
Why North Valley systems fail
- Age — many were installed decades ago
- Small lots with little room for a field
- Shallow groundwater
- Old steel or cracked concrete tanks
What replacement looks like now
Today's rules may require more separation from groundwater or more treatment than the original system had. On many North Valley lots that means an advanced treatment system with a smaller field.

Steps
- Diagnose the current system
- Evaluate the lot
- Design and permit the replacement
- Remove or abandon the old components
- Install, inspect and restore the yard
Common questions
Do I have to upgrade to an advanced system?
Only if the site and rules require it.
What if sewer is available?
Ask the utility whether connection is available or required.
How disruptive is a replacement?
The yard is excavated in the system area, then graded back.