 31.9 ppb (30) N/A 34.0 ppb (31) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 21.1 μg/m3 (69) 69.0
 
March 19, 2019, 5 a.m. N/A 35.9 ppb (33) N/A 36.0 ppb (33) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 20.3 μg/m3 (68) 68.0
 
March 19, 2019, 4 a.m. N/A 40.7 ppb (38) N/A 37.0 ppb (34) N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 20.3 μg/m3 (68) 68.0
 
March 19, 2019, 3 a.m. N/A 46.8 ppb (43) N/A 41.0 ppb (38) N/A 1.0 ppb (1) 1.0 ppb (1) N/A N/A 22.9 μg/m3 (73) 73.0
 
March 19, 2019, 2 a.m. N/A 30.2 ppb (28) N/A 38.0 ppb (35) N/A 1.0 ppb (1) 8.0 ppb (6) N/A N/A 19.6 μg/m3 (66) 66.0
 
March 19, 2019, 1 a.m. N/A 7.5 ppb (7) N/A 17.0 ppb (16) N/A -1.0 ppb (0) 31.0 ppb (24) N/A N/A 7.3 μg/m3 (30) 30.0
 
March 19, 2019, midnight N/A 6.5 ppb (6) N/A 12.0 ppb (11) N/A -1.0 ppb (0) 36.0 ppb (28) N/A N/A 7.4 μg/m3 (31) 31.0
 
March 18, 2019, 11 p.m. N/A 6.1 ppb (6) N/A 11.0 ppb (10) N/A 2.0 ppb (3) 35.0 ppb (27) N/A N/A 6.9 μg/m3 (29) 29.0
 
March 18, 2019, 10 p.m. N/A 5.6 ppb (5) N/A 10.0 ppb (9) N/A 1.0 ppb (1) 35.0 ppb (27) N/A N/A 6.6 μg/m3 (28) 28.0
 
March 18, 2019, 9 p.m. N/A 4.4 ppb (4) N/A 9.0 ppb (8) N/A 3.0 ppb (4) 38.0 ppb (29) N/A N/A 7.2 μg/m3 (30) 30.0
 
March 18, 2019, 8 p.m. N/A 8.0 ppb (7) N/A 14.0 ppb (13) N/A 5.0 ppb (7) 33.0 ppb (25) N/A N/A 8.3 μg/m3 (35) 35.0
 
March 18, 2019, 7 p.m. N/A 9.4 ppb (9) N/A 16.0 ppb (15) N/A 6.0 ppb (9) 29.0 ppb (22) N/A N/A 11.5 μg/m3 (48) 48.0
 
March 18, 2019, 6 p.m. N/A 12.4 ppb (11) N/A 18.0 ppb (17) N/A 7.0 ppb (10) 24.0 ppb (18) N/A N/A 13.5 μg/m3 (53) 53.0
 
March 18, 2019, 5 p.m. N/A 12.4 ppb (11) N/A 16.0 ppb (15) N/A 4.0 ppb (6) 20.0 ppb (15) N/A N/A 24.0 μg/m3 (76) 76.0
 
March 18, 2019, 4 p.m. N/A 22.1 ppb (20) N/A 21.0 ppb (19) N/A 0.0 ppb (0) 11.0 ppb (8) N/A N/A 19.8 μg/m3 (67) 67.0
 
March 18, 2019, 3 p.m. N/A 81.3 ppb (79) N/A 33.0 ppb (31) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 26.0 μg/m3 (80) 80.0
 
March 18, 2019, 2 p.m. N/A 103.1 ppb (100) N/A 35.0 ppb (32) N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 24.1 μg/m3 (76) 100.0
 
March 18, 2019, 1 p.m. N/A 55.0 ppb (51) N/A 30.0 ppb (28) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 18.5 μg/m3 (64) 64.0
 
March 18, 2019, noon N/A 49.3 ppb (46) N/A 31.0 ppb (29) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 18.6 μg/m3 (64) 64.0
 
March 18, 2019, 11 a.m. N/A 42.0 ppb (39) N/A 32.0 ppb (30) N/A -1.0 ppb (0) 0.0 ppb (0) N/A N/A 18.7 μg/m3 (64) 64.0
 
March 18, 2019, 10 a.m. N/A 49.6 ppb (46) N/A 34.0 ppb (31) N/A N/A 1.0 ppb (1) N/A N/A 19.8 μg/m3 (67) 67.0
 
March 18, 2019, 9 a.m. N/A N/A N/A N/A N/A -1.0 ppb (0) N/A N/A N/A 18.8 μg/m3 (64) 64.0
 
March 18, 2019, 8 a.m. N/A 25.9 ppb (24) N/A 33.0 ppb (31) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 18.0 μg/m3 (63) 63.0
 
March 18, 2019, 7 a.m. N/A 23.2 ppb (21) N/A 34.0 ppb (31) N/A -1.0 ppb (0) 0.0 ppb (0) N/A N/A 17.6 μg/m3 (62) 62.0
 
March 18, 2019, 6 a.m. N/A 32.6 ppb (30) N/A 38.0 ppb (35) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 17.2 μg/m3 (61) 61.0
 
March 18, 2019, 5 a.m. N/A 25.2 ppb (23) N/A 39.0 ppb (36) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 16.3 μg/m3 (59) 59.0
 
March 18, 2019, 4 a.m. N/A 23.0 ppb (21) N/A 38.0 ppb (35) N/A -1.0 ppb (0) 3.0 ppb (2) N/A N/A 14.2 μg/m3 (55) 55.0
 
March 18, 2019, 3 a.m. N/A 22.2 ppb (21) N/A 40.0 ppb (37) N/A 0.0 ppb (0) 4.0 ppb (3) N/A N/A 13.4 μg/m3 (53) 53.0
 
March 18, 2019, 2 a.m. N/A 14.4 ppb (13) N/A 29.0 ppb (27) N/A -1.0 ppb (0) 16.0 ppb (12) N/A N/A 8.1 μg/m3 (34) 34.0
 
March 18, 2019, 1 a.m. N/A 5.1 ppb (5) N/A 10.0 ppb (9) N/A -2.0 ppb (0) 38.0 ppb (29) N/A N/A 4.0 μg/m3 (17) 29.0
 
March 18, 2019, midnight N/A 3.1 ppb (3) N/A 4.0 ppb (4) N/A -2.0 ppb (0) 46.0 ppb (35) N/A N/A 3.4 μg/m3 (14) 35.0
 
March 17, 2019, 11 p.m. N/A 3.3 ppb (3) N/A 6.0 ppb (6) N/A -2.0 ppb (0) 45.0 ppb (35) N/A N/A 3.8 μg/m3 (16) 35.0
 
March 17, 2019, 10 p.m. N/A 3.6 ppb (3) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 48.0 ppb (37) N/A N/A 5.5 μg/m3 (23) 37.0
 
March 17, 2019, 9 p.m. N/A 4.5 ppb (4) N/A 8.0 ppb (7) N/A -1.0 ppb (0) 44.0 ppb (34) N/A N/A 6.0 μg/m3 (25) 34.0
 
March 17, 2019, 8 p.m. N/A 6.4 ppb (6) N/A 13.0 ppb (12) N/A -1.0 ppb (0) 36.0 ppb (28) N/A N/A 10.9 μg/m3 (45) 45.0
 
March 17, 2019, 7 p.m. N/A 9.3 ppb (9) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 27.0 ppb (21) N/A N/A 14.3 μg/m3 (55) 55.0
 
March 17, 2019, 6 p.m. N/A 18.1 ppb (17) N/A 23.0 ppb (21) N/A 1.0 ppb (1) 20.0 ppb (15) N/A N/A 17.2 μg/m3 (61) 61.0
 
March 17, 2019, 5 p.m. N/A 29.3 ppb (27) N/A 29.0 ppb (27) N/A 0.0 ppb (0) 12.0 ppb (9) N/A N/A 38.0 μg/m3 (106) 106.0
 
March 17, 2019, 4 p.m. N/A 30.5 ppb (28) N/A 25.0 ppb (23) N/A -1.0 ppb (0) 7.0 ppb (5) N/A N/A 56.7 μg/m3 (151) 151.0
 
March 17, 2019, 3 p.m. N/A 23.0 ppb (21) N/A 23.0 ppb (21) N/A -1.0 ppb (0) 3.0 ppb (2) N/A N/A 40.3 μg/m3 (112) 112.0
 
March 17, 2019, 2 p.m. N/A 30.4 ppb (28) N/A 26.0 ppb (24) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 16.9 μg/m3 (60) 60.0
 
March 17, 2019, 1 p.m. N/A 13.4 ppb (12) N/A 24.0 ppb (22) N/A -1.0 ppb (0) 3.0 ppb (2) N/A N/A 13.0 μg/m3 (52) 52.0
 
March 17, 2019, noon N/A 16.3 ppb (15) N/A 27.0 ppb (25) N/A -1.0 ppb (0) 2.0 ppb (2) N/A N/A 14.2 μg/m3 (55) 55.0
 
March 17, 2019, 11 a.m. N/A 7.0 ppb (6) N/A 25.0 ppb (23) N/A -1.0 ppb (0) 3.0 ppb (2) N/A N/A 14.5 μg/m3 (55) 55.0
 
March 17, 2019, 10 a.m. N/A 16.8 ppb (16) N/A 31.0 ppb (29) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 14.6 μg/m3 (56) 56.0
 
March 17, 2019, 9 a.m. N/A 23.9 ppb (22) N/A 35.0 ppb (32) N/A N/A 1.0 ppb (1) N/A N/A 19.4 μg/m3 (66) 66.0
 
March 17, 2019, 8 a.m. N/A N/A N/A N/A N/A -1.0 ppb (0) N/A N/A N/A 17.3 μg/m3 (61) 61.0
 
March 17, 2019, 7 a.m. N/A 37.8 ppb (35) N/A 43.0 ppb (40) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 22.5 μg/m3 (72) 72.0
 
March 17, 2019, 6 a.m. N/A 35.9 ppb (33) N/A 43.0 ppb (40) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 23.4 μg/m3 (74) 74.0
 
March 17, 2019, 5 a.m. N/A 31.5 ppb (29) N/A 41.0 ppb (38) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 20.1 μg/m3 (67) 67.0
 
March 17, 2019, 4 a.m. N/A 21.2 ppb (20) N/A 40.0 ppb (37) N/A -1.0 ppb (0) 2.0 ppb (2) N/A N/A 17.5 μg/m3 (62) 62.0
 
March 17, 2019, 3 a.m. N/A 8.3 ppb (8) N/A 30.0 ppb (28) N/A -1.0 ppb (0) 13.0 ppb (10) N/A N/A 12.9 μg/m3 (52) 52.0
 
March 17, 2019, 2 a.m. N/A 2.5 ppb (2) N/A 16.0 ppb (15) N/A -1.0 ppb (0) 30.0 ppb (23) N/A N/A 10.2 μg/m3 (42) 42.0
 
March 17, 2019, 1 a.m. N/A 6.2 ppb (6) N/A 23.0 ppb (21) N/A 0.0 ppb (0) 29.0 ppb (22) N/A N/A 11.9 μg/m3 (50) 50.0
 
March 17, 2019, midnight N/A 2.2 ppb (2) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A 8.2 μg/m3 (34) 34.0
 
March 16, 2019, 11 p.m. N/A 6.3 ppb (6) N/A 20.0 ppb (19) N/A -1.0 ppb (0) 31.0 ppb (24) N/A N/A 8.7 μg/m3 (36) 36.0
 
March 16, 2019, 10 p.m. N/A 3.5 ppb (3) N/A 14.0 ppb (13) N/A 1.0 ppb (1) 37.0 ppb (28) N/A N/A 8.5 μg/m3 (35) 35.0
 
March 16, 2019, 9 p.m. N/A 3.1 ppb (3) N/A 11.0 ppb (10) N/A 5.0 ppb (7) 38.0 ppb (29) N/A N/A 8.3 μg/m3 (35) 35.0
 
March 16, 2019, 8 p.m. N/A 3.5 ppb (3) N/A 10.0 ppb (9) N/A 4.0 ppb (6) 37.0 ppb (28) N/A N/A 10.4 μg/m3 (43) 43.0
 
March 16, 2019, 7 p.m. N/A 6.8 ppb (6) N/A 12.0 ppb (11) N/A 5.0 ppb (7) 30.0 ppb (23) N/A N/A 13.5 μg/m3 (53) 53.0
 
March 16, 2019, 6 p.m. N/A 6.9 ppb (6) N/A 13.0 ppb (12) N/A 5.0 ppb (7) 24.0 ppb (18) N/A N/A 12.2 μg/m3 (50) 50.0
 
March 16, 2019, 5 p.m. N/A 15.7 ppb (15) N/A 17.0 ppb (16) N/A -1.0 ppb (0) 16.0 ppb (12) N/A N/A 14.4 μg/m3 (55) 55.0
 
March 16, 2019, 4 p.m. N/A 11.9 ppb (11) N/A 19.0 ppb (18) N/A -1.0 ppb (0) 11.0 ppb (8) N/A N/A 25.1 μg/m3 (78) 78.0
 
March 16, 2019, 3 p.m. N/A 32.1 ppb (30) N/A 27.0 ppb (25) N/A -1.0 ppb (0) 3.0 ppb (2) N/A N/A 22.0 μg/m3 (71) 71.0
 
March 16, 2019, 2 p.m. N/A 62.5 ppb (59) N/A 34.0 ppb (31) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 22.6 μg/m3 (73) 73.0
 
March 16, 2019, 1 p.m. N/A 59.2 ppb (56) N/A 36.0 ppb (33) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 19.9 μg/m3 (67) 67.0
 
March 16, 2019, noon N/A 36.0 ppb (33) N/A 33.0 ppb (31) N/A -1.0 ppb (0) 0.0 ppb (0) N/A N/A 17.8 μg/m3 (62) 62.0
 
March 16, 2019, 11 a.m. N/A 42.3 ppb (39) N/A 35.0 ppb (32) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 18.4 μg/m3 (64) 64.0
 
March 16, 2019, 10 a.m. N/A 40.8 ppb (38) N/A 37.0 ppb (34) N/A -1.0 ppb (0) 0.0 ppb (0) N/A N/A 18.5 μg/m3 (64) 64.0
 
March 16, 2019, 9 a.m. N/A 50.6 ppb (47) N/A 39.0 ppb (36) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 21.2 μg/m3 (70) 70.0
 
March 16, 2019, 8 a.m. N/A 31.2 ppb (29) N/A 35.0 ppb (32) N/A N/A 3.0 ppb (2) N/A N/A 17.5 μg/m3 (62) 62.0
 
March 16, 2019, 7 a.m. N/A N/A N/A N/A N/A -1.0 ppb (0) N/A N/A N/A 15.1 μg/m3 (57) 57.0
 
March 16, 2019, 6 a.m. N/A 27.2 ppb (25) N/A 39.0 ppb (36) N/A -1.0 ppb (0) 2.0 ppb (2) N/A N/A 15.2 μg/m3 (57) 57.0
 
March 16, 2019, 5 a.m. N/A 36.4 ppb (34) N/A 43.0 ppb (40) N/A -1.0 ppb (0) 1.0 ppb (1) N/A N/A 15.6 μg/m3 (58) 58.0
 
March 16, 2019, 4 a.m. N/A 31.1 ppb (29) N/A 44.0 ppb (41) N/A -1.0 ppb (0) 2.0 ppb (2) N/A N/A 12.2 μg/m3 (50) 50.0
 
March 16, 2019, 3 a.m. N/A 27.6 ppb (26) N/A 45.0 ppb (42) N/A -1.0 ppb (0) 4.0 ppb (3) N/A N/A 11.5 μg/m3 (48) 48.0
 
March 16, 2019, 2 a.m. N/A 3.2 ppb (3) N/A 18.0 ppb (17) N/A -2.0 ppb (0) 29.0 ppb (22) N/A N/A 6.2 μg/m3 (26) 26.0
 
March 16, 2019, 1 a.m. N/A 3.1 ppb (3) N/A 7.0 ppb (6) N/A -2.0 ppb (0) 43.0 ppb (33) N/A N/A 4.5 μg/m3 (19) 33.0
 
March 16, 2019, midnight N/A 2.9 ppb (3) N/A 9.0 ppb (8) N/A 2.0 ppb (3) 41.0 ppb (32) N/A N/A 5.1 μg/m3 (21) 32.0
 
March 15, 2019, 11 p.m. N/A 4.4 ppb (4) N/A 12.0 ppb (11) N/A 4.0 ppb (6) 39.0 ppb (30) N/A N/A 5.8 μg/m3 (24) 30.0
 
March 15, 2019, 10 p.m. N/A 5.0 ppb (5) N/A 11.0 ppb (10) N/A -2.0 ppb (0) 38.0 ppb (29) N/A N/A 4.6 μg/m3 (19) 29.0
 
March 15, 2019, 9 p.m. N/A 3.9 ppb (4) N/A 8.0 ppb (7) N/A -2.0 ppb (0) 42.0 ppb (32) N/A N/A 4.4 μg/m3 (18) 32.0
 
March 15, 2019, 8 p.m. N/A 7.6 ppb (7) N/A 11.0 ppb (10) N/A -2.0 ppb (0) 39.0 ppb (30) N/A N/A 4.8 μg/m3 (20) 30.0
 
March 15, 2019, 7 p.m. N/A 6.5 ppb (6) N/A 10.0 ppb (9) N/A -2.0 ppb (0) 38.0 ppb (29) N/A N/A 5.6 μg/m3 (23) 29.0
 
March 15, 2019, 6 p.m. N/A 28.0 ppb (26) N/A 25.0 ppb (23) N/A 0.0 ppb (0) 23.0 ppb (18) N/A N/A 10.9 μg/m3 (45) 45.0
 
March 15, 2019, 5 p.m. N/A 50.3 ppb (47) N/A 32.0 ppb (30) N/A 0.0 ppb (0) 9.0 ppb (7) N/A N/A 15.5 μg/m3 (57) 57.0
 
March 15, 2019, 4 p.m. N/A 37.4 ppb (35) N/A 28.0 ppb (26) N/A 0.0 ppb (0) 8.0 ppb (6) N/A N/A 14.7 μg/m3 (56) 56.0
 
March 15, 2019, 3 p.m. N/A 40.1 ppb (37) N/A 31.0 ppb (29) N/A -1.0 ppb (0) 5.0 ppb (4) N/A N/A 15.8 μg/m3 (58) 58.0
 
March 15, 2019, 2 p.m. N/A 19.1 ppb (18) N/A 32.0 ppb (30) N/A -1.0 ppb (0) 3.0 ppb (2) N/A N/A 12.9 μg/m3 (52) 52.0
 
March 15, 2019, 1 p.m. N/A 18.1 ppb (17) N/A 34.0 ppb (31) N/A -1.0 ppb (0) 4.0 ppb (3) N/A N/A 11.0 μg/m3 (46) 46.0
 
March 15, 2019, noon N/A 15.4 ppb (14) N/A 35.0 ppb (32) N/A -1.0 ppb (0) 5.0 ppb (4) N/A N/A 10.4 μg/m3 (43) 43.0
 
March 15, 2019, 11 a.m. N/A 12.7 ppb (12) N/A 33.0 ppb (31) N/A -1.0 ppb (0) 10.0 ppb (8) N/A N/A 9.9 μg/m3 (41) 41.0