Summary of Requirements For Gravity Systems*
Colusa County uses the California Uniform Plumbing Code.
For general requirements and good practices see the FAQ page for Gravity System Requirements:
For UPC specifics:
Links to Colusa County Website
For County home page:
For County Building Code:
Cities and towns (requirements may differ)
*The information on this page is a summary for quick reference only and may not represent the latest standards. For complete and up-to-date information, see each counties official website.