ID: 2009

AQSQID: 340410007

Site Name: Columbia

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

Updated: March 4, 2021, 7:32 p.m.

Location: Knowlton (Delaware Rd), NJ

Reporting: True, Located: True

Current AQI: 36.0

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
Feb. 25, 2021, 5 p.m. 24.0 ppb (23) 17.0 ppb (17) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A -4.2 μg/m3 (0) 38.0
 
Feb. 25, 2021, 4 p.m. 18.0 ppb (17) 12.0 ppb (12) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A -1.1 μg/m3 (0) 38.0
 
Feb. 25, 2021, 3 p.m. 12.0 ppb (12) 8.0 ppb (8) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 2.5 μg/m3 (11) 38.0
 
Feb. 25, 2021, 2 p.m. 16.0 ppb (16) 10.0 ppb (10) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 4.4 μg/m3 (19) 35.0
 
Feb. 25, 2021, 1 p.m. 27.0 ppb (26) 17.0 ppb (17) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A N/A 30.0
 
Feb. 25, 2021, noon 22.0 ppb (21) 12.0 ppb (12) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 7.3 μg/m3 (31) 31.0
 
Feb. 25, 2021, 11 a.m. 21.0 ppb (20) 11.0 ppb (11) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 10.0 μg/m3 (42) 42.0
 
Feb. 25, 2021, 10 a.m. 29.0 ppb (28) 17.0 ppb (17) N/A 12.0 ppb (12) N/A 0.0 ppb (0) N/A N/A N/A 10.8 μg/m3 (46) 46.0
 
Feb. 25, 2021, 9 a.m. 14.0 ppb (14) 8.0 ppb (8) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 9.1 μg/m3 (38) 38.0
 
Feb. 25, 2021, 8 a.m. 18.0 ppb (17) 10.0 ppb (10) N/A 7.0 ppb (7) N/A N/A 39.0 ppb (37) N/A N/A 9.5 μg/m3 (40) 40.0
 
Feb. 25, 2021, 7 a.m. 10.0 ppb (10) 6.0 ppb (6) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 48.0 ppb (45) N/A N/A 10.7 μg/m3 (45) 45.0
 
Feb. 25, 2021, 6 a.m. 13.0 ppb (13) 6.0 ppb (6) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 10.1 μg/m3 (43) 43.0
 
Feb. 25, 2021, 5 a.m. 30.0 ppb (29) 15.0 ppb (15) N/A 15.0 ppb (15) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A N/A 31.0
 
Feb. 25, 2021, 4 a.m. 12.0 ppb (12) 7.0 ppb (7) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 6.2 μg/m3 (26) 40.0
 
Feb. 25, 2021, 3 a.m. 27.0 ppb (26) 12.0 ppb (12) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 7.2 μg/m3 (31) 33.0
 
Feb. 25, 2021, 2 a.m. 60.0 ppb (58) 34.0 ppb (33) N/A 26.0 ppb (25) N/A 0.0 ppb (0) 20.0 ppb (19) N/A N/A 6.1 μg/m3 (26) 58.0
 
Feb. 25, 2021, 1 a.m. 21.0 ppb (20) 9.0 ppb (9) N/A 11.0 ppb (11) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 4.8 μg/m3 (20) 35.0
 
Feb. 25, 2021, midnight 13.0 ppb (13) 8.0 ppb (8) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 3.8 μg/m3 (16) 42.0
 
Feb. 24, 2021, 11 p.m. 14.0 ppb (14) 8.0 ppb (8) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 3.1 μg/m3 (13) 43.0
 
Feb. 24, 2021, 10 p.m. 12.0 ppb (12) 7.0 ppb (7) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 48.0 ppb (45) N/A N/A 0.3 μg/m3 (2) 45.0
 
Feb. 24, 2021, 9 p.m. 12.0 ppb (12) 7.0 ppb (7) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 50.0 ppb (47) N/A N/A N/A 47.0
 
Feb. 24, 2021, 8 p.m. 11.0 ppb (11) 7.0 ppb (7) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 53.0 ppb (50) N/A N/A 1.9 μg/m3 (8) 50.0
 
Feb. 24, 2021, 7 p.m. 11.0 ppb (11) 7.0 ppb (7) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 52.0 ppb (49) N/A N/A 2.1 μg/m3 (9) 49.0
 
Feb. 24, 2021, 6 p.m. 14.0 ppb (14) 9.0 ppb (9) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 48.0 ppb (45) N/A N/A 1.5 μg/m3 (7) 45.0
 
Feb. 24, 2021, 5 p.m. 19.0 ppb (18) 11.0 ppb (11) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 0.7 μg/m3 (3) 40.0
 
Feb. 24, 2021, 4 p.m. 16.0 ppb (16) 10.0 ppb (10) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 4.5 μg/m3 (19) 39.0
 
Feb. 24, 2021, 3 p.m. 14.0 ppb (14) 7.0 ppb (7) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 9.9 μg/m3 (42) 42.0
 
Feb. 24, 2021, 2 p.m. 15.0 ppb (15) 7.0 ppb (7) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 15.4 μg/m3 (58) 58.0
 
Feb. 24, 2021, 1 p.m. 32.0 ppb (31) 16.0 ppb (16) N/A 16.0 ppb (16) N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A N/A 31.0
 
Feb. 24, 2021, noon 69.0 ppb (67) 38.0 ppb (36) N/A 31.0 ppb (30) N/A 0.0 ppb (0) 8.0 ppb (8) N/A N/A 9.4 μg/m3 (40) 67.0
 
Feb. 24, 2021, 10 a.m. 38.0 ppb (36) 21.0 ppb (20) N/A 16.0 ppb (16) N/A 0.0 ppb (0) N/A N/A N/A 8.4 μg/m3 (36) 36.0
 
Feb. 24, 2021, 9 a.m. 33.0 ppb (32) 15.0 ppb (15) N/A 17.0 ppb (17) N/A N/A 24.0 ppb (23) N/A N/A 7.7 μg/m3 (33) 33.0
 
Feb. 24, 2021, 8 a.m. 44.0 ppb (42) 20.0 ppb (19) N/A 23.0 ppb (22) N/A N/A 20.0 ppb (19) N/A N/A 3.7 μg/m3 (16) 42.0
 
Feb. 24, 2021, 6 a.m. 6.0 ppb (6) 3.0 ppb (3) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A -0.8 μg/m3 (0) 38.0
 
Feb. 24, 2021, 5 a.m. 8.0 ppb (8) 4.0 ppb (4) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A N/A 38.0
 
Feb. 24, 2021, 4 a.m. 10.0 ppb (10) 5.0 ppb (5) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 6.5 μg/m3 (28) 37.0
 
Feb. 24, 2021, 3 a.m. 12.0 ppb (12) 6.0 ppb (6) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 6.5 μg/m3 (28) 35.0
 
Feb. 24, 2021, 2 a.m. 13.0 ppb (13) 6.0 ppb (6) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 8.3 μg/m3 (35) 35.0
 
Feb. 24, 2021, 1 a.m. 11.0 ppb (11) 5.0 ppb (5) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 9.6 μg/m3 (40) 40.0
 
Feb. 24, 2021, midnight 11.0 ppb (11) 5.0 ppb (5) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 10.3 μg/m3 (43) 43.0
 
Feb. 23, 2021, 11 p.m. 8.0 ppb (8) 4.0 ppb (4) 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
 
Feb. 23, 2021, 10 p.m. 9.0 ppb (9) 5.0 ppb (5) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 11.4 μg/m3 (48) 48.0
 
Feb. 23, 2021, 9 p.m. 11.0 ppb (11) 5.0 ppb (5) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A N/A 38.0
 
Feb. 23, 2021, 8 p.m. 15.0 ppb (15) 6.0 ppb (6) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 8.3 μg/m3 (35) 37.0
 
Feb. 23, 2021, 7 p.m. 13.0 ppb (13) 6.0 ppb (6) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 8.4 μg/m3 (36) 38.0
 
Feb. 23, 2021, 6 p.m. 13.0 ppb (13) 6.0 ppb (6) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 12.3 μg/m3 (52) 52.0
 
Feb. 23, 2021, 5 p.m. 15.0 ppb (15) 7.0 ppb (7) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 17.3 μg/m3 (62) 62.0
 
Feb. 23, 2021, 4 p.m. 14.0 ppb (14) 6.0 ppb (6) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 19.7 μg/m3 (67) 67.0
 
Feb. 23, 2021, 3 p.m. 19.0 ppb (18) 7.0 ppb (7) N/A 12.0 ppb (12) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 20.1 μg/m3 (68) 68.0
 
Feb. 23, 2021, 2 p.m. 26.0 ppb (25) 10.0 ppb (10) N/A 15.0 ppb (15) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 18.0 μg/m3 (64) 64.0
 
Feb. 23, 2021, 1 p.m. 24.0 ppb (23) 11.0 ppb (11) N/A 13.0 ppb (13) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A N/A 27.0
 
Feb. 23, 2021, noon 27.0 ppb (26) 11.0 ppb (11) N/A 15.0 ppb (15) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 16.3 μg/m3 (60) 60.0
 
Feb. 23, 2021, 11 a.m. 35.0 ppb (34) 16.0 ppb (16) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 22.0 ppb (21) N/A N/A 19.1 μg/m3 (66) 66.0
 
Feb. 23, 2021, 10 a.m. 42.0 ppb (40) 22.0 ppb (21) N/A 20.0 ppb (19) N/A 0.0 ppb (0) N/A N/A N/A 20.2 μg/m3 (69) 69.0
 
Feb. 23, 2021, 9 a.m. 23.0 ppb (22) 10.0 ppb (10) N/A 12.0 ppb (12) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 15.6 μg/m3 (59) 59.0
 
Feb. 23, 2021, 8 a.m. 14.0 ppb (14) 5.0 ppb (5) N/A 8.0 ppb (8) N/A N/A 32.0 ppb (30) N/A N/A 14.9 μg/m3 (57) 57.0
 
Feb. 23, 2021, 7 a.m. 14.0 ppb (14) 5.0 ppb (5) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 17.8 μg/m3 (63) 63.0
 
Feb. 23, 2021, 6 a.m. 10.0 ppb (10) 4.0 ppb (4) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 18.6 μg/m3 (65) 65.0
 
Feb. 23, 2021, 5 a.m. 14.0 ppb (14) 5.0 ppb (5) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A N/A 29.0
 
Feb. 23, 2021, 4 a.m. 40.0 ppb (38) 19.0 ppb (18) N/A 21.0 ppb (20) N/A 0.0 ppb (0) 13.0 ppb (13) N/A N/A 14.1 μg/m3 (56) 56.0
 
Feb. 23, 2021, 3 a.m. 17.0 ppb (17) 6.0 ppb (6) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 11.8 μg/m3 (50) 50.0
 
Feb. 23, 2021, 2 a.m. 11.0 ppb (11) 4.0 ppb (4) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 10.4 μg/m3 (44) 44.0
 
Feb. 23, 2021, 1 a.m. 11.0 ppb (11) 4.0 ppb (4) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 8.9 μg/m3 (38) 38.0
 
Feb. 23, 2021, midnight 12.0 ppb (12) 4.0 ppb (4) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 6.8 μg/m3 (29) 33.0
 
Feb. 22, 2021, 11 p.m. 17.0 ppb (17) 5.0 ppb (5) N/A 11.0 ppb (11) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 6.0 μg/m3 (25) 28.0
 
Feb. 22, 2021, 10 p.m. 29.0 ppb (28) 11.0 ppb (11) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 25.0 ppb (24) N/A N/A 5.0 μg/m3 (21) 28.0
 
Feb. 22, 2021, 9 p.m. 34.0 ppb (33) 12.0 ppb (12) N/A 22.0 ppb (21) N/A 0.0 ppb (0) 23.0 ppb (22) N/A N/A N/A 33.0
 
Feb. 22, 2021, 8 p.m. 39.0 ppb (37) 19.0 ppb (18) N/A 20.0 ppb (19) N/A 0.0 ppb (0) N/A N/A N/A 1.5 μg/m3 (7) 37.0
 
Feb. 22, 2021, 7 p.m. 35.0 ppb (34) 19.0 ppb (18) N/A 16.0 ppb (16) N/A 0.0 ppb (0) N/A N/A N/A 2.5 μg/m3 (11) 34.0
 
Feb. 22, 2021, 6 p.m. 12.0 ppb (12) 5.0 ppb (5) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 5.2 μg/m3 (22) 37.0
 
Feb. 22, 2021, 5 p.m. 12.0 ppb (12) 5.0 ppb (5) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 7.6 μg/m3 (32) 37.0
 
Feb. 22, 2021, 4 p.m. 12.0 ppb (12) 5.0 ppb (5) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 8.4 μg/m3 (36) 37.0
 
Feb. 22, 2021, 3 p.m. 11.0 ppb (11) 5.0 ppb (5) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 9.7 μg/m3 (41) 41.0
 
Feb. 22, 2021, 2 p.m. 12.0 ppb (12) 5.0 ppb (5) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 39.0 ppb (37) N/A N/A 15.0 μg/m3 (58) 58.0
 
Feb. 22, 2021, 1 p.m. 47.0 ppb (45) 27.0 ppb (26) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 23.0 ppb (22) N/A N/A N/A 45.0
 
Feb. 22, 2021, noon 89.0 ppb (89) 51.0 ppb (49) N/A 37.0 ppb (35) N/A 0.0 ppb (0) 2.0 ppb (2) N/A N/A 24.1 μg/m3 (77) 89.0
 
Feb. 22, 2021, 11 a.m. 82.0 ppb (81) 45.0 ppb (43) N/A 36.0 ppb (34) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 25.8 μg/m3 (80) 81.0
 
Feb. 22, 2021, 10 a.m. 125.0 ppb (106) 91.0 ppb (91) N/A 34.0 ppb (33) N/A 1.0 ppb (2) N/A N/A N/A 25.5 μg/m3 (80) 106.0
 
Feb. 22, 2021, 9 a.m. 69.0 ppb (67) 37.0 ppb (35) N/A 31.0 ppb (30) N/A N/A 1.0 ppb (1) N/A N/A 23.7 μg/m3 (76) 76.0
 
Feb. 22, 2021, 8 a.m. 57.0 ppb (55) 28.0 ppb (27) N/A 28.0 ppb (27) N/A N/A 5.0 ppb (5) N/A N/A 20.6 μg/m3 (69) 69.0
 
Feb. 22, 2021, 7 a.m. 58.0 ppb (56) 27.0 ppb (26) N/A 30.0 ppb (29) N/A 0.0 ppb (0) 4.0 ppb (4) N/A N/A 19.7 μg/m3 (67) 67.0
 
Feb. 22, 2021, 6 a.m. 64.0 ppb (62) 27.0 ppb (26) N/A 36.0 ppb (34) N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 18.2 μg/m3 (64) 64.0
 
Feb. 22, 2021, 5 a.m. 113.0 ppb (104) 71.0 ppb (70) N/A 41.0 ppb (39) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A N/A 104.0
 
Feb. 22, 2021, 4 a.m. 135.0 ppb (108) 93.0 ppb (93) N/A 42.0 ppb (40) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 15.6 μg/m3 (59) 108.0
 
Feb. 22, 2021, 3 a.m. 64.0 ppb (62) 24.0 ppb (23) N/A 39.0 ppb (37) N/A 0.0 ppb (0) 3.0 ppb (3) N/A N/A 15.5 μg/m3 (59) 62.0
 
Feb. 22, 2021, 2 a.m. 52.0 ppb (50) 13.0 ppb (13) N/A 39.0 ppb (37) N/A 0.0 ppb (0) 3.0 ppb (3) N/A N/A 14.4 μg/m3 (56) 56.0
 
Feb. 22, 2021, 1 a.m. 31.0 ppb (30) 6.0 ppb (6) N/A 24.0 ppb (23) N/A 0.0 ppb (0) 16.0 ppb (15) N/A N/A 13.4 μg/m3 (54) 54.0
 
Feb. 22, 2021, midnight 15.0 ppb (15) 4.0 ppb (4) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 12.6 μg/m3 (53) 53.0
 
Feb. 21, 2021, 11 p.m. 14.0 ppb (14) 6.0 ppb (6) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 36.0 ppb (34) N/A N/A 10.0 μg/m3 (42) 42.0
 
Feb. 21, 2021, 10 p.m. 14.0 ppb (14) 6.0 ppb (6) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 3.7 μg/m3 (16) 38.0
 
Feb. 21, 2021, 9 p.m. 10.0 ppb (10) 7.0 ppb (7) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A N/A 42.0
 
Feb. 21, 2021, 8 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A -0.5 μg/m3 (0) 41.0
 
Feb. 21, 2021, 7 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 0.2 μg/m3 (1) 42.0
 
Feb. 21, 2021, 6 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 45.0 ppb (42) N/A N/A 2.9 μg/m3 (13) 42.0
 
Feb. 21, 2021, 5 p.m. 12.0 ppb (12) 8.0 ppb (8) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 4.3 μg/m3 (18) 40.0
 
Feb. 21, 2021, 4 p.m. 8.0 ppb (8) 6.0 ppb (6) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 6.5 μg/m3 (28) 40.0
 
Feb. 21, 2021, 3 p.m. 8.0 ppb (8) 5.0 ppb (5) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 8.0 μg/m3 (34) 39.0
 
Feb. 21, 2021, 2 p.m. 14.0 ppb (14) 9.0 ppb (9) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 11.8 μg/m3 (50) 50.0
 
Feb. 21, 2021, 1 p.m. 9.0 ppb (9) 6.0 ppb (6) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A N/A 38.0
 
Feb. 21, 2021, noon 19.0 ppb (18) 9.0 ppb (9) N/A 9.0 ppb (9) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 14.9 μg/m3 (57) 57.0
 
Feb. 21, 2021, 11 a.m. 11.0 ppb (11) 6.0 ppb (6) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 16.3 μg/m3 (60) 60.0
 
Feb. 21, 2021, 10 a.m. 8.0 ppb (8) 5.0 ppb (5) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A N/A 17.6 μg/m3 (63) 63.0
 
Feb. 21, 2021, 9 a.m. 10.0 ppb (10) 5.0 ppb (5) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 16.3 μg/m3 (60) 60.0
 
Feb. 21, 2021, 8 a.m. 9.0 ppb (9) 5.0 ppb (5) N/A 4.0 ppb (4) N/A N/A 39.0 ppb (37) N/A N/A 15.5 μg/m3 (59) 59.0
 
Feb. 21, 2021, 7 a.m. 8.0 ppb (8) 5.0 ppb (5) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 14.9 μg/m3 (57) 57.0
 
Feb. 21, 2021, 6 a.m. 10.0 ppb (10) 5.0 ppb (5) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 13.7 μg/m3 (55) 55.0
 
Feb. 21, 2021, 5 a.m. 9.0 ppb (9) 5.0 ppb (5) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A N/A 41.0
 
Feb. 21, 2021, 4 a.m. 10.0 ppb (10) 6.0 ppb (6) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 43.0 ppb (40) N/A N/A 14.2 μg/m3 (56) 56.0
 
Feb. 21, 2021, 3 a.m. 9.0 ppb (9) 5.0 ppb (5) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 40.0 ppb (38) N/A N/A 13.4 μg/m3 (54) 54.0
 
Feb. 21, 2021, 2 a.m. 9.0 ppb (9) 5.0 ppb (5) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 14.8 μg/m3 (57) 57.0
 
Feb. 21, 2021, 1 a.m. 13.0 ppb (13) 6.0 ppb (6) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 15.1 μg/m3 (58) 58.0
 
Feb. 21, 2021, midnight 8.0 ppb (8) 4.0 ppb (4) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 46.0 ppb (43) N/A N/A 13.8 μg/m3 (55) 55.0
 
Feb. 20, 2021, 11 p.m. 6.0 ppb (6) 3.0 ppb (3) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (45) N/A N/A 11.4 μg/m3 (48) 48.0
 
Feb. 20, 2021, 10 p.m. 6.0 ppb (6) 3.0 ppb (3) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 48.0 ppb (45) N/A N/A 9.1 μg/m3 (38) 45.0
 
Feb. 20, 2021, 9 p.m. 6.0 ppb (6) 3.0 ppb (3) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (44) N/A N/A N/A 44.0
 
Feb. 20, 2021, 8 p.m. 6.0 ppb (6) 3.0 ppb (3) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 47.0 ppb (44) N/A N/A 8.1 μg/m3 (34) 44.0
 
Feb. 20, 2021, 7 p.m. 8.0 ppb (8) 4.0 ppb (4) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 47.0 ppb (44) N/A N/A 6.8 μg/m3 (29) 44.0
 
Feb. 20, 2021, 6 p.m. 9.0 ppb (9) 5.0 ppb (5) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 6.9 μg/m3 (29) 41.0
 
Feb. 20, 2021, 5 p.m. 10.0 ppb (10) 6.0 ppb (6) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 44.0 ppb (41) N/A N/A 7.7 μg/m3 (33) 41.0
 
Feb. 20, 2021, 4 p.m. 17.0 ppb (17) 11.0 ppb (11) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A 6.8 μg/m3 (29) 38.0
 
Feb. 20, 2021, 3 p.m. 11.0 ppb (11) 7.0 ppb (7) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 7.1 μg/m3 (30) 39.0
 
Feb. 20, 2021, 2 p.m. 9.0 ppb (9) 5.0 ppb (5) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 42.0 ppb (39) N/A N/A 7.2 μg/m3 (31) 39.0
 
Feb. 20, 2021, 1 p.m. 12.0 ppb (12) 6.0 ppb (6) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 41.0 ppb (38) N/A N/A N/A 38.0
 
Feb. 20, 2021, noon 14.0 ppb (14) 6.0 ppb (6) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 37.0 ppb (35) N/A N/A 10.4 μg/m3 (44) 44.0
 
Feb. 20, 2021, 11 a.m. 29.0 ppb (28) 14.0 ppb (14) N/A 15.0 ppb (15) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 11.5 μg/m3 (48) 48.0
 
Feb. 20, 2021, 10 a.m. 25.0 ppb (24) 11.0 ppb (11) N/A 13.0 ppb (13) N/A 0.0 ppb (0) N/A N/A N/A 9.4 μg/m3 (40) 40.0
 
Feb. 20, 2021, 9 a.m. 15.0 ppb (15) 6.0 ppb (6) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 35.0 ppb (33) N/A N/A 8.6 μg/m3 (36) 36.0
 
Feb. 20, 2021, 8 a.m. 11.0 ppb (11) 5.0 ppb (5) N/A 5.0 ppb (5) N/A N/A 38.0 ppb (36) N/A N/A 7.0 μg/m3 (30) 36.0
 
Feb. 20, 2021, 7 a.m. 7.0 ppb (7) 4.0 ppb (4) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (36) N/A N/A 6.9 μg/m3 (29) 36.0
 
Feb. 20, 2021, 6 a.m. 9.0 ppb (9) 5.0 ppb (5) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (31) N/A N/A 6.7 μg/m3 (28) 31.0
 
Feb. 20, 2021, 5 a.m. 24.0 ppb (23) 9.0 ppb (9) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 20.0 ppb (19) N/A N/A N/A 23.0
 
Feb. 20, 2021, 4 a.m. 41.0 ppb (39) 17.0 ppb (17) N/A 24.0 ppb (23) N/A 0.0 ppb (0) 4.0 ppb (4) N/A N/A 9.7 μg/m3 (41) 41.0
 
Feb. 20, 2021, 3 a.m. 26.0 ppb (25) 10.0 ppb (10) N/A 16.0 ppb (16) N/A 0.0 ppb (0) 14.0 ppb (13) N/A N/A 7.3 μg/m3 (31) 31.0
 
Feb. 20, 2021, 2 a.m. 25.0 ppb (24) 9.0 ppb (9) N/A 16.0 ppb (16) N/A 0.0 ppb (0) 11.0 ppb (11) N/A N/A 6.9 μg/m3 (29) 29.0
 
Feb. 20, 2021, 1 a.m. 17.0 ppb (17) 6.0 ppb (6) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 17.0 ppb (16) N/A N/A 7.5 μg/m3 (32) 32.0
 
Feb. 20, 2021, midnight 12.0 ppb (12) 3.0 ppb (3) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 20.0 ppb (19) N/A N/A 6.9 μg/m3 (29) 29.0
 
Feb. 19, 2021, 11 p.m. 11.0 ppb (11) 3.0 ppb (3) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 7.2 μg/m3 (31) 31.0
 
Feb. 19, 2021, 10 p.m. 13.0 ppb (13) 4.0 ppb (4) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 7.5 μg/m3 (32) 32.0
 
Feb. 19, 2021, 9 p.m. 26.0 ppb (25) 13.0 ppb (13) N/A 13.0 ppb (13) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A N/A 25.0
 
Feb. 19, 2021, 8 p.m. 34.0 ppb (33) 19.0 ppb (18) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 4.4 μg/m3 (19) 33.0
 
Feb. 19, 2021, 7 p.m. 42.0 ppb (40) 25.0 ppb (24) N/A 17.0 ppb (17) N/A 0.0 ppb (0) 23.0 ppb (22) N/A N/A 4.9 μg/m3 (21) 40.0
 
Feb. 19, 2021, 6 p.m. 28.0 ppb (27) 16.0 ppb (16) N/A 12.0 ppb (12) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 5.7 μg/m3 (24) 27.0
 
Feb. 19, 2021, 5 p.m. 53.0 ppb (50) 36.0 ppb (34) N/A 16.0 ppb (16) N/A 0.0 ppb (0) 22.0 ppb (21) N/A N/A 6.7 μg/m3 (28) 50.0
 
Feb. 19, 2021, 4 p.m. 46.0 ppb (44) 29.0 ppb (28) N/A 17.0 ppb (17) N/A 0.0 ppb (0) 20.0 ppb (19) N/A N/A 7.2 μg/m3 (31) 44.0
 
Feb. 19, 2021, 3 p.m. 41.0 ppb (39) 24.0 ppb (23) N/A 16.0 ppb (16) N/A 0.0 ppb (0) 21.0 ppb (20) N/A N/A 8.4 μg/m3 (36) 39.0
 
Feb. 19, 2021, 2 p.m. 42.0 ppb (40) 25.0 ppb (24) N/A 17.0 ppb (17) N/A 0.0 ppb (0) 19.0 ppb (18) N/A N/A 8.3 μg/m3 (35) 40.0
 
Feb. 19, 2021, 1 p.m. 30.0 ppb (29) 17.0 ppb (17) N/A 12.0 ppb (12) N/A 0.0 ppb (0) 23.0 ppb (22) N/A N/A N/A 29.0
 
Feb. 19, 2021, noon 31.0 ppb (30) 16.0 ppb (16) N/A 15.0 ppb (15) N/A 0.0 ppb (0) 20.0 ppb (19) N/A N/A 5.7 μg/m3 (24) 30.0
 
Feb. 19, 2021, 11 a.m. 35.0 ppb (34) 20.0 ppb (19) N/A 15.0 ppb (15) N/A 0.0 ppb (0) 20.0 ppb (19) N/A N/A 6.5 μg/m3 (28) 34.0
 
Feb. 19, 2021, 10 a.m. 36.0 ppb (34) 21.0 ppb (20) N/A 14.0 ppb (14) N/A 0.0 ppb (0) N/A N/A N/A 5.9 μg/m3 (25) 34.0
 
Feb. 19, 2021, 9 a.m. 24.0 ppb (23) 12.0 ppb (12) N/A 11.0 ppb (11) N/A 0.0 ppb (0) 24.0 ppb (23) N/A N/A 6.1 μg/m3 (26) 26.0
 
Feb. 19, 2021, 8 a.m. 17.0 ppb (17) 9.0 ppb (9) N/A 8.0 ppb (8) N/A N/A 26.0 ppb (25) N/A N/A 6.8 μg/m3 (29) 29.0
 
Feb. 19, 2021, 7 a.m. 16.0 ppb (16) 8.0 ppb (8) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 7.0 μg/m3 (30) 30.0
 
Feb. 19, 2021, 6 a.m. 19.0 ppb (18) 11.0 ppb (11) N/A 8.0 ppb (8) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 7.6 μg/m3 (32) 32.0
 
Feb. 19, 2021, 5 a.m. 15.0 ppb (15) 8.0 ppb (8) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A N/A 28.0
 
Feb. 19, 2021, 4 a.m. 12.0 ppb (12) 6.0 ppb (6) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 5.4 μg/m3 (23) 29.0
 
Feb. 19, 2021, 3 a.m. 14.0 ppb (14) 8.0 ppb (8) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 6.0 μg/m3 (25) 28.0
 
Feb. 19, 2021, 2 a.m. 16.0 ppb (16) 8.0 ppb (8) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 31.0 ppb (29) N/A N/A 6.2 μg/m3 (26) 29.0
 
Feb. 19, 2021, 1 a.m. 27.0 ppb (26) 14.0 ppb (14) N/A 12.0 ppb (12) N/A 0.0 ppb (0) 27.0 ppb (25) N/A N/A 7.7 μg/m3 (33) 33.0
 
Feb. 19, 2021, midnight 21.0 ppb (20) 11.0 ppb (11) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 10.4 μg/m3 (44) 44.0
 
Feb. 18, 2021, 10 p.m. 29.0 ppb (28) 15.0 ppb (15) N/A 13.0 ppb (13) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 10.9 μg/m3 (46) 46.0
 
Feb. 18, 2021, 9 p.m. 25.0 ppb (24) 14.0 ppb (14) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 29.0 ppb (27) N/A N/A N/A 27.0
 
Feb. 18, 2021, 8 p.m. 27.0 ppb (26) 15.0 ppb (15) N/A 11.0 ppb (11) N/A 0.0 ppb (0) N/A N/A N/A 3.7 μg/m3 (16) 26.0
 
Feb. 18, 2021, 7 p.m. 20.0 ppb (19) 10.0 ppb (10) N/A 9.0 ppb (9) N/A 0.0 ppb (0) N/A N/A N/A 3.0 μg/m3 (13) 19.0
 
Feb. 18, 2021, 6 p.m. 25.0 ppb (24) 14.0 ppb (14) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 30.0 ppb (28) N/A N/A 1.5 μg/m3 (7) 28.0
 
Feb. 18, 2021, 5 p.m. 17.0 ppb (17) 10.0 ppb (10) N/A 7.0 ppb (7) N/A 0.0 ppb (0) 32.0 ppb (30) N/A N/A 1.8 μg/m3 (8) 30.0
 
Feb. 18, 2021, 4 p.m. 29.0 ppb (28) 15.0 ppb (15) N/A 14.0 ppb (14) N/A 0.0 ppb (0) 26.0 ppb (25) N/A N/A 3.9 μg/m3 (17) 28.0
 
Feb. 18, 2021, 3 p.m. 24.0 ppb (23) 14.0 ppb (14) N/A 10.0 ppb (10) N/A 0.0 ppb (0) 28.0 ppb (26) N/A N/A 3.8 μg/m3 (16) 26.0