Land Use

The primary responsibility of Land Use Program is reviewing and approving plans for Onsite Wastewater Treatment Systems within designated cities and unincorporated areas of the County of Los Angeles in an effort to protect groundwater sources. Program personnel also inspect and permit septic tank pumping vehicles, chemical toilet pumping vehicles, and toilet rental agencies. In addition, we are responsible for evaluating subdivision requests and conducting environmental reviews within its scope.


  • Review and approve plans for construction, renovation, expansion or repair of Onsite Wastewater Treatment Systems by conducting field inspections and reviewing soil evaluations, percolation test data, as well as historical records
  • Perform field inspections to assess parcel and tract maps, the feasibility of new land use proposals, conditional use permits, zone changes, etc., for the Department of Regional Planning
  • Conduct field inspections and record searches to prove assessments of existing Onsite Wastewater Treatment Systems
  • Inspect sewage cleaning vehicles, chemical toilet pumping vehicles and toilet rental agencies

Important Resources

How Your Septic System Works

Care for Your Septic System

Why Maintain Your Septic System

Other Resources