ID: 2009

AQSQID: 340410007

Site Name: Columbia

Added: April 21, 2020, 6:24 p.m.

Updated: July 30, 2021, 7:59 p.m.

Location: Knowlton (Delaware Rd), NJ

Reporting: True, Located: True

Current AQI: 53.0

Knowlton (Delaware Rd) NJ, US: 40.924606, -75.067825

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 30, 2021, 6 p.m. 8.0 ppb (8) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 13.0 μg/m3 (53) 53.0
 
July 30, 2021, 5 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 15.0 μg/m3 (58) 58.0
 
July 30, 2021, 4 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 15.9 μg/m3 (59) 59.0
 
July 30, 2021, 3 p.m. 7.0 ppb (7) 2.0 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 15.3 μg/m3 (58) 58.0
 
July 30, 2021, 2 p.m. 8.0 ppb (8) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 11.7 μg/m3 (49) 49.0
 
July 30, 2021, 1 p.m. 9.0 ppb (9) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 34.0 ppb (32) N/A N/A N/A 32.0
 
July 30, 2021, noon 19.0 ppb (18) 7.0 ppb (7) N/A 11.0 ppb (11) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 9.9 μg/m3 (42) 42.0
 
July 30, 2021, 11 a.m. 47.0 ppb (45) 26.0 ppb (25) N/A 21.0 ppb (20) N/A 0.0 ppb (0) 12.0 ppb (12) N/A N/A 12.9 μg/m3 (53) 53.0
 
July 30, 2021, 10 a.m. 45.0 ppb (43) 28.0 ppb (27) N/A 17.0 ppb (17) N/A 0.0 ppb (0) N/A N/A N/A 14.9 μg/m3 (57) 57.0
 
July 30, 2021, 9 a.m. 52.0 ppb (50) 31.0 ppb (30) N/A 21.0 ppb (20) N/A 0.0 ppb (0) 4.0 ppb (4) N/A N/A 15.7 μg/m3 (59) 59.0
 
July 30, 2021, 8 a.m. 71.0 ppb (70) 41.0 ppb (39) N/A 29.0 ppb (28) N/A 0.0 ppb (0) 4.0 ppb (4) N/A N/A 14.7 μg/m3 (57) 70.0
 
July 30, 2021, 7 a.m. 44.0 ppb (42) 27.0 ppb (26) N/A 17.0 ppb (17) N/A 0.0 ppb (0) 3.0 ppb (3) N/A N/A 11.0 μg/m3 (46) 46.0
 
July 30, 2021, 6 a.m. 37.0 ppb (35) 15.0 ppb (15) N/A 22.0 ppb (21) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 2.0 μg/m3 (9) 35.0
 
July 30, 2021, 5 a.m. 51.0 ppb (49) 27.0 ppb (26) N/A 24.0 ppb (23) N/A N/A 9.0 ppb (9) N/A N/A N/A 49.0
 
July 30, 2021, 4 a.m. 41.0 ppb (39) 35.0 ppb (34) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 5.0 ppb (5) N/A N/A -0.6 μg/m3 (0) 39.0
 
July 29, 2021, 11 p.m. 14.0 ppb (14) 3.0 ppb (3) N/A 11.0 ppb (11) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 8.7 μg/m3 (37) 37.0
 
July 29, 2021, 10 p.m. 8.0 ppb (8) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 16.1 μg/m3 (60) 60.0
 
July 29, 2021, 9 p.m. 15.0 ppb (15) 5.0 ppb (5) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A N/A 34.0
 
July 29, 2021, 8 p.m. 27.0 ppb (26) 9.0 ppb (9) N/A 17.0 ppb (17) N/A 0.0 ppb (0) 18.0 ppb (17) N/A N/A 12.6 μg/m3 (53) 53.0
 
July 29, 2021, 7 p.m. 18.0 ppb (17) 5.0 ppb (5) N/A 13.0 ppb (13) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 13.5 μg/m3 (54) 54.0
 
July 29, 2021, 6 p.m. 5.0 ppb (5) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 11.6 μg/m3 (49) 49.0
 
July 29, 2021, 5 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 (40) N/A N/A 11.9 μg/m3 (50) 50.0
 
July 29, 2021, 4 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 7.2 μg/m3 (31) 41.0
 
July 29, 2021, 3 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 6.2 μg/m3 (26) 31.0
 
July 29, 2021, 2 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 3.6 μg/m3 (16) 24.0
 
July 29, 2021, 1 p.m. 14.0 ppb (14) 6.0 ppb (6) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 14.0 ppb (13) N/A N/A N/A 14.0
 
July 29, 2021, noon 16.0 ppb (16) 11.0 ppb (11) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 6.7 μg/m3 (28) 28.0
 
July 29, 2021, 11 a.m. 31.0 ppb (30) 25.0 ppb (24) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 7.9 μg/m3 (33) 33.0
 
July 29, 2021, 10 a.m. 53.0 ppb (50) 45.0 ppb (43) N/A 8.0 ppb (8) N/A 0.0 ppb (0) N/A N/A N/A 6.2 μg/m3 (26) 50.0
 
July 29, 2021, 9 a.m. 39.0 ppb (37) 27.0 ppb (26) N/A 11.0 ppb (11) N/A 0.0 ppb (0) N/A N/A N/A 5.8 μg/m3 (25) 37.0
 
July 29, 2021, 8 a.m. 61.0 ppb (59) 52.0 ppb (50) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 4.8 μg/m3 (20) 59.0
 
July 29, 2021, 7 a.m. 30.0 ppb (29) 23.0 ppb (22) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 4.5 μg/m3 (19) 29.0
 
July 29, 2021, 6 a.m. 59.0 ppb (57) 50.0 ppb (48) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 6.8 μg/m3 (29) 57.0
 
July 29, 2021, 5 a.m. 70.0 ppb (69) 58.0 ppb (56) N/A 11.0 ppb (11) N/A N/A 0.0 ppb (0) N/A N/A N/A 69.0
 
July 29, 2021, 4 a.m. 62.0 ppb (60) 49.0 ppb (47) N/A 13.0 ppb (13) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 7.7 μg/m3 (33) 60.0
 
July 29, 2021, 3 a.m. 42.0 ppb (40) 29.0 ppb (28) N/A 12.0 ppb (12) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 9.3 μg/m3 (39) 40.0
 
July 29, 2021, 2 a.m. 36.0 ppb (34) 22.0 ppb (21) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 11.5 μg/m3 (48) 48.0
 
July 29, 2021, 1 a.m. 27.0 ppb (26) 9.0 ppb (9) N/A 17.0 ppb (17) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 10.4 μg/m3 (44) 44.0
 
July 29, 2021, midnight 14.0 ppb (14) 1.0 ppb (1) N/A 12.0 ppb (12) N/A 0.0 ppb (0) 5.0 ppb (5) N/A N/A 10.7 μg/m3 (45) 45.0
 
July 28, 2021, 11 p.m. 7.0 ppb (7) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 15.0 ppb (14) N/A N/A 12.2 μg/m3 (52) 52.0
 
July 28, 2021, 10 p.m. 10.0 ppb (10) 2.0 ppb (2) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 12.0 μg/m3 (50) 50.0
 
July 28, 2021, 9 p.m. 12.0 ppb (12) 5.0 ppb (5) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A N/A 27.0
 
July 28, 2021, 8 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 17.3 μg/m3 (62) 62.0
 
July 28, 2021, 7 p.m. 9.0 ppb (9) 3.0 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 17.6 μg/m3 (63) 63.0
 
July 28, 2021, 6 p.m. 12.0 ppb (12) 5.0 ppb (5) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 17.4 μg/m3 (63) 63.0
 
July 28, 2021, 5 p.m. 13.0 ppb (13) 6.0 ppb (6) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 20.2 μg/m3 (69) 69.0
 
July 28, 2021, 4 p.m. 12.0 ppb (12) 6.0 ppb (6) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 19.6 μg/m3 (67) 67.0
 
July 28, 2021, 3 p.m. 14.0 ppb (14) 7.0 ppb (7) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 15.3 μg/m3 (58) 58.0
 
July 28, 2021, 2 p.m. 14.0 ppb (14) 6.0 ppb (6) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 12.0 μg/m3 (50) 50.0
 
July 28, 2021, 1 p.m. 23.0 ppb (22) 11.0 ppb (11) N/A 12.0 ppb (12) N/A 0.0 ppb (0) 17.0 ppb (16) N/A N/A N/A 22.0
 
July 28, 2021, noon 24.0 ppb (23) 10.0 ppb (10) N/A 13.0 ppb (13) N/A 0.0 ppb (0) 16.0 ppb (15) N/A N/A 10.2 μg/m3 (43) 43.0
 
July 28, 2021, 11 a.m. 42.0 ppb (40) 21.0 ppb (20) N/A 21.0 ppb (20) N/A 0.0 ppb (0) 5.0 ppb (5) N/A N/A 12.8 μg/m3 (53) 53.0
 
July 28, 2021, 10 a.m. 47.0 ppb (45) 26.0 ppb (25) N/A 20.0 ppb (19) N/A 0.0 ppb (0) N/A N/A N/A 13.6 μg/m3 (55) 55.0
 
July 28, 2021, 9 a.m. 55.0 ppb (53) 33.0 ppb (32) N/A 21.0 ppb (20) N/A 0.0 ppb (0) 3.0 ppb (3) N/A N/A 14.2 μg/m3 (56) 56.0
 
July 28, 2021, 8 a.m. 69.0 ppb (67) 45.0 ppb (43) N/A 23.0 ppb (22) N/A N/A 2.0 ppb (2) N/A N/A 14.4 μg/m3 (56) 67.0
 
July 28, 2021, 7 a.m. 40.0 ppb (38) 21.0 ppb (20) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 4.0 ppb (4) N/A N/A 11.1 μg/m3 (47) 47.0
 
July 28, 2021, 6 a.m. 34.0 ppb (33) 18.0 ppb (17) N/A 15.0 ppb (15) N/A 0.0 ppb (0) 16.0 ppb (15) N/A N/A 10.2 μg/m3 (43) 43.0
 
July 28, 2021, 5 a.m. 22.0 ppb (21) 5.0 ppb (5) N/A 17.0 ppb (17) N/A N/A 24.0 ppb (23) N/A N/A N/A 23.0
 
July 28, 2021, 4 a.m. 18.0 ppb (17) 3.0 ppb (3) N/A 15.0 ppb (15) N/A 0.0 ppb (0) 22.0 ppb (21) N/A N/A 9.9 μg/m3 (42) 42.0
 
July 28, 2021, 3 a.m. 21.0 ppb (20) 6.0 ppb (6) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 16.0 ppb (15) N/A N/A 6.4 μg/m3 (27) 27.0
 
July 28, 2021, 2 a.m. 28.0 ppb (27) 11.0 ppb (11) N/A 17.0 ppb (17) N/A 0.0 ppb (0) 11.0 ppb (11) N/A N/A 5.8 μg/m3 (25) 27.0
 
July 28, 2021, 1 a.m. 33.0 ppb (32) 10.0 ppb (10) N/A 22.0 ppb (21) N/A 0.0 ppb (0) 18.0 ppb (17) N/A N/A 9.7 μg/m3 (41) 41.0
 
July 28, 2021, midnight 16.0 ppb (16) 3.0 ppb (3) N/A 13.0 ppb (13) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 12.6 μg/m3 (53) 53.0
 
July 27, 2021, 11 p.m. 22.0 ppb (21) 4.0 ppb (4) N/A 17.0 ppb (17) N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 14.1 μg/m3 (56) 56.0
 
July 27, 2021, 10 p.m. 12.0 ppb (12) 3.0 ppb (3) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 12.9 μg/m3 (53) 53.0
 
July 27, 2021, 9 p.m. 5.0 ppb (5) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 49.0 ppb (46) N/A N/A N/A 46.0
 
July 27, 2021, 8 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 53.0 ppb (50) N/A N/A 14.8 μg/m3 (57) 57.0
 
July 27, 2021, 7 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 52.0 ppb (49) N/A N/A 19.3 μg/m3 (67) 67.0
 
July 27, 2021, 6 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 52.0 ppb (49) N/A N/A 24.8 μg/m3 (78) 78.0
 
July 27, 2021, 5 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 51.0 ppb (48) N/A N/A 27.6 μg/m3 (84) 84.0
 
July 27, 2021, 4 p.m. 7.0 ppb (7) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 49.0 ppb (46) N/A N/A 28.9 μg/m3 (87) 87.0
 
July 27, 2021, 3 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 (44) N/A N/A 29.5 μg/m3 (88) 88.0
 
July 27, 2021, 2 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 23.2 μg/m3 (75) 75.0
 
July 27, 2021, 1 p.m. 10.0 ppb (10) 3.0 ppb (3) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 21.0 ppb (20) N/A N/A N/A 20.0
 
July 27, 2021, noon 17.0 ppb (17) 10.0 ppb (10) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 8.0 ppb (8) N/A N/A 19.8 μg/m3 (68) 68.0
 
July 27, 2021, 11 a.m. 40.0 ppb (38) 34.0 ppb (33) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 24.5 μg/m3 (78) 78.0
 
July 27, 2021, 10 a.m. 24.0 ppb (23) 19.0 ppb (18) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A N/A N/A 27.2 μg/m3 (83) 83.0
 
July 27, 2021, 9 a.m. 76.0 ppb (75) 66.0 ppb (64) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 28.2 μg/m3 (85) 85.0
 
July 27, 2021, 8 a.m. 22.0 ppb (21) 14.0 ppb (14) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 28.5 μg/m3 (86) 86.0
 
July 27, 2021, 7 a.m. 26.0 ppb (25) 18.0 ppb (17) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 31.9 μg/m3 (93) 93.0
 
July 27, 2021, 6 a.m. 38.0 ppb (36) 28.0 ppb (27) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 33.2 μg/m3 (96) 96.0
 
July 27, 2021, 5 a.m. 30.0 ppb (29) 19.0 ppb (18) N/A 11.0 ppb (11) N/A N/A 0.0 ppb (0) N/A N/A N/A 29.0
 
July 27, 2021, 4 a.m. 64.0 ppb (62) 48.0 ppb (46) N/A 15.0 ppb (15) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 30.5 μg/m3 (90) 90.0
 
July 27, 2021, 3 a.m. 37.0 ppb (35) 21.0 ppb (20) N/A 16.0 ppb (16) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 33.4 μg/m3 (96) 96.0
 
July 27, 2021, 2 a.m. 31.0 ppb (30) 15.0 ppb (15) N/A 15.0 ppb (15) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 32.7 μg/m3 (95) 95.0
 
July 27, 2021, 1 a.m. 31.0 ppb (30) 14.0 ppb (14) N/A 17.0 ppb (17) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 32.2 μg/m3 (94) 94.0
 
July 27, 2021, midnight 20.0 ppb (19) 5.0 ppb (5) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 4.0 ppb (4) N/A N/A 30.1 μg/m3 (89) 89.0
 
July 26, 2021, 11 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 18.0 ppb (17) N/A N/A 29.4 μg/m3 (88) 88.0
 
July 26, 2021, 10 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 31.9 μg/m3 (93) 93.0
 
July 26, 2021, 9 p.m. 8.0 ppb (8) 1.0 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A N/A 41.0
 
July 26, 2021, 8 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 30.2 μg/m3 (90) 90.0
 
July 26, 2021, 7 p.m. 6.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 52.0 ppb (49) N/A N/A 28.2 μg/m3 (85) 85.0
 
July 26, 2021, 6 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 53.0 ppb (50) N/A N/A 29.0 μg/m3 (87) 87.0
 
July 26, 2021, 5 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 27.3 μg/m3 (83) 83.0
 
July 26, 2021, 4 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 49.0 ppb (46) N/A N/A 25.0 μg/m3 (79) 79.0
 
July 26, 2021, 3 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 20.2 μg/m3 (69) 69.0
 
July 26, 2021, 2 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 14.5 μg/m3 (57) 57.0
 
July 26, 2021, 1 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A N/A 23.0
 
July 26, 2021, noon 12.0 ppb (12) 5.0 ppb (5) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 12.0 ppb (12) N/A N/A 6.7 μg/m3 (28) 28.0
 
July 26, 2021, 11 a.m. 33.0 ppb (32) 20.0 ppb (19) N/A 12.0 ppb (12) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 10.1 μg/m3 (43) 43.0
 
July 26, 2021, 10 a.m. 36.0 ppb (34) 26.0 ppb (25) N/A 10.0 ppb (10) N/A 0.0 ppb (0) N/A N/A N/A 12.7 μg/m3 (53) 53.0
 
July 26, 2021, 9 a.m. 33.0 ppb (32) 21.0 ppb (20) N/A 12.0 ppb (12) N/A 0.0 ppb (0) N/A N/A N/A 15.0 μg/m3 (58) 58.0
 
July 26, 2021, 8 a.m. 47.0 ppb (45) 31.0 ppb (30) N/A 15.0 ppb (15) N/A N/A 4.0 ppb (4) N/A N/A 17.8 μg/m3 (63) 63.0
 
July 26, 2021, 7 a.m. 36.0 ppb (34) 15.0 ppb (15) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 8.0 ppb (8) N/A N/A 21.0 μg/m3 (70) 70.0
 
July 26, 2021, 6 a.m. 20.0 ppb (19) 7.0 ppb (7) N/A 13.0 ppb (13) N/A 0.0 ppb (0) 17.0 ppb (16) N/A N/A 21.5 μg/m3 (71) 71.0
 
July 26, 2021, 5 a.m. 16.0 ppb (16) 8.0 ppb (8) N/A 7.0 ppb (7) N/A N/A 4.0 ppb (4) N/A N/A N/A 16.0
 
July 26, 2021, 4 a.m. 6.0 ppb (6) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 9.0 ppb (9) N/A N/A 19.8 μg/m3 (68) 68.0
 
July 26, 2021, 3 a.m. 9.0 ppb (9) 1.0 ppb (1) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 7.0 ppb (7) N/A N/A 20.1 μg/m3 (68) 68.0
 
July 26, 2021, 2 a.m. 15.0 ppb (15) 4.0 ppb (4) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 6.0 ppb (6) N/A N/A 20.9 μg/m3 (70) 70.0
 
July 26, 2021, 1 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 12.0 ppb (12) N/A N/A 20.7 μg/m3 (70) 70.0
 
July 26, 2021, midnight 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 17.0 ppb (16) N/A N/A 20.1 μg/m3 (68) 68.0
 
July 25, 2021, 11 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 20.4 μg/m3 (69) 69.0
 
July 25, 2021, 10 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 20.9 μg/m3 (70) 70.0
 
July 25, 2021, 9 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 51.0 ppb (48) N/A N/A N/A 48.0
 
July 25, 2021, 8 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 53.0 ppb (50) N/A N/A 20.4 μg/m3 (69) 69.0
 
July 25, 2021, 7 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (2) 52.0 ppb (49) N/A N/A 21.2 μg/m3 (71) 71.0
 
July 25, 2021, 6 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A 18.7 μg/m3 (65) 65.0
 
July 25, 2021, 5 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 15.8 μg/m3 (59) 59.0
 
July 25, 2021, 4 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 11.7 μg/m3 (49) 49.0
 
July 25, 2021, 3 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 6.4 μg/m3 (27) 33.0
 
July 25, 2021, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 6.2 μg/m3 (26) 30.0
 
July 25, 2021, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A N/A 30.0
 
July 25, 2021, noon N/A N/A N/A N/A N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 10.9 μg/m3 (46) 46.0
 
July 25, 2021, 11 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 10.1 μg/m3 (43) 43.0
 
July 25, 2021, 10 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A N/A 11.0 μg/m3 (46) 46.0
 
July 25, 2021, 9 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 10.1 μg/m3 (43) 43.0
 
July 25, 2021, 8 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 8.8 μg/m3 (37) 37.0
 
July 25, 2021, 7 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 8.3 μg/m3 (35) 35.0
 
July 25, 2021, 6 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 11.3 μg/m3 (48) 48.0
 
July 25, 2021, 5 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A N/A 42.0 ppb (39) N/A N/A N/A 39.0
 
July 25, 2021, 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 (38) N/A N/A 16.6 μg/m3 (61) 61.0
 
July 25, 2021, 3 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 14.8 μg/m3 (57) 57.0
 
July 25, 2021, 2 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 (38) N/A N/A 14.6 μg/m3 (57) 57.0
 
July 25, 2021, 1 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 11.9 μg/m3 (50) 50.0
 
July 25, 2021, midnight 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 8.6 μg/m3 (36) 36.0
 
July 24, 2021, 11 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 8.9 μg/m3 (38) 38.0
 
July 24, 2021, 10 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 9.6 μg/m3 (40) 40.0
 
July 24, 2021, 9 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A N/A 40.0
 
July 24, 2021, 8 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 47.0 ppb (44) N/A N/A 11.2 μg/m3 (47) 47.0
 
July 24, 2021, 7 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 11.5 μg/m3 (48) 48.0
 
July 24, 2021, 6 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 10.5 μg/m3 (44) 44.0
 
July 24, 2021, 5 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 13.2 μg/m3 (54) 54.0
 
July 24, 2021, 4 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 14.2 μg/m3 (56) 56.0
 
July 24, 2021, 3 p.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 8.1 μg/m3 (34) 34.0
 
July 24, 2021, 2 p.m. 7.0 ppb (7) 3.0 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 21.0 ppb (20) N/A N/A 0.9 μg/m3 (4) 20.0
 
July 24, 2021, 1 p.m. 6.0 ppb (6) 2.0 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 12.0 ppb (12) N/A N/A N/A 12.0
 
July 24, 2021, noon 10.0 ppb (10) 6.0 ppb (6) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 6.0 ppb (6) N/A N/A 6.0 μg/m3 (25) 25.0
 
July 24, 2021, 11 a.m. 21.0 ppb (20) 16.0 ppb (16) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 9.0 μg/m3 (38) 38.0
 
July 24, 2021, 10 a.m. 27.0 ppb (26) 23.0 ppb (22) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A N/A 8.7 μg/m3 (37) 37.0
 
July 24, 2021, 9 a.m. 42.0 ppb (40) 38.0 ppb (36) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 10.9 μg/m3 (46) 46.0
 
July 24, 2021, 8 a.m. 57.0 ppb (55) 51.0 ppb (49) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 9.6 μg/m3 (40) 55.0
 
July 24, 2021, 7 a.m. 36.0 ppb (34) 30.0 ppb (29) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 9.4 μg/m3 (40) 40.0
 
July 24, 2021, 6 a.m. 31.0 ppb (30) 25.0 ppb (24) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 11.5 μg/m3 (48) 48.0
 
July 24, 2021, 5 a.m. 39.0 ppb (37) 30.0 ppb (29) N/A 8.0 ppb (8) N/A N/A 0.0 ppb (0) N/A N/A N/A 37.0
 
July 24, 2021, 4 a.m. 19.0 ppb (18) 11.0 ppb (11) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 11.7 μg/m3 (49) 49.0
 
July 24, 2021, 3 a.m. 24.0 ppb (23) 14.0 ppb (14) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 11.4 μg/m3 (48) 48.0
 
July 24, 2021, 2 a.m. 22.0 ppb (21) 10.0 ppb (10) N/A 12.0 ppb (12) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 9.4 μg/m3 (40) 40.0
 
July 24, 2021, 1 a.m. 14.0 ppb (14) 2.0 ppb (2) N/A 11.0 ppb (11) N/A 0.0 ppb (0) 3.0 ppb (3) N/A N/A 10.3 μg/m3 (43) 43.0
 
July 24, 2021, midnight 7.0 ppb (7) 0.0 ppb (0) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 8.0 ppb (8) N/A N/A 9.0 μg/m3 (38) 38.0
 
July 23, 2021, 11 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 20.0 ppb (19) N/A N/A 11.2 μg/m3 (47) 47.0
 
July 23, 2021, 10 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 8.7 μg/m3 (37) 37.0
 
July 23, 2021, 9 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A N/A 29.0
 
July 23, 2021, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 6.6 μg/m3 (28) 28.0
 
July 23, 2021, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A 7.8 μg/m3 (33) 33.0
 
July 23, 2021, 6 p.m. 5.0 ppb (5) 3.0 ppb (3) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 9.6 μg/m3 (40) 40.0
 
July 23, 2021, 5 p.m. 14.0 ppb (14) 8.0 ppb (8) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 9.5 μg/m3 (40) 40.0
 
July 23, 2021, 4 p.m. 12.0 ppb (12) 7.0 ppb (7) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 9.6 μg/m3 (40) 40.0
 
July 23, 2021, 3 p.m. 9.0 ppb (9) 5.0 ppb (5) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 8.2 μg/m3 (35) 35.0