AQSQID: 340410007

Site Name: Columbia

Location: Knowlton (Delaware Rd), NJ

Reporting: True, Located: True

Current AQI: 23.0

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
March 28, 2020, 10 a.m. 7.0 ppb (6) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A N/A N/A 5.5 μg/m3 (23) 23.0
 
March 28, 2020, 9 a.m. 25.0 ppb (23) 11.0 ppb (10) N/A 14.0 ppb (13) N/A 0.0 ppb (0) N/A N/A N/A 6.3 μg/m3 (26) 26.0
 
March 28, 2020, 8 a.m. 26.0 ppb (24) 9.0 ppb (8) N/A 17.0 ppb (16) N/A N/A N/A N/A N/A 8.0 μg/m3 (33) 33.0
 
March 28, 2020, 7 a.m. 68.0 ppb (65) 39.0 ppb (36) N/A 29.0 ppb (27) N/A 1.0 ppb (1) N/A N/A N/A 7.8 μg/m3 (32) 65.0
 
March 28, 2020, 6 a.m. 50.0 ppb (46) 28.0 ppb (26) N/A 21.0 ppb (19) N/A 0.0 ppb (0) N/A N/A N/A 7.8 μg/m3 (32) 46.0
 
March 28, 2020, 5 a.m. 32.0 ppb (30) 9.0 ppb (8) N/A 23.0 ppb (21) N/A 0.0 ppb (0) N/A N/A N/A N/A 30.0
 
March 28, 2020, 4 a.m. 34.0 ppb (31) 12.0 ppb (11) N/A 21.0 ppb (19) N/A 0.0 ppb (0) N/A N/A N/A 5.5 μg/m3 (23) 31.0
 
March 28, 2020, 3 a.m. 40.0 ppb (37) 15.0 ppb (14) N/A 25.0 ppb (23) N/A 0.0 ppb (0) N/A N/A N/A 5.4 μg/m3 (23) 37.0
 
March 28, 2020, 2 a.m. 30.0 ppb (28) 6.0 ppb (6) N/A 23.0 ppb (21) N/A 0.0 ppb (0) N/A N/A N/A 6.8 μg/m3 (28) 28.0
 
March 28, 2020, 1 a.m. 29.0 ppb (27) 6.0 ppb (6) N/A 23.0 ppb (21) N/A 0.0 ppb (0) N/A N/A N/A 7.6 μg/m3 (32) 32.0
 
March 28, 2020, midnight 20.0 ppb (19) 2.0 ppb (2) N/A 18.0 ppb (17) N/A 0.0 ppb (0) N/A N/A N/A 6.6 μg/m3 (28) 28.0
 
March 27, 2020, 11 p.m. 19.0 ppb (18) 4.0 ppb (4) N/A 14.0 ppb (13) N/A 0.0 ppb (0) N/A N/A N/A 3.3 μg/m3 (14) 18.0
 
March 27, 2020, 10 p.m. 10.0 ppb (9) 3.0 ppb (3) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A N/A N/A 0.2 μg/m3 (1) 9.0
 
March 27, 2020, 9 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A N/A 4.0
 
March 27, 2020, 8 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A N/A 0.0 μg/m3 (0) 4.0
 
March 27, 2020, 7 p.m. 7.0 ppb (6) 3.0 ppb (3) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 0.1 μg/m3 (0) 6.0
 
March 27, 2020, 6 p.m. 10.0 ppb (9) 4.0 ppb (4) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 1.2 μg/m3 (5) 9.0
 
March 27, 2020, 5 p.m. 10.0 ppb (9) 5.0 ppb (5) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 0.9 μg/m3 (4) 9.0
 
March 27, 2020, 4 p.m. 16.0 ppb (15) 9.0 ppb (8) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 1.9 μg/m3 (8) 15.0
 
March 27, 2020, 3 p.m. 14.0 ppb (13) 8.0 ppb (7) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 4.3 μg/m3 (18) 18.0
 
March 27, 2020, 2 p.m. 18.0 ppb (17) 11.0 ppb (10) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A N/A N/A 5.4 μg/m3 (23) 23.0
 
March 27, 2020, 1 p.m. 24.0 ppb (22) 13.0 ppb (12) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A N/A 22.0
 
March 27, 2020, noon 22.0 ppb (20) 11.0 ppb (10) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 5.0 ppb (4) N/A N/A 10.4 μg/m3 (43) 43.0
 
March 27, 2020, 11 a.m. 19.0 ppb (18) 9.0 ppb (8) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 10.0 ppb (8) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 27, 2020, 10 a.m. 37.0 ppb (34) 19.0 ppb (18) N/A 18.0 ppb (17) N/A 1.0 ppb (1) N/A N/A N/A 10.7 μg/m3 (45) 45.0
 
March 27, 2020, 9 a.m. 23.0 ppb (21) 9.0 ppb (8) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 10.0 ppb (8) N/A N/A 10.0 μg/m3 (42) 42.0
 
March 27, 2020, 8 a.m. 12.0 ppb (11) 4.0 ppb (4) N/A 8.0 ppb (7) N/A N/A 20.0 ppb (15) N/A N/A 9.4 μg/m3 (39) 39.0
 
March 27, 2020, 7 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 30.0 ppb (23) N/A N/A 8.9 μg/m3 (37) 37.0
 
March 27, 2020, 6 a.m. 2.0 ppb (2) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A 9.2 μg/m3 (38) 38.0
 
March 27, 2020, 5 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 34.0 ppb (26) N/A N/A N/A 26.0
 
March 27, 2020, 4 a.m. 4.0 ppb (4) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 35.0 ppb (27) N/A N/A 11.7 μg/m3 (49) 49.0
 
March 27, 2020, 3 a.m. 70.0 ppb (67) 43.0 ppb (40) N/A 26.0 ppb (24) N/A 1.0 ppb (1) 11.0 ppb (8) N/A N/A 12.6 μg/m3 (51) 67.0
 
March 27, 2020, 2 a.m. 18.0 ppb (17) 6.0 ppb (6) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 20.0 ppb (15) N/A N/A 14.7 μg/m3 (56) 56.0
 
March 27, 2020, 1 a.m. 36.0 ppb (33) 14.0 ppb (13) N/A 21.0 ppb (19) N/A 0.0 ppb (0) 6.0 ppb (5) N/A N/A 17.4 μg/m3 (61) 61.0
 
March 27, 2020, midnight 32.0 ppb (30) 12.0 ppb (11) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 9.0 ppb (7) N/A N/A 16.3 μg/m3 (59) 59.0
 
March 26, 2020, 11 p.m. 10.0 ppb (9) 0.0 ppb (0) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 29.0 ppb (22) N/A N/A 13.1 μg/m3 (52) 52.0
 
March 26, 2020, 10 p.m. 6.0 ppb (6) 0.0 ppb (0) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A 10.1 μg/m3 (42) 42.0
 
March 26, 2020, 9 p.m. 5.0 ppb (5) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 40.0 ppb (31) N/A N/A N/A 31.0
 
March 26, 2020, 8 p.m. 5.0 ppb (5) 0.0 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 40.0 ppb (31) N/A N/A 6.0 μg/m3 (25) 31.0
 
March 26, 2020, 7 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (1) 38.0 ppb (29) N/A N/A 4.0 μg/m3 (17) 29.0
 
March 26, 2020, 6 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 36.0 ppb (28) N/A N/A 2.9 μg/m3 (12) 28.0
 
March 26, 2020, 5 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A 3.0 μg/m3 (12) 29.0
 
March 26, 2020, 4 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (1) 32.0 ppb (25) N/A N/A 6.6 μg/m3 (28) 28.0
 
March 26, 2020, 3 p.m. 5.0 ppb (5) 1.0 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 11.1 μg/m3 (46) 46.0
 
March 26, 2020, 2 p.m. 17.0 ppb (16) 9.0 ppb (8) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 15.0 ppb (12) N/A N/A 13.7 μg/m3 (54) 54.0
 
March 26, 2020, 1 p.m. 35.0 ppb (32) 22.0 ppb (20) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 6.0 ppb (5) N/A N/A N/A 32.0
 
March 26, 2020, noon 26.0 ppb (24) 14.0 ppb (13) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 6.0 ppb (5) N/A N/A 9.4 μg/m3 (39) 39.0
 
March 26, 2020, 11 a.m. 44.0 ppb (41) 30.0 ppb (28) N/A 13.0 ppb (12) N/A 1.0 ppb (1) N/A N/A N/A 11.4 μg/m3 (48) 48.0
 
March 26, 2020, 10 a.m. 115.0 ppb (103) 97.0 ppb (96) N/A 18.0 ppb (17) N/A 2.0 ppb (3) N/A N/A N/A 10.7 μg/m3 (45) 103.0
 
March 26, 2020, 9 a.m. 106.0 ppb (101) 87.0 ppb (85) N/A 19.0 ppb (18) N/A 2.0 ppb (3) N/A N/A N/A 10.6 μg/m3 (44) 101.0
 
March 26, 2020, 8 a.m. 103.0 ppb (100) 80.0 ppb (78) N/A 22.0 ppb (20) N/A N/A 0.0 ppb (0) N/A N/A 10.3 μg/m3 (43) 100.0
 
March 26, 2020, 7 a.m. 94.0 ppb (93) 73.0 ppb (70) N/A 20.0 ppb (19) N/A 1.0 ppb (1) 0.0 ppb (0) N/A N/A 9.6 μg/m3 (40) 93.0
 
March 26, 2020, 6 a.m. 72.0 ppb (69) 51.0 ppb (47) N/A 20.0 ppb (19) N/A 1.0 ppb (1) 0.0 ppb (0) N/A N/A 7.1 μg/m3 (30) 69.0
 
March 26, 2020, 5 a.m. 87.0 ppb (85) 63.0 ppb (60) N/A 24.0 ppb (22) N/A 1.0 ppb (1) 0.0 ppb (0) N/A N/A N/A 85.0
 
March 26, 2020, 4 a.m. 37.0 ppb (34) 17.0 ppb (16) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 0.0 ppb (0) N/A N/A 11.8 μg/m3 (49) 49.0
 
March 26, 2020, 3 a.m. 64.0 ppb (61) 39.0 ppb (36) N/A 25.0 ppb (23) N/A 1.0 ppb (1) 0.0 ppb (0) N/A N/A 10.6 μg/m3 (44) 61.0
 
March 26, 2020, 2 a.m. 91.0 ppb (89) 63.0 ppb (60) N/A 28.0 ppb (26) N/A 1.0 ppb (1) 0.0 ppb (0) N/A N/A 11.1 μg/m3 (46) 89.0
 
March 26, 2020, 1 a.m. 78.0 ppb (76) 48.0 ppb (44) N/A 30.0 ppb (28) N/A 0.0 ppb (0) 1.0 ppb (1) N/A N/A 9.4 μg/m3 (39) 76.0
 
March 26, 2020, midnight 24.0 ppb (22) 7.0 ppb (6) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 14.0 ppb (11) N/A N/A 8.6 μg/m3 (36) 36.0
 
March 25, 2020, 11 p.m. 38.0 ppb (35) 19.0 ppb (18) N/A 18.0 ppb (17) N/A 0.0 ppb (0) 19.0 ppb (15) N/A N/A 6.3 μg/m3 (26) 35.0
 
March 25, 2020, 10 p.m. 28.0 ppb (26) 14.0 ppb (13) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 24.0 ppb (18) N/A N/A 5.2 μg/m3 (22) 26.0
 
March 25, 2020, 9 p.m. 21.0 ppb (19) 10.0 ppb (9) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 28.0 ppb (22) N/A N/A N/A 22.0
 
March 25, 2020, 8 p.m. 17.0 ppb (16) 8.0 ppb (7) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 29.0 ppb (22) N/A N/A 3.3 μg/m3 (14) 22.0
 
March 25, 2020, 7 p.m. 19.0 ppb (18) 9.0 ppb (8) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 29.0 ppb (22) N/A N/A 3.3 μg/m3 (14) 22.0
 
March 25, 2020, 6 p.m. 31.0 ppb (29) 17.0 ppb (16) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 23.0 ppb (18) N/A N/A 3.0 μg/m3 (12) 29.0
 
March 25, 2020, 5 p.m. 25.0 ppb (23) 11.0 ppb (10) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 26.0 ppb (20) N/A N/A 1.8 μg/m3 (8) 23.0
 
March 25, 2020, 4 p.m. 27.0 ppb (25) 15.0 ppb (14) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 24.0 ppb (18) N/A N/A 1.3 μg/m3 (5) 25.0
 
March 25, 2020, 3 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 24.0 ppb (18) N/A N/A 1.5 μg/m3 (6) 18.0
 
March 25, 2020, 2 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 23.0 ppb (18) N/A N/A 2.1 μg/m3 (9) 18.0
 
March 25, 2020, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 21.0 ppb (16) N/A N/A N/A 16.0
 
March 25, 2020, noon 32.0 ppb (30) 17.0 ppb (16) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 18.0 ppb (14) N/A N/A 1.7 μg/m3 (7) 30.0
 
March 25, 2020, 11 a.m. 22.0 ppb (20) 10.0 ppb (9) N/A 11.0 ppb (10) N/A 0.0 ppb (0) N/A N/A N/A 4.0 μg/m3 (17) 20.0
 
March 25, 2020, 10 a.m. 35.0 ppb (32) 17.0 ppb (16) N/A 18.0 ppb (17) N/A 0.0 ppb (0) N/A N/A N/A 3.5 μg/m3 (15) 32.0
 
March 25, 2020, 9 a.m. 37.0 ppb (34) 20.0 ppb (19) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 16.0 ppb (12) N/A N/A 3.9 μg/m3 (16) 34.0
 
March 25, 2020, 8 a.m. 36.0 ppb (33) 18.0 ppb (17) N/A 17.0 ppb (16) N/A N/A 16.0 ppb (12) N/A N/A 4.7 μg/m3 (20) 33.0
 
March 25, 2020, 7 a.m. 17.0 ppb (16) 6.0 ppb (6) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 21.0 ppb (16) N/A N/A 5.0 μg/m3 (21) 21.0
 
March 25, 2020, 6 a.m. 11.0 ppb (10) 3.0 ppb (3) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 5.7 μg/m3 (24) 24.0
 
March 25, 2020, 5 a.m. 21.0 ppb (19) 9.0 ppb (8) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 22.0 ppb (17) N/A N/A N/A 19.0
 
March 25, 2020, 4 a.m. 25.0 ppb (23) 12.0 ppb (11) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 20.0 ppb (15) N/A N/A 6.0 μg/m3 (25) 25.0
 
March 25, 2020, 3 a.m. 38.0 ppb (35) 15.0 ppb (14) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 12.0 ppb (9) N/A N/A 9.9 μg/m3 (41) 41.0
 
March 25, 2020, 2 a.m. 46.0 ppb (43) 22.0 ppb (20) N/A 23.0 ppb (21) N/A 0.0 ppb (0) 11.0 ppb (8) N/A N/A 14.3 μg/m3 (55) 55.0
 
March 25, 2020, 1 a.m. 47.0 ppb (44) 24.0 ppb (22) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 8.0 ppb (6) N/A N/A 17.0 μg/m3 (61) 61.0
 
March 25, 2020, midnight 43.0 ppb (40) 21.0 ppb (19) N/A 21.0 ppb (19) N/A 0.0 ppb (0) 13.0 ppb (10) N/A N/A 7.6 μg/m3 (32) 40.0
 
March 24, 2020, 11 p.m. 49.0 ppb (45) 30.0 ppb (28) N/A 19.0 ppb (18) N/A 0.0 ppb (0) 17.0 ppb (13) N/A N/A 6.9 μg/m3 (29) 45.0
 
March 24, 2020, 10 p.m. 21.0 ppb (19) 8.0 ppb (7) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 5.1 μg/m3 (21) 21.0
 
March 24, 2020, 9 p.m. 15.0 ppb (14) 6.0 ppb (6) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A N/A 24.0
 
March 24, 2020, 8 p.m. 13.0 ppb (12) 6.0 ppb (6) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 34.0 ppb (26) N/A N/A 0.9 μg/m3 (4) 26.0
 
March 24, 2020, 7 p.m. 8.0 ppb (7) 4.0 ppb (4) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 36.0 ppb (28) N/A N/A 1.4 μg/m3 (6) 28.0
 
March 24, 2020, 6 p.m. 5.0 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A 1.2 μg/m3 (5) 28.0
 
March 24, 2020, 5 p.m. 12.0 ppb (11) 7.0 ppb (6) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A -1.4 μg/m3 (0) 25.0
 
March 24, 2020, 4 p.m. 15.0 ppb (14) 7.0 ppb (6) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A -2.8 μg/m3 (0) 24.0
 
March 24, 2020, 3 p.m. 29.0 ppb (27) 18.0 ppb (17) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 27.0 ppb (21) N/A N/A -3.1 μg/m3 (0) 27.0
 
March 24, 2020, 2 p.m. 22.0 ppb (20) 13.0 ppb (12) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 27.0 ppb (21) N/A N/A -2.6 μg/m3 (0) 21.0
 
March 24, 2020, 1 p.m. 27.0 ppb (25) 16.0 ppb (15) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 23.0 ppb (18) N/A N/A N/A 25.0
 
March 24, 2020, noon 30.0 ppb (28) 18.0 ppb (17) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 20.0 ppb (15) N/A N/A 2.8 μg/m3 (12) 28.0
 
March 24, 2020, 11 a.m. 24.0 ppb (22) 12.0 ppb (11) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 20.0 ppb (15) N/A N/A 2.9 μg/m3 (12) 22.0
 
March 24, 2020, 10 a.m. 34.0 ppb (31) 18.0 ppb (17) N/A 16.0 ppb (15) N/A 0.0 ppb (0) N/A N/A N/A 2.9 μg/m3 (12) 31.0
 
March 24, 2020, 9 a.m. 41.0 ppb (38) 24.0 ppb (22) N/A 17.0 ppb (16) N/A N/A 15.0 ppb (12) N/A N/A 4.3 μg/m3 (18) 38.0
 
March 24, 2020, 8 a.m. 30.0 ppb (28) 16.0 ppb (15) N/A 14.0 ppb (13) N/A N/A 16.0 ppb (12) N/A N/A 6.0 μg/m3 (25) 28.0
 
March 24, 2020, 7 a.m. 68.0 ppb (65) 44.0 ppb (41) N/A 23.0 ppb (21) N/A 1.0 ppb (1) 7.0 ppb (5) N/A N/A 7.4 μg/m3 (31) 65.0
 
March 24, 2020, 6 a.m. 35.0 ppb (32) 19.0 ppb (18) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 10.0 ppb (8) N/A N/A 8.2 μg/m3 (34) 34.0
 
March 24, 2020, 5 a.m. 31.0 ppb (29) 14.0 ppb (13) N/A 16.0 ppb (15) N/A 0.0 ppb (0) 14.0 ppb (11) N/A N/A N/A 29.0
 
March 24, 2020, 4 a.m. 29.0 ppb (27) 11.0 ppb (10) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 16.0 ppb (12) N/A N/A 2.4 μg/m3 (10) 27.0
 
March 24, 2020, 3 a.m. 22.0 ppb (20) 8.0 ppb (7) N/A 14.0 ppb (13) N/A 0.0 ppb (0) 18.0 ppb (14) N/A N/A 1.9 μg/m3 (8) 20.0
 
March 24, 2020, 2 a.m. 33.0 ppb (31) 16.0 ppb (15) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 18.0 ppb (14) N/A N/A 2.0 μg/m3 (8) 31.0
 
March 24, 2020, 1 a.m. 29.0 ppb (27) 14.0 ppb (13) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 22.0 ppb (17) N/A N/A 2.2 μg/m3 (9) 27.0
 
March 24, 2020, midnight 27.0 ppb (25) 13.0 ppb (12) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 23.0 ppb (18) N/A N/A 2.3 μg/m3 (10) 25.0
 
March 23, 2020, 11 p.m. 39.0 ppb (36) 21.0 ppb (19) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 20.0 ppb (15) N/A N/A 1.1 μg/m3 (5) 36.0
 
March 23, 2020, 10 p.m. 23.0 ppb (21) 11.0 ppb (10) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 26.0 ppb (20) N/A N/A 1.2 μg/m3 (5) 21.0
 
March 23, 2020, 9 p.m. 34.0 ppb (31) 17.0 ppb (16) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 21.0 ppb (16) N/A N/A N/A 31.0
 
March 23, 2020, 8 p.m. 22.0 ppb (20) 9.0 ppb (8) N/A 13.0 ppb (12) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A -0.1 μg/m3 (0) 20.0
 
March 23, 2020, 7 p.m. 25.0 ppb (23) 9.0 ppb (8) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 23.0 ppb (18) N/A N/A 0.4 μg/m3 (2) 23.0
 
March 23, 2020, 6 p.m. 24.0 ppb (22) 8.0 ppb (7) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 23.0 ppb (18) N/A N/A 0.3 μg/m3 (1) 22.0
 
March 23, 2020, 5 p.m. 24.0 ppb (22) 9.0 ppb (8) N/A 15.0 ppb (14) N/A 0.0 ppb (0) 24.0 ppb (18) N/A N/A 1.6 μg/m3 (7) 22.0
 
March 23, 2020, 4 p.m. 35.0 ppb (32) 15.0 ppb (14) N/A 20.0 ppb (19) N/A 0.0 ppb (0) 18.0 ppb (14) N/A N/A 3.9 μg/m3 (16) 32.0
 
March 23, 2020, 3 p.m. 36.0 ppb (33) 14.0 ppb (13) N/A 21.0 ppb (19) N/A 0.0 ppb (0) 17.0 ppb (13) N/A N/A 4.8 μg/m3 (20) 33.0
 
March 23, 2020, 2 p.m. 39.0 ppb (36) 17.0 ppb (16) N/A 21.0 ppb (19) N/A 0.0 ppb (0) 16.0 ppb (12) N/A N/A 4.7 μg/m3 (20) 36.0
 
March 23, 2020, 1 p.m. 42.0 ppb (39) 19.0 ppb (18) N/A 22.0 ppb (20) N/A 0.0 ppb (0) 14.0 ppb (11) N/A N/A N/A 39.0
 
March 23, 2020, noon 26.0 ppb (24) 8.0 ppb (7) N/A 17.0 ppb (16) N/A 0.0 ppb (0) 19.0 ppb (15) N/A N/A 4.6 μg/m3 (19) 24.0
 
March 23, 2020, 11 a.m. 29.0 ppb (27) 10.0 ppb (9) N/A 18.0 ppb (17) N/A 0.0 ppb (0) N/A N/A N/A 5.3 μg/m3 (22) 27.0
 
March 23, 2020, 10 a.m. 26.0 ppb (24) 9.0 ppb (8) N/A 17.0 ppb (16) N/A 0.0 ppb (0) N/A N/A N/A 4.0 μg/m3 (17) 24.0
 
March 23, 2020, 9 a.m. 24.0 ppb (22) 9.0 ppb (8) N/A 15.0 ppb (14) N/A N/A 25.0 ppb (19) N/A N/A 4.3 μg/m3 (18) 22.0
 
March 23, 2020, 8 a.m. 18.0 ppb (17) 6.0 ppb (6) N/A 12.0 ppb (11) N/A N/A 28.0 ppb (22) N/A N/A 5.4 μg/m3 (23) 23.0
 
March 23, 2020, 7 a.m. 14.0 ppb (13) 4.0 ppb (4) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A 7.4 μg/m3 (31) 31.0
 
March 23, 2020, 6 a.m. 10.0 ppb (9) 3.0 ppb (3) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A 9.2 μg/m3 (38) 38.0
 
March 23, 2020, 5 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A N/A 27.0
 
March 23, 2020, 4 a.m. 6.0 ppb (6) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 36.0 ppb (28) N/A N/A 6.0 μg/m3 (25) 28.0
 
March 23, 2020, 3 a.m. 5.0 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A 7.3 μg/m3 (30) 30.0
 
March 23, 2020, 2 a.m. 3.0 ppb (3) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 8.6 μg/m3 (36) 36.0
 
March 23, 2020, 1 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A 10.2 μg/m3 (42) 42.0
 
March 23, 2020, midnight 9.0 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A 11.1 μg/m3 (46) 46.0
 
March 22, 2020, 11 p.m. 11.0 ppb (10) 1.0 ppb (1) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 36.0 ppb (28) N/A N/A 9.7 μg/m3 (40) 40.0
 
March 22, 2020, 10 p.m. 6.0 ppb (6) 0.0 ppb (0) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A 8.1 μg/m3 (34) 34.0
 
March 22, 2020, 9 p.m. 4.0 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 41.0 ppb (32) N/A N/A N/A 32.0
 
March 22, 2020, 8 p.m. 1.0 ppb (1) 0.0 ppb (0) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 44.0 ppb (34) N/A N/A 4.0 μg/m3 (17) 34.0
 
March 22, 2020, 7 p.m. 2.0 ppb (2) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 1.9 μg/m3 (8) 32.0
 
March 22, 2020, 6 p.m. 0.0 ppb (0) 0.0 ppb (0) N/A 0.0 ppb (0) N/A 0.0 ppb (0) 42.0 ppb (32) N/A N/A 0.1 μg/m3 (0) 32.0
 
March 22, 2020, 5 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 40.0 ppb (31) N/A N/A -0.1 μg/m3 (0) 31.0
 
March 22, 2020, 4 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 0.5 μg/m3 (2) 30.0
 
March 22, 2020, 3 p.m. 5.0 ppb (5) 3.0 ppb (3) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 37.0 ppb (28) N/A N/A -0.4 μg/m3 (0) 28.0
 
March 22, 2020, 2 p.m. 11.0 ppb (10) 4.0 ppb (4) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 36.0 ppb (28) N/A N/A 1.5 μg/m3 (6) 28.0
 
March 22, 2020, 1 p.m. N/A N/A N/A N/A N/A 0.0 ppb (0) 36.0 ppb (28) N/A N/A N/A 28.0
 
March 22, 2020, noon 3.0 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 5.1 μg/m3 (21) 27.0
 
March 22, 2020, 11 a.m. 13.0 ppb (12) 4.0 ppb (4) N/A 9.0 ppb (8) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 8.3 μg/m3 (35) 35.0
 
March 22, 2020, 10 a.m. 12.0 ppb (11) 4.0 ppb (4) N/A 7.0 ppb (6) N/A 0.0 ppb (0) N/A N/A N/A 10.8 μg/m3 (45) 45.0
 
March 22, 2020, 9 a.m. 15.0 ppb (14) 6.0 ppb (6) N/A 8.0 ppb (7) N/A 0.0 ppb (0) 24.0 ppb (18) N/A N/A 7.0 μg/m3 (29) 29.0
 
March 22, 2020, 8 a.m. 7.0 ppb (6) 2.0 ppb (2) N/A 4.0 ppb (4) N/A N/A 30.0 ppb (23) N/A N/A 3.8 μg/m3 (16) 23.0
 
March 22, 2020, 7 a.m. 12.0 ppb (11) 5.0 ppb (5) N/A 7.0 ppb (6) N/A 0.0 ppb (0) 26.0 ppb (20) N/A N/A 5.5 μg/m3 (23) 23.0
 
March 22, 2020, 6 a.m. 7.0 ppb (6) 1.0 ppb (1) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 29.0 ppb (22) N/A N/A 5.1 μg/m3 (21) 22.0
 
March 22, 2020, 5 a.m. 11.0 ppb (10) 5.0 ppb (5) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 29.0 ppb (22) N/A N/A N/A 22.0
 
March 22, 2020, 4 a.m. 5.0 ppb (5) 2.0 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A 7.2 μg/m3 (30) 30.0
 
March 22, 2020, 3 a.m. 8.0 ppb (7) 3.0 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A 7.1 μg/m3 (30) 30.0
 
March 22, 2020, 2 a.m. 9.0 ppb (8) 4.0 ppb (4) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 33.0 ppb (25) N/A N/A 7.3 μg/m3 (30) 30.0
 
March 22, 2020, 1 a.m. 18.0 ppb (17) 5.0 ppb (5) N/A 12.0 ppb (11) N/A 0.0 ppb (0) 27.0 ppb (21) N/A N/A 7.6 μg/m3 (32) 32.0
 
March 22, 2020, midnight 15.0 ppb (14) 3.0 ppb (3) N/A 11.0 ppb (10) N/A 0.0 ppb (0) 25.0 ppb (19) N/A N/A 9.2 μg/m3 (38) 38.0
 
March 21, 2020, 11 p.m. 13.0 ppb (12) 2.0 ppb (2) N/A 10.0 ppb (9) N/A 0.0 ppb (0) 28.0 ppb (22) N/A N/A 6.4 μg/m3 (27) 27.0
 
March 21, 2020, 10 p.m. 10.0 ppb (9) 4.0 ppb (4) N/A 6.0 ppb (6) N/A 0.0 ppb (0) 35.0 ppb (27) N/A N/A 6.0 μg/m3 (25) 27.0
 
March 21, 2020, 9 p.m. 4.0 ppb (4) 1.0 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A N/A 30.0
 
March 21, 2020, 8 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 0.7 μg/m3 (3) 30.0
 
March 21, 2020, 7 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 39.0 ppb (30) N/A N/A 0.4 μg/m3 (2) 30.0
 
March 21, 2020, 6 p.m. 8.0 ppb (7) 4.0 ppb (4) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A 3.1 μg/m3 (13) 29.0
 
March 21, 2020, 5 p.m. 3.0 ppb (3) 2.0 ppb (2) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 38.0 ppb (29) N/A N/A 6.4 μg/m3 (27) 29.0
 
March 21, 2020, 4 p.m. 5.0 ppb (5) 4.0 ppb (4) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 36.0 ppb (28) N/A N/A 12.1 μg/m3 (50) 50.0
 
March 21, 2020, 3 p.m. 8.0 ppb (7) 4.0 ppb (4) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 34.0 ppb (26) N/A N/A 2.9 μg/m3 (12) 26.0
 
March 21, 2020, 2 p.m. 3.0 ppb (3) 1.0 ppb (1) N/A 1.0 ppb (1) N/A 0.0 ppb (0) 34.0 ppb (26) N/A N/A 0.2 μg/m3 (1) 26.0
 
March 21, 2020, 1 p.m. 7.0 ppb (6) 4.0 ppb (4) N/A 3.0 ppb (3) N/A 0.0 ppb (0) 31.0 ppb (24) N/A N/A N/A 24.0
 
March 21, 2020, noon 12.0 ppb (11) 7.0 ppb (6) N/A 4.0 ppb (4) N/A 0.0 ppb (0) 28.0 ppb (22) N/A N/A 8.3 μg/m3 (35) 35.0
 
March 21, 2020, 11 a.m. 13.0 ppb (12) 8.0 ppb (7) N/A 5.0 ppb (5) N/A 0.0 ppb (0) 28.0 ppb (22) N/A N/A 7.1 μg/m3 (30) 30.0