Mark Twain State Park
Data time: 9/26/2026 4:00 AM CST
Location
Address:
Highway V & 107 Mark Twain State Park
City:
Stoutville
Latitude:
39.474911
Longitude:
-91.788779
Region:
Rural Area
Air Quality Information
Pollutant
Concentration
Units of Measure
NO2
1.6
PPB
8hr-O3
0.019
PPM
PM10
13
ug/m3
SO2
1.2
PPB
https://dnr.mo.gov/air/hows-air/monitoring/sites/mark-twain-state-park-monroe
Hour
AQI
Class
Program
Responsible Pollutant
Activity Caution
Risk Groups
04:00
2
Good
NO2
NO2
None
None
04:00
18
Good
8hr-O3
O3P
None
None
04:00
12
Good
PM10
PM-10
None
None
04:00
2
Good
SO2
SO2
None
None
03:00
2
Good
NO2
NO2
None
None
03:00
18
Good
8hr-O3
O3P
None
None
03:00
12
Good
PM10
PM-10
None
None
03:00
2
Good
SO2
SO2
None
None
02:00
2
Good
NO2
NO2
None
None
02:00
17
Good
8hr-O3
O3P
None
None
02:00
12
Good
PM10
PM-10
None
None
02:00
2
Good
SO2
SO2
None
None
01:00
2
Good
NO2
NO2
None
None
01:00
17
Good
8hr-O3
O3P
None
None
01:00
12
Good
PM10
PM-10
None
None
01:00
2
Good
SO2
SO2
None
None
00:00
2
Good
NO2
NO2
None
None
00:00
17
Good
8hr-O3
O3P
None
None
00:00
12
Good
PM10
PM-10
None
None
00:00
2
Good
SO2
SO2
None
None
23:00
2
Good
NO2
NO2
None
None
23:00
12
Good
PM10
PM-10
None
None