Quite a bit of cultural information in extant in the text along with some non-cultural details regarding living conditions. 

When looking at the text to identify information about the culture, simply check for facts. Some facts of life in Huck's culture include the use of steamboats on the river, the practice of holding religious revivals, and traveling shows and circuses. 

Living conditions are also an area of interest in the text. The fact that rats and mice were common place then (even more than today) is an indication of living conditions. On a culinary note, Huck mentions food occasionally, describing the types of food that were eaten at the time.