Diligence · Glossary
Septic System
Updated 2026-07-18
Septic System is an onsite wastewater treatment system that treats and disperses sewage where a public sewer connection is unavailable. In California, feasibility depends on soil, groundwater, slope, setbacks, lot area, design flow, and local environmental-health approval.
What it means
A typical system includes a septic tank and dispersal field; alternative systems add treatment or dosing when standard systems are unsuitable.
Why it matters for land decisions
Septic feasibility can determine whether and how intensively rural land can be developed.
- Reserve primary and replacement areas.
- Verify testing and permit records.
People also ask
Does a neighboring septic system prove feasibility?
No. Soil, groundwater, slope, setbacks, and design needs can vary within short distances.
Who approves septic systems in California?
County or city environmental health agencies commonly administer local onsite wastewater programs under state policy.
Official sources
Related terms
Check this on a California parcel
Parcel View screens zoning, flood, fire, soils, and planning layers for any California lot — every finding linked to the official source.