ID: 2439

AQSQID: 291890016

Site Name: Rider Trail I-70

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

Updated: Dec. 9, 2021, 7:16 a.m.

Location: Bridgeton (Natural Bridge Jct), MO

Reporting: True, Located: True

Current AQI: 24.0

Bridgeton (Natural Bridge Jct) MO, US: 38.75264, -90.44884

Date Observed (UTC) NOX NO NOY NO2 NO2Y SO2 OZONE CO PM10 PM2.5 AQI AQI/500
Dec. 9, 2021, 5 a.m. 25.4 ppb (24) 9.2 ppb (9) N/A 16.0 ppb (16) N/A 2.0 ppb (3) N/A N/A N/A N/A 24.0
 
Dec. 9, 2021, 4 a.m. 25.8 ppb (25) 10.8 ppb (11) N/A 15.0 ppb (15) N/A 3.0 ppb (5) N/A N/A N/A N/A 25.0
 
Dec. 9, 2021, 3 a.m. 31.5 ppb (30) 13.9 ppb (14) N/A 18.0 ppb (17) N/A 2.0 ppb (3) N/A N/A N/A N/A 30.0
 
Dec. 9, 2021, 2 a.m. 52.3 ppb (50) 22.5 ppb (22) N/A 30.0 ppb (29) N/A 1.0 ppb (2) N/A N/A N/A N/A 50.0
 
Dec. 9, 2021, 1 a.m. 78.4 ppb (77) 41.2 ppb (39) N/A 38.0 ppb (36) N/A 2.0 ppb (3) N/A N/A N/A N/A 77.0
 
Dec. 9, 2021, midnight 58.9 ppb (57) 24.0 ppb (23) N/A 35.0 ppb (34) N/A 1.0 ppb (2) N/A N/A N/A N/A 57.0
 
Dec. 8, 2021, 11 p.m. 30.9 ppb (30) 2.6 ppb (3) N/A 28.0 ppb (27) N/A 1.0 ppb (2) N/A N/A N/A N/A 30.0
 
Dec. 8, 2021, 10 p.m. 18.3 ppb (18) 2.0 ppb (2) N/A 16.0 ppb (16) N/A 1.0 ppb (2) N/A N/A N/A N/A 18.0
 
Dec. 8, 2021, 9 p.m. 39.6 ppb (38) 19.4 ppb (19) N/A 20.0 ppb (19) N/A 1.0 ppb (2) N/A N/A N/A N/A 38.0
 
Dec. 8, 2021, 8 p.m. 30.9 ppb (30) 15.0 ppb (15) N/A 16.0 ppb (16) N/A 1.0 ppb (2) N/A N/A N/A N/A 30.0
 
Dec. 8, 2021, 7 p.m. 7.3 ppb (7) 2.9 ppb (3) N/A 4.0 ppb (4) N/A 1.0 ppb (2) N/A N/A N/A N/A 7.0
 
Dec. 8, 2021, 6 p.m. 15.6 ppb (15) 7.9 ppb (8) N/A 8.0 ppb (8) N/A 1.0 ppb (2) N/A N/A N/A N/A 15.0
 
Dec. 8, 2021, 5 p.m. 9.4 ppb (9) 3.7 ppb (4) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A N/A N/A N/A 9.0
 
Dec. 8, 2021, 4 p.m. 13.0 ppb (13) 6.2 ppb (6) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A N/A N/A N/A 13.0
 
Dec. 8, 2021, 3 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Dec. 8, 2021, 2 p.m. 53.7 ppb (51) 35.6 ppb (34) N/A 19.0 ppb (18) N/A 1.0 ppb (2) N/A N/A N/A N/A 51.0
 
Dec. 8, 2021, 1 p.m. 49.5 ppb (47) 30.7 ppb (29) N/A 19.0 ppb (18) N/A 1.0 ppb (2) N/A N/A N/A N/A 47.0
 
Dec. 8, 2021, noon 43.6 ppb (42) 25.6 ppb (25) N/A 18.0 ppb (17) N/A 1.0 ppb (2) N/A N/A N/A N/A 42.0
 
Dec. 8, 2021, 11 a.m. 28.5 ppb (27) 14.0 ppb (14) N/A 15.0 ppb (15) N/A 1.0 ppb (2) N/A N/A N/A N/A 27.0
 
Dec. 8, 2021, 10 a.m. 23.3 ppb (22) 10.0 ppb (10) N/A 13.0 ppb (13) N/A 1.0 ppb (2) N/A N/A N/A N/A 22.0
 
Dec. 8, 2021, 9 a.m. 22.5 ppb (22) 8.4 ppb (8) N/A 14.0 ppb (14) N/A 1.0 ppb (2) N/A N/A N/A N/A 22.0
 
Dec. 8, 2021, 8 a.m. 30.1 ppb (29) 13.6 ppb (13) N/A 17.0 ppb (17) N/A 1.0 ppb (2) N/A N/A N/A N/A 29.0
 
Dec. 8, 2021, 7 a.m. 24.8 ppb (24) 9.0 ppb (9) N/A 16.0 ppb (16) N/A 1.0 ppb (2) N/A N/A N/A N/A 24.0
 
Dec. 8, 2021, 6 a.m. 35.6 ppb (34) 17.0 ppb (17) N/A 19.0 ppb (18) N/A 1.0 ppb (2) N/A N/A N/A N/A 34.0
 
Dec. 8, 2021, 5 a.m. 27.2 ppb (26) 12.7 ppb (12) N/A 15.0 ppb (15) N/A 1.0 ppb (2) N/A N/A N/A N/A 26.0
 
Dec. 8, 2021, 4 a.m. 22.7 ppb (22) 10.0 ppb (10) N/A 13.0 ppb (13) N/A 1.0 ppb (2) N/A N/A N/A N/A 22.0
 
Dec. 8, 2021, 3 a.m. 27.5 ppb (26) 14.4 ppb (14) N/A 13.0 ppb (13) N/A 1.0 ppb (2) N/A N/A N/A N/A 26.0
 
Dec. 8, 2021, 2 a.m. 24.8 ppb (24) 13.0 ppb (13) N/A 12.0 ppb (12) N/A 1.0 ppb (2) N/A N/A N/A N/A 24.0
 
Dec. 8, 2021, 1 a.m. 22.8 ppb (22) 11.3 ppb (11) N/A 12.0 ppb (12) N/A 1.0 ppb (2) N/A N/A N/A N/A 22.0
 
Dec. 8, 2021, midnight 30.0 ppb (29) 15.3 ppb (15) N/A 15.0 ppb (15) N/A 1.0 ppb (2) N/A N/A N/A N/A 29.0
 
Dec. 7, 2021, 11 p.m. 38.6 ppb (37) 19.5 ppb (19) N/A 19.0 ppb (18) N/A 1.0 ppb (2) N/A N/A N/A N/A 37.0
 
Dec. 7, 2021, 9 p.m. 52.4 ppb (50) 32.6 ppb (31) N/A 20.0 ppb (19) N/A 2.0 ppb (3) N/A N/A N/A N/A 50.0
 
Dec. 7, 2021, 8 p.m. 46.0 ppb (44) 28.9 ppb (28) N/A 17.0 ppb (17) N/A 2.0 ppb (3) N/A N/A N/A N/A 44.0
 
Dec. 7, 2021, 7 p.m. 47.5 ppb (45) 29.9 ppb (29) N/A 18.0 ppb (17) N/A 2.0 ppb (3) N/A N/A N/A N/A 45.0
 
Dec. 7, 2021, 6 p.m. 49.4 ppb (47) 30.4 ppb (29) N/A 19.0 ppb (18) N/A 2.0 ppb (3) N/A N/A N/A N/A 47.0
 
Dec. 7, 2021, 5 p.m. 44.7 ppb (43) 27.6 ppb (27) N/A 17.0 ppb (17) N/A 1.0 ppb (2) N/A N/A N/A N/A 43.0
 
Dec. 7, 2021, 4 p.m. 43.4 ppb (41) 24.7 ppb (24) N/A 19.0 ppb (18) N/A 1.0 ppb (2) N/A N/A N/A N/A 41.0
 
Dec. 7, 2021, 3 p.m. 38.9 ppb (37) 19.6 ppb (19) N/A 20.0 ppb (19) N/A 1.0 ppb (2) N/A N/A N/A N/A 37.0
 
Dec. 7, 2021, 2 p.m. 49.9 ppb (48) 26.4 ppb (25) N/A 24.0 ppb (23) N/A 1.0 ppb (2) N/A N/A N/A N/A 48.0
 
Dec. 7, 2021, 1 p.m. 30.8 ppb (30) 12.3 ppb (12) N/A 19.0 ppb (18) N/A 2.0 ppb (3) N/A N/A N/A N/A 30.0
 
Dec. 7, 2021, noon 15.4 ppb (15) 4.7 ppb (5) N/A 11.0 ppb (11) N/A 1.0 ppb (2) N/A N/A N/A N/A 15.0
 
Dec. 7, 2021, 11 a.m. 4.9 ppb (5) 0.5 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A N/A N/A N/A 5.0
 
Dec. 7, 2021, 10 a.m. 4.1 ppb (4) 0.4 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) N/A N/A N/A N/A 4.0
 
Dec. 7, 2021, 9 a.m. 7.1 ppb (7) 0.4 ppb (1) N/A 7.0 ppb (7) N/A 2.0 ppb (3) N/A N/A N/A N/A 7.0
 
Dec. 7, 2021, 8 a.m. 7.6 ppb (8) 0.4 ppb (1) N/A 7.0 ppb (7) N/A 2.0 ppb (3) N/A N/A N/A N/A 8.0
 
Dec. 7, 2021, 7 a.m. 4.1 ppb (4) 0.4 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) N/A N/A N/A N/A 4.0
 
Dec. 7, 2021, 6 a.m. 2.8 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) N/A N/A N/A N/A 3.0
 
Dec. 7, 2021, 5 a.m. 4.1 ppb (4) 0.7 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) N/A N/A N/A N/A 4.0
 
Dec. 7, 2021, 4 a.m. 3.4 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) N/A N/A N/A N/A 4.0
 
Dec. 7, 2021, 3 a.m. 2.4 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) N/A N/A N/A N/A 3.0
 
Dec. 7, 2021, 2 a.m. 5.3 ppb (5) 0.6 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A N/A N/A N/A 5.0
 
Dec. 7, 2021, 1 a.m. 7.3 ppb (7) 1.2 ppb (2) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A N/A N/A N/A 7.0
 
Dec. 7, 2021, midnight 5.0 ppb (5) 0.6 ppb (1) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A N/A N/A N/A 5.0
 
Dec. 6, 2021, 11 p.m. 5.4 ppb (6) 1.1 ppb (2) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A N/A N/A N/A 6.0
 
Dec. 6, 2021, 10 p.m. 15.0 ppb (15) 5.3 ppb (5) N/A 10.0 ppb (10) N/A 0.0 ppb (0) N/A N/A N/A N/A 15.0
 
Dec. 6, 2021, 9 p.m. 7.8 ppb (8) 2.9 ppb (3) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A N/A N/A N/A 8.0
 
Dec. 6, 2021, 8 p.m. 6.7 ppb (7) 2.9 ppb (3) N/A 4.0 ppb (4) N/A 0.0 ppb (0) N/A N/A N/A N/A 7.0
 
Dec. 6, 2021, 7 p.m. 11.3 ppb (11) 6.1 ppb (6) N/A 5.0 ppb (5) N/A 0.0 ppb (0) N/A N/A N/A N/A 11.0
 
Dec. 6, 2021, 6 p.m. 5.5 ppb (6) 2.7 ppb (3) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A N/A N/A 6.0
 
Dec. 6, 2021, 5 p.m. 4.1 ppb (4) 1.8 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A N/A N/A 4.0
 
Dec. 6, 2021, 4 p.m. 2.9 ppb (3) 1.2 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A N/A N/A 3.0
 
Dec. 6, 2021, 3 p.m. 3.1 ppb (3) 1.1 ppb (2) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A N/A N/A 3.0
 
Dec. 6, 2021, 2 p.m. 4.6 ppb (5) 1.7 ppb (2) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A N/A N/A 5.0
 
Dec. 6, 2021, 1 p.m. 3.0 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A N/A N/A 3.0
 
Dec. 6, 2021, noon 2.4 ppb (3) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A N/A N/A 3.0
 
Dec. 6, 2021, 11 a.m. 2.3 ppb (3) 0.7 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A N/A N/A 3.0
 
Dec. 6, 2021, 10 a.m. 2.2 ppb (3) 0.4 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A N/A N/A 3.0
 
Dec. 6, 2021, 9 a.m. 1.8 ppb (2) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 0.0 ppb (0) N/A N/A N/A N/A 2.0
 
Dec. 6, 2021, 8 a.m. 2.9 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A N/A N/A 3.0
 
Dec. 6, 2021, 7 a.m. 3.0 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A N/A N/A 3.0
 
Dec. 6, 2021, 6 a.m. 3.3 ppb (4) 0.2 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A N/A N/A 4.0
 
Dec. 6, 2021, 5 a.m. 3.5 ppb (4) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 0.0 ppb (0) N/A N/A N/A N/A 4.0
 
Dec. 6, 2021, 4 a.m. 7.8 ppb (8) 0.4 ppb (1) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A N/A N/A N/A 8.0
 
Dec. 6, 2021, 3 a.m. 24.8 ppb (24) 4.8 ppb (5) N/A 20.0 ppb (19) N/A 0.0 ppb (0) N/A N/A N/A N/A 24.0
 
Dec. 6, 2021, 2 a.m. 27.9 ppb (27) 11.3 ppb (11) N/A 17.0 ppb (17) N/A 0.0 ppb (0) N/A N/A N/A N/A 27.0
 
Dec. 6, 2021, 1 a.m. 23.1 ppb (22) 10.9 ppb (11) N/A 12.0 ppb (12) N/A 0.0 ppb (0) N/A N/A N/A N/A 22.0
 
Dec. 6, 2021, midnight 25.7 ppb (25) 12.3 ppb (12) N/A 14.0 ppb (14) N/A 1.0 ppb (2) N/A N/A N/A N/A 25.0
 
Dec. 5, 2021, 11 p.m. 30.2 ppb (29) 13.4 ppb (13) N/A 17.0 ppb (17) N/A 1.0 ppb (2) N/A N/A N/A N/A 29.0
 
Dec. 5, 2021, 10 p.m. 23.0 ppb (22) 11.7 ppb (12) N/A 11.0 ppb (11) N/A 1.0 ppb (2) N/A N/A N/A N/A 22.0
 
Dec. 5, 2021, 9 p.m. 15.6 ppb (15) 8.8 ppb (9) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A N/A N/A N/A 15.0
 
Dec. 5, 2021, 8 p.m. 13.6 ppb (13) 7.4 ppb (7) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A N/A N/A N/A 13.0
 
Dec. 5, 2021, 7 p.m. 12.9 ppb (13) 7.2 ppb (7) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A N/A N/A N/A 13.0
 
Dec. 5, 2021, 6 p.m. 19.7 ppb (19) 10.0 ppb (10) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A N/A N/A N/A 19.0
 
Dec. 5, 2021, 5 p.m. 18.2 ppb (18) 10.0 ppb (10) N/A 8.0 ppb (8) N/A 1.0 ppb (2) N/A N/A N/A N/A 18.0
 
Dec. 5, 2021, 4 p.m. 20.9 ppb (20) 11.2 ppb (11) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A N/A N/A N/A 20.0
 
Dec. 5, 2021, 3 p.m. 21.6 ppb (21) 10.8 ppb (11) N/A 11.0 ppb (11) N/A 1.0 ppb (2) N/A N/A N/A N/A 21.0
 
Dec. 5, 2021, 2 p.m. 16.0 ppb (16) 6.8 ppb (7) N/A 9.0 ppb (9) N/A 1.0 ppb (2) N/A N/A N/A N/A 16.0
 
Dec. 5, 2021, 1 p.m. 12.8 ppb (13) 5.2 ppb (5) N/A 8.0 ppb (8) N/A 1.0 ppb (2) N/A N/A N/A N/A 13.0
 
Dec. 5, 2021, noon 10.3 ppb (10) 3.5 ppb (4) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A N/A N/A N/A 10.0
 
Dec. 5, 2021, 11 a.m. 11.6 ppb (11) 4.1 ppb (4) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A N/A N/A N/A 11.0
 
Dec. 5, 2021, 10 a.m. 13.4 ppb (13) 3.9 ppb (4) N/A 9.0 ppb (9) N/A 1.0 ppb (2) N/A N/A N/A N/A 13.0
 
Dec. 5, 2021, 9 a.m. 15.2 ppb (15) 3.1 ppb (3) N/A 12.0 ppb (12) N/A 1.0 ppb (2) N/A N/A N/A N/A 15.0
 
Dec. 5, 2021, 8 a.m. 12.5 ppb (12) 2.0 ppb (2) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A N/A N/A N/A 12.0
 
Dec. 5, 2021, 7 a.m. 12.3 ppb (12) 2.4 ppb (3) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A N/A N/A N/A 12.0
 
Dec. 5, 2021, 6 a.m. 14.1 ppb (14) 2.8 ppb (3) N/A 11.0 ppb (11) N/A 1.0 ppb (2) N/A N/A N/A N/A 14.0
 
Dec. 5, 2021, 5 a.m. 15.2 ppb (15) 2.9 ppb (3) N/A 12.0 ppb (12) N/A 0.0 ppb (0) N/A N/A N/A N/A 15.0
 
Dec. 5, 2021, 4 a.m. 10.3 ppb (10) 0.5 ppb (1) N/A 10.0 ppb (10) N/A 0.0 ppb (0) N/A N/A N/A N/A 10.0
 
Dec. 5, 2021, 3 a.m. 8.3 ppb (8) 0.5 ppb (1) N/A 8.0 ppb (8) N/A 0.0 ppb (0) N/A N/A N/A N/A 8.0
 
Dec. 5, 2021, 2 a.m. 8.6 ppb (9) 0.5 ppb (1) N/A 8.0 ppb (8) N/A 1.0 ppb (2) N/A N/A N/A N/A 9.0
 
Dec. 5, 2021, 1 a.m. 14.4 ppb (14) 1.3 ppb (2) N/A 13.0 ppb (13) N/A 1.0 ppb (2) N/A N/A N/A N/A 14.0
 
Dec. 5, 2021, midnight 13.1 ppb (13) 0.8 ppb (1) N/A 12.0 ppb (12) N/A 1.0 ppb (2) N/A N/A N/A N/A 13.0
 
Dec. 4, 2021, 11 p.m. 8.7 ppb (9) 0.6 ppb (1) N/A 8.0 ppb (8) N/A 1.0 ppb (2) N/A N/A N/A N/A 9.0
 
Dec. 4, 2021, 10 p.m. 3.7 ppb (4) 0.5 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) N/A N/A N/A N/A 4.0
 
Dec. 4, 2021, 9 p.m. 4.1 ppb (4) 0.8 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) N/A N/A N/A N/A 4.0
 
Dec. 4, 2021, 8 p.m. 4.6 ppb (5) 1.0 ppb (1) N/A 4.0 ppb (4) N/A 1.0 ppb (2) N/A N/A N/A N/A 5.0
 
Dec. 4, 2021, 7 p.m. 4.7 ppb (5) 1.1 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (2) N/A N/A N/A N/A 5.0
 
Dec. 4, 2021, 6 p.m. 5.6 ppb (6) 1.5 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (2) N/A N/A N/A N/A 6.0
 
Dec. 4, 2021, 5 p.m. 5.9 ppb (6) 1.9 ppb (2) N/A 4.0 ppb (4) N/A 1.0 ppb (2) N/A N/A N/A N/A 6.0
 
Dec. 4, 2021, 4 p.m. 8.4 ppb (8) 3.2 ppb (4) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A N/A N/A N/A 8.0
 
Dec. 4, 2021, 3 p.m. 10.3 ppb (10) 3.9 ppb (4) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A N/A N/A N/A 10.0
 
Dec. 4, 2021, 2 p.m. 16.4 ppb (16) 5.9 ppb (6) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A N/A N/A N/A 16.0
 
Dec. 4, 2021, 1 p.m. 19.5 ppb (19) 6.1 ppb (6) N/A 13.0 ppb (13) N/A 1.0 ppb (2) N/A N/A N/A N/A 19.0
 
Dec. 4, 2021, noon 21.8 ppb (21) 7.2 ppb (7) N/A 15.0 ppb (15) N/A 1.0 ppb (2) N/A N/A N/A N/A 21.0
 
Dec. 4, 2021, 11 a.m. 11.1 ppb (11) 1.3 ppb (2) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A N/A N/A N/A 11.0
 
Dec. 4, 2021, 10 a.m. 8.9 ppb (9) 0.8 ppb (1) N/A 8.0 ppb (8) N/A 1.0 ppb (2) N/A N/A N/A N/A 9.0
 
Dec. 4, 2021, 9 a.m. 7.6 ppb (8) 0.8 ppb (1) N/A 7.0 ppb (7) N/A 0.0 ppb (0) N/A N/A N/A N/A 8.0
 
Dec. 4, 2021, 8 a.m. 6.5 ppb (7) 0.5 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A N/A N/A N/A 7.0
 
Dec. 4, 2021, 7 a.m. 6.6 ppb (7) 0.6 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A N/A N/A N/A 7.0
 
Dec. 4, 2021, 6 a.m. 6.5 ppb (7) 0.5 ppb (1) N/A 6.0 ppb (6) N/A 0.0 ppb (0) N/A N/A N/A N/A 7.0
 
Dec. 4, 2021, 5 a.m. 6.9 ppb (7) 0.5 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A N/A N/A N/A 7.0
 
Dec. 4, 2021, 4 a.m. 10.4 ppb (10) 1.3 ppb (2) N/A 9.0 ppb (9) N/A 1.0 ppb (2) N/A N/A N/A N/A 10.0
 
Dec. 4, 2021, 3 a.m. 8.8 ppb (9) 0.7 ppb (1) N/A 8.0 ppb (8) N/A 1.0 ppb (2) N/A N/A N/A N/A 9.0
 
Dec. 4, 2021, 2 a.m. 7.1 ppb (7) 0.5 ppb (1) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A N/A N/A N/A 7.0
 
Dec. 4, 2021, 1 a.m. 5.8 ppb (6) 0.5 ppb (1) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A N/A N/A N/A 6.0
 
Dec. 4, 2021, midnight 6.3 ppb (6) 0.4 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A N/A N/A N/A 6.0
 
Dec. 3, 2021, 11 p.m. 10.6 ppb (10) 0.5 ppb (1) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A N/A N/A N/A 10.0
 
Dec. 3, 2021, 10 p.m. 17.9 ppb (17) 0.8 ppb (1) N/A 17.0 ppb (17) N/A 1.0 ppb (2) N/A N/A N/A N/A 17.0
 
Dec. 3, 2021, 9 p.m. 30.8 ppb (30) 8.0 ppb (8) N/A 23.0 ppb (22) N/A 1.0 ppb (2) N/A N/A N/A N/A 30.0
 
Dec. 3, 2021, 8 p.m. 43.6 ppb (42) 15.6 ppb (15) N/A 28.0 ppb (27) N/A 1.0 ppb (2) N/A N/A N/A N/A 42.0
 
Dec. 3, 2021, 7 p.m. 42.0 ppb (40) 16.7 ppb (16) N/A 26.0 ppb (25) N/A 1.0 ppb (2) N/A N/A N/A N/A 40.0
 
Dec. 3, 2021, 6 p.m. 35.6 ppb (34) 14.9 ppb (15) N/A 21.0 ppb (20) N/A 1.0 ppb (2) N/A N/A N/A N/A 34.0
 
Dec. 3, 2021, 5 p.m. 38.3 ppb (37) 18.4 ppb (18) N/A 20.0 ppb (19) N/A 1.0 ppb (2) N/A N/A N/A N/A 37.0
 
Dec. 3, 2021, 4 p.m. 36.3 ppb (35) 19.1 ppb (19) N/A 17.0 ppb (17) N/A 1.0 ppb (2) N/A N/A N/A N/A 35.0
 
Dec. 3, 2021, 3 p.m. 63.8 ppb (62) 37.7 ppb (36) N/A 27.0 ppb (26) N/A 1.0 ppb (2) N/A N/A N/A N/A 62.0
 
Dec. 3, 2021, 2 p.m. 83.9 ppb (83) 55.3 ppb (53) N/A 29.0 ppb (28) N/A 1.0 ppb (2) N/A N/A N/A N/A 83.0
 
Dec. 3, 2021, 1 p.m. 82.3 ppb (82) 52.0 ppb (50) N/A 31.0 ppb (30) N/A 1.0 ppb (2) N/A N/A N/A N/A 82.0
 
Dec. 3, 2021, noon 80.7 ppb (80) 50.6 ppb (48) N/A 31.0 ppb (30) N/A 1.0 ppb (2) N/A N/A N/A N/A 80.0
 
Dec. 3, 2021, 11 a.m. 55.5 ppb (53) 28.2 ppb (27) N/A 28.0 ppb (27) N/A 1.0 ppb (2) N/A N/A N/A N/A 53.0
 
Dec. 3, 2021, 10 a.m. 39.7 ppb (38) 14.1 ppb (14) N/A 26.0 ppb (25) N/A 0.0 ppb (0) N/A N/A N/A N/A 38.0
 
Dec. 3, 2021, 9 a.m. 36.7 ppb (35) 14.2 ppb (14) N/A 23.0 ppb (22) N/A 1.0 ppb (2) N/A N/A N/A N/A 35.0
 
Dec. 3, 2021, 8 a.m. 34.0 ppb (33) 11.2 ppb (11) N/A 23.0 ppb (22) N/A 1.0 ppb (2) N/A N/A N/A N/A 33.0
 
Dec. 3, 2021, 7 a.m. 36.8 ppb (35) 11.5 ppb (11) N/A 25.0 ppb (24) N/A 1.0 ppb (2) N/A N/A N/A N/A 35.0
 
Dec. 3, 2021, 6 a.m. 33.8 ppb (32) 7.5 ppb (8) N/A 26.0 ppb (25) N/A 1.0 ppb (2) N/A N/A N/A N/A 32.0
 
Dec. 3, 2021, 5 a.m. 36.4 ppb (35) 12.3 ppb (12) N/A 24.0 ppb (23) N/A 1.0 ppb (2) N/A N/A N/A N/A 35.0
 
Dec. 3, 2021, 4 a.m. 36.9 ppb (35) 13.6 ppb (13) N/A 23.0 ppb (22) N/A 1.0 ppb (2) N/A N/A N/A N/A 35.0
 
Dec. 3, 2021, 3 a.m. 20.3 ppb (20) 2.1 ppb (2) N/A 18.0 ppb (17) N/A 1.0 ppb (2) N/A N/A N/A N/A 20.0
 
Dec. 3, 2021, 2 a.m. 22.2 ppb (21) 1.2 ppb (2) N/A 21.0 ppb (20) N/A 0.0 ppb (0) N/A N/A N/A N/A 21.0
 
Dec. 3, 2021, 1 a.m. 34.6 ppb (33) 6.6 ppb (7) N/A 28.0 ppb (27) N/A 1.0 ppb (2) N/A N/A N/A N/A 33.0
 
Dec. 3, 2021, midnight 24.6 ppb (24) 3.5 ppb (4) N/A 21.0 ppb (20) N/A 1.0 ppb (2) N/A N/A N/A N/A 24.0
 
Dec. 2, 2021, 11 p.m. 11.1 ppb (11) 0.8 ppb (1) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A N/A N/A N/A 11.0
 
Dec. 2, 2021, 10 p.m. 7.1 ppb (7) 0.7 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A N/A N/A N/A 7.0
 
Dec. 2, 2021, 10 p.m. 7.1 ppb (7) 0.7 ppb (1) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A N/A N/A N/A 7.0
 
Dec. 2, 2021, 9 p.m. 10.6 ppb (10) 3.7 ppb (4) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A N/A N/A N/A 10.0
 
Dec. 2, 2021, 8 p.m. 7.5 ppb (8) 2.6 ppb (3) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A N/A N/A N/A 8.0
 
Dec. 2, 2021, 7 p.m. 20.9 ppb (20) 9.9 ppb (10) N/A 11.0 ppb (11) N/A 1.0 ppb (2) N/A N/A N/A N/A 20.0
 
Dec. 2, 2021, 6 p.m. 31.3 ppb (30) 16.9 ppb (16) N/A 15.0 ppb (15) N/A 1.0 ppb (2) N/A N/A N/A N/A 30.0
 
Dec. 2, 2021, 5 p.m. 19.9 ppb (19) 10.5 ppb (10) N/A 9.0 ppb (9) N/A 1.0 ppb (2) N/A N/A N/A N/A 19.0
 
Dec. 2, 2021, 4 p.m. 33.2 ppb (32) 20.2 ppb (20) N/A 13.0 ppb (13) N/A 1.0 ppb (2) N/A N/A N/A N/A 32.0
 
Dec. 2, 2021, 1 p.m. 37.7 ppb (36) 17.9 ppb (17) N/A 20.0 ppb (19) N/A 1.0 ppb (2) N/A N/A N/A N/A 36.0
 
Dec. 2, 2021, noon 41.0 ppb (39) 19.9 ppb (19) N/A 21.0 ppb (20) N/A 1.0 ppb (2) N/A N/A N/A N/A 39.0
 
Dec. 2, 2021, 11 a.m. 18.8 ppb (18) 7.0 ppb (7) N/A 12.0 ppb (12) N/A 1.0 ppb (2) N/A N/A N/A N/A 18.0
 
Dec. 2, 2021, 10 a.m. 14.6 ppb (14) 6.3 ppb (6) N/A 8.0 ppb (8) N/A 1.0 ppb (2) N/A N/A N/A N/A 14.0
 
Dec. 2, 2021, 9 a.m. 9.4 ppb (9) 4.1 ppb (4) N/A 5.0 ppb (5) N/A 2.0 ppb (3) N/A N/A N/A N/A 9.0
 
Dec. 2, 2021, 8 a.m. 8.3 ppb (8) 3.6 ppb (4) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A N/A N/A N/A 8.0
 
Dec. 2, 2021, 7 a.m. 5.9 ppb (6) 2.4 ppb (3) N/A 3.0 ppb (3) N/A 1.0 ppb (2) N/A N/A N/A N/A 6.0
 
Dec. 2, 2021, 6 a.m. 9.7 ppb (10) 3.4 ppb (4) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A N/A N/A N/A 10.0
 
Dec. 2, 2021, 5 a.m. 19.1 ppb (19) 7.7 ppb (8) N/A 11.0 ppb (11) N/A 1.0 ppb (2) N/A N/A N/A N/A 19.0
 
Dec. 2, 2021, 4 a.m. 27.6 ppb (27) 12.2 ppb (12) N/A 15.0 ppb (15) N/A 1.0 ppb (2) N/A N/A N/A N/A 27.0