AQSQID: 080350004

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

Location: Douglas Co, CO

Reporting: True, Located: True

Current AQI: 46.0

Douglas Co CO, US: 39.5339, -105.07

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
May 25, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) N/A N/A 2.7 μg/m3 (11) 46.0
 
May 25, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) N/A N/A 2.7 μg/m3 (11) 46.0
 
May 25, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) N/A N/A 2.3 μg/m3 (10) 46.0
 
May 25, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 2.4 μg/m3 (10) 45.0
 
May 25, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 2.1 μg/m3 (9) 44.0
 
May 25, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 1.8 μg/m3 (8) 42.0
 
May 25, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 2.2 μg/m3 (9) 36.0
 
May 25, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 2.7 μg/m3 (11) 28.0
 
May 25, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 2.5 μg/m3 (10) 25.0
 
May 25, 2019, noon N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 2.5 μg/m3 (10) 19.0
 
May 25, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 2.7 μg/m3 (11) 15.0
 
May 25, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 2.6 μg/m3 (11) 22.0
 
May 25, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 2.3 μg/m3 (10) 22.0
 
May 25, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 2.3 μg/m3 (10) 24.0
 
May 25, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 2.5 μg/m3 (10) 25.0
 
May 25, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 3.1 μg/m3 (13) 27.0
 
May 25, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 6.3 μg/m3 (26) 30.0
 
May 25, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 4.2 μg/m3 (18) 33.0
 
May 25, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 48.0 ppb (37) N/A N/A 5.1 μg/m3 (21) 37.0
 
May 25, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 3.6 μg/m3 (15) 42.0
 
May 25, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 1.4 μg/m3 (6) 44.0
 
May 25, 2019, midnight N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 1.7 μg/m3 (7) 45.0
 
May 24, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 1.4 μg/m3 (6) 45.0
 
May 24, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 1.4 μg/m3 (6) 44.0
 
May 24, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 1.1 μg/m3 (5) 41.0
 
May 24, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 1.9 μg/m3 (8) 41.0
 
May 24, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 57.0 ppb (44) N/A N/A 1.1 μg/m3 (5) 44.0
 
May 24, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) N/A N/A 1.7 μg/m3 (7) 46.0
 
May 24, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 64.0 ppb (49) N/A N/A 1.5 μg/m3 (6) 49.0
 
May 24, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 66.0 ppb (51) N/A N/A 1.2 μg/m3 (5) 51.0
 
May 24, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 62.0 ppb (48) N/A N/A 1.3 μg/m3 (5) 48.0
 
May 24, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 60.0 ppb (46) N/A N/A 1.2 μg/m3 (5) 46.0
 
May 24, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 58.0 ppb (45) N/A N/A 1.1 μg/m3 (5) 45.0
 
May 24, 2019, noon N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 1.1 μg/m3 (5) 42.0
 
May 24, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 1.2 μg/m3 (5) 42.0
 
May 24, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 52.0 ppb (40) N/A N/A 2.3 μg/m3 (10) 40.0
 
May 24, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 6.0 μg/m3 (25) 29.0
 
May 24, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 8.0 μg/m3 (33) 33.0
 
May 24, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 11.1 μg/m3 (46) 46.0
 
May 24, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 6.7 μg/m3 (28) 28.0
 
May 24, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 8.3 μg/m3 (35) 35.0
 
May 24, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 7.5 μg/m3 (31) 31.0
 
May 24, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 8.3 μg/m3 (35) 35.0
 
May 24, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 24.0 ppb (18) N/A N/A 9.1 μg/m3 (38) 38.0
 
May 24, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 7.5 μg/m3 (31) 31.0
 
May 24, 2019, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 6.7 μg/m3 (28) 28.0
 
May 23, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 7.1 μg/m3 (30) 30.0
 
May 23, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 8.8 μg/m3 (37) 37.0
 
May 23, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 8.6 μg/m3 (36) 36.0
 
May 23, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 8.5 μg/m3 (35) 35.0
 
May 23, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 7.6 μg/m3 (32) 32.0
 
May 23, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 7.2 μg/m3 (30) 30.0
 
May 23, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 7.3 μg/m3 (30) 30.0
 
May 23, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 6.5 μg/m3 (27) 27.0
 
May 23, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 5.3 μg/m3 (22) 26.0
 
May 23, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 4.3 μg/m3 (18) 29.0
 
May 23, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 4.2 μg/m3 (18) 30.0
 
May 23, 2019, noon N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 4.3 μg/m3 (18) 30.0
 
May 23, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 9.1 μg/m3 (38) 38.0
 
May 23, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 15.6 μg/m3 (58) 58.0
 
May 23, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 19.0 μg/m3 (65) 65.0
 
May 23, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 15.9 μg/m3 (58) 58.0
 
May 23, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 13.3 μg/m3 (53) 53.0
 
May 23, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 12.2 μg/m3 (50) 50.0
 
May 23, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 11.3 μg/m3 (47) 47.0
 
May 23, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 10.9 μg/m3 (45) 45.0
 
May 23, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 7.3 μg/m3 (30) 30.0
 
May 23, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 5.9 μg/m3 (25) 29.0
 
May 23, 2019, 1 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
 
May 23, 2019, midnight 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
 
May 22, 2019, 11 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
 
May 22, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 4.1 μg/m3 (17) 35.0
 
May 22, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 46.0 ppb (35) N/A N/A 3.7 μg/m3 (15) 35.0
 
May 22, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 45.0 ppb (35) N/A N/A 3.4 μg/m3 (14) 35.0
 
May 22, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 43.0 ppb (33) N/A N/A 3.6 μg/m3 (15) 33.0
 
May 22, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 39.0 ppb (30) N/A N/A 3.4 μg/m3 (14) 30.0
 
May 22, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 6.4 μg/m3 (27) 28.0
 
May 22, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 8.8 μg/m3 (37) 37.0
 
May 22, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 8.7 μg/m3 (36) 36.0
 
May 22, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 9.8 μg/m3 (41) 41.0
 
May 22, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 10.0 μg/m3 (42) 42.0
 
May 22, 2019, noon N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 9.9 μg/m3 (41) 41.0
 
May 22, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 8.7 μg/m3 (36) 36.0
 
May 22, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 7.4 μg/m3 (31) 31.0
 
May 22, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 9.1 μg/m3 (38) 38.0
 
May 22, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 7.6 μg/m3 (32) 32.0
 
May 22, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 5.5 μg/m3 (23) 23.0
 
May 22, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 5.9 μg/m3 (25) 25.0
 
May 22, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 4.3 μg/m3 (18) 22.0
 
May 22, 2019, 4 a.m. 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
 
May 22, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 3.1 μg/m3 (13) 23.0
 
May 22, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 33.0 ppb (25) N/A N/A 2.8 μg/m3 (12) 25.0
 
May 22, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 3.9 μg/m3 (16) 25.0
 
May 22, 2019, midnight N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 4.6 μg/m3 (19) 23.0
 
May 21, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 4.5 μg/m3 (19) 23.0
 
May 21, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 4.2 μg/m3 (18) 25.0
 
May 21, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 4.2 μg/m3 (18) 23.0
 
May 21, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 4.2 μg/m3 (18) 22.0
 
May 21, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 4.4 μg/m3 (18) 22.0
 
May 21, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 27.0 ppb (21) N/A N/A 3.7 μg/m3 (15) 21.0
 
May 21, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 2.7 μg/m3 (11) 19.0
 
May 21, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 1.7 μg/m3 (7) 17.0
 
May 21, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 2.2 μg/m3 (9) 14.0
 
May 21, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 2.4 μg/m3 (10) 13.0
 
May 21, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 1.2 μg/m3 (5) 13.0
 
May 21, 2019, noon N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 1.1 μg/m3 (5) 12.0
 
May 21, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 14.0 ppb (11) N/A N/A 1.1 μg/m3 (5) 11.0
 
May 21, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 0.7 μg/m3 (3) 12.0
 
May 21, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 0.9 μg/m3 (4) 12.0
 
May 21, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 13.0 ppb (10) N/A N/A 1.8 μg/m3 (8) 10.0
 
May 21, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A N/A 1.8 μg/m3 (8) 8.0
 
May 21, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A 1.1 μg/m3 (5) 8.0
 
May 21, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A 1.0 μg/m3 (4) 8.0
 
May 21, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 5.0 ppb (4) N/A N/A 2.5 μg/m3 (10) 10.0
 
May 21, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 10.0 ppb (8) N/A N/A 2.2 μg/m3 (9) 9.0
 
May 21, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 11.0 ppb (8) N/A N/A 2.8 μg/m3 (12) 12.0
 
May 21, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 3.1 μg/m3 (13) 13.0
 
May 21, 2019, midnight N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 3.4 μg/m3 (14) 14.0
 
May 20, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 4.0 μg/m3 (17) 17.0
 
May 20, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 15.0 ppb (12) N/A N/A 4.5 μg/m3 (19) 19.0
 
May 20, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 4.5 μg/m3 (19) 19.0
 
May 20, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 4.1 μg/m3 (17) 18.0
 
May 20, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 3.5 μg/m3 (15) 17.0
 
May 20, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 3.0 μg/m3 (12) 16.0
 
May 20, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 3.4 μg/m3 (14) 15.0
 
May 20, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 17.0 ppb (13) N/A N/A 4.0 μg/m3 (17) 17.0
 
May 20, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 16.0 ppb (12) N/A N/A 4.1 μg/m3 (17) 17.0
 
May 20, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 18.0 ppb (14) N/A N/A 3.0 μg/m3 (12) 14.0
 
May 20, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 19.0 ppb (15) N/A N/A 2.3 μg/m3 (10) 15.0
 
May 20, 2019, noon N/A N/A N/A N/A N/A N/A 20.0 ppb (15) N/A N/A 2.5 μg/m3 (10) 15.0
 
May 20, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 2.6 μg/m3 (11) 16.0
 
May 20, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 4.0 μg/m3 (17) 19.0
 
May 20, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 4.4 μg/m3 (18) 22.0
 
May 20, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 5.2 μg/m3 (22) 23.0
 
May 20, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 30.0 ppb (23) N/A N/A 5.9 μg/m3 (25) 25.0
 
May 20, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 32.0 ppb (25) N/A N/A 5.7 μg/m3 (24) 25.0
 
May 20, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 6.1 μg/m3 (25) 28.0
 
May 20, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 6.2 μg/m3 (26) 28.0
 
May 20, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 6.8 μg/m3 (28) 28.0
 
May 20, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 7.2 μg/m3 (30) 30.0
 
May 20, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 35.0 ppb (27) N/A N/A 8.0 μg/m3 (33) 33.0
 
May 20, 2019, midnight N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 7.7 μg/m3 (32) 32.0
 
May 19, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 7.5 μg/m3 (31) 31.0
 
May 19, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 7.5 μg/m3 (31) 31.0
 
May 19, 2019, 9 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 7.7 μg/m3 (32) 32.0
 
May 19, 2019, 8 p.m. N/A N/A N/A N/A N/A N/A 38.0 ppb (29) N/A N/A 7.5 μg/m3 (31) 31.0
 
May 19, 2019, 7 p.m. N/A N/A N/A N/A N/A N/A 37.0 ppb (28) N/A N/A 7.8 μg/m3 (32) 32.0
 
May 19, 2019, 6 p.m. N/A N/A N/A N/A N/A N/A 34.0 ppb (26) N/A N/A 7.3 μg/m3 (30) 30.0
 
May 19, 2019, 5 p.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 6.4 μg/m3 (27) 27.0
 
May 19, 2019, 4 p.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 5.7 μg/m3 (24) 24.0
 
May 19, 2019, 3 p.m. N/A N/A N/A N/A N/A N/A 28.0 ppb (22) N/A N/A 4.7 μg/m3 (20) 22.0
 
May 19, 2019, 2 p.m. N/A N/A N/A N/A N/A N/A 25.0 ppb (19) N/A N/A 3.9 μg/m3 (16) 19.0
 
May 19, 2019, 1 p.m. N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 3.5 μg/m3 (15) 18.0
 
May 19, 2019, noon N/A N/A N/A N/A N/A N/A 23.0 ppb (18) N/A N/A 3.6 μg/m3 (15) 18.0
 
May 19, 2019, 11 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 5.0 μg/m3 (21) 21.0
 
May 19, 2019, 10 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 3.5 μg/m3 (15) 17.0
 
May 19, 2019, 9 a.m. N/A N/A N/A N/A N/A N/A 21.0 ppb (16) N/A N/A 2.7 μg/m3 (11) 16.0
 
May 19, 2019, 8 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 3.9 μg/m3 (16) 17.0
 
May 19, 2019, 7 a.m. N/A N/A N/A N/A N/A N/A 22.0 ppb (17) N/A N/A 4.3 μg/m3 (18) 18.0
 
May 19, 2019, 6 a.m. N/A N/A N/A N/A N/A N/A 26.0 ppb (20) N/A N/A 3.4 μg/m3 (14) 20.0
 
May 19, 2019, 5 a.m. N/A N/A N/A N/A N/A N/A 29.0 ppb (22) N/A N/A 3.1 μg/m3 (13) 22.0
 
May 19, 2019, 4 a.m. N/A N/A N/A N/A N/A N/A 31.0 ppb (24) N/A N/A 2.8 μg/m3 (12) 24.0
 
May 19, 2019, 3 a.m. N/A N/A N/A N/A N/A N/A 36.0 ppb (28) N/A N/A 2.5 μg/m3 (10) 28.0
 
May 19, 2019, 2 a.m. N/A N/A N/A N/A N/A N/A 47.0 ppb (36) N/A N/A 5.1 μg/m3 (21) 36.0
 
May 19, 2019, 1 a.m. N/A N/A N/A N/A N/A N/A 50.0 ppb (38) N/A N/A 4.1 μg/m3 (17) 38.0
 
May 19, 2019, midnight N/A N/A N/A N/A N/A N/A 55.0 ppb (42) N/A N/A 1.9 μg/m3 (8) 42.0
 
May 18, 2019, 11 p.m. N/A N/A N/A N/A N/A N/A 51.0 ppb (39) N/A N/A 3.9 μg/m3 (16) 39.0
 
May 18, 2019, 10 p.m. N/A N/A N/A N/A N/A N/A 53.0 ppb (41) N/A N/A 2.4 μg/m3 (10) 41.0