California septic system permits (CA)
California calls a septic system an onsite wastewater treatment system. The state sets the policy and your county or regional water board issues the permit. Start here for the rules and the local agency.
California septic system permits
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What you can look up here
- Septic systemsPermits, inspections, and records for septic systems.
- Environmental conditionsContamination, tanks, spills, and permitted facilities near a site.
About this resource
- Provided by
- California State Water Resources Control Board (official)
- Covers
- California statewide
- Link status
- Opened normally at the last check
- Link checked
- Oct 20, 2026
- Web address
- https://www.waterboards.ca.gov/water_issues/programs/owts/
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