ID: 2439

AQSQID: 291890016

Site Name: Rider Trail I-70

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

Updated: Feb. 26, 2021, 3:32 p.m.

Location: Bridgeton (Natural Bridge Jct), MO

Reporting: True, Located: True

Current AQI: 27.0

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
Feb. 26, 2021, 2 p.m. 28.3 ppb (27) 10.5 ppb (10) N/A 18.0 ppb (17) N/A 2.0 ppb (3) N/A N/A N/A N/A 27.0
 
Feb. 26, 2021, 1 p.m. 21.4 ppb (21) 3.3 ppb (4) N/A 18.0 ppb (17) N/A 2.0 ppb (3) N/A N/A N/A N/A 21.0
 
Feb. 26, 2021, noon 18.8 ppb (18) 1.0 ppb (1) N/A 18.0 ppb (17) N/A 1.0 ppb (2) N/A N/A N/A N/A 18.0
 
Feb. 26, 2021, 11 a.m. 13.2 ppb (13) -0.1 ppb (0) N/A 13.0 ppb (13) N/A 1.0 ppb (2) N/A N/A N/A N/A 13.0
 
Feb. 26, 2021, 10 a.m. 15.2 ppb (15) -0.1 ppb (0) N/A 15.0 ppb (15) N/A 1.0 ppb (2) N/A N/A N/A N/A 15.0
 
Feb. 26, 2021, 9 a.m. 15.8 ppb (15) -0.1 ppb (0) N/A 16.0 ppb (16) N/A 1.0 ppb (2) N/A N/A N/A N/A 16.0
 
Feb. 26, 2021, 8 a.m. 16.8 ppb (16) -0.1 ppb (0) N/A 17.0 ppb (17) N/A 1.0 ppb (2) N/A N/A N/A N/A 17.0
 
Feb. 26, 2021, 7 a.m. 22.2 ppb (21) 0.1 ppb (1) N/A 22.0 ppb (21) N/A 1.0 ppb (2) N/A N/A N/A N/A 21.0
 
Feb. 26, 2021, 6 a.m. 28.8 ppb (28) 2.1 ppb (2) N/A 27.0 ppb (26) N/A 1.0 ppb (2) N/A N/A N/A N/A 28.0
 
Feb. 26, 2021, 5 a.m. 26.3 ppb (25) 1.2 ppb (2) N/A 25.0 ppb (24) N/A 1.0 ppb (2) N/A N/A N/A N/A 25.0
 
Feb. 26, 2021, 4 a.m. 23.3 ppb (22) 0.1 ppb (1) N/A 23.0 ppb (22) N/A 1.0 ppb (2) N/A N/A N/A N/A 22.0
 
Feb. 26, 2021, 3 a.m. 20.8 ppb (20) 0.6 ppb (1) N/A 20.0 ppb (19) N/A 1.0 ppb (2) N/A N/A N/A N/A 20.0
 
Feb. 26, 2021, 2 a.m. 16.1 ppb (16) -0.2 ppb (0) N/A 16.0 ppb (16) N/A 1.0 ppb (2) N/A N/A N/A N/A 16.0
 
Feb. 26, 2021, 1 a.m. 11.7 ppb (12) 0.4 ppb (1) N/A 11.0 ppb (11) N/A 1.0 ppb (2) N/A N/A N/A N/A 12.0
 
Feb. 26, 2021, midnight 9.5 ppb (9) -0.1 ppb (0) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A N/A N/A N/A 10.0
 
Feb. 25, 2021, 11 p.m. 5.2 ppb (5) -0.2 ppb (0) N/A 5.0 ppb (5) N/A 2.0 ppb (3) N/A N/A N/A N/A 5.0
 
Feb. 25, 2021, 10 p.m. 2.2 ppb (3) -0.1 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (2) N/A N/A N/A N/A 3.0
 
Feb. 25, 2021, 9 p.m. 3.4 ppb (4) 0.9 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) N/A N/A N/A N/A 4.0
 
Feb. 25, 2021, 8 p.m. 2.0 ppb (2) 0.0 ppb (0) N/A 2.0 ppb (2) N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
Feb. 25, 2021, 7 p.m. 3.2 ppb (4) 0.6 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) N/A N/A N/A N/A 4.0
 
Feb. 25, 2021, 6 p.m. 7.7 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 2.0 ppb (3) N/A N/A N/A N/A 8.0
 
Feb. 25, 2021, 5 p.m. 11.6 ppb (11) 3.6 ppb (4) N/A 8.0 ppb (8) N/A 2.0 ppb (3) N/A N/A N/A N/A 11.0
 
Feb. 25, 2021, 4 p.m. 18.1 ppb (18) 7.6 ppb (8) N/A 10.0 ppb (10) N/A 2.0 ppb (3) N/A N/A N/A N/A 18.0
 
Feb. 25, 2021, 3 p.m. 8.6 ppb (9) 2.4 ppb (3) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A N/A N/A N/A 9.0
 
Feb. 25, 2021, 2 p.m. 11.6 ppb (11) 3.2 ppb (4) N/A 8.0 ppb (8) N/A 1.0 ppb (2) N/A N/A N/A N/A 11.0
 
Feb. 25, 2021, 1 p.m. 11.2 ppb (11) 1.4 ppb (2) N/A 10.0 ppb (10) N/A 1.0 ppb (2) N/A N/A N/A N/A 11.0
 
Feb. 25, 2021, noon 14.8 ppb (14) 1.5 ppb (2) N/A 13.0 ppb (13) N/A 1.0 ppb (2) N/A N/A N/A N/A 14.0
 
Feb. 25, 2021, 11 a.m. 11.8 ppb (12) 0.4 ppb (1) N/A 11.0 ppb (11) N/A 1.0 ppb (2) N/A N/A N/A N/A 12.0
 
Feb. 25, 2021, 10 a.m. 14.1 ppb (14) 0.0 ppb (0) N/A 14.0 ppb (14) N/A 1.0 ppb (2) N/A N/A N/A N/A 14.0
 
Feb. 25, 2021, 9 a.m. 13.8 ppb (14) 0.4 ppb (1) N/A 13.0 ppb (13) N/A 1.0 ppb (2) N/A N/A N/A N/A 14.0
 
Feb. 25, 2021, 8 a.m. 9.4 ppb (9) -0.2 ppb (0) N/A 9.0 ppb (9) N/A 1.0 ppb (2) N/A N/A N/A N/A 9.0
 
Feb. 25, 2021, 7 a.m. 5.9 ppb (6) -0.3 ppb (0) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A N/A N/A N/A 6.0
 
Feb. 25, 2021, 6 a.m. 4.9 ppb (5) -0.2 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A N/A N/A N/A 5.0
 
Feb. 25, 2021, 5 a.m. 4.9 ppb (5) -0.3 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A N/A N/A N/A 5.0
 
Feb. 25, 2021, 4 a.m. 5.1 ppb (5) -0.3 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A N/A N/A N/A 5.0
 
Feb. 25, 2021, 3 a.m. 4.9 ppb (5) -0.2 ppb (0) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A N/A N/A N/A 5.0
 
Feb. 25, 2021, 2 a.m. 3.7 ppb (4) -0.3 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (2) N/A N/A N/A N/A 4.0
 
Feb. 25, 2021, 1 a.m. 3.6 ppb (4) -0.3 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (2) N/A N/A N/A N/A 4.0
 
Feb. 25, 2021, midnight 3.5 ppb (4) -0.2 ppb (0) N/A 4.0 ppb (4) N/A 1.0 ppb (2) N/A N/A N/A N/A 4.0
 
Feb. 24, 2021, 11 p.m. 3.3 ppb (4) 0.0 ppb (0) N/A 3.0 ppb (3) N/A 1.0 ppb (2) N/A N/A N/A N/A 4.0
 
Feb. 24, 2021, 10 p.m. 3.0 ppb (3) 0.3 ppb (1) N/A 3.0 ppb (3) N/A 1.0 ppb (2) N/A N/A N/A N/A 3.0
 
Feb. 24, 2021, 9 p.m. 2.8 ppb (3) 0.5 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) N/A N/A N/A N/A 3.0
 
Feb. 24, 2021, 8 p.m. 2.6 ppb (3) 0.3 ppb (1) N/A 2.0 ppb (2) N/A 1.0 ppb (2) N/A N/A N/A N/A 3.0
 
Feb. 24, 2021, 7 p.m. 2.7 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
 
Feb. 24, 2021, 6 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
Feb. 24, 2021, 5 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
Feb. 24, 2021, 4 p.m. N/A N/A N/A N/A N/A 1.0 ppb (2) N/A N/A N/A N/A 2.0
 
Feb. 24, 2021, 3 p.m. 7.6 ppb (8) 3.4 ppb (4) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A N/A N/A N/A 8.0
 
Feb. 24, 2021, 2 p.m. 6.7 ppb (7) 2.0 ppb (2) N/A 5.0 ppb (5) N/A 1.0 ppb (2) N/A N/A N/A N/A 7.0
 
Feb. 24, 2021, 1 p.m. 36.2 ppb (35) 12.9 ppb (13) N/A 24.0 ppb (23) N/A 2.0 ppb (3) N/A N/A N/A N/A 35.0
 
Feb. 24, 2021, noon 51.8 ppb (49) 19.0 ppb (18) N/A 34.0 ppb (33) N/A 3.0 ppb (5) N/A N/A N/A N/A 49.0
 
Feb. 24, 2021, 11 a.m. 33.8 ppb (32) 8.0 ppb (8) N/A 26.0 ppb (25) N/A 2.0 ppb (3) N/A N/A N/A N/A 32.0
 
Feb. 24, 2021, 10 a.m. 14.9 ppb (15) 3.3 ppb (4) N/A 12.0 ppb (12) N/A 3.0 ppb (5) N/A N/A N/A N/A 15.0
 
Feb. 24, 2021, 9 a.m. 9.0 ppb (9) 2.9 ppb (3) N/A 7.0 ppb (7) N/A 2.0 ppb (3) N/A N/A N/A N/A 9.0
 
Feb. 24, 2021, 8 a.m. 6.8 ppb (7) 2.8 ppb (3) N/A 4.0 ppb (4) N/A 1.0 ppb (2) N/A N/A N/A N/A 7.0
 
Feb. 24, 2021, 7 a.m. 6.2 ppb (6) 2.7 ppb (3) N/A 4.0 ppb (4) N/A 2.0 ppb (3) N/A N/A N/A N/A 6.0
 
Feb. 24, 2021, 6 a.m. 9.9 ppb (10) 3.5 ppb (4) N/A 7.0 ppb (7) N/A 2.0 ppb (3) N/A N/A N/A N/A 10.0
 
Feb. 24, 2021, 5 a.m. 17.7 ppb (17) 5.1 ppb (5) N/A 13.0 ppb (13) N/A 2.0 ppb (3) N/A N/A N/A N/A 17.0
 
Feb. 24, 2021, 4 a.m. 16.5 ppb (16) 5.3 ppb (5) N/A 12.0 ppb (12) N/A 2.0 ppb (3) N/A N/A N/A N/A 16.0
 
Feb. 24, 2021, 3 a.m. 17.3 ppb (17) 6.5 ppb (7) N/A 11.0 ppb (11) N/A 2.0 ppb (3) N/A N/A N/A N/A 17.0
 
Feb. 24, 2021, 2 a.m. 17.2 ppb (17) 5.8 ppb (6) N/A 12.0 ppb (12) N/A 2.0 ppb (3) N/A N/A N/A N/A 17.0
 
Feb. 24, 2021, 1 a.m. 24.1 ppb (23) 10.0 ppb (10) N/A 15.0 ppb (15) N/A 2.0 ppb (3) N/A N/A N/A N/A 23.0
 
Feb. 24, 2021, midnight 38.3 ppb (37) 17.8 ppb (17) N/A 21.0 ppb (20) N/A 2.0 ppb (3) N/A N/A N/A N/A 37.0
 
Feb. 23, 2021, 11 p.m. 39.5 ppb (38) 16.4 ppb (16) N/A 24.0 ppb (23) N/A 4.0 ppb (6) N/A N/A N/A N/A 38.0
 
Feb. 23, 2021, 10 p.m. 37.1 ppb (35) 18.5 ppb (18) N/A 19.0 ppb (18) N/A 4.0 ppb (6) N/A N/A N/A N/A 35.0
 
Feb. 23, 2021, 9 p.m. 39.0 ppb (37) 20.1 ppb (19) N/A 20.0 ppb (19) N/A 2.0 ppb (3) N/A N/A N/A N/A 37.0
 
Feb. 23, 2021, 8 p.m. 33.3 ppb (32) 16.4 ppb (16) N/A 18.0 ppb (17) N/A 2.0 ppb (3) N/A N/A N/A N/A 32.0
 
Feb. 23, 2021, 7 p.m. 35.1 ppb (34) 18.8 ppb (18) N/A 17.0 ppb (17) N/A 4.0 ppb (6) N/A N/A N/A N/A 34.0
 
Feb. 23, 2021, 6 p.m. 35.4 ppb (34) 18.7 ppb (18) N/A 17.0 ppb (17) N/A 7.0 ppb (10) N/A N/A N/A N/A 34.0
 
Feb. 23, 2021, 5 p.m. 33.7 ppb (32) 17.2 ppb (17) N/A 17.0 ppb (17) N/A 3.0 ppb (5) N/A N/A N/A N/A 32.0
 
Feb. 23, 2021, 4 p.m. 35.6 ppb (34) 20.5 ppb (20) N/A 16.0 ppb (16) N/A 2.0 ppb (3) N/A N/A N/A N/A 34.0
 
Feb. 23, 2021, 3 p.m. 37.3 ppb (36) 21.1 ppb (20) N/A 17.0 ppb (17) N/A 3.0 ppb (5) N/A N/A N/A N/A 36.0
 
Feb. 23, 2021, 2 p.m. 39.2 ppb (37) 21.5 ppb (21) N/A 18.0 ppb (17) N/A 3.0 ppb (5) N/A N/A N/A N/A 37.0
 
Feb. 23, 2021, 1 p.m. 56.9 ppb (55) 29.6 ppb (28) N/A 28.0 ppb (27) N/A 2.0 ppb (3) N/A N/A N/A N/A 55.0
 
Feb. 23, 2021, noon 68.7 ppb (67) 35.4 ppb (34) N/A 34.0 ppb (33) N/A 2.0 ppb (3) N/A N/A N/A N/A 67.0
 
Feb. 23, 2021, 11 a.m. 27.6 ppb (27) 9.2 ppb (9) N/A 19.0 ppb (18) N/A 2.0 ppb (3) N/A N/A N/A N/A 27.0
 
Feb. 23, 2021, 10 a.m. 24.5 ppb (24) 10.1 ppb (10) N/A 15.0 ppb (15) N/A 2.0 ppb (3) N/A N/A N/A N/A 24.0
 
Feb. 23, 2021, 9 a.m. 14.8 ppb (14) 5.7 ppb (6) N/A 10.0 ppb (10) N/A 2.0 ppb (3) N/A N/A N/A N/A 14.0
 
Feb. 23, 2021, 8 a.m. 8.7 ppb (9) 4.0 ppb (4) N/A 5.0 ppb (5) N/A 2.0 ppb (3) N/A N/A N/A N/A 9.0
 
Feb. 23, 2021, 7 a.m. 7.4 ppb (7) 3.3 ppb (4) N/A 5.0 ppb (5) N/A 2.0 ppb (3) N/A N/A N/A N/A 7.0
 
Feb. 23, 2021, 6 a.m. 6.5 ppb (7) 2.6 ppb (3) N/A 4.0 ppb (4) N/A 2.0 ppb (3) N/A N/A N/A N/A 7.0
 
Feb. 23, 2021, 5 a.m. 8.1 ppb (8) 3.5 ppb (4) N/A 5.0 ppb (5) N/A 4.0 ppb (6) N/A N/A N/A N/A 8.0
 
Feb. 23, 2021, 4 a.m. 10.1 ppb (10) 3.8 ppb (4) N/A 7.0 ppb (7) N/A 9.0 ppb (13) N/A N/A N/A N/A 13.0
 
Feb. 23, 2021, 3 a.m. 15.4 ppb (15) 5.7 ppb (6) N/A 10.0 ppb (10) N/A 13.0 ppb (19) N/A N/A N/A N/A 19.0
 
Feb. 23, 2021, 2 a.m. 13.5 ppb (13) 5.4 ppb (6) N/A 8.0 ppb (8) N/A 7.0 ppb (10) N/A N/A N/A N/A 13.0
 
Feb. 23, 2021, 1 a.m. 14.9 ppb (15) 5.3 ppb (5) N/A 10.0 ppb (10) N/A 6.0 ppb (9) N/A N/A N/A N/A 15.0
 
Feb. 23, 2021, midnight 20.5 ppb (20) 7.4 ppb (7) N/A 14.0 ppb (14) N/A 5.0 ppb (8) N/A N/A N/A N/A 20.0
 
Feb. 22, 2021, 11 p.m. 23.1 ppb (22) 9.8 ppb (10) N/A 14.0 ppb (14) N/A 4.0 ppb (6) N/A N/A N/A N/A 22.0
 
Feb. 22, 2021, 10 p.m. 26.3 ppb (25) 13.2 ppb (13) N/A 14.0 ppb (14) N/A 3.0 ppb (5) N/A N/A N/A N/A 25.0
 
Feb. 22, 2021, 9 p.m. 29.6 ppb (28) 14.8 ppb (14) N/A 16.0 ppb (16) N/A 4.0 ppb (6) N/A N/A N/A N/A 28.0
 
Feb. 22, 2021, 8 p.m. 26.4 ppb (25) 14.2 ppb (14) N/A 13.0 ppb (13) N/A 4.0 ppb (6) N/A N/A N/A N/A 25.0
 
Feb. 22, 2021, 7 p.m. 23.5 ppb (23) 12.5 ppb (12) N/A 12.0 ppb (12) N/A 2.0 ppb (3) N/A N/A N/A N/A 23.0
 
Feb. 22, 2021, 6 p.m. 24.8 ppb (24) 14.0 ppb (14) N/A 11.0 ppb (11) N/A 3.0 ppb (5) N/A N/A N/A N/A 24.0
 
Feb. 22, 2021, 5 p.m. 30.6 ppb (29) 17.9 ppb (17) N/A 13.0 ppb (13) N/A 9.0 ppb (13) N/A N/A N/A N/A 29.0
 
Feb. 22, 2021, 4 p.m. 27.6 ppb (27) 15.3 ppb (15) N/A 13.0 ppb (13) N/A 4.0 ppb (6) N/A N/A N/A N/A 27.0
 
Feb. 22, 2021, 3 p.m. 29.2 ppb (28) 15.8 ppb (15) N/A 14.0 ppb (14) N/A 2.0 ppb (3) N/A N/A N/A N/A 28.0
 
Feb. 22, 2021, 2 p.m. 37.0 ppb (35) 19.1 ppb (19) N/A 19.0 ppb (18) N/A 2.0 ppb (3) N/A N/A N/A N/A 35.0
 
Feb. 22, 2021, 1 p.m. 32.4 ppb (31) 14.7 ppb (14) N/A 18.0 ppb (17) N/A 1.0 ppb (2) N/A N/A N/A N/A 31.0
 
Feb. 22, 2021, noon 33.1 ppb (32) 12.9 ppb (13) N/A 21.0 ppb (20) N/A 1.0 ppb (2) N/A N/A N/A N/A 32.0
 
Feb. 22, 2021, 11 a.m. 19.5 ppb (19) 6.5 ppb (7) N/A 13.0 ppb (13) N/A 1.0 ppb (2) N/A N/A N/A N/A 19.0
 
Feb. 22, 2021, 10 a.m. 11.7 ppb (12) 3.2 ppb (4) N/A 9.0 ppb (9) N/A 1.0 ppb (2) N/A N/A N/A N/A 12.0
 
Feb. 22, 2021, 9 a.m. 9.2 ppb (9) 2.5 ppb (3) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A N/A N/A N/A 9.0
 
Feb. 22, 2021, 8 a.m. 8.1 ppb (8) 2.0 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A N/A N/A N/A 8.0
 
Feb. 22, 2021, 7 a.m. 7.9 ppb (8) 2.1 ppb (2) N/A 6.0 ppb (6) N/A 1.0 ppb (2) N/A N/A N/A N/A 8.0
 
Feb. 22, 2021, 6 a.m. 9.5 ppb (9) 2.9 ppb (3) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A N/A N/A N/A 9.0
 
Feb. 22, 2021, 5 a.m. 10.4 ppb (10) 3.3 ppb (4) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A N/A N/A N/A 10.0
 
Feb. 22, 2021, 4 a.m. 10.9 ppb (11) 4.1 ppb (4) N/A 7.0 ppb (7) N/A 2.0 ppb (3) N/A N/A N/A N/A 11.0
 
Feb. 22, 2021, 3 a.m. 10.1 ppb (10) 3.3 ppb (4) N/A 7.0 ppb (7) N/A 1.0 ppb (2) N/A N/A N/A N/A 10.0
 
Feb. 22, 2021, 2 a.m. 11.0 ppb (11) 4.2 ppb (4) N/A 7.0 ppb (7) N/A 2.0 ppb (3) N/A N/A N/A N/A 11.0
 
Feb. 22, 2021, 1 a.m. 12.1 ppb (12) 3.6 ppb (4) N/A 9.0 ppb (9) N/A 2.0 ppb (3) N/A N/A N/A N/A 12.0
 
Feb. 22, 2021, midnight 12.5 ppb (12) 4.9 ppb (5) N/A 8.0 ppb (8) N/A 2.0 ppb (3) N/A N/A N/A N/A 12.0
 
Feb. 21, 2021, 11 p.m. 10.9 ppb (11) 4.7 ppb (5) N/A 7.0 ppb (7) N/A 2.0 ppb (3) N/A N/A N/A N/A 11.0
 
Feb. 21, 2021, 10 p.m. 11.1 ppb (11) 4.8 ppb (5) N/A 7.0 ppb (7) N/A 3.0 ppb (5) N/A N/A N/A N/A 11.0
 
Feb. 21, 2021, 9 p.m. 13.5 ppb (13) 5.9 ppb (6) N/A 8.0 ppb (8) N/A 2.0 ppb (3) N/A N/A N/A N/A 13.0
 
Feb. 21, 2021, 8 p.m. 19.1 ppb (19) 8.0 ppb (8) N/A 12.0 ppb (12) N/A 3.0 ppb (5) N/A N/A N/A N/A 19.0
 
Feb. 21, 2021, 7 p.m. 16.2 ppb (16) 6.5 ppb (7) N/A 10.0 ppb (10) N/A 3.0 ppb (5) N/A N/A N/A N/A 16.0
 
Feb. 21, 2021, 6 p.m. 13.5 ppb (13) 5.9 ppb (6) N/A 8.0 ppb (8) N/A 3.0 ppb (5) N/A N/A N/A N/A 13.0
 
Feb. 21, 2021, 5 p.m. 13.4 ppb (13) 5.9 ppb (6) N/A 8.0 ppb (8) N/A 4.0 ppb (6) N/A N/A N/A N/A 13.0
 
Feb. 21, 2021, 4 p.m. 17.7 ppb (17) 7.7 ppb (8) N/A 11.0 ppb (11) N/A 4.0 ppb (6) N/A N/A N/A N/A 17.0
 
Feb. 21, 2021, 3 p.m. 20.7 ppb (20) 8.6 ppb (9) N/A 13.0 ppb (13) N/A 5.0 ppb (8) N/A N/A N/A N/A 20.0
 
Feb. 21, 2021, 2 p.m. 21.6 ppb (21) 7.7 ppb (8) N/A 14.0 ppb (14) N/A 6.0 ppb (9) N/A N/A N/A N/A 21.0
 
Feb. 21, 2021, 1 p.m. 22.0 ppb (21) 5.2 ppb (5) N/A 17.0 ppb (17) N/A 4.0 ppb (6) N/A N/A N/A N/A 21.0
 
Feb. 21, 2021, noon 20.7 ppb (20) 3.9 ppb (4) N/A 17.0 ppb (17) N/A 4.0 ppb (6) N/A N/A N/A N/A 20.0
 
Feb. 21, 2021, 11 a.m. 16.5 ppb (16) 2.3 ppb (3) N/A 15.0 ppb (15) N/A 5.0 ppb (8) N/A N/A N/A N/A 16.0
 
Feb. 21, 2021, 10 a.m. 14.5 ppb (14) 1.9 ppb (2) N/A 13.0 ppb (13) N/A 4.0 ppb (6) N/A N/A N/A N/A 14.0
 
Feb. 21, 2021, 9 a.m. 13.8 ppb (14) 2.3 ppb (3) N/A 12.0 ppb (12) N/A 3.0 ppb (5) N/A N/A N/A N/A 14.0
 
Feb. 21, 2021, 8 a.m. 14.2 ppb (14) 2.5 ppb (3) N/A 12.0 ppb (12) N/A 4.0 ppb (6) N/A N/A N/A N/A 14.0
 
Feb. 21, 2021, 7 a.m. 15.0 ppb (15) 2.6 ppb (3) N/A 13.0 ppb (13) N/A 4.0 ppb (6) N/A N/A N/A N/A 15.0
 
Feb. 21, 2021, 6 a.m. 18.2 ppb (18) 3.2 ppb (4) N/A 16.0 ppb (16) N/A 4.0 ppb (6) N/A N/A N/A N/A 18.0
 
Feb. 21, 2021, 5 a.m. 18.2 ppb (18) 3.5 ppb (4) N/A 15.0 ppb (15) N/A 4.0 ppb (6) N/A N/A N/A N/A 18.0
 
Feb. 21, 2021, 4 a.m. 17.3 ppb (17) 4.1 ppb (4) N/A 14.0 ppb (14) N/A 5.0 ppb (8) N/A N/A N/A N/A 17.0
 
Feb. 21, 2021, 3 a.m. 15.4 ppb (15) 4.3 ppb (5) N/A 12.0 ppb (12) N/A 4.0 ppb (6) N/A N/A N/A N/A 15.0
 
Feb. 21, 2021, 2 a.m. 14.9 ppb (15) 4.1 ppb (4) N/A 11.0 ppb (11) N/A 3.0 ppb (5) N/A N/A N/A N/A 15.0
 
Feb. 21, 2021, 1 a.m. 21.0 ppb (20) 6.2 ppb (6) N/A 15.0 ppb (15) N/A 2.0 ppb (3) N/A N/A N/A N/A 20.0
 
Feb. 21, 2021, midnight 30.0 ppb (29) 8.5 ppb (9) N/A 22.0 ppb (21) N/A 2.0 ppb (3) N/A N/A N/A N/A 29.0
 
Feb. 20, 2021, 11 p.m. 31.8 ppb (30) 9.7 ppb (10) N/A 23.0 ppb (22) N/A 2.0 ppb (3) N/A N/A N/A N/A 30.0
 
Feb. 20, 2021, 10 p.m. 28.9 ppb (28) 8.3 ppb (8) N/A 21.0 ppb (20) N/A 3.0 ppb (5) N/A N/A N/A N/A 28.0
 
Feb. 20, 2021, 9 p.m. 24.3 ppb (23) 8.6 ppb (9) N/A 16.0 ppb (16) N/A 4.0 ppb (6) N/A N/A N/A N/A 23.0
 
Feb. 20, 2021, 8 p.m. 30.2 ppb (29) 13.2 ppb (13) N/A 18.0 ppb (17) N/A 4.0 ppb (6) N/A N/A N/A N/A 29.0
 
Feb. 20, 2021, 7 p.m. 30.3 ppb (29) 14.2 ppb (14) N/A 17.0 ppb (17) N/A 2.0 ppb (3) N/A N/A N/A N/A 29.0
 
Feb. 20, 2021, 6 p.m. 29.5 ppb (28) 14.3 ppb (14) N/A 16.0 ppb (16) N/A 2.0 ppb (3) N/A N/A N/A N/A 28.0
 
Feb. 20, 2021, 5 p.m. 31.2 ppb (30) 15.0 ppb (15) N/A 17.0 ppb (17) N/A 3.0 ppb (5) N/A N/A N/A N/A 30.0
 
Feb. 20, 2021, 4 p.m. 38.8 ppb (37) 19.0 ppb (18) N/A 20.0 ppb (19) N/A 3.0 ppb (5) N/A N/A N/A N/A 37.0
 
Feb. 20, 2021, 3 p.m. 54.4 ppb (52) 29.0 ppb (28) N/A 26.0 ppb (25) N/A 3.0 ppb (5) N/A N/A N/A N/A 52.0
 
Feb. 20, 2021, 2 p.m. 64.8 ppb (63) 32.8 ppb (31) N/A 33.0 ppb (32) N/A 3.0 ppb (5) N/A N/A N/A N/A 63.0
 
Feb. 20, 2021, 1 p.m. 82.6 ppb (82) 39.0 ppb (37) N/A 45.0 ppb (43) N/A 2.0 ppb (3) N/A N/A N/A N/A 82.0
 
Feb. 20, 2021, noon 74.5 ppb (73) 25.0 ppb (24) N/A 50.0 ppb (48) N/A 2.0 ppb (3) N/A N/A N/A N/A 73.0
 
Feb. 20, 2021, 11 a.m. 59.5 ppb (57) 15.9 ppb (15) N/A 44.0 ppb (42) N/A 2.0 ppb (3) N/A N/A N/A N/A 57.0
 
Feb. 20, 2021, 10 a.m. 46.6 ppb (44) 8.6 ppb (9) N/A 39.0 ppb (37) N/A 3.0 ppb (5) N/A N/A N/A N/A 44.0
 
Feb. 20, 2021, 9 a.m. 47.7 ppb (45) 8.1 ppb (8) N/A 40.0 ppb (38) N/A 3.0 ppb (5) N/A N/A N/A N/A 45.0
 
Feb. 20, 2021, 8 a.m. 56.7 ppb (54) 14.0 ppb (14) N/A 43.0 ppb (41) N/A 3.0 ppb (5) N/A N/A N/A N/A 54.0
 
Feb. 20, 2021, 7 a.m. 62.4 ppb (60) 16.1 ppb (16) N/A 47.0 ppb (45) N/A 2.0 ppb (3) N/A N/A N/A N/A 60.0
 
Feb. 20, 2021, 6 a.m. 50.2 ppb (48) 8.5 ppb (9) N/A 42.0 ppb (40) N/A 3.0 ppb (5) N/A N/A N/A N/A 48.0
 
Feb. 20, 2021, 5 a.m. 34.9 ppb (33) 4.1 ppb (4) N/A 31.0 ppb (30) N/A 3.0 ppb (5) N/A N/A N/A N/A 33.0
 
Feb. 20, 2021, 4 a.m. 29.1 ppb (28) 5.3 ppb (5) N/A 24.0 ppb (23) N/A 4.0 ppb (6) N/A N/A N/A N/A 28.0
 
Feb. 20, 2021, 3 a.m. 28.2 ppb (27) 7.1 ppb (7) N/A 22.0 ppb (21) N/A 5.0 ppb (8) N/A N/A N/A N/A 27.0
 
Feb. 20, 2021, 2 a.m. 44.9 ppb (43) 12.9 ppb (13) N/A 33.0 ppb (32) N/A 5.0 ppb (8) N/A N/A N/A N/A 43.0
 
Feb. 20, 2021, 1 a.m. 61.3 ppb (59) 21.1 ppb (20) N/A 41.0 ppb (39) N/A 8.0 ppb (12) N/A N/A N/A N/A 59.0
 
Feb. 20, 2021, midnight 53.0 ppb (50) 19.4 ppb (19) N/A 35.0 ppb (34) N/A 7.0 ppb (10) N/A N/A N/A N/A 50.0
 
Feb. 19, 2021, 11 p.m. 40.9 ppb (39) 16.1 ppb (16) N/A 25.0 ppb (24) N/A 5.0 ppb (8) N/A N/A N/A N/A 39.0
 
Feb. 19, 2021, 10 p.m. 32.6 ppb (31) 15.3 ppb (15) N/A 18.0 ppb (17) N/A 2.0 ppb (3) N/A N/A N/A N/A 31.0
 
Feb. 19, 2021, 9 p.m. 30.0 ppb (29) 15.9 ppb (15) N/A 15.0 ppb (15) N/A 2.0 ppb (3) N/A N/A N/A N/A 29.0
 
Feb. 19, 2021, 8 p.m. 28.5 ppb (27) 15.2 ppb (15) N/A 14.0 ppb (14) N/A 2.0 ppb (3) N/A N/A N/A N/A 27.0
 
Feb. 19, 2021, 7 p.m. N/A N/A N/A N/A N/A 2.0 ppb (3) N/A N/A N/A N/A 3.0
 
Feb. 19, 2021, 6 p.m. N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Feb. 19, 2021, 5 p.m. 45.7 ppb (44) 26.6 ppb (26) N/A 20.0 ppb (19) N/A 2.0 ppb (3) N/A N/A N/A N/A 44.0
 
Feb. 19, 2021, 4 p.m. 44.9 ppb (43) 25.2 ppb (24) N/A 20.0 ppb (19) N/A 2.0 ppb (3) N/A N/A N/A N/A 43.0
 
Feb. 19, 2021, 3 p.m. 61.2 ppb (59) 36.7 ppb (35) N/A 25.0 ppb (24) N/A 2.0 ppb (3) N/A N/A N/A N/A 59.0