AQSQID: 080310027

Site Name: I25 Denver

Location: Denver (Central W Denver), CO

Reporting: True, Located: True

Current AQI: 18.0

Denver (Central W Denver) CO, US: 39.732144, -105.015313

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
March 28, 2020, 9 a.m. N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.2 ppb (2) N/A 4.4 μg/m3 (18) 18.0
 
March 28, 2020, 8 a.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.2 ppb (2) N/A 4.4 μg/m3 (18) 18.0
 
March 28, 2020, 7 a.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.1 ppb (1) N/A 4.8 μg/m3 (20) 20.0
 
March 28, 2020, 6 a.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.2 ppb (2) N/A 4.4 μg/m3 (18) 18.0
 
March 28, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A N/A 0.2 ppb (2) N/A 3.2 μg/m3 (13) 13.0
 
March 28, 2020, 4 a.m. N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.2 ppb (2) N/A 5.0 μg/m3 (21) 21.0
 
March 28, 2020, 3 a.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.2 ppb (2) N/A 3.3 μg/m3 (14) 15.0
 
March 28, 2020, 2 a.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.3 ppb (3) N/A 3.2 μg/m3 (13) 16.0
 
March 28, 2020, 1 a.m. N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.3 ppb (3) N/A 7.9 μg/m3 (33) 33.0
 
March 28, 2020, midnight N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.3 ppb (3) N/A 6.1 μg/m3 (25) 25.0
 
March 27, 2020, 11 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.4 ppb (4) N/A 9.4 μg/m3 (39) 39.0
 
March 27, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A N/A 0.4 ppb (4) N/A 9.5 μg/m3 (40) 40.0
 
March 27, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A N/A 0.4 ppb (4) N/A 9.5 μg/m3 (40) 40.0
 
March 27, 2020, 8 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.4 ppb (4) N/A 8.8 μg/m3 (37) 37.0
 
March 27, 2020, 7 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.3 ppb (3) N/A 10.5 μg/m3 (44) 44.0
 
March 27, 2020, 6 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A N/A 0.3 ppb (3) N/A 8.7 μg/m3 (36) 36.0
 
March 27, 2020, 5 p.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.3 ppb (3) N/A 8.2 μg/m3 (34) 34.0
 
March 27, 2020, 4 p.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.2 ppb (2) N/A 9.4 μg/m3 (39) 39.0
 
March 27, 2020, 3 p.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.2 ppb (2) N/A 8.6 μg/m3 (36) 36.0
 
March 27, 2020, 2 p.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.2 ppb (2) N/A 6.7 μg/m3 (28) 28.0
 
March 27, 2020, 1 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.2 ppb (2) N/A 7.7 μg/m3 (32) 32.0
 
March 27, 2020, noon N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.2 ppb (2) N/A 11.0 μg/m3 (46) 46.0
 
March 27, 2020, 11 a.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.2 ppb (2) N/A 9.8 μg/m3 (41) 41.0
 
March 27, 2020, 10 a.m. N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 0.2 ppb (2) N/A 8.9 μg/m3 (37) 37.0
 
March 27, 2020, 9 a.m. N/A N/A N/A 26.0 ppb (24) N/A N/A N/A 0.2 ppb (2) N/A 11.2 μg/m3 (47) 47.0
 
March 27, 2020, 8 a.m. N/A N/A N/A 20.0 ppb (19) N/A N/A N/A 0.2 ppb (2) N/A 10.6 μg/m3 (44) 44.0
 
March 27, 2020, 7 a.m. N/A N/A N/A 20.0 ppb (19) N/A N/A N/A 0.2 ppb (2) N/A 10.4 μg/m3 (43) 43.0
 
March 27, 2020, 6 a.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.2 ppb (2) N/A 10.7 μg/m3 (45) 45.0
 
March 27, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A N/A 0.1 ppb (1) N/A 10.3 μg/m3 (43) 43.0
 
March 27, 2020, 4 a.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.1 ppb (1) N/A 9.7 μg/m3 (40) 40.0
 
March 27, 2020, 3 a.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.1 ppb (1) N/A 9.3 μg/m3 (39) 39.0
 
March 27, 2020, 2 a.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.1 ppb (1) N/A 9.3 μg/m3 (39) 39.0
 
March 27, 2020, 1 a.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.2 ppb (2) N/A 11.7 μg/m3 (49) 49.0
 
March 27, 2020, midnight N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.2 ppb (2) N/A 14.0 μg/m3 (54) 54.0
 
March 26, 2020, 11 p.m. N/A N/A N/A 21.0 ppb (19) N/A N/A N/A 0.3 ppb (3) N/A 16.4 μg/m3 (59) 59.0
 
March 26, 2020, 10 p.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.3 ppb (3) N/A 17.8 μg/m3 (62) 62.0
 
March 26, 2020, 9 p.m. N/A N/A N/A 20.0 ppb (19) N/A N/A N/A 0.3 ppb (3) N/A 18.0 μg/m3 (63) 63.0
 
March 26, 2020, 8 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.4 ppb (4) N/A 19.1 μg/m3 (65) 65.0
 
March 26, 2020, 7 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.2 ppb (2) N/A 15.5 μg/m3 (57) 57.0
 
March 26, 2020, 6 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.2 ppb (2) N/A 15.3 μg/m3 (57) 57.0
 
March 26, 2020, 5 p.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.2 ppb (2) N/A 14.9 μg/m3 (56) 56.0
 
March 26, 2020, 4 p.m. N/A N/A N/A 22.0 ppb (20) N/A N/A N/A 0.3 ppb (3) N/A 12.8 μg/m3 (52) 52.0
 
March 26, 2020, 3 p.m. N/A N/A N/A 22.0 ppb (20) N/A N/A N/A 0.4 ppb (4) N/A 9.2 μg/m3 (38) 38.0
 
March 26, 2020, 2 p.m. N/A N/A N/A 22.0 ppb (20) N/A N/A N/A 0.4 ppb (4) N/A 6.2 μg/m3 (26) 26.0
 
March 26, 2020, 1 p.m. N/A N/A N/A 30.0 ppb (28) N/A N/A N/A 0.4 ppb (4) N/A 5.0 μg/m3 (21) 28.0
 
March 26, 2020, noon N/A N/A N/A 34.0 ppb (31) N/A N/A N/A 0.6 ppb (7) N/A 5.2 μg/m3 (22) 31.0
 
March 26, 2020, 11 a.m. N/A N/A N/A 28.0 ppb (26) N/A N/A N/A 0.4 ppb (4) N/A 4.0 μg/m3 (17) 26.0
 
March 26, 2020, 10 a.m. N/A N/A N/A 18.0 ppb (17) N/A N/A N/A 0.2 ppb (2) N/A 3.0 μg/m3 (12) 17.0
 
March 26, 2020, 9 a.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.1 ppb (1) N/A 3.3 μg/m3 (14) 15.0
 
March 26, 2020, 8 a.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.1 ppb (1) N/A 2.6 μg/m3 (11) 11.0
 
March 26, 2020, 7 a.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.1 ppb (1) N/A 2.2 μg/m3 (9) 9.0
 
March 26, 2020, 6 a.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.1 ppb (1) N/A 2.4 μg/m3 (10) 10.0
 
March 26, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A N/A 0.2 ppb (2) N/A 3.5 μg/m3 (15) 15.0
 
March 26, 2020, 4 a.m. N/A N/A N/A 18.0 ppb (17) N/A N/A N/A 0.3 ppb (3) N/A 3.4 μg/m3 (14) 17.0
 
March 26, 2020, 3 a.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.2 ppb (2) N/A 1.9 μg/m3 (8) 10.0
 
March 26, 2020, 2 a.m. N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.3 ppb (3) N/A 2.4 μg/m3 (10) 18.0
 
March 26, 2020, 1 a.m. N/A N/A N/A 23.0 ppb (21) N/A N/A N/A 0.3 ppb (3) N/A 3.0 μg/m3 (12) 21.0
 
March 26, 2020, midnight N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.2 ppb (2) N/A 1.9 μg/m3 (8) 18.0
 
March 25, 2020, 11 p.m. N/A N/A N/A 21.0 ppb (19) N/A N/A N/A 0.4 ppb (4) N/A 3.1 μg/m3 (13) 19.0
 
March 25, 2020, 10 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.3 ppb (3) N/A 3.4 μg/m3 (14) 14.0
 
March 25, 2020, 9 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A N/A 0.3 ppb (3) N/A 3.3 μg/m3 (14) 17.0
 
March 25, 2020, 8 p.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.3 ppb (3) N/A 3.6 μg/m3 (15) 16.0
 
March 25, 2020, 7 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.2 ppb (2) N/A 4.5 μg/m3 (19) 19.0
 
March 25, 2020, 6 p.m. N/A N/A N/A 22.0 ppb (20) N/A N/A N/A 0.3 ppb (3) N/A 6.0 μg/m3 (25) 25.0
 
March 25, 2020, 5 p.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.2 ppb (2) N/A 3.2 μg/m3 (13) 13.0
 
March 25, 2020, 4 p.m. N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.1 ppb (1) N/A 3.4 μg/m3 (14) 14.0
 
March 25, 2020, 3 p.m. N/A N/A N/A 24.0 ppb (22) N/A N/A N/A 0.3 ppb (3) N/A 6.3 μg/m3 (26) 26.0
 
March 25, 2020, 2 p.m. N/A N/A N/A 32.0 ppb (30) N/A N/A N/A 0.5 ppb (6) N/A 5.3 μg/m3 (22) 30.0
 
March 25, 2020, 1 p.m. N/A N/A N/A 41.0 ppb (38) N/A N/A N/A 0.8 ppb (9) N/A 6.8 μg/m3 (28) 38.0
 
March 25, 2020, noon N/A N/A N/A 41.0 ppb (38) N/A N/A N/A 0.9 ppb (10) N/A 7.6 μg/m3 (32) 38.0
 
March 25, 2020, 11 a.m. N/A N/A N/A 37.0 ppb (34) N/A N/A N/A 0.7 ppb (8) N/A 8.4 μg/m3 (35) 35.0
 
March 25, 2020, 10 a.m. N/A N/A N/A 37.0 ppb (34) N/A N/A N/A 0.4 ppb (4) N/A 8.4 μg/m3 (35) 35.0
 
March 25, 2020, 9 a.m. N/A N/A N/A 35.0 ppb (32) N/A N/A N/A 0.4 ppb (4) N/A 5.7 μg/m3 (24) 32.0
 
March 25, 2020, 8 a.m. N/A N/A N/A 35.0 ppb (32) N/A N/A N/A 0.4 ppb (4) N/A 6.3 μg/m3 (26) 32.0
 
March 25, 2020, 7 a.m. N/A N/A N/A 33.0 ppb (31) N/A N/A N/A 0.3 ppb (3) N/A 5.9 μg/m3 (25) 31.0
 
March 25, 2020, 6 a.m. N/A N/A N/A 24.0 ppb (22) N/A N/A N/A 0.2 ppb (2) N/A 4.3 μg/m3 (18) 22.0
 
March 25, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A N/A 0.4 ppb (4) N/A 5.4 μg/m3 (23) 23.0
 
March 25, 2020, 4 a.m. N/A N/A N/A 34.0 ppb (31) N/A N/A N/A 0.5 ppb (6) N/A 6.7 μg/m3 (28) 31.0
 
March 25, 2020, 3 a.m. N/A N/A N/A 29.0 ppb (27) N/A N/A N/A 0.4 ppb (4) N/A 4.6 μg/m3 (19) 27.0
 
March 25, 2020, 2 a.m. N/A N/A N/A 30.0 ppb (28) N/A N/A N/A 0.3 ppb (3) N/A 2.8 μg/m3 (12) 28.0
 
March 25, 2020, 1 a.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.1 ppb (1) N/A 1.4 μg/m3 (6) 11.0
 
March 25, 2020, midnight N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.1 ppb (1) N/A 1.5 μg/m3 (6) 7.0
 
March 24, 2020, 11 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.1 ppb (1) N/A 1.9 μg/m3 (8) 8.0
 
March 24, 2020, 10 p.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.2 ppb (2) N/A 2.5 μg/m3 (10) 10.0
 
March 24, 2020, 9 p.m. N/A N/A N/A 9.0 ppb (8) N/A N/A N/A 0.2 ppb (2) N/A 3.1 μg/m3 (13) 13.0
 
March 24, 2020, 8 p.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.2 ppb (2) N/A 3.0 μg/m3 (12) 12.0
 
March 24, 2020, 7 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.1 ppb (1) N/A 2.9 μg/m3 (12) 12.0
 
March 24, 2020, 6 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.1 ppb (1) N/A 2.6 μg/m3 (11) 11.0
 
March 24, 2020, 5 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.2 ppb (2) N/A 2.9 μg/m3 (12) 12.0
 
March 24, 2020, 4 p.m. N/A N/A N/A 21.0 ppb (19) N/A N/A N/A 0.2 ppb (2) N/A 4.7 μg/m3 (20) 20.0
 
March 24, 2020, 3 p.m. N/A N/A N/A 24.0 ppb (22) N/A N/A N/A 0.3 ppb (3) N/A 5.4 μg/m3 (23) 23.0
 
March 24, 2020, 2 p.m. N/A N/A N/A 31.0 ppb (29) N/A N/A N/A 0.4 ppb (4) N/A 6.5 μg/m3 (27) 29.0
 
March 24, 2020, 1 p.m. N/A N/A N/A 33.0 ppb (31) N/A N/A N/A 0.5 ppb (6) N/A 4.8 μg/m3 (20) 31.0
 
March 24, 2020, noon N/A N/A N/A 36.0 ppb (33) N/A N/A N/A 0.6 ppb (7) N/A 3.2 μg/m3 (13) 33.0
 
March 24, 2020, 11 a.m. N/A N/A N/A 32.0 ppb (30) N/A N/A N/A 0.3 ppb (3) N/A 4.2 μg/m3 (18) 30.0
 
March 24, 2020, 10 a.m. N/A N/A N/A 27.0 ppb (25) N/A N/A N/A 0.2 ppb (2) N/A 3.7 μg/m3 (15) 25.0
 
March 24, 2020, 9 a.m. N/A N/A N/A 27.0 ppb (25) N/A N/A N/A 0.2 ppb (2) N/A 5.0 μg/m3 (21) 25.0
 
March 24, 2020, 8 a.m. N/A N/A N/A 22.0 ppb (20) N/A N/A N/A 0.2 ppb (2) N/A 3.4 μg/m3 (14) 20.0
 
March 24, 2020, 7 a.m. N/A N/A N/A 21.0 ppb (19) N/A N/A N/A 0.2 ppb (2) N/A 2.6 μg/m3 (11) 19.0
 
March 24, 2020, 6 a.m. N/A N/A N/A 21.0 ppb (19) N/A N/A N/A 0.2 ppb (2) N/A 2.9 μg/m3 (12) 19.0
 
March 24, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A N/A 0.2 ppb (2) N/A 2.3 μg/m3 (10) 10.0
 
March 24, 2020, 4 a.m. N/A N/A N/A 14.0 ppb (13) N/A N/A N/A 0.2 ppb (2) N/A 2.0 μg/m3 (8) 13.0
 
March 24, 2020, 3 a.m. N/A N/A N/A 25.0 ppb (23) N/A N/A N/A 0.4 ppb (4) N/A 2.9 μg/m3 (12) 23.0
 
March 24, 2020, 2 a.m. N/A N/A N/A 15.0 ppb (14) N/A N/A N/A 0.3 ppb (3) N/A 2.4 μg/m3 (10) 14.0
 
March 24, 2020, 1 a.m. N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.3 ppb (3) N/A 3.7 μg/m3 (15) 15.0
 
March 24, 2020, midnight N/A N/A N/A 20.0 ppb (19) N/A N/A N/A 0.4 ppb (4) N/A 4.2 μg/m3 (18) 19.0
 
March 23, 2020, 11 p.m. N/A N/A N/A 18.0 ppb (17) N/A N/A N/A 0.3 ppb (3) N/A 3.1 μg/m3 (13) 17.0
 
March 23, 2020, 10 p.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.2 ppb (2) N/A 2.3 μg/m3 (10) 10.0
 
March 23, 2020, 9 p.m. N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.4 ppb (4) N/A 2.9 μg/m3 (12) 18.0
 
March 23, 2020, 8 p.m. N/A N/A N/A 20.0 ppb (19) N/A N/A N/A 0.3 ppb (3) N/A 4.1 μg/m3 (17) 19.0
 
March 23, 2020, 7 p.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.2 ppb (2) N/A 2.9 μg/m3 (12) 12.0
 
March 23, 2020, 6 p.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.2 ppb (2) N/A 3.6 μg/m3 (15) 15.0
 
March 23, 2020, 5 p.m. N/A N/A N/A 21.0 ppb (19) N/A N/A N/A 0.2 ppb (2) N/A 4.8 μg/m3 (20) 20.0
 
March 23, 2020, 4 p.m. N/A N/A N/A 22.0 ppb (20) N/A N/A N/A 0.2 ppb (2) N/A 5.3 μg/m3 (22) 22.0
 
March 23, 2020, 3 p.m. N/A N/A N/A 30.0 ppb (28) N/A N/A N/A 0.4 ppb (4) N/A 4.9 μg/m3 (20) 28.0
 
March 23, 2020, 2 p.m. N/A N/A N/A 29.0 ppb (27) N/A N/A N/A N/A N/A 5.1 μg/m3 (21) 27.0
 
March 23, 2020, 1 p.m. N/A N/A N/A 42.0 ppb (39) N/A N/A N/A 0.6 ppb (7) N/A 5.1 μg/m3 (21) 39.0
 
March 23, 2020, noon N/A N/A N/A 41.0 ppb (38) N/A N/A N/A 0.6 ppb (7) N/A 3.6 μg/m3 (15) 38.0
 
March 23, 2020, 11 a.m. N/A N/A N/A 37.0 ppb (34) N/A N/A N/A 0.4 ppb (4) N/A 2.6 μg/m3 (11) 34.0
 
March 23, 2020, 10 a.m. N/A N/A N/A 36.0 ppb (33) N/A N/A N/A 0.3 ppb (3) N/A 2.5 μg/m3 (10) 33.0
 
March 23, 2020, 9 a.m. N/A N/A N/A 33.0 ppb (31) N/A N/A N/A 0.2 ppb (2) N/A 2.2 μg/m3 (9) 31.0
 
March 23, 2020, 8 a.m. N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.2 ppb (2) N/A 3.2 μg/m3 (13) 18.0
 
March 23, 2020, 7 a.m. N/A N/A N/A 25.0 ppb (23) N/A N/A N/A 0.3 ppb (3) N/A 3.7 μg/m3 (15) 23.0
 
March 23, 2020, 6 a.m. N/A N/A N/A 24.0 ppb (22) N/A N/A N/A 0.3 ppb (3) N/A 4.0 μg/m3 (17) 22.0
 
March 23, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A N/A 0.5 ppb (6) N/A 6.5 μg/m3 (27) 27.0
 
March 23, 2020, 4 a.m. N/A N/A N/A 38.0 ppb (35) N/A N/A N/A 0.5 ppb (6) N/A 6.5 μg/m3 (27) 35.0
 
March 23, 2020, 3 a.m. N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.5 ppb (6) N/A 3.6 μg/m3 (15) 18.0
 
March 23, 2020, 2 a.m. N/A N/A N/A 21.0 ppb (19) N/A N/A N/A 0.4 ppb (4) N/A 2.5 μg/m3 (10) 19.0
 
March 23, 2020, 1 a.m. N/A N/A N/A 18.0 ppb (17) N/A N/A N/A 0.5 ppb (6) N/A 2.6 μg/m3 (11) 17.0
 
March 23, 2020, midnight N/A N/A N/A 13.0 ppb (12) N/A N/A N/A 0.4 ppb (4) N/A 2.0 μg/m3 (8) 12.0
 
March 22, 2020, 11 p.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.3 ppb (3) N/A 1.4 μg/m3 (6) 9.0
 
March 22, 2020, 10 p.m. N/A N/A N/A 10.0 ppb (9) N/A N/A N/A 0.2 ppb (2) N/A 2.6 μg/m3 (11) 11.0
 
March 22, 2020, 9 p.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.2 ppb (2) N/A 4.6 μg/m3 (19) 19.0
 
March 22, 2020, 8 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.2 ppb (2) N/A 4.2 μg/m3 (18) 18.0
 
March 22, 2020, 7 p.m. N/A N/A N/A 8.0 ppb (7) N/A N/A N/A 0.2 ppb (2) N/A 1.0 μg/m3 (4) 7.0
 
March 22, 2020, 6 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A 1.2 μg/m3 (5) 6.0
 
March 22, 2020, 5 p.m. N/A N/A N/A 11.0 ppb (10) N/A N/A N/A 0.2 ppb (2) N/A 6.8 μg/m3 (28) 28.0
 
March 22, 2020, 4 p.m. N/A N/A N/A 20.0 ppb (19) N/A N/A N/A 0.3 ppb (3) N/A 6.5 μg/m3 (27) 27.0
 
March 22, 2020, 3 p.m. N/A N/A N/A 21.0 ppb (19) N/A N/A N/A 0.3 ppb (3) N/A 5.7 μg/m3 (24) 24.0
 
March 22, 2020, 2 p.m. N/A N/A N/A 29.0 ppb (27) N/A N/A N/A 0.5 ppb (6) N/A 5.8 μg/m3 (24) 27.0
 
March 22, 2020, 1 p.m. N/A N/A N/A 33.0 ppb (31) N/A N/A N/A 0.7 ppb (8) N/A 6.8 μg/m3 (28) 31.0
 
March 22, 2020, noon N/A N/A N/A 34.0 ppb (31) N/A N/A N/A 0.5 ppb (6) N/A 7.4 μg/m3 (31) 31.0
 
March 22, 2020, 11 a.m. N/A N/A N/A 33.0 ppb (31) N/A N/A N/A 0.4 ppb (4) N/A 8.8 μg/m3 (37) 37.0
 
March 22, 2020, 10 a.m. N/A N/A N/A 30.0 ppb (28) N/A N/A N/A 0.4 ppb (4) N/A 8.9 μg/m3 (37) 37.0
 
March 22, 2020, 9 a.m. N/A N/A N/A 33.0 ppb (31) N/A N/A N/A 0.5 ppb (6) N/A 11.1 μg/m3 (46) 46.0
 
March 22, 2020, 8 a.m. N/A N/A N/A 36.0 ppb (33) N/A N/A N/A 0.5 ppb (6) N/A 12.4 μg/m3 (51) 51.0
 
March 22, 2020, 7 a.m. N/A N/A N/A 38.0 ppb (35) N/A N/A N/A 0.4 ppb (4) N/A 12.5 μg/m3 (51) 51.0
 
March 22, 2020, 6 a.m. N/A N/A N/A 29.0 ppb (27) N/A N/A N/A 0.3 ppb (3) N/A 9.2 μg/m3 (38) 38.0
 
March 22, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A N/A 0.3 ppb (3) N/A 7.4 μg/m3 (31) 31.0
 
March 22, 2020, 4 a.m. N/A N/A N/A 25.0 ppb (23) N/A N/A N/A 0.3 ppb (3) N/A 6.9 μg/m3 (29) 29.0
 
March 22, 2020, 3 a.m. N/A N/A N/A 19.0 ppb (18) N/A N/A N/A 0.3 ppb (3) N/A 6.2 μg/m3 (26) 26.0
 
March 22, 2020, 2 a.m. N/A N/A N/A 17.0 ppb (16) N/A N/A N/A 0.3 ppb (3) N/A 6.1 μg/m3 (25) 25.0
 
March 22, 2020, 1 a.m. N/A N/A N/A 35.0 ppb (32) N/A N/A N/A 0.5 ppb (6) N/A 17.8 μg/m3 (62) 62.0
 
March 22, 2020, midnight N/A N/A N/A 32.0 ppb (30) N/A N/A N/A 0.6 ppb (7) N/A 20.8 μg/m3 (69) 69.0
 
March 21, 2020, 11 p.m. N/A N/A N/A 26.0 ppb (24) N/A N/A N/A 0.5 ppb (6) N/A 10.7 μg/m3 (45) 45.0
 
March 21, 2020, 10 p.m. N/A N/A N/A 6.0 ppb (6) N/A N/A N/A 0.1 ppb (1) N/A 2.8 μg/m3 (12) 12.0
 
March 21, 2020, 9 p.m. N/A N/A N/A 5.0 ppb (5) N/A N/A N/A 0.2 ppb (2) N/A 1.5 μg/m3 (6) 6.0
 
March 21, 2020, 8 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.2 ppb (2) N/A 2.9 μg/m3 (12) 12.0
 
March 21, 2020, 7 p.m. N/A N/A N/A 7.0 ppb (6) N/A N/A N/A 0.1 ppb (1) N/A 2.2 μg/m3 (9) 9.0
 
March 21, 2020, 6 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.2 ppb (2) N/A 3.9 μg/m3 (16) 16.0
 
March 21, 2020, 5 p.m. N/A N/A N/A 12.0 ppb (11) N/A N/A N/A 0.2 ppb (2) N/A 4.0 μg/m3 (17) 17.0
 
March 21, 2020, 4 p.m. N/A N/A N/A 16.0 ppb (15) N/A N/A N/A 0.3 ppb (3) N/A 4.4 μg/m3 (18) 18.0
 
March 21, 2020, 3 p.m. N/A N/A N/A 29.0 ppb (27) N/A N/A N/A 0.4 ppb (4) N/A 7.5 μg/m3 (31) 31.0
 
March 21, 2020, 2 p.m. N/A N/A N/A 30.0 ppb (28) N/A N/A N/A 0.5 ppb (6) N/A 7.4 μg/m3 (31) 31.0
 
March 21, 2020, 1 p.m. N/A N/A N/A 38.0 ppb (35) N/A N/A N/A 0.6 ppb (7) N/A 20.6 μg/m3 (68) 68.0
 
March 21, 2020, noon N/A N/A N/A 37.0 ppb (34) N/A N/A N/A 0.7 ppb (8) N/A 21.3 μg/m3 (70) 70.0
 
March 21, 2020, 11 a.m. N/A N/A N/A 36.0 ppb (33) N/A N/A N/A 0.4 ppb (4) N/A 20.8 μg/m3 (69) 69.0
 
March 21, 2020, 10 a.m. N/A N/A N/A 37.0 ppb (34) N/A N/A N/A 0.5 ppb (6) N/A 22.4 μg/m3 (72) 72.0