Septic System Information

Rather than adopting its own Local Area Management Program (LAMP), the City of Yorba Linda complies with the State Water Resources Control Board requirements for all new septic systems, repairs, and replacements.  Per the State Water Resource Control Board, a septic system shall be defined as an Onsite Wastewater Treatment System (OWTS).  

The local branch of the State Water Resources Control Board, the Santa Ana Regional Water Quality Control Board, can be contacted for additional information.  They have also provided answers to frequently asked questions about requirements related to OWTSs, which are listed below.

State of California Santa Ana Regional Water Quality Control Board

3737 Main Street
Riverside, CA 92501
951-781-4306 Phone
951-781-6288 Fax
Website

  1. Under the State Water Resource Control Board's requirements for OWTS in Tier 1, 3, and 4 are soil, site, and percolation tests required for full replacements?
  2. Does an OWTS replacement require a new 100% expansion area?
  3. Can seepage pits be installed instead of a leach field?
  4. Are seepage pits permissible when an existing lot size prohibits a leach field? This could be due to a pool, spa, detached structure(s), sloping terrain, or landscaping, etc.
  5. What if an existing site fails to meet soil & site evaluation analysis? This could be due to boring restrictions/findings, percolation test results, setbacks, or other requirements in Tiers 1, 3 or 4.
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