ID: 1373

AQSQID: 080350004

Site Name: Chatfield Park - 11500 N. Roxborough Park Rd.

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

Updated: July 13, 2020, 1:34 p.m.

Location: Littleton (Roxborough Park Rd), CO

Reporting: True, Located: True

Current AQI: 29.0

Littleton (Roxborough Park Rd) CO, US: 39.5339, -105.07

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
July 13, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 3.0 μg/m3 (12) 29.0
 
July 13, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 2.7 μg/m3 (11) 36.0
 
July 13, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 2.7 μg/m3 (11) 35.0
 
July 13, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 2.7 μg/m3 (11) 29.0
 
July 13, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 2.8 μg/m3 (12) 28.0
 
July 13, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 2.4 μg/m3 (10) 30.0
 
July 13, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 2.3 μg/m3 (10) 32.0
 
July 13, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 3.0 μg/m3 (12) 35.0
 
July 13, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 6.6 μg/m3 (28) 35.0
 
July 13, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 6.4 μg/m3 (27) 38.0
 
July 13, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 4.7 μg/m3 (20) 44.0
 
July 13, 2020, midnight N/A N/A N/A N/A N/A N/A 61.0 ppb (47) N/A N/A 4.3 μg/m3 (18) 47.0
 
July 12, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (48) N/A N/A 4.3 μg/m3 (18) 48.0
 
July 12, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) N/A N/A 4.0 μg/m3 (17) 46.0
 
July 12, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 4.6 μg/m3 (19) 43.0
 
July 12, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (45) N/A N/A 6.2 μg/m3 (26) 45.0
 
July 12, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 66.0 ppb (51) N/A N/A 5.4 μg/m3 (23) 51.0
 
July 12, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 64.0 ppb (49) N/A N/A 5.1 μg/m3 (21) 49.0
 
July 12, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (48) N/A N/A 6.7 μg/m3 (28) 48.0
 
July 12, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (48) N/A N/A 7.5 μg/m3 (31) 48.0
 
July 12, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 7.8 μg/m3 (32) 43.0
 
July 12, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 7.6 μg/m3 (32) 41.0
 
July 12, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 7.8 μg/m3 (32) 41.0
 
July 12, 2020, noon N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 8.2 μg/m3 (34) 41.0
 
July 12, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 8.3 μg/m3 (35) 41.0
 
July 12, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (42) N/A N/A 8.5 μg/m3 (35) 42.0
 
July 12, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 8.4 μg/m3 (35) 42.0
 
July 12, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 8.2 μg/m3 (34) 43.0
 
July 12, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 7.7 μg/m3 (32) 41.0
 
July 12, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 7.0 μg/m3 (29) 33.0
 
July 12, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 6.4 μg/m3 (27) 32.0
 
July 12, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 6.6 μg/m3 (28) 32.0
 
July 11, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 64.0 ppb (49) N/A N/A 7.1 μg/m3 (30) 49.0
 
July 11, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 7.1 μg/m3 (30) 45.0
 
July 11, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 6.9 μg/m3 (29) 37.0
 
July 11, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 7.3 μg/m3 (30) 30.0
 
July 11, 2020, noon N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 8.7 μg/m3 (36) 36.0
 
July 11, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 6.8 μg/m3 (28) 29.0
 
July 11, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 6.4 μg/m3 (27) 35.0
 
July 11, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 6.5 μg/m3 (27) 36.0
 
July 11, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 6.8 μg/m3 (28) 33.0
 
July 11, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 7.2 μg/m3 (30) 30.0
 
July 11, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 6.6 μg/m3 (28) 33.0
 
July 11, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 6.2 μg/m3 (26) 35.0
 
July 10, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 66.0 ppb (51) N/A N/A 4.8 μg/m3 (20) 51.0
 
July 10, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 66.0 ppb (51) N/A N/A 6.2 μg/m3 (26) 51.0
 
July 10, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (48) N/A N/A 9.0 μg/m3 (38) 48.0
 
July 10, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 10.1 μg/m3 (42) 43.0
 
July 10, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 10.0 μg/m3 (42) 42.0
 
July 10, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 9.7 μg/m3 (40) 40.0
 
July 10, 2020, noon N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 10.5 μg/m3 (44) 44.0
 
July 10, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 10.4 μg/m3 (43) 43.0
 
July 10, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 10.6 μg/m3 (44) 44.0
 
July 10, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 10.5 μg/m3 (44) 44.0
 
July 10, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 11.4 μg/m3 (48) 48.0
 
July 10, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 11.5 μg/m3 (48) 48.0
 
July 10, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 11.2 μg/m3 (47) 47.0
 
July 10, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 10.5 μg/m3 (44) 44.0
 
July 10, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 10.3 μg/m3 (43) 43.0
 
July 9, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 73.0 ppb (57) N/A N/A 6.5 μg/m3 (27) 57.0
 
July 9, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (48) N/A N/A 6.1 μg/m3 (25) 48.0
 
July 9, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 6.7 μg/m3 (28) 45.0
 
July 9, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 7.6 μg/m3 (32) 38.0
 
July 9, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 6.7 μg/m3 (28) 33.0
 
July 9, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 10.5 μg/m3 (44) 44.0
 
July 9, 2020, noon N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 8.9 μg/m3 (37) 37.0
 
July 9, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 5.0 μg/m3 (21) 21.0
 
July 9, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 5.0 μg/m3 (21) 23.0
 
July 9, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 5.3 μg/m3 (22) 22.0
 
July 9, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 4.9 μg/m3 (20) 26.0
 
July 8, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (48) N/A N/A 3.8 μg/m3 (16) 48.0
 
July 8, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (48) N/A N/A 3.9 μg/m3 (16) 48.0
 
July 8, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 3.4 μg/m3 (14) 43.0
 
July 8, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 3.7 μg/m3 (15) 38.0
 
July 8, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 4.2 μg/m3 (18) 36.0
 
July 8, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 3.9 μg/m3 (16) 34.0
 
July 8, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 3.7 μg/m3 (15) 28.0
 
July 8, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 3.0 μg/m3 (12) 26.0
 
July 8, 2020, noon N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 3.2 μg/m3 (13) 25.0
 
July 8, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 3.4 μg/m3 (14) 23.0
 
July 8, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 3.6 μg/m3 (15) 24.0
 
July 8, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 3.6 μg/m3 (15) 22.0
 
July 8, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 3.8 μg/m3 (16) 22.0
 
July 8, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 3.6 μg/m3 (15) 21.0
 
July 8, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 3.5 μg/m3 (15) 25.0
 
July 8, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 3.3 μg/m3 (14) 28.0
 
July 8, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 3.8 μg/m3 (16) 32.0
 
July 7, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 3.5 μg/m3 (15) 35.0
 
July 7, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 4.4 μg/m3 (18) 35.0
 
July 7, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 5.5 μg/m3 (23) 37.0
 
July 7, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 3.6 μg/m3 (15) 35.0
 
July 7, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 5.5 μg/m3 (23) 34.0
 
July 7, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 3.8 μg/m3 (16) 33.0
 
July 7, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 3.2 μg/m3 (13) 33.0
 
July 7, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 3.3 μg/m3 (14) 33.0
 
July 7, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 3.4 μg/m3 (14) 34.0
 
July 7, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 4.7 μg/m3 (20) 32.0
 
July 7, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 4.3 μg/m3 (18) 32.0
 
July 7, 2020, noon N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 3.7 μg/m3 (15) 34.0
 
July 7, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 3.8 μg/m3 (16) 33.0
 
July 7, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 3.8 μg/m3 (16) 34.0
 
July 7, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 3.6 μg/m3 (15) 32.0
 
July 7, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 3.6 μg/m3 (15) 32.0
 
July 7, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 3.4 μg/m3 (14) 32.0
 
July 7, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 2.8 μg/m3 (12) 29.0
 
July 7, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 2.7 μg/m3 (11) 29.0
 
July 7, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 2.2 μg/m3 (9) 30.0
 
July 6, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 3.7 μg/m3 (15) 44.0
 
July 6, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 3.7 μg/m3 (15) 43.0
 
July 6, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 3.9 μg/m3 (16) 45.0
 
July 6, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (47) N/A N/A 4.1 μg/m3 (17) 47.0
 
July 6, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 3.8 μg/m3 (16) 40.0
 
July 6, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 3.9 μg/m3 (16) 32.0
 
July 6, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 3.4 μg/m3 (14) 28.0
 
July 6, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 3.8 μg/m3 (16) 25.0
 
July 6, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 3.6 μg/m3 (15) 15.0
 
July 6, 2020, noon N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 3.6 μg/m3 (15) 22.0
 
July 6, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 3.6 μg/m3 (15) 22.0
 
July 6, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 3.3 μg/m3 (14) 24.0
 
July 6, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 3.3 μg/m3 (14) 23.0
 
July 6, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 3.1 μg/m3 (13) 25.0
 
July 6, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 2.8 μg/m3 (12) 26.0
 
July 6, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 2.5 μg/m3 (10) 29.0
 
July 6, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 2.7 μg/m3 (11) 28.0
 
July 6, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 2.3 μg/m3 (10) 32.0
 
July 5, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 3.9 μg/m3 (16) 40.0
 
July 5, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 3.8 μg/m3 (16) 40.0
 
July 5, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 3.6 μg/m3 (15) 39.0
 
July 5, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 3.5 μg/m3 (15) 40.0
 
July 5, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 3.4 μg/m3 (14) 41.0
 
July 5, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 4.3 μg/m3 (18) 34.0
 
July 5, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 4.9 μg/m3 (20) 26.0
 
July 5, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 4.8 μg/m3 (20) 26.0
 
July 5, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 5.1 μg/m3 (21) 22.0
 
July 5, 2020, noon N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 4.5 μg/m3 (19) 19.0
 
July 5, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 4.5 μg/m3 (19) 20.0
 
July 5, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 4.7 μg/m3 (20) 21.0
 
July 5, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 5.3 μg/m3 (22) 22.0
 
July 5, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 5.6 μg/m3 (23) 23.0
 
July 5, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 3.7 μg/m3 (15) 23.0
 
July 5, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 7.7 μg/m3 (32) 32.0
 
July 5, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 4.6 μg/m3 (19) 25.0
 
July 5, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 6.5 μg/m3 (27) 27.0
 
July 5, 2020, 3 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 5.4 μg/m3 (23) 30.0
 
July 5, 2020, 2 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (34) N/A N/A 3.1 μg/m3 (13) 34.0
 
July 5, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 3.6 μg/m3 (15) 38.0
 
July 5, 2020, midnight N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 3.9 μg/m3 (16) 37.0
 
July 4, 2020, 11 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 4.7 μg/m3 (20) 35.0
 
July 4, 2020, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 3.3 μg/m3 (14) 35.0
 
July 4, 2020, 9 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 3.8 μg/m3 (16) 35.0
 
July 4, 2020, 8 p.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (38) N/A N/A 5.1 μg/m3 (21) 38.0
 
July 4, 2020, 7 p.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (43) N/A N/A 5.5 μg/m3 (23) 43.0
 
July 4, 2020, 6 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 5.3 μg/m3 (22) 41.0
 
July 4, 2020, 5 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 5.7 μg/m3 (24) 45.0
 
July 4, 2020, 4 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 5.4 μg/m3 (23) 39.0
 
July 4, 2020, 3 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 5.5 μg/m3 (23) 35.0
 
July 4, 2020, 2 p.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 4.7 μg/m3 (20) 32.0
 
July 4, 2020, 1 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 4.7 μg/m3 (20) 29.0
 
July 4, 2020, noon N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 4.3 μg/m3 (18) 31.0
 
July 4, 2020, 11 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 4.3 μg/m3 (18) 31.0
 
July 4, 2020, 10 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 4.3 μg/m3 (18) 32.0
 
July 4, 2020, 9 a.m. N/A N/A N/A N/A N/A N/A 41.0 ppb (32) N/A N/A 4.6 μg/m3 (19) 32.0
 
July 4, 2020, 8 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 4.6 μg/m3 (19) 30.0
 
July 4, 2020, 7 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 4.9 μg/m3 (20) 29.0
 
July 4, 2020, 6 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 4.8 μg/m3 (20) 29.0
 
July 4, 2020, 5 a.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (31) N/A N/A 4.4 μg/m3 (18) 31.0
 
July 4, 2020, 4 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (32) N/A N/A 4.5 μg/m3 (19) 32.0
 
July 4, 2020, 1 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 4.9 μg/m3 (20) 36.0