ID: 1373

AQSQID: 080350004

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

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

Updated: July 28, 2021, 7:53 p.m.

Location: Littleton (Roxborough Park Rd), CO

Reporting: True, Located: True

Current AQI: 114.0

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 28, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 94.0 ppb (114) N/A N/A 13.2 μg/m3 (54) 114.0
 
July 28, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 81.0 ppb (107) N/A N/A 11.2 μg/m3 (47) 107.0
 
July 28, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 68.0 ppb (94) N/A N/A 9.7 μg/m3 (41) 94.0
 
July 28, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 8.9 μg/m3 (38) 71.0
 
July 28, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 8.8 μg/m3 (37) 47.0
 
July 28, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 8.3 μg/m3 (35) 43.0
 
July 28, 2021, noon N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 8.5 μg/m3 (36) 43.0
 
July 28, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 7.7 μg/m3 (33) 51.0
 
July 28, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (65) N/A N/A 7.3 μg/m3 (31) 65.0
 
July 28, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (68) N/A N/A 7.1 μg/m3 (30) 68.0
 
July 28, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (74) N/A N/A 7.3 μg/m3 (31) 74.0
 
July 28, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (78) N/A N/A 7.3 μg/m3 (31) 78.0
 
July 28, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (74) N/A N/A 7.3 μg/m3 (31) 74.0
 
July 28, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 59.0 ppb (65) N/A N/A 7.3 μg/m3 (31) 65.0
 
July 28, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 8.6 μg/m3 (36) 61.0
 
July 28, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 9.2 μg/m3 (39) 71.0
 
July 28, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 64.0 ppb (81) N/A N/A 10.2 μg/m3 (43) 81.0
 
July 28, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 72.0 ppb (102) N/A N/A 7.1 μg/m3 (30) 102.0
 
July 28, 2021, midnight N/A N/A N/A N/A N/A N/A 77.0 ppb (105) N/A N/A 7.6 μg/m3 (32) 105.0
 
July 27, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 84.0 ppb (108) N/A N/A 9.8 μg/m3 (41) 108.0
 
July 27, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 87.0 ppb (110) N/A N/A 9.3 μg/m3 (39) 110.0
 
July 27, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 85.0 ppb (109) N/A N/A 8.8 μg/m3 (37) 109.0
 
July 27, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 87.0 ppb (110) N/A N/A 10.1 μg/m3 (43) 110.0
 
July 27, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 86.0 ppb (109) N/A N/A 11.2 μg/m3 (47) 109.0
 
July 27, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 84.0 ppb (108) N/A N/A 12.6 μg/m3 (53) 108.0
 
July 27, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 79.0 ppb (106) N/A N/A 14.1 μg/m3 (56) 106.0
 
July 27, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 71.0 ppb (101) N/A N/A 15.4 μg/m3 (58) 101.0
 
July 27, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 15.9 μg/m3 (59) 71.0
 
July 27, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 15.0 μg/m3 (58) 58.0
 
July 27, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 15.3 μg/m3 (58) 58.0
 
July 27, 2021, noon N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 14.2 μg/m3 (56) 56.0
 
July 27, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 14.9 μg/m3 (57) 57.0
 
July 27, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 15.3 μg/m3 (58) 58.0
 
July 27, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 13.3 μg/m3 (54) 54.0
 
July 27, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 13.6 μg/m3 (55) 55.0
 
July 27, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 12.6 μg/m3 (53) 58.0
 
July 27, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 12.6 μg/m3 (53) 58.0
 
July 27, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 16.1 μg/m3 (60) 60.0
 
July 27, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (68) N/A N/A 16.0 μg/m3 (60) 68.0
 
July 27, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (74) N/A N/A 17.1 μg/m3 (62) 74.0
 
July 27, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 19.5 μg/m3 (67) 71.0
 
July 27, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 76.0 ppb (104) N/A N/A 16.8 μg/m3 (61) 104.0
 
July 27, 2021, midnight N/A N/A N/A N/A N/A N/A 87.0 ppb (110) N/A N/A 17.4 μg/m3 (63) 110.0
 
July 26, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 88.0 ppb (110) N/A N/A 18.6 μg/m3 (65) 110.0
 
July 26, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 96.0 ppb (115) N/A N/A 17.8 μg/m3 (63) 115.0
 
July 26, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 98.0 ppb (116) N/A N/A 18.2 μg/m3 (64) 116.0
 
July 26, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 87.0 ppb (110) N/A N/A 19.9 μg/m3 (68) 110.0
 
July 26, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 85.0 ppb (109) N/A N/A 20.2 μg/m3 (69) 109.0
 
July 26, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 82.0 ppb (107) N/A N/A 15.8 μg/m3 (59) 107.0
 
July 26, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 74.0 ppb (103) N/A N/A 16.4 μg/m3 (61) 103.0
 
July 26, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (78) N/A N/A 16.7 μg/m3 (61) 78.0
 
July 26, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 16.0 μg/m3 (60) 60.0
 
July 26, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A 15.4 μg/m3 (58) 58.0
 
July 26, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 14.9 μg/m3 (57) 57.0
 
July 26, 2021, noon N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 15.9 μg/m3 (59) 59.0
 
July 26, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 15.9 μg/m3 (59) 59.0
 
July 26, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 15.2 μg/m3 (58) 58.0
 
July 26, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 15.7 μg/m3 (59) 59.0
 
July 26, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 16.2 μg/m3 (60) 60.0
 
July 26, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 16.2 μg/m3 (60) 71.0
 
July 26, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 66.0 ppb (87) N/A N/A 15.0 μg/m3 (58) 87.0
 
July 26, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (68) N/A N/A 13.9 μg/m3 (55) 68.0
 
July 26, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 65.0 ppb (84) N/A N/A 14.5 μg/m3 (57) 84.0
 
July 26, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (78) N/A N/A 12.4 μg/m3 (52) 78.0
 
July 26, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 65.0 ppb (84) N/A N/A 12.0 μg/m3 (50) 84.0
 
July 26, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 69.0 ppb (97) N/A N/A 10.3 μg/m3 (43) 97.0
 
July 26, 2021, midnight N/A N/A N/A N/A N/A N/A 74.0 ppb (103) N/A N/A 10.6 μg/m3 (45) 103.0
 
July 25, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 76.0 ppb (104) N/A N/A 11.2 μg/m3 (47) 104.0
 
July 25, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 82.0 ppb (107) N/A N/A 16.0 μg/m3 (60) 107.0
 
July 25, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 82.0 ppb (107) N/A N/A 17.1 μg/m3 (62) 107.0
 
July 25, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 79.0 ppb (106) N/A N/A 19.8 μg/m3 (68) 106.0
 
July 25, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 76.0 ppb (104) N/A N/A 19.6 μg/m3 (67) 104.0
 
July 25, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 75.0 ppb (104) N/A N/A 21.5 μg/m3 (71) 104.0
 
July 25, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 69.0 ppb (97) N/A N/A 26.6 μg/m3 (82) 97.0
 
July 25, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 29.3 μg/m3 (88) 88.0
 
July 25, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 29.9 μg/m3 (89) 89.0
 
July 25, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 33.7 μg/m3 (97) 97.0
 
July 25, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 36.3 μg/m3 (103) 103.0
 
July 25, 2021, noon N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 35.3 μg/m3 (100) 100.0
 
July 25, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (42) N/A N/A 36.1 μg/m3 (103) 103.0
 
July 25, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 38.4 μg/m3 (109) 109.0
 
July 25, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 40.3 μg/m3 (113) 113.0
 
July 25, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 40.3 μg/m3 (113) 113.0
 
July 25, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 41.3 μg/m3 (116) 116.0
 
July 25, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 41.6 μg/m3 (117) 117.0
 
July 25, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 42.0 μg/m3 (118) 118.0
 
July 25, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 41.0 μg/m3 (115) 115.0
 
July 25, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 40.1 μg/m3 (113) 113.0
 
July 25, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 56.0 ppb (55) N/A N/A 41.0 μg/m3 (115) 115.0
 
July 25, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 69.0 ppb (97) N/A N/A 41.3 μg/m3 (116) 116.0
 
July 25, 2021, midnight N/A N/A N/A N/A N/A N/A 72.0 ppb (102) N/A N/A 39.0 μg/m3 (110) 110.0
 
July 24, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 72.0 ppb (102) N/A N/A 32.4 μg/m3 (94) 102.0
 
July 24, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 72.0 ppb (102) N/A N/A 28.0 μg/m3 (85) 102.0
 
July 24, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 72.0 ppb (102) N/A N/A 24.6 μg/m3 (78) 102.0
 
July 24, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 76.0 ppb (104) N/A N/A 21.4 μg/m3 (71) 104.0
 
July 24, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 74.0 ppb (103) N/A N/A 16.1 μg/m3 (60) 103.0
 
July 24, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 66.0 ppb (87) N/A N/A 13.3 μg/m3 (54) 87.0
 
July 24, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (58) N/A N/A 12.6 μg/m3 (53) 58.0
 
July 24, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (48) N/A N/A 11.7 μg/m3 (49) 49.0
 
July 24, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 9.3 μg/m3 (39) 43.0
 
July 24, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 40.0 ppb (38) N/A N/A 6.8 μg/m3 (29) 38.0
 
July 24, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (33) N/A N/A 8.9 μg/m3 (38) 38.0
 
July 24, 2021, noon N/A N/A N/A N/A N/A N/A 34.0 ppb (32) N/A N/A 6.0 μg/m3 (25) 32.0
 
July 24, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 5.5 μg/m3 (23) 40.0
 
July 24, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 4.6 μg/m3 (20) 41.0
 
July 24, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 4.5 μg/m3 (19) 46.0
 
July 24, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 4.5 μg/m3 (19) 43.0
 
July 24, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 49.0 ppb (46) N/A N/A 4.2 μg/m3 (18) 46.0
 
July 24, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (74) N/A N/A 3.9 μg/m3 (17) 74.0
 
July 24, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (61) N/A N/A 4.5 μg/m3 (19) 61.0
 
July 24, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (49) N/A N/A 5.6 μg/m3 (24) 49.0
 
July 24, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (78) N/A N/A 5.0 μg/m3 (21) 78.0
 
July 24, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 68.0 ppb (94) N/A N/A 6.6 μg/m3 (28) 94.0
 
July 24, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 72.0 ppb (102) N/A N/A 6.4 μg/m3 (27) 102.0
 
July 24, 2021, midnight N/A N/A N/A N/A N/A N/A 67.0 ppb (91) N/A N/A 7.2 μg/m3 (31) 91.0
 
July 23, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (74) N/A N/A 8.9 μg/m3 (38) 74.0
 
July 23, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 66.0 ppb (87) N/A N/A 9.8 μg/m3 (41) 87.0
 
July 23, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 85.0 ppb (109) N/A N/A 8.7 μg/m3 (37) 109.0
 
July 23, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 82.0 ppb (107) N/A N/A 9.0 μg/m3 (38) 107.0
 
July 23, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 84.0 ppb (108) N/A N/A 8.6 μg/m3 (36) 108.0
 
July 23, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 85.0 ppb (109) N/A N/A 8.8 μg/m3 (37) 109.0
 
July 23, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 83.0 ppb (108) N/A N/A 8.5 μg/m3 (36) 108.0
 
July 23, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 71.0 ppb (101) N/A N/A 7.5 μg/m3 (32) 101.0
 
July 23, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (68) N/A N/A 7.5 μg/m3 (32) 68.0
 
July 23, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 7.9 μg/m3 (33) 43.0
 
July 23, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 7.7 μg/m3 (33) 37.0
 
July 23, 2021, noon N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 7.5 μg/m3 (32) 37.0
 
July 23, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 42.0 ppb (39) N/A N/A 7.4 μg/m3 (31) 39.0
 
July 23, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (40) N/A N/A 7.4 μg/m3 (31) 40.0
 
July 23, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (45) N/A N/A 7.2 μg/m3 (31) 45.0
 
July 23, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (47) N/A N/A 7.0 μg/m3 (30) 47.0
 
July 23, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (51) N/A N/A 6.4 μg/m3 (27) 51.0
 
July 23, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (74) N/A N/A 6.3 μg/m3 (27) 74.0
 
July 23, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 68.0 ppb (94) N/A N/A 5.5 μg/m3 (23) 94.0
 
July 23, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 72.0 ppb (102) N/A N/A 5.7 μg/m3 (24) 102.0
 
July 23, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 75.0 ppb (104) N/A N/A 6.5 μg/m3 (28) 104.0
 
July 23, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 71.0 ppb (101) N/A N/A 7.3 μg/m3 (31) 101.0
 
July 23, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 71.0 ppb (101) N/A N/A 8.4 μg/m3 (36) 101.0
 
July 23, 2021, midnight N/A N/A N/A N/A N/A N/A 82.0 ppb (107) N/A N/A 7.6 μg/m3 (32) 107.0
 
July 22, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 98.0 ppb (116) N/A N/A 7.5 μg/m3 (32) 116.0
 
July 22, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 104.0 ppb (119) N/A N/A 8.4 μg/m3 (36) 119.0
 
July 22, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 103.0 ppb (118) N/A N/A 9.7 μg/m3 (41) 118.0
 
July 22, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 103.0 ppb (118) N/A N/A 9.7 μg/m3 (41) 118.0
 
July 22, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 102.0 ppb (118) N/A N/A 9.7 μg/m3 (41) 118.0
 
July 22, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A 99.0 ppb (116) N/A N/A 9.7 μg/m3 (41) 116.0
 
July 22, 2021, 5 p.m. N/A N/A N/A N/A N/A N/A 79.0 ppb (106) N/A N/A 8.1 μg/m3 (34) 106.0
 
July 22, 2021, 4 p.m. N/A N/A N/A N/A N/A N/A 65.0 ppb (84) N/A N/A 7.3 μg/m3 (31) 84.0
 
July 22, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 6.8 μg/m3 (29) 50.0
 
July 22, 2021, 2 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 6.1 μg/m3 (26) 43.0
 
July 22, 2021, 1 p.m. N/A N/A N/A N/A N/A N/A 44.0 ppb (41) N/A N/A 6.9 μg/m3 (29) 41.0
 
July 22, 2021, noon N/A N/A N/A N/A N/A N/A 39.0 ppb (37) N/A N/A 7.0 μg/m3 (30) 37.0
 
July 22, 2021, 11 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (44) N/A N/A 6.0 μg/m3 (25) 44.0
 
July 22, 2021, 10 a.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (43) N/A N/A 5.0 μg/m3 (21) 43.0
 
July 22, 2021, 9 a.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (50) N/A N/A 6.1 μg/m3 (26) 50.0
 
July 22, 2021, 8 a.m. N/A N/A N/A N/A N/A N/A 54.0 ppb (50) N/A N/A 5.2 μg/m3 (22) 50.0
 
July 22, 2021, 7 a.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 5.1 μg/m3 (22) 71.0
 
July 22, 2021, 6 a.m. N/A N/A N/A N/A N/A N/A 65.0 ppb (84) N/A N/A 4.4 μg/m3 (19) 84.0
 
July 22, 2021, 5 a.m. N/A N/A N/A N/A N/A N/A 63.0 ppb (78) N/A N/A 4.7 μg/m3 (20) 78.0
 
July 22, 2021, 4 a.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 5.5 μg/m3 (23) 71.0
 
July 22, 2021, 3 a.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (74) N/A N/A 6.2 μg/m3 (26) 74.0
 
July 22, 2021, 2 a.m. N/A N/A N/A N/A N/A N/A 61.0 ppb (71) N/A N/A 7.7 μg/m3 (33) 71.0
 
July 22, 2021, 1 a.m. N/A N/A N/A N/A N/A N/A 67.0 ppb (91) N/A N/A 10.5 μg/m3 (44) 91.0
 
July 22, 2021, midnight N/A N/A N/A N/A N/A N/A 83.0 ppb (108) N/A N/A 10.9 μg/m3 (46) 108.0
 
July 21, 2021, 11 p.m. N/A N/A N/A N/A N/A N/A 87.0 ppb (110) N/A N/A 12.7 μg/m3 (53) 110.0
 
July 21, 2021, 10 p.m. N/A N/A N/A N/A N/A N/A 89.0 ppb (111) N/A N/A 12.1 μg/m3 (51) 111.0
 
July 21, 2021, 9 p.m. N/A N/A N/A N/A N/A N/A 90.0 ppb (112) N/A N/A 12.3 μg/m3 (52) 112.0
 
July 21, 2021, 8 p.m. N/A N/A N/A N/A N/A N/A 93.0 ppb (113) N/A N/A 14.7 μg/m3 (57) 113.0
 
July 21, 2021, 7 p.m. N/A N/A N/A N/A N/A N/A 98.0 ppb (116) N/A N/A 14.9 μg/m3 (57) 116.0