# area The typically recommended drainfield area per person is about 40 to 70 square meters. This varies from state to state in the United States. For a household with 2.5 people, a drainfield area of 100 square meters is generally recommended. Users can modify the area based on the number of people in a household. The parameters area and cap may be modified appropriately to study the effects of a larger population size using septic systems. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://swatplus.gitbook.io/io-docs/introduction-1/structural-practices/septic.str/area.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.